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  • UIWebView Page Control

    - by Jack
    Hi, I would like to use a UIWebView to display some files (PDF, PPT, DOC) and would like to have the ability to scroll using external controls (ie a couple of buttons that, when pressed skip back and forward a page) and display the current page in a UITextView. Is this possible? I have no experience with javascript, but a friend of mine has suggested that this might be a useful approach. Is his suggestion valid? JP

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  • Trying to force redraw of UITableViewCell

    - by Suresh
    I found this post on Beveled UITableViewCells from http://news.selectstartstudios.com/beveled-uitableviewcells/. I'm using the technique to reduce the width of the cells, and for the most part it works great. However, I have a small problem. Sometimes the cells are not redrawn properly. For example, even though a cell is supposed to be a "middle" cell, it is drawn as a "top" cell: yfrog.com/f1screenshot20100424at100 How can I fix this? I have tried forcing the cell to redraw via [cell setNeedsDisplay], [cell setNeedsLayout], [tableView reloadRowAtIndexPath:withAnimation:], [cell drawrect:], and [tableView drawRect:atIndexPath]. I am out of ideas. Thanks again!

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  • Objective-C - open SMS

    - by teepusink
    Hi, How do I open SMS from my app and have the new message popped up and prepopulated? Right now this is what I have NSString *stringURL = @"sms:"; NSURL *url = [NSURL URLWithString:stringURL]; [[UIApplication sharedApplication] openURL:url]; That opens the SMS app but you have to click on new message etc. Thanks, Tee

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  • cellForRowAtIndexPath: crashes when trying to access the indexPath.row/[indexPath row]

    - by Emil
    Hey. I am loading in data to a UITableView, from a custom UITableViewCell (own class and nib). It works great, until I try to access the indexPath.row/[indexPath.row]. I'll post my code first, it will probably be easier for you to understand what I mean then. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"CustomCell"; CustomCell *cell = (CustomCell *) [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil){ NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"CustomCell" owner:self options:nil]; for (id currentObject in topLevelObjects){ if ([currentObject isKindOfClass:[CustomCell class]]){ cell = (CustomCell *) currentObject; break; } } } NSLog(@"%@", indexPath.row); // Configure the cell... NSUInteger row = indexPath.row; cell.titleLabel.text = [postsArrayTitle objectAtIndex:indexPath.row]; cell.dateLabel.text = [postsArrayDate objectAtIndex:indexPath.row]; cell.cellImage.image = [UIImage imageWithContentsOfFile:[postsArrayImg objectAtIndex:indexPath.row]]; NSLog(@"%@", indexPath.row); return cell; } The odd thing is, it does work when it loads in the first three cells (they are 125px high), but crashes when I try to scroll down. The indexPath is always avaliable, but not the indexPath.row, and I have no idea why it isn't! Please help me.. Thanks. Additional error code: *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSCFString objectAtIndex:]: unrecognized selector sent to instance 0x5d10c20' *** Call stack at first throw: ( 0 CoreFoundation 0x0239fc99 __exceptionPreprocess + 185 1 libobjc.A.dylib 0x024ed5de objc_exception_throw + 47 2 CoreFoundation 0x023a17ab -[NSObject(NSObject) doesNotRecognizeSelector:] + 187 3 CoreFoundation 0x02311496 ___forwarding___ + 966 4 CoreFoundation 0x02311052 _CF_forwarding_prep_0 + 50 5 MyFancyAppName 0x00002d1c -[HomeTableViewController tableView:cellForRowAtIndexPath:] + 516 [...])

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  • How to persist options selected in AlertDialog spawned from ItemizedOverlay onTap method

    - by ahsteele
    In the description of how to add a list of options to an AlertDialog the official Android documentation alludes to saving a users preferences with one of the "data storage techniques." The examples assume the AlertDialog has been spawned within an Activity class. In my case I've created a class that extends ItemizedOverlay. This class overrides the onTap method and uses an AlertDialog to prompt the user to make a multi-choice selection. I would like to capture and persist the selections for each OverlayItem they tap on. The below code is the onTap method I've written. It functions as written but doesn't yet do what I'd hope. I'd like to capture and persist each selection made by the user to be used later. How do I do that? Is using an AlertDialog in this manner a good idea? Are there better options? protected boolean onTap(int index) { OverlayItem item = _overlays.get(index); final CharSequence[] items = { "WiFi", "BlueTooth" }; final boolean[] checked = { false, false }; AlertDialog.Builder builder = new AlertDialog.Builder(_context); builder.setTitle(item.getTitle()); builder.setMultiChoiceItems(items, checked, new DialogInterface.OnMultiChoiceClickListener() { @Override public void onClick(DialogInterface dialog, int item, boolean isChecked) { // for now just show that the user touched an option Toast.makeText(_context, items[item], Toast.LENGTH_SHORT).show(); } }); builder.setPositiveButton("Okay", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { // should I be examining what was checked here? dialog.dismiss(); } }); builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { dialog.cancel(); } }); AlertDialog alert = builder.create(); alert.show(); return true; }

