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  • Best way to organize MATLAB classes?

    - by jjkparker
    MATLAB has two ways of organizing classes: @-directories: @ClassName\ ClassName.m Method1.m Method2.m Single files: ClassName.m: classdef ClassName methods % all methods included here end end The first style existed before the new classdef syntax, but seems to be a more structured way of doing things. The second style (everything in a single file) is new. Which method do you use, and why?

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  • Essential topics to be discussed in Linux 101

    - by zengr
    Hi, We are organizing a Linux 101 Workshop for undergrad and grad students. Can you share some ideas/topics that are must for people who are just starting with Linux. Preconditions: No knowledge of Linux OS, philosophy and technical aspects (kernel, shell, commands) Post conditions: A basic crash course of Linux which will give them a good start and answer some basic questions asked on it.

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  • Repository organization for Hadoop project

    - by Alex N.
    I am starting on a new Hadoop project that will have multiple hadoop jobs(and hence multiple jar files). Using mercurial for source control, I was wondering what would be optimal way of organizing the repository structure? Should each job live in separate repo or would it be more efficient to keep them in the same, but break down into folders?

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  • Folders without Namespaces C#, .Net, VS 2008

    - by Joel
    I'm working on an ASP.NET webapp using the MVP pattern, and as I'm organizing my files I'm wondering - are there conventions on folders within projects and how they relate to namespaces? I have a bunch of controls and a bunch of pages, and I was going to throw them into Controls and Pages folders with subfolders, but I didn't know if it was bad form to do this if I wasn't also going to seperate them out into namespaces. Thanks.

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  • Lua and C++: separation of duties

    - by topright
    Please hel to classify ways of organizing C++/Lua game code and to separate their duties. What are the most convenient ways, which one do you use? For example, Lua can be used for initializing C++ objects only or at every game loop iteration. It can be used for game logic only or for graphics, too. Thank you.

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  • What is the best way to organize object oriented code?

    - by Adam
    I haven't coded in java for a long time, and after coding in C, I'm having issued organizing my code for OOP. More specifically I'm not sure when to create a new method, and when to create a new class, and when to just lump everything together. Are there some general rules or guidelines on how it should be done?

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  • how to organize all JQuery scripts

    - by Abu Hamzah
    i am using half dozen jquery plugins and plus my own jquery scripts and in every script i have this code: $(document).ready(function() { .... } what is the best way of organizing all the scripts in one centeralized location and instead of having multiple times $(document).ready(function() everywhere in the script. thoughts?

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  • Getting all database entries into organized array

    - by Industrial
    Hi everyone, I have just made the update/add/delete part for the "Closure table" way of organizing query hierarchical data that are shown on page 70 in this slideshare: http://www.slideshare.net/billkarwin/sql-antipatterns-strike-back However, I have a bit of an issue getting the full tree back as an multidimensional array from a single query. Here's what I would like to get back: array ( 'topvalue' = array ( 'Subvalue', 'Subvalue2', 'Subvalue3' = array ('Subvalue 1', 'Subvalue 2', 'Subvalue 3' ) ); );

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  • Leading a Developer Meeting?

    - by hypoxide
    I've recently inherited responsibility for organizing and running the hour long monthly developer meetings at my office. I've only been out of college for 2 years so I'm kind of intimidated by holding the reins for this type of thing. The group is composed of about 20 developers, more than half of which are significantly more senior than I am. I need some tips on how to make this meeting valuable for everybody, as well as any possible advice/consolation/condolences you can give me.

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  • Core Data managed object context thread synchronisation

