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  • Conditional interface programming for iPad?

    - by Fyrian
    Hi everyone! I'm working on an app for the iPad and am a little over my head with one issue. Is it possible to build an app for iPad that uses a function to control which interface layout is displayed? Something like "if these parameters are met, use XIB file "a" else use XIB file "b". I know that's not in any kind of legitimate format, but you get the idea. If this is possible, does anyone know of any tutorials on how to do it or sample code I could look at? Thanks!

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  • 'Unable to read symbols' error

    - by cannyboy
    When I 'Build and Go' on the device, the console shows: warning: Unable to read symbols for ""/Users/Steve/Blue/build/Debug-iphoneos"/Blue.app/Blue" (file not found). warning: Unable to read symbols for ""/Users/Steve/Blue/build/Debug-iphoneos"/Blue.app/Blue" (file not found). Is this something I should worry about? If so, where should I look to find the root of the issue? The app works OK, but I'm just worried that this might be an AppStore approval issue.

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  • Autorelease vs. Release

    - by Sheehan Alam
    Given the two scenarios, which code is best practice and why? Autorelease loginButton = [[[UIBarButtonItem alloc] initWithTitle:@"Login" style:UIBarButtonItemStylePlain target:self action:@selector(loginButtonClicked:)] autorelease]; self.navigationItem.rightBarButtonItem = loginButton; or Release loginButton = [[UIBarButtonItem alloc] initWithTitle:@"Login" style:UIBarButtonItemStylePlain target:self action:@selector(loginButtonClicked:)]; self.navigationItem.rightBarButtonItem = loginButton; [loginButton release];

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  • UIView surface Detection

    - by Sanjay Darshil
    In my code I crated two UIView View1 and View2 out of which View2 rotates on finger touch using CGAffineTransform and View1 is drawn like Arrow shaped (triangle) using CGContext. The View1 is steady view (fixed) which Points (shown directed Up) to the Surface of View2 , So I want to detect the View2 surface points when it stopped rotation and appears in front of the view1. How can I made this possible to detect the UIView Surface when it appears in front of another UIView?

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  • Cell contents changing after I select rows present outside its height?

    - by wolverine
    I have set the size of the tableView that I show as the popoverController as 4*rowheight. And I am using 12cells in the tableView. Each cell contains an image and a label. I can see all the cells by scrolling. Upto 5th cell its ok. After th2 5th cell, the label and the image that I am using in the first four cells are being repeated for the remaining cells. And If I select the cell, the result is accurately shown. But when I again take the tableView, the image and labels are not accurate even for the first 5 cells. All are changed but the selection is giving the correct result. Did anyone got the idea what the problem is??

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  • Rhomobile vs. Phonegap considerations

    - by NewB
    I'm debating between Phonegap and RhoMobile for cross platform mobile application development. I'm a web developer with experience in Ruby as well as the traditional web technologies (HTML, CSS, and Javascript). The backend of this application will be accessed via a web browser and built with Rails. What are my chief concerns when choosing between these platforms? Which would you recommend I go with and WHY? Thank you

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  • Couldn't I just pass an copied string to an Core Data property?

    - by dontWatchMyProfile
    The docs say: The default implementation does not copy attribute values. If the attribute value may be mutable and implements the NSCopying protocol (as is the case with NSString, for example), you can copy the value in a custom accessor to help preserve encapsulation (for example, in the case where an instance of NSMutableString is passed as a value). So instead of getting into trouble and inconvenience with overwriting accessors in my NSManagedObject subclass, couldn't I simply do something like this? myManagedObject.firstName = [[firstNameMutableStr copy] autorelease]; This would have the exact same effect, or not? The dynamic implementation would retain that anyways ... so.... why not the easy way?

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  • Loading an external NIB, how do I set the view property?

