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  • How to control overlapping Alpha fades on iPhone...

    - by ReduxDJ
    I have two animation methods, basically the just repeat... How do I prevent them from overlapping and flickering, is there a convenient way to do this? Thanks, -(void) doPowerChangeAnimUp { powerIconChange .alpha = 0; [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDidStopSelector:@selector(animationDidStop:)]; [UIView setAnimationDelegate:self] ; [UIView setAnimationDuration:2]; [powerIconChange setAlpha:1]; [UIView commitAnimations]; } -(void)animationDidStop:(NSString *)animationID { [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDelegate:self] ; [UIView setAnimationDidStopSelector:@selector(doPowerChangeAnimUp)]; [UIView setAnimationDuration:2]; [powerIconChange setAlpha:0]; [UIView commitAnimations]; }

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  • Using the system localizations on iPhone

    - by nevan
    I want to make a back button for a navigation controller with the title "Back" instead of the title of the previous controller. I'm using this code: UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"Back", @"Back") style:UIBarButtonItemStyleBordered target:nil action:nil]; self.navigationItem.backBarButtonItem = backButton; I'd like to be able to skip localizing the "Back" string in my app (since I can only localize it in a limited number of languages). If I give my navigation controller no title, the back button will be automatically localized into whatever the language the user has chosen, so the system has translations of "Back" in many languages. Is there a way to access the localizations that are already present in the system and use them myself? These are things like "Back", "Cancel", "Done" and so on, which show up when creating one of the standard system buttons.

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  • iPhone crashing when presenting modal view controller

    - by Michael Waterfall
    I'm trying to display a modal view straight after another view has been presented modally (the second is a loading view that appears). - (void)viewDidAppear:(BOOL)animated { [super viewDidAppear:animated]; // Show load LoadViewController *loader = [[LoadViewController alloc] init]; [self presentModalViewController: loader animated:NO]; [loader release]; } But when I do this I get a "Program received signal: "EXC_BAD_ACCESS"." error. The stack trace is: 0 0x30b43234 in -[UIWindowController transitionViewDidComplete:fromView:toView:] 1 0x3095828e in -[UITransitionView notifyDidCompleteTransition:] 2 0x3091af0d in -[UIViewAnimationState sendDelegateAnimationDidStop:finished:] 3 0x3091ad7c in -[UIViewAnimationState animationDidStop:finished:] 4 0x0051e331 in run_animation_callbacks 5 0x0051e109 in CA::timer_callback 6 0x302454a0 in CFRunLoopRunSpecific 7 0x30244628 in CFRunLoopRunInMode 8 0x32044c31 in GSEventRunModal 9 0x32044cf6 in GSEventRun 10 0x309021ee in UIApplicationMain 11 0x00002154 in main at main.m:14 Any ideas? I'm totally stumped! The loading view is empty so there's definitely nothing going on in there that's causing the error. Is it something to do with launching 2 views modally in the same event loop or something? Thanks, Mike Edit: Very strange... I have modified it slightly so that the loading view is shown after a tiny delay, and this works fine! So it appears to be something within the same event loop! - (void)viewDidAppear:(BOOL)animated { [super viewDidAppear:animated]; // Show load [self performSelector:@selector(doit) withObject:nil afterDelay:0.1]; } - (void)doit { [self presentModalViewController:loader animated:YES]; }

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  • iPhone animated banner : which framework to use

    - by Julien
    Hi folks, I'm willing to create a little frame to display animated ads in my app. It could be simple little animations, or "3D" transition between ads, or combination of both. I'm not familiar with graphic frameworks, I just used CoreGraphics, which I think is not optimized for that. I thought of OpenGL, but maybe that's too much and takes too much ressources just for this little thing. What do you think ?

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  • problem with connection of facebook in my app for iPhone

    - by Arun Sharma
    hello I have complete code of facebook connection. But When i dragged the complete code into my application then 112 errors will occurs. wherever i have use use that code "FBConnect/FBConnectGlobal.h"Then error will arises "FBConnect/FBConnectionGlobal.h" No such file or directory. Even i have given all the path in project setting/project active setting. So please tell me some solution how to rectify some solution. and also tell me exact place where i have set the path and what to give in that path Thanks

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  • Explain please download file iphone

    - by Floo
    hi all ! i want to download plist from my server usibg http:// i have searched the web and everybody says use that class or that one ... but no example on how to do this. may be it is really simple but i'm a noob so if someone can explain or give a link he'll be my heroe thanks to all !!!