    - by Ben Reeves
    I'm have an issue where i'm updating a many-to-many relationship in a background thread, which works fine in that threa, but when I send the object back to the main thread the changes do not show. If I close the app and reopen the data is saved fine and the changes show on the main thread. Also using [context lock] instead of a different managed object context works fine. I have tried NSManagedObjectContext: - (BOOL)save:(NSError **)error; - (void)refreshObject:(NSManagedObject *)object mergeChanges:(BOOL)flag; at different stages throughout the process but it doesn't seem to help. My core data code uses the following getter to ensure any operations are thread safe: - (NSManagedObjectContext *) managedObjectContext { NSThread * thisThread = [NSThread currentThread]; if (thisThread == [NSThread mainThread]) { //Main thread just return default context return managedObjectContext; } else { //Thread safe trickery NSManagedObjectContext * threadManagedObjectContext = [[thisThread threadDictionary] objectForKey:CONTEXT_KEY]; if (threadManagedObjectContext == nil) { threadManagedObjectContext = [[[NSManagedObjectContext alloc] init] autorelease]; [threadManagedObjectContext setPersistentStoreCoordinator: [self persistentStoreCoordinator]]; [[thisThread threadDictionary] setObject:threadManagedObjectContext forKey:CONTEXT_KEY]; } return threadManagedObjectContext; } } and when I pass object between threads i'm using -(NSManagedObject*)makeSafe:(NSManagedObject*)object { if ([object managedObjectContext] != [self managedObjectContext]) { NSError * error = nil; object = [[self managedObjectContext] existingObjectWithID:[object objectID] error:&error]; if (error) { NSLog(@"Error makeSafe: %@", error); } } return object; } Any help appreciated

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  • Objective-C SSL Synchronous Connection

    - by Mike
    Hello, I'm a little new to objective-C but have run across a problem that I can't solve, mostly because I'm not sure I am implementing the solution correctly. I am trying to connect using a Synchronous Connection to a https site with a self-signed certificate. I am getting the Error Domain=NSURLErrorDomain Code=-1202 "untrusted server certificate" Error that I have seen some solutions to on this forum. The solution i found was to add: - (BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace { return [protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]; } (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge { [challenge.sender useCredential:[NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust] forAuthenticationChallenge:challenge]; } to the NSURLDelegate to accept all certificates. When I connect to the site using just a: NSURLRequest *theRequest=[NSURLRequest requestWithURL:[NSURL URLWithString:@"https://examplesite.com/"] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0]; NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self]; It works fine and I see the challenge being accepted. However when I try to connect using the synchronous connection I still get the error and I don't see the challenge functions being called when I put in logging. How can I get the synchronous connection to use the challenge methods? Is it something to do with the delegate:self part of the URLConnection? I also have logging for sending/receiving data within the NSURLDelegate that is called by my connection function but not by the synchronous function. What I am using for the synchronous part: NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL: [NSURL URLWithString:@"https://examplesite.com/"]]; [request setHTTPMethod: @"POST"]; [request setHTTPBody: [[NSString stringWithString:@"username=mike"] dataUsingEncoding: NSUTF8StringEncoding]]; dataReply = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error]; NSLog(@"%@", error); stringReply = [[NSString alloc] initWithData:dataReply encoding:NSUTF8StringEncoding]; NSLog(@"%@", stringReply); [stringReply release]; NSLog(@"Done"); Like I mentioned I'm a little new to objective C so be kind :) Thanks for any help. Mike

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  • UITextField resignFirstResponder not working?

    - by Tejaswi Yerukalapudi
    I've double checked all the connections in the nib file. My code - // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { self.view.backgroundColor = [[UIColor alloc] initWithPatternImage:[UIImage imageNamed:@"iphone_bg_login.png"]]; self.title = @"Login screen"; loginTxt = [[UITextField alloc] init]; pwdText = [[UITextField alloc] init]; loginFailedTxt = [[UILabel alloc] init]; loginBtn = [[UIButton alloc] init]; navAppDelegate = (NavAppDelegate *)[[UIApplication sharedApplication] delegate]; navAppDelegate.navController.navigationBarHidden = YES; //NSArray *subVs = (NSArray *) [self.view subviews]; [super viewDidLoad]; } I've used a subclass of UIView (UIControl) and added all the UI elements to it in the Interface builder.The UIControl's touchDown method is connected to backgroundTap method. -(IBAction) backgroundTap:(id) sender { [loginTxt resignFirstResponder]; [pwdText resignFirstResponder]; //[[UIApplication sharedApplication] becomeFirstResponder]; //[sender resignFirstResponder]; } So the keyboard isn't removed like it's supposed to. Not sure why. Thanks for the help! Teja.

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  • iPhone UIScrollview with UIButtons - how to recreate springboard?