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  • cells order changes in UITableView after reloadSections: method

    - by user304895
    I'm having a problem using a grouped UITableView, and after 3 days of searching, I didn't found the solution... Actually, I have a Grouped table, composed of two sections : The first section contains a UISegmentedControl with three buttons : button0, button1 and button2. When clicking on the button0, I want to show two cells in the second section, with embedded UITextField in each cell. When clicking on the button1, I want to show one cell in the second section with an embedded UITextField. When clicking on the button2, I have to show the camera in ModalView (I think it will be ok). I've also put placeholders in each UITextField. Each time a button is clicked, I call a pickOne: method in order to update my view. In this method, I construct a NSIndexSet with NSRange of (1, 1), and then I call the reloadSections: method from the UITableViewController with NSIndexSet as a parameter. When the view appears for the first time, everything is ok, but when I click many times on the buttons, the order of the cells changes (cells containing the two textFields for the button0), and the new placeHolders are written over the old ones. Even more, sometimes when I click on the button0, it shows me only the second cell... Do you have any idea ? or need some code ? Thank you :)

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  • Showing login view controller before main tab bar controller

    - by Padawan
    I'm creating an iPad app with a tab bar controller that requires login. So on launch, I want to show a LoginViewController and if login is successful, then show the tab bar controller. This is how I implemented an initial test version (left out some typical header stuff, etc)... AppDelegate.h: @interface AppDelegate_Pad : NSObject <UIApplicationDelegate, LoginViewControllerDelegate> { UIWindow *window; UITabBarController *tabBarController; } @property (nonatomic, retain) IBOutlet UIWindow *window; @property (nonatomic, retain) IBOutlet UITabBarController *tabBarController; @end AppDelegate.m: @implementation AppDelegate_Pad @synthesize window; @synthesize tabBarController; - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { LoginViewController_Pad *lvc = [[LoginViewController_Pad alloc] initWithNibName:@"LoginViewController_Pad" bundle:nil]; lvc.delegate = self; [window addSubview:lvc.view]; //[lvc release]; [window makeKeyAndVisible]; return YES; } - (void)loginViewControllerDidFinish:(LoginViewController_Pad *)loginViewController { [window addSubview:tabBarController.view]; } - (void)dealloc {...} @end LoginViewController_Pad.h: @protocol LoginViewControllerDelegate; @interface LoginViewController_Pad : UIViewController { id<LoginViewControllerDelegate> delegate; } @property (nonatomic, assign) id <LoginViewControllerDelegate> delegate; - (IBAction)buttonPressed; @end @protocol LoginViewControllerDelegate -(void)loginViewControllerDidFinish:(LoginViewController_Pad *)loginViewController; @end LoginViewController_Pad.m: @implementation LoginViewController_Pad @synthesize delegate; ... - (IBAction)buttonPressed { [self.view removeFromSuperview]; [self.delegate loginViewControllerDidFinish:self]; } ... @end So the app delegate adds the login view controller's view on launch and waits for login to call "did finish" using a delegate. The login view controller calls removeFromSuperView before it calls didFinish. The app delegate then calls addSubView on the tab bar controller's view. If you made it up to this point, thanks, and I have three questions: MAIN QUESTION: Is this the right way to show a view controller before the app's main tab bar controller is displayed? Even though it seems to work, is it a proper way to do it? If I comment out the "lvc release" in the app delegate then the app crashes with EXC_BAD_ACCESS when the button on the login view controller is pressed. Why? With the "lvc release" commented out everything seems to work but on the debugger console it writes this message when the app delegate calls addSubView for the tab bar controller: Using two-stage rotation animation. To use the smoother single-stage animation, this application must remove two-stage method implementations. What does that mean and do I need to worry about it?