    - by Sheehan Alam
    If I am loading a view from another NIB, how do I set the File's Owner view property? IB is not letting me hook it up to my View Controller which is loading the external NIB. My NIB looks like this: File's Owner - Identity is set to LBRootViewController First Responder LBTableViewController - Identity is set to LBTableViewController, NIB Name is LBTableViewController

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  • @synthesize comma separated list

    - by Frooditz Furs
    Hi, I've read apple's Objective-C doc and am curious about using @synthesize. I've seen classes with a long list of @synthesizes and I've seen classes with one @synthesize then a long comma-separated list of ivars. So what's the difference between: @synthesize ivar1; @synthesize ivar2; @synthesize ivar3; and @synthesize ivar1, ivar2, ivar3; ????

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  • What's the best/easiest way to compare two times in Objective-C?

    - by Andy
    I've got a string representation of a time, like "11:13 AM." This was produced using an NSDateFormatter and the stringFromDate: method. I'd like to compare this time to the current time, but when I use the dateFromString: method to turn the string back into a date, a year, month and day are added - which I don't want. I just need to know if right now is < or the time stored in the string. What's going to be the best way to handle that? Thanks in advance for your help.

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  • NSFetchedResultsController sort different sections differently (ascending/descending)?

    - by PartiallyFinite
    In my app, I have a task list (no, it's not just another todo app), and I display the tasks in a UITableView using an NSFetchedResultsController. Here is the relevant initialisation code: NSSortDescriptor *dueDateSortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"due" YES]; NSSortDescriptor *completionSortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"completed" ascending:YES]; [fetchRequest setSortDescriptors:[NSArray arrayWithObjects:completionSortDescriptor, dueDateSortDescriptor, nil]]; _fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:context sectionNameKeyPath:@"completed" cacheName:nil]; What this does is sorts the tasks such that I have an incomplete tasks section at the top, sorting with the tasks due first on top, and tasks due later further down. This all works. However, this means that the second section, the one with the completed tasks, also sorts this way, so the earliest due tasks are on top. What I want to do is change it so the second section sorts the other way around (in descending order), but the first section stays sorted in ascending order. Is this even possible? How would I go about this? Why I want to do this: The way it currently works, the tasks at the top of the second section (and therefore the most visible) are the ones that were completed ages ago. It is more likely that the user would want to see the tasks that are more recently completed (and uncheck one if it was accidentally checked), and presumably the tasks with a more recent due date were more recently completed. I am happy to add a separate completion date field to the Core Data task object if necessary (This isn't a shipping application yet, so I can change the data format however I like).

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  • TabBarController delegate is not working

    - by Zach
    Hi, Can any one help me, when i am using my UITabBarController delegate it is not working.. I called a delegate method like this.. - (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController { [self.navigationController popToRootViewControllerAnimated:NO]; }

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  • Question regrarding declaring a property

    - by Simon
    Hi. We declare properties using the @property keyword and synthesize it in the implementation file. My question is, What if I declare a property using the @property keyword and also declare a variable in the interface block with the same name? For example, consider the following code, Interface: @interface myClass : NSObject { NSString *myClass_name; // LINE 1 } @property(nonatomic, retain) NSString *myClass_name; // LINE 2 @end Implementation: @implementation myClass @synthesize myClass_name @end Declaring myClass_name in LINE 1 will make any problem? Like any reference problem or any unnecessary memory consumption problem?

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  • Key-value pair request in ASIFormDataRequest does not get response

    - by onkar
    I am sending a key-value pair inorder to get jSON response.I am trying this way. NSString *url = SAMPLE_URL; ASIFormDataRequest *request =[[[ASIFormDataRequest alloc] init] autorelease]; request=[ASIFormDataRequest requestWithURL:url]; // NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease]; //[request setURL:[NSURL URLWithString:url]]; [request setHTTPMethod:@"POST"]; [request setPostValue:@"admin" forKey:@"username"]; [request setPostValue:@"123456" forKey:@"password"]; Issue The code is running fine, but no-response/acknowledgement is obtained. EDIT 1 [request setHTTPMethod:@"POST"]; has been changed to [request setRequestMethod:@"POST"];