    - by Patrick
    I'm trying to create a springboard-like interface within my app. I'm trying to use UIButtons added to a UIScrollView. The problem I'm running in to is with the buttons not passing any touches to the UIScrollView - if I try to flick/slide and happen to press on the button it doesn't register for the UIScrollView, but if I flick the space between buttons it will work. The buttons do click/work if I touch them. Is there a property or setting that forces the button to send the touch events up to its parent (superview)? Do the buttons need to be added to something else before being added the UIScrollView? Here is my code: //init scrolling area UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 480, 480)]; scrollView.contentSize = CGSizeMake(480, 1000); scrollView.bounces = NO; scrollView.delaysContentTouches = NO; //create background image UIImageView *rowsBackground = [[UIImageView alloc] initWithImage:[self scaleAndRotateImage:[UIImage imageNamed:@"mylongbackground.png"]]]; rowsBackground.userInteractionEnabled = YES; //create button UIButton *btn = [[UIButton buttonWithType:UIButtonTypeCustom] retain]; btn.frame = CGRectMake(100, 850, 150, 150); btn.bounds = CGRectMake(0, 0, 150.0, 150.0); [btn setImage:[self scaleAndRotateImage:[UIImage imageNamed:@"basicbutton.png"]] forState:UIControlStateNormal]; [btn addTarget:self action:@selector(buttonClick) forControlEvents:UIControlEventTouchUpInside]; //add "stuff" to scrolling area [scrollView addSubview:rowsBackground]; [scrollView addSubview:btn]; //add scrolling area to cocos2d //this is just a UIWindow [[[Director sharedDirector] openGLView] addSubview:scrollView]; //mem-mgmt [rowsBackground release]; [btn release]; [scrollView release];

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  • Getting data from UITableView

    - by Tejaswi Yerukalapudi
    Hi, I have a few custom UITableViewCells - http://img11.imageshack.us/i/customfacilitiescell.png/ which are added to this UIViewController - http://img189.imageshack.us/i/facilitycontroller.png/ Now, on clicking a button in the controller, I'd like to get the on/off status of all the UISwitches in the controller. Thanks, Teja Edit: I've made a few edits, but I still can't figure out how to do this. My program structure currently - A CustomCell.xib that looks like this - http://img11.imageshack.us/i/customfacilitiescell.png/ A CustomCellController that a subclass of UITableViewCell that has the IBOutlets for the labels and switches from above. Now I have a UIViewController<UITableViewDataSource, UITableViewDelegate> (Say, Screen1Controller) which looks like - http://img189.imageshack.us/i/facilitycontroller.png/ The tableviewcell is being created like this - - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *Id= @"CustomFacilitiesCell"; CustomFacilitiesCellController *cell = (CustomFacilitiesCellController *)[tableView dequeueReusableCellWithIdentifier:Id]; if(cell == nil) { NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"CustomFacilitiesCell" owner:self options:nil]; for (id oneObject in nib) { if([oneObject isKindOfClass:[CustomFacilitiesCellController class]]) cell = (CustomFacilitiesCellController *) oneObject; } } NSUInteger row = [indexPath row]; CustomFacilitiesCellController *rowData = (CustomFacilitiesCellController *)[self.facilities objectAtIndex:row]; cell.facname.text = rowData.facname.text; cell.FacID.text = rowData.FacID.text; cell.facSwitch = [(CustomFacilitiesCellController *)rowData facSwitch]; UISwitch *temp = cell.facSwitch; [(UISwitch *)[cell facSwitch] addTarget:self action:@selector(facSwitchOptionChanged:) forControlEvents:UIControlEventValueChanged]; cell.facSwitch.on = NO; //cell.facSwitch.enabled = FALSE; cell.accessoryType = UITableViewCellAccessoryNone; return cell; } - (IBAction) facSwitchOptionChanged:(id) sender { int i=0; } In particular, my problem is that the facSwitchOptionChanged() isn't getting called. Thanks again for the help, Teja.