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  • Problem with the scrollbar of a UIWebView

    - by Paulo Ferreira
    Hi there! Im using a UIWebView to access a website, when i rotate the phone (landscape) the UIWebView is properly resized and the scrollbar are on the right place (on the right edge...) but when i acess any of input fields to fill the information required and exit it the UIWebView scrollbar jumps to the middle of screen (looks like it get back to 320, the width of the screen on portrait). Some useful info, this program was created using IB, have lots of outlets, im thinking about in do (redo) everything programmatically cause i was not the author of the first version... If anyone have seen this before plz let me know.. Thanks in advance!

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  • Object allocations in the cellForRowAtIndexPath method is increasing? Is dealloc not called in prese

    - by Madan Mohan
    Hi Guys, This is PresentModelViewController, when click a button i will get this "DoctorListViewController" controller from down. object allocation are not releasing in this controller specially in cellForRowAtIndexPath delegate method. UITableViewCell and two labels allocated in this is not releasing. In the previous view The allocation count of this " UITableViewCell and two labels" is increasing.Also the dealloc method in this view controller is not called when I dismiss the modelviewcontrller, that is way I have released in the close method. please suggest me a right solution Thank you. import "DoctorListViewController.h" @implementation DoctorListViewController @synthesize doctorList; - (id)init { if (self = [super init]) { self.title=@"Doctors List"; UIView *myView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]]; myView.autoresizingMask=YES; [myView setBackgroundColor:[UIColor groupTableViewBackgroundColor]]; myTableView=nil; myTableView = [[UITableView alloc]initWithFrame:CGRectMake(0,0,320,420) style:UITableViewStylePlain]; myTableView.delegate = self; myTableView.dataSource=self; [myTableView setSectionFooterHeight:5]; [myTableView setSectionHeaderHeight:15]; [myTableView setSeparatorColor:[UIColor greenColor]]; [myView addSubview: myTableView]; UIBarButtonItem *addButton = [[UIBarButtonItem alloc]initWithTitle:@"Close" style:UIBarButtonItemStyleBordered target:self action:@selector(closeAction)]; self.navigationItem.leftBarButtonItem = addButton; [addButton release]; self.view = myView; [myView release]; } return self; } -(void)viewWillAppear:(BOOL)animated { DoctorsAppDelegate *appDelegate = (DoctorsAppDelegate *) [ [UIApplication sharedApplication] delegate]; [self setToPortrait:appDelegate.isPortrait]; } -(void)setToPortrait:(BOOL)isPortrait { if(isPortrait == YES) { printf("\n hai i am in setToPortrait method"); [self shouldAutorotateToInterfaceOrientation:UIInterfaceOrientationPortrait]; } } -(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { DoctorsAppDelegate *appDelegate = (DoctorsAppDelegate *) [ [UIApplication sharedApplication] delegate]; if(interfaceOrientation == UIInterfaceOrientationLandscapeLeft || interfaceOrientation == UIInterfaceOrientationLandscapeRight ) { myTableView.frame=CGRectMake(0,0,480,265); appDelegate.isPortrait=NO; } else if(interfaceOrientation == UIInterfaceOrientationPortrait) { myTableView.frame=CGRectMake(0,0,320,415); appDelegate.isPortrait=YES; } return