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  • How to update a string property of an sqlite database item

    - by Thomas Joos
    hi all, I'm trying to write an application that checks if there is an active internet connection. If so it reads an xml and checks every 'lastupdated' item ( php generated string ). It compares it to the database items and if there is a new value, this particular item needs to be updated. My code seems to work ( compiles, no error messages, no failures, .. ) but I notice that the particular property does not change, it becomese (null). When I output the binded string value it returns the correct string value I want to update into the db.. Any idea what I'm doing wrong? const char *sql = "update myTable Set last_updated=? Where node_id =?"; sqlite3_stmt *statement; // Preparing a statement compiles the SQL query into a byte-code program in the SQLite library. // The third parameter is either the length of the SQL string or -1 to read up to the first null terminator. if (sqlite3_prepare_v2(database, sql, -1, &statement, NULL) == SQLITE_OK){ NSLog(@"last updated item: %@", [d lastupdated]); sqlite3_bind_text(statement, 1, [d lastupdated],-1,SQLITE_TRANSIENT); sqlite3_bind_int (statement, 2, [d node_id]); }else { NSLog(@"SQLite statement error!"); } if(SQLITE_DONE != sqlite3_step(statement)){ NSAssert1(0, @"Error while updating. '%s'", sqlite3_errmsg(database)); }else { NSLog(@"SQLite Update done!"); }

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  • How to replace an object in an NSMutableArray at a given index with a new object

    - by shakeelw
    Hi guys. I have an NSMutableArray object(retained, synthesized as all) that is initiated just fine and I can easily add objects to it using the 'addObject:' method. But if I want to replace an object at a certain index with a new one in that NSMutableArray, it doesn't work. For example: ClassA.h @interface ClassA : NSObject { NSMutableArray *list; } @property (nonatomic, copy, readwrite) NSMutableArray *list; end ClassA.m import "ClassA.h" @implementation ClassA @synthesize list; (id)init { [super init]; NSMutableArray *localList = [[NSMutableArray alloc] init]; self.list = localList; [localList release]; //Add initial data [list addObject:@"Hello "]; [list addObject:@"World"]; } // Custom set accessor to ensure the new list is mutable (void)setList:(NSMutableArray *)newList { if (list != newList) { [list release]; list = [newList mutableCopy]; } } -(void)updateTitle:(NSString *)newTitle:(NSString *)theIndex { int i = [theIndex intValue]-1; [self.list replaceObjectAtIndex:i withObject:newTitle]; NSLog((NSString *)[self.list objectAtIndex:i]); // gives the correct output } However, the change remains true only inside the method. from any other method, the NSLog((NSString *)[self.list objectAtIndex:i]); gives the same old value. How can I actually get the old object replaced with the new one at a specific index so that the change can be noticed from within any other method as well. I even modified the method like this, but the result is the same: -(void)updateTitle:(NSString *)newTitle:(NSString *)theIndex { int i = [theIndex intValue]-1; NSMutableArray *localList = [[NSMutableArray alloc] init]; localList = [localList mutableCopy]; for(int j = 0; j < [list count]; j++) { if(j == i) { [localList addObject:newTitle]; NSLog(@"j == 1"); NSLog([NSString stringWithFormat:@"%d", j]); } else { [localList addObject:(NSString *)[self.list objectAtIndex:j]]; } } [self.list release]; //self.list = [localList mutableCopy]; [self setList:localList]; [localList release]; } Please help out guys :)

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  • Value from UISlider method?