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  • one more question on sqlite3 for iphone..sorry*

    - by summer
    let's say i am trying to save an image selected from photo library to database..is the following code correct? Snap.m - (void) addSnap { if(addStmt == nil) { const char *sql = "insert into Snap(snapTitle, snapDesc, snapImage) Values(?, ?, ?)"; if(sqlite3_prepare_v2(database, sql, -1, &addStmt, NULL) != SQLITE_OK) NSAssert1(0, @"Error while creating add statement. '%s'", sqlite3_errmsg(database)); } sqlite3_bind_text(addStmt, 1, [snapTitle UTF8String], -1, SQLITE_TRANSIENT);//bind titleSnap to insert statement sqlite3_bind_text(addStmt, 2, [snapDescription UTF8String], -2, SQLITE_TRANSIENT); sqlite3_bind_int(addStmt, 3, snapID); NSData *imgData = UIImagePNGRepresentation(self.snapImage); int returnValue = -1; if(self.snapImage != nil) returnValue = sqlite3_bind_blob(addStmt, 3, [imgData bytes], [imgData length], SQLITE_TRANSIENT); else returnValue = sqlite3_bind_blob(addStmt, 3, nil, -1, NULL); sqlite3_bind_int(addStmt, 4, snapID); if(returnValue != SQLITE_OK) NSLog(@"Not OK!!!"); if(SQLITE_DONE != sqlite3_step(addStmt))//execute step statement if it return SQLITE_DONE NSAssert1(0, @"Error while inserting data. '%s'", sqlite3_errmsg(database)); else //sqlite3_last_insert_rowid snapID = sqlite3_last_insert_rowid(database);//get primary key for the row which was inserted //reset add statement sqlite3_reset(addStmt); } - (void)setSnapImage:(UIImageView *)theSnapImage { self.isDirty = YES; [snapImage release]; snapImage = [theSnapImage copy]; } then to get the "object" i use.. snap2playObj.snapImage = imageView.image; i am using UIImageView by the way..my error message.. -[UIImage copyWithZone:]: unrecognized selector sent to instance 0xd74750 2010-03-18 16:22:27.808 Snap2Play[68317:20b] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* -[UIImage copyWithZone:]: unrecognized selector sent to instance 0xd74750'

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  • Add new item to UITableView and Core Data as data source?

    - by David.Chu.ca
    I have trouble to add new item to my table view with core data. Here is the brief logic in my codes. In my ViewController class, I have a button to trigle the edit mode: - (void) toggleEditing { UITableView *tv = (UITableView *)self.view; if (isEdit) // class level flag for editing { self.newEntity = [NSEntityDescription insertNewObjectForEntityName:@"entity1" inManagedObjectContext:managedObjectContext]; NSArray *insertIndexPaths = [NSArray arrayWithObjects: [NSInextPath indexPathForRow:0 inSection:0], nil]; // empty at beginning so hard code numbers here. [tv insertRowsAtIndexPaths:insertIndexPaths withRowAnimation:UITableViewRowAnimationFade]; [self.tableView setEditing:YES animated:YES]; // enable editing mode } else { ...} } In this block of codes, I added a new item to my current managed object context first, and then I added a new row to my tv. I think that both the number of objects in my data source or context and the number of rows in my table view should be 1. However, I got an exception in the event of tabView:numberOfRowsInSection: Invalid update: invalid number of rows in section 0. The number of rows contained in an existing section after the update (0) must be equal to the number of rows contained in that section before the update (0), plus or minus the number of rows inserted or deleted from that section (1 inserted, 0 deleted). The exception was raised right after the delegate event: - (NSInteger) tableView:(UITableView *) tableView numberOfRawsInSection:(NSInteger) section { // fetchedResultsController is class member var NSFetchedResultsController id <NSFechedResultsSectionInfo> sectionInfo = [[fetchedResultsController sections] objectAtIndex: section]; NSInteger rows = [sectionInfo numberOfObjects]; return rows; } In debug mode, I found that the rows was still 0 and the event invoked after the the even of toggleEditing. It looks like that sectionInfo obtained from fetchedResultsController did not include the new entity object inserted. Not sure if I miss anything or steps? I am not sure how it works: to get the fetcedResultsController notified or reflect the change when a new entity is inserted into the current managed object context?