YES; } -(void)closeAction { printf("\n hai i am in close action*****************"); [doctorList release]; [myTableView release]; myTableView=nil; printf("\n myTableView retainCount :%d",[myTableView retainCount]); [[self navigationController] dismissModalViewControllerAnimated:YES]; } pragma mark methods for dataSource and delegate (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return 1; } (NSInteger)tableView:(UITableView )tableView numberOfRowsInSection:(NSInteger)section { / int numberOfRows = [doctorList count]; if(numberOfRows =[doctorList count]){ numberOfRows++; } return numberOfRows; */ return [doctorList count]; } (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { return 50; } (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell = (UITableViewCell *)[myTableView dequeueReusableCellWithIdentifier:@"MyIdentifier"]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:@"MyIdentifier"]autorelease]; UIView* elementView = [ [UIView alloc] initWithFrame:CGRectMake(5,5,300,480)]; elementView.tag = 0; [cell.contentView addSubview:elementView]; [elementView release]; } UIView* elementView = [cell.contentView viewWithTag:0]; for(UIView* subView in elementView.subviews) { [subView removeFromSuperview]; } if(indexPath.row != [doctorList count]) { cell.accessoryType=UITableViewCellAccessoryDisclosureIndicator; Doctor *obj= [doctorList objectAtIndex:indexPath.row]; UILabel *firstNameLabel =[[[UILabel alloc] initWithFrame:CGRectMake(5,2,300,15)]autorelease]; [firstNameLabel setFont:[UIFont boldSystemFontOfSize:12]]; firstNameLabel.textColor = [UIColor blackColor]; firstNameLabel.textColor =[UIColor blackColor]; firstNameLabel.numberOfLines = 0; firstNameLabel.tag=1; firstNameLabel.backgroundColor = [UIColor clearColor]; NSString *str=obj.firstName; str=[str stringByAppendingString:@" "]; str=[str stringByAppendingString:obj.lastName]; firstNameLabel.text=str; [elementView addSubview:firstNameLabel]; //[firstNameLabel release]; firstNameLabel=nil; UILabel *streetLabel =[[[UILabel alloc] initWithFrame:CGRectMake(5,20,300,15)]autorelease]; [streetLabel setFont:[UIFont systemFontOfSize:12]]; streetLabel.textColor = [UIColor blackColor]; streetLabel.numberOfLines = 0; streetLabel.tag=2; streetLabel.backgroundColor = [UIColor clearColor]; streetLabel.text=obj.streetAddress; [elementView addSubview:streetLabel]; //[streetLabel release]; streetLabel=nil; printf("\n retainCount count of firstNameLabel %d",[firstNameLabel retainCount]); printf("\n retainCount count of streetLabel %d",[streetLabel retainCount]); printf("\n retainCount count of cell %d",[cell retainCount]); } return cell; } (void )tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { [myTableView deselectRowAtIndexPath:indexPath animated:YES]; DoctorDetailsViewController *doctorDetailsViewController=[[DoctorDetailsViewController alloc]init]; Doctor *obj= [doctorList objectAtIndex:indexPath.row]; BOOL isList=YES; doctorDetailsViewController.isList=isList; doctorDetailsViewController.doctorObj=obj; [[self navigationController] pushViewController:doctorDetailsViewController animated:YES]; [doctorDetailsViewController release]; } (void)didReceiveMemoryWarning { // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use. } (void)dealloc { printf("\n hai i am in dealloc of Doctor list view contrller"); //[doctorList release]; //[myTableView release]; [super dealloc]; } @end