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  • Basic drawing with Quartz 2D on iPhone

    - by wwrob
    My goal is to make a program that will draw points whenever the screen is touched. This is what I have so far: The header file: #import <UIKit/UIKit.h> @interface ElSimView : UIView { CGPoint firstTouch; CGPoint lastTouch; UIColor *pointColor; CGRect *points; int npoints; } @property CGPoint firstTouch; @property CGPoint lastTouch; @property (nonatomic, retain) UIColor *pointColor; @property CGRect *points; @property int npoints; @end The implementation file: //@synths etc. - (id)initWithFrame:(CGRect)frame { return self; } - (id)initWithCoder:(NSCoder *)coder { if(self = [super initWithCoder:coder]) { self.npoints = 0; } return self; } - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; firstTouch = [touch locationInView:self]; lastTouch = [touch locationInView:self]; } - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; lastTouch = [touch locationInView:self]; points = (CGRect *)malloc(sizeof(CGRect) * ++npoints); points[npoints-1] = CGRectMake(lastTouch.x-15, lastTouch.y-15,30,30); [self setNeedsDisplay]; } - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; lastTouch = [touch locationInView:self]; [self setNeedsDisplay]; } - (void)drawRect:(CGRect)rect { CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetLineWidth(context, 2.0); CGContextSetStrokeColorWithColor(context, [UIColor blackColor].CGColor); CGContextSetFillColorWithColor(context, pointColor.CGColor); for(int i=0; i<npoints; i++) CGContextAddEllipseInRect(context, points[i]); CGContextDrawPath(context, kCGPathFillStroke); } - (void)dealloc { free(points); [super dealloc]; } @end When I load this and click some points, it draws the first points normally, then then next points are drawn along with random ellipses (not even circles). Also I have another question: When is exactly drawRect executed?

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  • iPhone Core Data - Access deep attributes with to many relationships

    - by ncohen
    Hi everyone, Let say I have an entity user which has a one to many relationship with the entity menu which has a one to many relationship with the entity meal which has a many to one relationship with the entity recipe which has a one to many relationship with the entity element. What I would like to do is to select the elements which belong to a particular user (username = myUsername) and particular menu*s* (minDate < menu.date < maxDate). Does anyone have an idea how to get them? Thanks

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  • iPhone and iPad : Doing a "select * from something" query in a SQLite database

    - by Abramodj
    Hi folks, i'm trying to use the SQLite data base in my iPad app, and here's my function to make a query: - (void)executeQuery:(char*)query { NSString *file = [self getWritableDBPath]; NSFileManager *fileManager = [NSFileManager defaultManager]; BOOL success = [fileManager fileExistsAtPath:file]; // If its not a local copy set it to the bundle copy if(!success) { //file = [[NSBundle mainBundle] pathForResource:DATABASE_TITLE ofType:@"db"]; [self createEditableCopyOfDatabaseIfNeeded]; } dataArray = NULL; dataArray = [NSMutableArray array]; sqlite3 *database = NULL; if (sqlite3_open([file UTF8String], &database) == SQLITE_OK) { sqlite3_exec(database, query, loadTimesCallback, dataArray, NULL); } sqlite3_close(database); [self logResults]; } if I call [self executeQuery:"select name from table1"]; everything is working fine. But if i call [self executeQuery:"select * from cars"]; the app crashes telling me that the NSMutableArray dataArray is not the right kind of variable where to set the query results. So, how can i do a "select * form table1" query, and store the results? Thanks! EDIT: Here's my loadTimesCallback method: static int loadTimesCallback(void *context, int count, char **values, char **columns) { NSMutableArray *times = (NSMutableArray *)context; for (int i=0; i < count; i++) { const char *nameCString = values[i]; [times addObject:[NSString stringWithUTF8String:nameCString]]; } return SQLITE_OK; }

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  • iPhone SDK 4.0 Phone locked tool

    - by gmcalab
    Is there going to be a way with the 4.0 SDK to create a tool similar to Pandora(which was demoed today), so when the phone is locked, I can manipulate my app? So basically if my app was running, and my phone locks I don't have to unlock the phone to toggle something for the app?