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  • UISearchBar and UINavigationItem

    - by tbehunin
    I can't seem to get a UISearchBar to position itself from the far left to the far right in the navigation bar. In the -(void)viewDidLoad method, I have the following code: `UISearchBar *sb = [[UISearchBar alloc] initWithFrame:self.tableView.tableHeaderView.frame]; sb.delegate = self; self.navigationItem.titleView = sb; [sb sizeToFit]; [sb release];` When you build and run, it looks just fine at first glance. However, looking more closely, you can tell there is a margin/space on the left. This wouldn't be a big deal in the grand scheme of things, but when I tap the search bar to start a search, I animate the cancel button into view. Because the search bar is positioned slightly to the right, the animation is jerky and the cancel button falls off the end like so: link text It seems as if the UINavigationItem is like a table with three cells, where there is a padding on the first and last which I can't remove - nor does there seem to be a way to 'merge' it all together and then place the search bar there. I know this look is possible, because the AppStore search has a search bar in the navigation bar and it goes all the way to the edges. Anyone know how to get the search bar to go all the way to the edges so my slide-in cancel button animation will work properly?

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  • Mixing Objective-C and C++

    - by helixed
    Hello, I'm trying to mix together some Objective-C code with C++. I've always heard it was possible, but I've never actually tried it before. When I try to compile the code, I get a bunch of errors. Here's a simple example I've created which illustrates my problems: AView.h #import <Cocoa/Cocoa.h> #include "B.h" @interface AView : NSView { B *b; } -(void) setB: (B *) theB; @end AView.m #import "AView.h" @implementation AView - (id)initWithFrame:(NSRect)frame { self = [super initWithFrame:frame]; if (self) { // Initialization code here. } return self; } - (void)drawRect:(NSRect)dirtyRect { // Drawing code here. } -(void) setB: (B *) theB { b = theB; } @end B.h #include <iostream> class B { B() { std::cout << "Hello from C++"; } }; Here's the list of errors I get when I try to compile this: /Users/helixed/Desktop/Example/B.h:1:0 /Users/helixed/Desktop/Example/B.h:1:20: error: iostream: No such file or directory /Users/helixed/Desktop/Example/B.h:3:0 /Users/helixed/Desktop/Example/B.h:3: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'B' /Users/helixed/Desktop/Example/AView.h:5:0 /Users/helixed/Desktop/Example/AView.h:5: error: expected specifier-qualifier-list before 'B' /Users/helixed/Desktop/Example/AView.h:8:0 /Users/helixed/Desktop/Example/AView.h:8: error: expected ')' before 'B' /Users/helixed/Desktop/Example/AView.m:26:0 /Users/helixed/Desktop/Example/AView.m:26: error: expected ')' before 'B' /Users/helixed/Desktop/Example/AView.m:27:0 /Users/helixed/Desktop/Example/AView.m:27: error: 'b' undeclared (first use in this function) All I'm doing to compile this right now is using the default compiler built into Xcode. I didn't edit the Cocoa Application template in any way other than adding the two files I created and chaing the NSView to AView in the xib file. Could somebody please tell me what I'm doing wrong? Thanks, helixed

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  • Mixing Objective-C and C++

    - by helixed
    I'm trying to mix together some Objective-C code with C++. I've always heard it was possible, but I've never actually tried it before. When I try to compile the code, I get a bunch of errors. Here's a simple example I've created which illustrates my problems: AView.h #import <Cocoa/Cocoa.h> #include "B.h" @interface AView : NSView { B *b; } -(void) setB: (B *) theB; @end AView.m #import "AView.h" @implementation AView - (id)initWithFrame:(NSRect)frame { self = [super initWithFrame:frame]; if (self) { // Initialization code here. } return self; } - (void)drawRect:(NSRect)dirtyRect { // Drawing code here. } -(void) setB: (B *) theB { b = theB; } @end B.h #include <iostream> class B { B() { std::cout << "Hello from C++"; } }; Here's the list of errors I get when I try to compile this: /Users/helixed/Desktop/Example/B.h:1:0 /Users/helixed/Desktop/Example/B.h:1:20: error: iostream: No such file or directory /Users/helixed/Desktop/Example/B.h:3:0 /Users/helixed/Desktop/Example/B.h:3: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'B' /Users/helixed/Desktop/Example/AView.h:5:0 /Users/helixed/Desktop/Example/AView.h:5: error: expected specifier-qualifier-list before 'B' /Users/helixed/Desktop/Example/AView.h:8:0 /Users/helixed/Desktop/Example/AView.h:8: error: expected ')' before 'B' /Users/helixed/Desktop/Example/AView.m:26:0 /Users/helixed/Desktop/Example/AView.m:26: error: expected ')' before 'B' /Users/helixed/Desktop/Example/AView.m:27:0 /Users/helixed/Desktop/Example/AView.m:27: error: 'b' undeclared (first use in this function) All I'm doing to compile this right now is using the default compiler built into Xcode. I didn't edit the Cocoa Application template in any way other than adding the two files I created and chaing the NSView to AView in the xib file. Could somebody please tell me what I'm doing wrong? Thanks, helixed