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  • strange problem when placing UILabels on UITableView and calling reloadData

    - by user262325
    Hello everyone I hope to list all files in a directory to an UITableView atableview There are files in Document directory a.txt b.txt F (folder) c.txt in folder F, there are 2 files M.exe N.exe When I change to folder F, it should display on atableview M.exe N.exe but Result is in F, it displayed b.txt F the codes are shown as below -(void) removeACell:(NSInteger)row; { NSUInteger _lastSection = 0;//[self numberOfSectionsInTableView:atableview]; NSUInteger _lastRow =row;// [atableview numberOfRowsInSection:_lastSection] - 1; NSUInteger _path[2] = {_lastSection, _lastRow}; NSIndexPath *_indexPath = [[NSIndexPath alloc] initWithIndexes:_path length:2]; NSArray *_indexPaths = [[NSArray alloc] initWithObjects:_indexPath, nil]; [_indexPath release]; [atableview deleteRowsAtIndexPaths:_indexPaths withRowAnimation:UITableViewRowAnimationBottom]; [_indexPaths release]; } -(void) reloadDirectory { if([fileArray count]>0) { NSInteger n=fileArray.count; for(int i=n-1;i>=0;i--) { [fileArray removeObjectAtIndex: i]; [self removeACell:i]; } } NSFileManager *manager = [NSFileManager defaultManager]; NSLog(@"*******************" ); NSLog(@"ffff%@",[self appDelegate].gCurrentPath_AppDelegate); for(NSString *path in [manager contentsOfDirectoryAtPath:[self appDelegate].gCurrentPath_AppDelegate error:nil]) { NSDictionary *modData= [manager attributesOfItemAtPath: [appDelegate.gCurrentPath_AppDelegate //directory of files stringByAppendingPathComponent:path ] error:nil ]; NSDate * dateModified=(NSDate *) [modData objectForKey:NSFileModificationDate]; NSNumber *fileSize=[modData objectForKey:NSFileSize] ; if(dateModified) { FileObj *newobj=[[FileObj alloc] init ]; [ newobj seta:1]; NSString *ss=[[NSString alloc] initWithFormat:@"%@",path] ; [newobj setfileName:ss]; NSLog(@"---------------%@",ss); BOOL isDir; [manager fileExistsAtPath:[appDelegate.gCurrentPath_AppDelegate stringByAppendingPathComponent:path ] isDirectory:&isDir]; [newobj setisDirectory: isDir ]; [newobj setfilePath:@"1"]; NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setDateFormat:@"EEE MMM dd HH:mm:ss zzz yyyy"]; NSString *stringFromDate =[[NSString alloc] initWithString: [formatter stringFromDate:dateModified]]; [newobj setfileDate:stringFromDate]; [formatter release]; NSString * fileSize1= [[NSString alloc] initWithFormat:@"%d",[fileSize integerValue] ]; [newobj setfileSize: fileSize1]; [ fileArray addObject:newobj]; [newobj release]; }; [atableview reloadData]; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { NSInteger row=[indexPath row]; NSInteger section=[indexPath section]; static NSString *SimpleTableIdentifier1 = @"CellTableIdentifier"; UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier: SimpleTableIdentifier1 ]; int newRow = [indexPath row]; selectIndex=newRow; if(cell==nil) { //**breakpoint AAA here** CGRect cellframe=CGRectMake(0, 0, 300, 60); cell=[[[UITableViewCell alloc] initWithFrame:cellframe reuseIdentifier:SimpleTableIdentifier1] autorelease]; if ([[fileArray objectAtIndex:row] getisDirectory]) { UIImage *image = [UIImage imageNamed:@"folder.png"]; cell.imageView.image = image; } else { UIImage *image = [UIImage imageNamed:@"files.png"]; cell.imageView.image = image; } cell.accessoryType=UITableViewCellAccessoryDetailDisclosureButton; ///-------------------------------------------------------- UILabel *b1 =[ [UILabel alloc]init]; b1.frame = CGRectMake(40.9f,8.0f,250.0f,20.0f) ; [b1 setBackgroundColor:[UIColor clearColor]]; [b1 setTag:(row+15000)]; //------------------------------------------------------- UILabel *b2 =[ [UILabel alloc]init]; b2.frame = CGRectMake(40.9f,30.0f,250.0f,13.0f) ; [b2 setBackgroundColor:[UIColor clearColor]]; [b2 setTag:row+16000]; [b2 setFont:[UIFont systemFontOfSize:10.0]]; //------------------------------------------------ UILabel *b3 =[ [UILabel alloc]init]; b3.frame = CGRectMake(40.9f,45.0f,250.0f,13.0f) ; [b3 setBackgroundColor:[UIColor clearColor]]; [b3 setFont:[UIFont systemFontOfSize:10.0]]; [b3 setTag:row+17000]; [cell.contentView addSubview:b1]; [cell.contentView addSubview:b2]; [cell.contentView addSubview:b3]; [b1 release]; [b2 release]; [b3 release]; }; if([fileArray count]>0) //check if fileArray is correct { NSLog(@"___________________" ); for (int i=0;i<[fileArray count];i++) { NSLog(@"->%@",[[fileArray objectAtIndex:i] getfileName] ); } } UILabel *tem1UILabel=(UILabel*)[cell.contentView viewWithTag:row+15000]; NSString *s1=[[NSString alloc] initWithFormat: [[fileArray objectAtIndex:row] getfileName] ]; NSLog(@"--->%@",s1 ); tem1UILabel.text=s1; [s1 release]; UILabel *tem2UILabel=(UILabel*)[cell.contentView viewWithTag:row+16000]; NSString *s2=[[NSString alloc] initWithFormat: [[fileArray objectAtIndex:row] getfileDate] ]; tem2UILabel.text=s2; [s2 release]; UILabel *tem3UILabel=(UILabel*)[cell.contentView viewWithTag:row+17000]; NSString *s3=[[NSString alloc] initWithFormat: [[fileArray objectAtIndex:row] getfileSize]]; tem3UILabel.text=s3; [s3 release]; return cell; } I set the breakpoint at AAA and found that when I loaded folder F, my application did stop at the breakpoint. But I have removed all cells in atableview before call 'reloadData'. I checked the content of fileArray which is the data source of atableview and found that everything is correct except the display on atableview. Welcome any comment. Thanks interdev

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  • How do I force one method to be executed before another method?