    - by fuzzygoat
    Can anyone point me in the right direction regarding sliders, the version below was my first attempt (the range is 0.0 - 100.0) The results I get are not right. // Version 1.0 -(IBAction)sliderMoved:(id)sender { NSLog(@"SliderValue ... %d",(int)[sender value]); } // OUTPUT: // [1845:207] SliderMoved ... -1.991753 // [1845:207] SliderMoved ... 0.000000 // [1845:207] SliderMoved ... 0.000000 // [1845:207] SliderMoved ... 32768.000435 With the version below I get the values I expect, what am I missing in version_001? // Version 2.0 -(IBAction)sliderMoved:(UISlider *)sender { NSLog(@"SliderValue ... %d",(int)[sender value]); } // OUTPUT: // [1914:207] SliderMoved ... 1 // [1914:207] SliderMoved ... 2 // [1914:207] SliderMoved ... 3 // [1914:207] SliderMoved ... 4 cheers Gary

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  • Is it better to alloc/dealloc new UIBarButtonItems when toggling Edit/Done? Why?

    - by cambria
    Apple's documentation implies that for a UITableView editable with an "Edit/Done" button, you should create and destroy the button each time it's toggled. Here's a snippet of code "BonjourWeb" sample code project that does this: if (editing) { // Add the "done" button to the navigation bar UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(doneAction:)]; self.navigationItem.leftBarButtonItem = doneButton; [doneButton release]; [self addAddButton:YES]; } else { if ([self.customs count]) { // Add the "edit" button to the navigation bar UIBarButtonItem *editButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemEdit target:self action:@selector(editAction:)]; self.navigationItem.leftBarButtonItem = editButton; [editButton release]; } Is this really better than just editing the title of the button? Is there some performance optimisation that I'm not seeing? Or is this just bad example source?

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  • A question related to back button

    - by user217572
    I'm doing code for state maintainance So what happens that ,my currnet view will be appear after pressing homme now in this view i want to add backbutton in normal condition i'm adding button like this, [self navigationItem].title = NSLocalizedString(@"login_title",@""); UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"back_button",@" ") style:UIBarButtonItemStylePlain target:self action:@selector(done)]; [self.navigationItem setHidesBackButton:YES animated:YES]; self.navigationItem.leftBarButtonItem = backItem; [backItem release];

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  • Retrieve Value from NSString

    - by Taimur Hamza
    Hi, i have a NSString instance ,i want to retrieve value from it and store it into an integer. This is wat i am doing but its not working. NSString *totalcnt; char *str = totalcnt; int a = atoi(str); Help me out. Thanks Taimur

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  • App Crashing Inspite of Being ARC Enabled

    - by proctr
    I have been working on an iOS App for sometime now and its almost ready to submit. However, when I gave it to few people for testing purposes (running iOS 5)..they reported cases where the app crashes and the home screen is displayed on the phone OR a frozen app screen appears with no response whatsoever The app is ARC enabled and Xcode shows no warnings. So, I'm relli tensed about what's going wrong. I have declared properties in the following fashion: @property (nonatomic) IBOutlet UILabel *devCountLabel; @property (nonatomic) IBOutlet UIView *splashView; Likewise other properties are declared. Could anyone provide a solution ASAP. It is mainly a network based app and thus, CoreData usage is minimum.. Anyway, I'm running out of time..So Please provide a fix asap..oh and thanks a ton for it. PS: The App doesn't crash in the simulator, so I'm guessing it has something related to memory. And the crashes are random. So, repeating a set of steps to reproduce the crash doesn't help either. For Eg. When I click a button, modalViewControllerAnimation results in normal case. Now this occurs as expected most of the time and freezes the app other times.

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  • Navigationcontroller, why isnt this working?

    - by f0rz
    Hi ! Why wont this work? View1 loads View2. In view2: - (void) goToView { View3 *plainText = [[Tabview_testViewController alloc] initWithNibName:@"View3" bundle:nil]; [self.navigationController pushViewController:plainText animated: NO]; [plainText release]; } - (void)viewDidLoad { [self goToView]; [super viewDidLoad]; } This will not trigger navigationController to pushView, but if I add a button and setAction (goToView) it works perfectly. What kind of problem do I missing here? Regards

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