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  • UIImagePickerController weirdness ...

    - by John Michael Zorko
    Hello, all ... UIImagePickerController is easy to use, but i'm all of a sudden finding it exasperating when I didn't find it so before. What's happening is that sometimes the imagePickerController:didFinishPickingImage:editingInfo delegate method does not seem to work -- the image will not show in the UIImageView even after the assignment was made. Sometimes it will, sometimes not, and furthermore, every single bit of example code i've tried (from the web, from the "Beginning iPhone 3 Development" book, etc.) exhibits the same problem. I'm at a loss as to why, and the problem happens on both my iPhone 3G as well as my 3GS, so I doubt that it's a hardware issue. These devices are running OS 3.1.2. The view controller is loaded from a xib file that contains one button and the UIImageView. I'd really like someone to tell me what stupid thing i'm obviously doing wrong :-) Here is the code -- i've tried to make the smallest app I could that exhibits the problem: #import <UIKit/UIKit.h> #import <Foundation/Foundation.h> @interface imagepickerViewController : UIViewController <UINavigationControllerDelegate, UIImagePickerControllerDelegate> { IBOutlet UIButton *button; IBOutlet UIImageView *imageView; } @property (nonatomic, retain) UIImageView *imageView; - (IBAction)takepic; - (void)usePic:(UIImage *)pic; @end #import "imagepickerViewController.h" @implementation imagepickerViewController @synthesize imageView; - (IBAction)takepic { if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) { UIImagePickerController *picker = [[UIImagePickerController alloc] init]; picker.sourceType = UIImagePickerControllerSourceTypeCamera; picker.delegate = self; [self presentModalViewController:picker animated:YES]; [picker release]; } } - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)info { [self usePic:image]; [picker dismissModalViewControllerAnimated:YES]; // after this method returns, the UIImageView should show the image -- yet very often it does not ... } - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker { [picker dismissModalViewControllerAnimated:YES]; } - (void)usePic:(UIImage *)picture { imageView.image = picture; } @end

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  • How to change image and disable UIBarButtonItem

    - by Alex
    I have a NavigationBar app with two views: a parent and a sub view. In the sub view I'm adding a button to the right corner as follows: - (void)viewDidLoad { UIBarButtonItem *tempButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"lock-unlocked.png"] style:UIBarButtonItemStylePlain target:self action:@selector(lockScreen)]; self.navigationItem.rightBarButtonItem = tempButton; [tempButton release]; } When that button is clicked I want to change the image of this rightBarButtonItem and disable the leftBarButtonItem (which was added automatically by the controller). Basically have two states of a button, locked and unlocked. Question 1: The only way I can find how to change the image is to create a new UIButtonItem with a new image and replace rightBarButtonItem with that new one. But I'm wondering if there's a way to just change the image without creating a new UIBarButtonItem. Am I creating a memory leak if I keep creating new UIBarButtonItem? Question 2: How can I get a hold of self.navigationItem.leftBarButtonItem and disable/enable it? I don't create that one manually, it's created automatically for me by the controller. I don't see any method/property on UIBarButtonItem to enable/disable user interaction with it.