    - by RexOnRoids
    I've got 2 methods. One method starts playing an audio file (.mp3), the other method updates a UIToolBar to show a button (PLAY or PAUSE). These two methods are called in the following order: //Adds some UIBarButtonItems to a UIToolBar [self togglePlayer]; //Uses AVAudioPlayer [audioPlayer play]; I call the methods in the above order so that the (pause) button will be shown at the time the song starts playing. But, the problem is that the song starts playing first, and the UIToolBar remains unchanged for quite a while (from 2 to 5 secs) until the button is added and shown. What I want is for the button to be shown at the same time the song starts playing (i.e. NO DELAY). Is there any way to do this?

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  • Telling a UITextField to become first responder while embedded in a UITableViewCell

    - by Jasarien
    I have a UITextField that is a subview of a UITableViewCell. When my view loads, I want the text field to become first responder. I have a pointer to the text field in the table cell, so to do this I am trying: [myTextField becomeFirstResponder]; This returns NO all the time, regardless of when it's called, which according to the docs means the text field refused to become first responder... What am I doing wrong? Edit: The text field properly responds to being touched. It bring up the keyboard then. It's only when telling it to become first responder programmatically that the problem happens.

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  • UISwitch within UIScrollview nearly impossible to use....

    - by samsam
    Hi there. I'm using a UISwitch-Component at the bottom of a view that sits within a UIScrollView. Now the problem that appeared, is that the switch is nearly impossible to swipe because the UIScrollView seems to dominate the userinput. Switching works very well by tapping the switch, but from my point of view, most users "switch" the UISwitch instead of tapping. Did anyone of you face the same / or similar problems and managed to come up with a solution? thx in advance sam

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  • timeIntervalSinceDate Accuracy

    - by mmccomb
    I've been working on a game with an engine that updates 20 times per seconds. I've got to point now where I want to start getting some performance figures and tweak the rendering and logic updates. In order to do so I started to add some timing code to my game loop, implemented as follows... NSDate* startTime = [NSDate date]; // Game update logic here.... // Also timing of smaller internal events NSDate* endTime = [NSDate date]; [endTime timeIntervalSinceDate:startTime]; I noticed however that when I timed blocks within the outer timing logic that the time they took to execute did not sum up to match the overall time taken. So I wrote a small unit test to demonstrate the problem in which I time the overall time taken to complete the test and then 10 smaller events, here it is... - (void)testThatSumOfTimingsMatchesOverallTiming { NSDate* startOfOverallTime = [NSDate date]; // Variable to hold summation of smaller timing events in the upcoming loop... float sumOfIndividualTimes = 0.0; NSTimeInterval times[10] = {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0}; for (int i = 0; i < 10; i++) { NSDate* startOfIndividualTime = [NSDate date]; // Kill some time... sleep(1); NSDate* endOfIndividualTime = [NSDate date]; times[i] = [endOfIndividualTime timeIntervalSinceDate:startOfIndividualTime]; sumOfIndividualTimes += times[i]; } NSDate* endOfOverallTime = [NSDate date]; NSTimeInterval overallTimeTaken = [endOfOverallTime timeIntervalSinceDate:startOfOverallTime]; NSLog(@"Sum of individual times: %fms", sumOfIndividualTimes); NSLog(@"Overall time: %fms", overallTimeTaken); STAssertFalse(TRUE, @""); } And here's the output... Sum of individual times: 10.001377ms Overall time: 10.016834ms Which illustrates my problem quite clearly. The overall time was 0.000012ms but the smaller events took only 0.000001ms. So what happened to the other 0.000011ms? Is there anything that looks particularly wrong with my code? Or is there an alternative timing mechanism I should use?

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  • OutOfMemoryError what to increase and how?

    - by Pentium10
    I have a really long collection with 10k items, and when running a toString() on the object it crashes. I need to use this output somehow. 05-21 12:59:44.586: ERROR/dalvikvm-heap(6415): Out of memory on a 847610-byte allocation. 05-21 12:59:44.636: ERROR/dalvikvm(6415): Out of memory: Heap Size=15559KB, Allocated=12932KB, Bitmap Size=613KB 05-21 12:59:44.636: ERROR/AndroidRuntime(6415): Uncaught handler: thread main exiting due to uncaught exception 05-21 12:59:44.636: ERROR/AndroidRuntime(6415): java.lang.OutOfMemoryError 05-21 12:59:44.636: ERROR/AndroidRuntime(6415): at java.lang.AbstractStringBuilder.enlargeBuffer(AbstractStringBuilder.java:97) 05-21 12:59:44.636: ERROR/AndroidRuntime(6415): at java.lang.AbstractStringBuilder.append0(AbstractStringBuilder.java:155) 05-21 12:59:44.636: ERROR/AndroidRuntime(6415): at java.lang.StringBuilder.append(StringBuilder.java:202) 05-21 12:59:44.636: ERROR/AndroidRuntime(6415): at java.util.AbstractCollection.toString(AbstractCollection.java:384) I need step by step guide how to increase the heap for and Android application. I don't run the command line.