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  • iPhone Tab Bar application crash

    - by Mark Szymanski
    I have an application that uses a tab bar and whenever it launches it crashes and gives me the following error and stack trace: 2010-04-22 16:15:03.390 iCrushCans[59858:207] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIWindow 0x3e051a0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key rootViewController.' 2010-04-22 16:15:03.392 iCrushCans[59858:207] Stack: ( 29680731, 2425423113, 29839809, 305768, 304309, 2957847, 4641908, 29583663, 4636459, 4644727, 2805842, 2844630, 2833204, 2815615, 2842721, 37776729, 29465472, 29461576, 2809365, 2846639 ) Thanks in advance!

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  • [iPhone app] Detecting which key has been pressed in UITextField

    - by Dough
    Hi, I have an UITextField object in my view and want to launch a method when user press backspace button and textField is empty. First I have to do is to create a cursor storing text length, so when cursor changes from 1 to 0 there is nothing to do. The only way to launch the method is when text length is 0 - press backspace - remain to 0. How to catch the event of pressing the backspace key in my UITextField ? Thanks in advance !

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  • iphone In app purchase

    - by edie
    Hi... I'm adding in-app purchase on my application. I have a view that displays information about the product and one button for purchasing the product. My question was how can I stop the user to tap again the buy button so that the StoreManager will only call my Buy method once? Because sometimes I had tapped it twice that's why two alertView shows up asking about the purchase. Should I set the button "enabled property" to no after I tap. Any suggestions that would be good about this... thanks in advance.

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  • iphone app hangs in AppDelegate (?)

    - by d_CFO
    No nib/IB, so I've inserted "myAppDelegate" in main and deleted the reference to main.xib in info.plist. Debug continues nicely through all five tab controllers; they seem to have gotten properly loaded into the nav controller. In fact, control passes out of the last "}" in applicationDidFinishLaunching. But there was no (visible) response back at [window addSubview:[tabBarController view]]; and [window makeKeyAndVisible]; statements, much less to the loadView within the first tab (program execution never gets there). The last line is, UIApplication _performInitializationWithURL:sourceBundleID:]. I missed a step? I executed a step improperly?

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  • TouchXML to read in twitter feed for iphone app

    - by Fiona
    Hello there, So I've managed to get the feed from twitter and am attempting to parse it... I only require the following fields from the feed: name, description, time_zone and created_at I am successfully pulling out name and description.. however time_zone and created_at always are nil... The following is the code... Anyone see why this might not be working? -(void) friends_timeline_callback:(NSData *)data{ NSString *string = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding]; NSLog(@"Data from twitter: %@", string); NSMutableArray *res = [[NSMutableArray alloc] init]; CXMLDocument *doc = [[[CXMLDocument alloc] initWithData:data options:0 error:nil] autorelease]; NSArray *nodes = nil; //! searching for item nodes nodes = [doc nodesForXPath:@"/statuses/status/user" error:nil]; for (CXMLElement *node in nodes) { int counter; Contact *contact = [[Contact alloc] init]; for (counter = 0; counter < [node childCount]; counter++) { //pulling out name and description only for the minute!!! if ([[[node childAtIndex:counter] name] isEqual:@"name"]){ contact.name = [[node childAtIndex:counter] stringValue]; }else if ([[[node childAtIndex:counter] name] isEqual:@"description"]) { // common procedure: dictionary with keys/values from XML node if ([[node childAtIndex:counter] stringValue] == NULL){ contact.nextAction = @"No description"; }else{ contact.nextAction = [[node childAtIndex:counter] stringValue]; } }else if ([[[node childAtIndex:counter] name] isEqual:@"created_at"]){ contact.date == [[node childAtIndex:counter] stringValue]; }else if([[[node childAtIndex:counter] name] isEqual:@"time_zone"]){ contact.status == [[node childAtIndex:counter] stringValue]; [res addObject:contact]; [contact release]; } } } self.contactsArray = res; [res release]; [self.tableView reloadData]; } Thanks in advance for your help!! Fiona

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