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  • UIWebView rotation and memory problem

    - by Fer
    Hi. I have an UIWebView that loads a embedded XHTML like this: body = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)]; body.scalesPageToFit = YES; body.backgroundColor = [UIColor scrollViewTexturedBackgroundColor]; body.autoresizingMask = UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin; [self.view addSubview:body]; [body loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"article16" ofType:@"xhtml"]isDirectory:NO]]]; This XHTML have a lot of images, and when I rotate the device I got some memory warnings, and sometimes the app crashes. If I remove the autoresizing mask, specifically the UIViewAutoresizingFlexibleWidth (I have tryed with only UIViewAutoresizingFlexibleLeftMargin and UIViewAutoresizingFlexibleRightMargin with no problems), the memory warning stops, and the app does not crash anymore. If I remove all autoresizing mask, and set the new webView frame in didRotate or willRotate, I got the same warnings as using the UIViewAutoresizingFlexibleWidth. There's a app, called Atomic Web that could open the same XHTML and rotate with no memory warnings, and safari can open it as well, but if I create a project with only that UIWebView, the app sometimes crashes. Someone knows what this may be? Can I set the webview frame in other way? Why can't I use the autoresizing mask? Thanks for your attention.

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  • http stream of baselineh264 doesnt seem to work in my MPMoviePlayerViewController

    - by theprojectabot
    Here is some code... I have a stream that works correctly if I view with safari on the iphone or quicktimex on the mac... but the stream doesnt view in my code for the ipad simulator - (IBAction)clickedOpenMovie:(id)sender { NSString *myString = [NSString stringWithFormat:@"http://myipofstreamingserver:1935/live/aStream/playlist.m3u8"]; //NSString *myString = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"720p5994-prores-hq_iPhone_320x240.m4v"]; NSURL *myURL = [NSURL fileURLWithPath:myString]; [self playMovieAtURL:myURL]; } -(void)playMovieAtURL:(NSURL*)theURL { //CGRect moviePlayerFrame = CGRectMake(20, 33, 100, 100); //UIView playerView = [[[UIView alloc] initWithFrame:moviePlayerFrame] autorelease]; MPMoviePlayerViewController* movieViewController = [[MPMoviePlayerViewController alloc] initWithContentURL:theURL]; //theMovie.scalingMode = MPMovieScalingModeNone; //theMovie. = MPMovieControlStyleFullscreen; //movieViewController.controlStyle = MPMovieControlModeDefault; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(myMovieFinishedCallback:) name:MPMoviePlayerPlaybackDidFinishNotification object:movieViewController]; //UIViewController *movieViewController = [[UIViewController alloc] initWithContentURL:theURL]; [self presentMoviePlayerViewControllerAnimated:movieViewController]; //[theMovie play]; }

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  • Django Form for date range

    - by gramware
    I am trying to come up with a form that lets the user select a date range to generate a web query in Django. I am having errors getting the date to filter with in my view, I am unable to strip the date. Here is my forms.py class ReportFiltersForm(forms.Form): start_date = forms.DateField(input_formats='%Y,%m,%d',widget=SelectDateWidget()) end_date = forms.DateField(input_formats='%Y,%m,%d',widget=SelectDateWidget()) And my view if request.method == 'POST': form = ReportFiltersForm(request.POST) sdy = request.POST['start_date_year'] sdm = request.POST['start_date_month'] sdd = request.POST['start_date_day'] edy = request.POST['end_date_year'] edm = request.POST['end_date_month'] edd = request.POST['end_date_day'] start_date= datetime.date(sdy, sdm, sdd) end_date= datetime.date(edy, edm,edd) Traceback Traceback (most recent call last): File "/usr/lib/python2.6/site-packages/django/core/servers/basehttp.py", line 651, in __call__ return self.application(environ, start_response) File "/usr/lib/python2.6/site-packages/django/core/handlers/wsgi.py", line 241, in __call__ response = self.get_response(request) File "/usr/lib/python2.6/site-packages/django/core/handlers/base.py", line 134, in get_response return self.handle_uncaught_exception(request, resolver, exc_info) File "/usr/lib/python2.6/site-packages/django/core/handlers/base.py", line 154, in handle_uncaught_exception return debug.technical_500_response(request, *exc_info) File "/usr/lib/python2.6/site-packages/django/core/handlers/base.py", line 92, in get_response response = callback(request, *callback_args, **callback_kwargs) File "/home/projects/acms/cms/views.py", line 470, in eventreports start_date= datetime.date(sdy, sdm, sdd) TypeError: an integer is required

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