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  • Using Mapping Models to migrate between Core Data Object Models

    - by westsider
    I have a fairly simply scheme. Essentially, Run <-- Data (where a Run holds a data, e.g., Temperature, sampled from some sort of sensor). Now, it seems that sensors can have more than one measurement (e.g., Temperature and Humidity). So, a single Run could have multiple data samples. Hence, Run <-- Sample and Sample <-- Data. (And for simplicity I am leaving Run <-- Data in place, for now.) If I create a new mapping model, then things generally work - except that no new Samples are created, no relationships are established between Runs and Samples nor between Samples and Datas. I am trying to get mapping model to migrate my model but even the slightest change to the generated mapping model results in Cocoa error 134110. For example, if I take the "Sample" mapping (which has no Source) and set its Source to 'Run' (so that I can set Sample's inverse relationship 'run' appropriately) then the mapping changes its name to "RunToSample". There are two relationships handled in this mapping: data and run. The data property gets set automatically to FUNCTION($manager, "destinationInstancesForEntityMappingNamed:sourceInstances:" , "DataToData", $source.dataSet) Following this example, I set the run property to FUNCTION($manager, "destinationInstancesForEntityMappingNamed:sourceInstances:" , "RunToRun", $source) Similarly, I set the 'sample' property mapping in RunToRun to FUNCTION($manager, "destinationInstancesForEntityMappingNamed:sourceInstances:" , "RunToSample", $source) and the 'sample' property in DataToData to FUNCTION($manager, "destinationInstancesForEntityMappingNamed:sourceInstances:" , "RunToSample", $source.run) So, what, I wonder, is going wrong? I have tried various permutations, such as leaving the 'inverse' relationships unspecified. But I continue to get the same error (134110) regardless. I imagine that this is a lot easier than it seems and that I am missing some fundamental but minor piece. I have also tried subclassing NSEntityMigrationPolicy and overriding -createDestinationInstancesForSourceInstance: but these efforts have met with much the same results. Thanks in advance for any pointers or (relevant :-) advice.

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  • How to set up a user Quartz2D coordinate system with scaling that avoids fuzzy drawing?

    - by jdmuys
    This topic has been scratched once or twice, but I am still puzzled. And Google was not friendly either. Since Quartz allows for arbitrary coordinate systems using affine transform, I want to be able to draw things such as floorplans using real-life coordinate, e.g. feet. So basically, for the sake of an example, I want to scale the view so that when I draw a 10x10 rectangle (think a 1-inch box for example), I get a 60x60 pixels rectangle. It works, except the rectangle I get is quite fuzzy. Another question here got an answer that explains why. However, I'm not sure I understood that reason why, and moreover, I don't know how to fix it. Here is my code: I set my coordinate system in my awakeFromNib custom view method: - (void) awakeFromNib { CGAffineTransform scale = CGAffineTransformMakeScale(6.0, 6.0); self.transform = scale; } And here is my draw routine: - (void)drawRect:(CGRect)rect { CGContextRef context = UIGraphicsGetCurrentContext(); CGRect r = CGRectMake(10., 10., 11., 11.); CGFloat lineWidth = 1.0; CGContextStrokeRectWithWidth(context, r, lineWidth); } The square I get is scaled just fine, but totally fuzzy. Playing with lineWidth doesn't help: when lineWidth is set smaller, it gets lighter, but not crisper. So is there a way to set up a view to have a scaled coordinate system, so that I can use my domain coordinates? Or should I go back and implementing scaling in my drawing routines? Note that this issue doesn't occur for translation or rotation. Thanks

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  • Odd background image resizing on animating UIView

    - by Woody
    I have a UIView in the middle of a view that I am using as a game playing area (in a 2d cocoa view). This image has a background image of the same size as the view. Resizing the view I use animation to make it look smooth (and that works fine). However, when the animation starts, the background image immediately changes size, tiling or being clipped to a size that when the animation finishes, the background image is physically the same size. I don't want this, I want the image to always fit the view, regardless of the view size. UIImage *bgImage = [UIImage imageNamed:@"head.png"]; ... // resize the image returning another image self.view.backgroundColor = [[UIColor alloc] initWithPatternImage:resizedImage]; [UIView beginAnimations:@"resizeView" context:nil]; [UIView setAnimationDuration:.5]; int localViewSize = ... // work out view sizes self.view.frame = CGRectMake(... ,localViewSize,localViewSize); [UIView commitAnimations]; It looks very odd as it jumps to a different size, then animates to the original size. I am guessing that maybe I would have to make a separate view underneath my main view but is that the only way?

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  • UIScrollView ImageView with pins on top

    - by Koppo
    To all, I have a UIScrollView which has a UIImageView. I want to show pins on this imageView. When I add pins as subviews of the ImageView everything is great except for when you zoom the scale transform happens on the pins also. I don't want this behavior and want my pins to stay the same. So I choose to add the Pins to another view which sits on top of the ImageView and is also a subview of the UIScrollView. The idea here if you will imagine is to have a layer which hovers over the map and won't scale yet show pins over where I plot them. The pin when added to the layer view don't cale if the ImageView scales. However the issue then bceomes the position of the pins doesn't match the original origin x/y as the ImageView has had a scale transform. Basically this is a custom map of a place with Pins. I am trying to have the Pins float over and not zoom in and out over my ImageView yet remember where I placed them when the zoom happens. Some code scrollView = [[UIScrollView alloc] initWithFrame:viewRect]; scrollView.delegate = self; scrollView.pagingEnabled = NO; scrollView.scrollsToTop = NO; [scrollView setBackgroundColor:[UIColor clearColor]]; scrollView.clipsToBounds = YES; // default is NO, we want to restrict drawing within our scrollview scrollView.bounces = YES; scrollView.autoresizingMask = UIViewAutoresizingFlexibleHeight; scrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite; imageViewMap = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"image.png"]]; imageViewMap.userInteractionEnabled = YES; viewRect = CGRectMake(0,0,imageViewMap.image.size.width,imageViewMap.image.size.height); //viewRect = CGRectMake(0,0,2976,3928); [scrollView addSubview:imageViewMap]; [scrollView setContentSize:CGSizeMake(viewRect.size.width, viewRect.size.height)]; iconsView = [[UIView alloc] initWithFrame:imageViewMap.frame]; [scrollView addSubview:iconsView]; Code to add Pin later on some event. [iconsView addSubview:pinIcon]; I am stuck in trying tp figure out how to to get my pins to hover on the map without moving when the scale happens. Thanks

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  • UILabel over a UIToolBar

    - by paul simmons
    Hi, I have put a UILabel over a UIToolbar. It works fine (changing colors & text) but when I click something on the toolbar, from that moment on, UILabel's text color is like 'faded'. I have tried bringing UILabel to front but that did not work. Any suggestions?.

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  • JQTouch transition problem

    - by sukk1e
    I have a problem with the jqtouch bottom toolbar. Its a stationary bottom toolbar that is implemented with the iScroll plugin for jqtouch. When I want to switch between a page with a "right" slide transition effect I want to exclude the bottombar from also using the transition effect. The reason for this is because it looks weird when the bottom toolbar slides to the right.

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  • UINavigationController placement problem

    - by Chonch
    Hey, I'm having this problem and I can't seem to figure out why! I want to use a UINavigationController, but I don't want to use it through out the entire application. So, in the UIViewController I was to add it to, I define: UINavigationController *navigationController; and the @property, @synthesize and dealloc. In the viewDidLoad method, I add: navigationController = [[UINavigationController alloc] init]; navigationController.navigationBar.barStyle = UIBarStyleBlack; and when the relevant UIViewController is loaded, I add: [navigationController pushViewController:viewController animated:NO]; and make the old view disappear and the UINavigationController's view to appear. Everything works fine except that the navigation bar appears about 20pixels too low (dragging the entire view down and out of the screen). If I set the UINavigationController's view frame parameter manually to start at 0,0, it jumps there, but only after about a second, so that you can see the navigation bar starting at a certain location and only then jumping to another (and it is ugly!). I have done the exact same thing in the past and had no problem with it. Does anyone know what may cause this? Thanks,

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