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  • Can't access UI from a delegate?

    - by Nick Brooks
    I got this code: GrooveOnDownload *dlg = [[GrooveOnDownload alloc] init]; NSURLDownload *dw = [[NSURLDownload alloc] initWithRequest:request delegate:dlg]; It starts the download in a delegate class with outlets for UI controls. But for some reason controls don't respond to direct messages from the delegate. //Header of the delegate @interface GrooveOnDownload : NSObject { IBOutlet id downloadButton; //... //Implementation //... [downloadButton setEnabled:FALSE]; // Doesn't work //... Any ideas?

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  • Why won't my movie play using MPMoviePlayerController?

    - by Nosrettap
    I'm trying to get a basic movie to play in an iPhone app; however, I can't seem to get it to work. Here's my entire code: #import <MediaPlayer/MediaPlayer.h> #import "ViewController.h" @implementation ViewController - (IBAction)playMoviePressed:(id)sender { NSURL *url = [NSURL URLWithString:@"http://www.ebookfrenzy.com/ios_book/movie/movie.mov"]; MPMoviePlayerController *moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:url]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlayBackDidFinish:) name:MPMoviePlayerPlaybackDidFinishNotification object:moviePlayer]; moviePlayer.controlStyle = MPMovieControlStyleDefault; moviePlayer.shouldAutoplay = YES; [self.view addSubview:moviePlayer.view]; [moviePlayer setFullscreen:YES animated:YES]; [moviePlayer prepareToPlay]; [moviePlayer play]; } @end I have one button on screen that calls playMoviePressed when it is tapped. I know that this method is getting called. I have also tried this with .mov and .mp4 local files that I have dragged into xcode.

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  • UIImage Fade in after load on my UITable

    - by Cy
    I have an UIImage that loads from the web, and I'd like it to fade in when it displays in my UITableCell. if([thumb image]) { UIImage *imagen = [thumb.image retain]; [imagen drawInRect:CGRectMake(15, 4, 44, 44)]; [imagen release]; } How could I achieve it?

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  • Make an NSString accessible in the whole class

    - by OhhMee
    Hello, I want to know how can I make an NSString accessible in the whole class. Say I have these codes: - (void) init { NSArray *elements = [xpathParser search:@"//foo"]; TFHppleElement *element = [elements objectAtIndex:0]; NSString *data = [element content]; NSArray *elements1 = [xpathParser search:@"//foo2"]; TFHppleElement *element2 = [elements1 objectAtIndex:0]; NSString *data2 = [element2 content]; } And I want to use data & data2 in the whole class, how can I do that? I want to show results here: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; } // Configure the cell. switch (indexPath.row) { case 0 : cell.textLabel.text = (@"%@", data); break; case 1: cell.textLabel.text = (@"%@", data2); break; } // Email & Password Section return cell; }

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  • Application crashes after when array of images are stored

    - by sujyanarayan
    Hi, I'm getting the screenshots from the following code:- CGImageRef cgScreen = UIGetScreenImage(); if (cgScreen) { UIImage *result = [UIImage imageWithCGImage:cgScreen]; CGImageRelease(cgScreen); return result; } I'm calling the above code in a timer of 1/1.0 seconds as:- [array addObject:[UIImage imageWithScreenContents]]; where imagewithScreenContents is a function. But after some seconds i.e after adding 90 frames application crashes. I'm unable to understand the problem. Can somebody help me in solving the problem. Thanks in Adv.

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  • obj-c, how do I create a property and synthesize an NSUInteger ?

    - by Jules
    I'm having some trouble using an NSUInteger, I've tried various things and googled, but not found the answer ? I have... I also tried ... nonatomic, retain @property (readwrite, assign) NSUInteger *anAmount; @synthesize anAmount; error: type of property 'anAmount' does not match type of ivar 'anAmount' Also when I release it in dealloc I get a warning.. warning: invalid receiver type 'NSUInteger'

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  • How to use Devicemotion/Gyroscope to move a dot from center to 8 directions of iphone screen

    - by iSeeker
    I am trying to move a dot at center to 8 directions of iphone screen using Devicemotion such that it moves faster when tilted at a faster rate. Rough sketch is below: I could find a similar implementation in an app called Gyrododge in appstore, i cant figure out how to make it work... Update: This is what i have done so far, but the response is not smooth, and is very jittery.. xdiff and ydiff are the change of device attitude in x and y directions, derived from quatenion implementation. if (currDeviceMotion.rotationRate.x < -2) { NSLog(@"To Top"); if (195+800*ydiff >=193 && 195+800*ydiff <= 197) { [self.pitchDot setFrame:CGRectMake(150, 195, 20, 20)]; }else{ if (195+800*ydiff >=390 ) { [self.pitchDot setFrame:CGRectMake(150, 390, 20, 20)]; }else if (195+800*ydiff <= 0){ [self.pitchDot setFrame:CGRectMake(150, 0, 20, 20)]; }else if(195+800*ydiff < 194){ [self.pitchDot setFrame:CGRectMake(150, 195+800*ydiff, 20, 20)]; }else if(195+800*ydiff > 196){ [self.pitchDot setFrame:CGRectMake(150, 195+800*ydiff, 20, 20)]; } } }else if (currDeviceMotion.rotationRate.x > 2){ NSLog(@"To Bottom"); if (195+800*ydiff >=193 && 195+800*ydiff <= 197) { [self.pitchDot setFrame:CGRectMake(150, 195, 20, 20)]; }else{ if (195+800*ydiff >=390 ) { [self.pitchDot setFrame:CGRectMake(150, 390, 20, 20)]; }else if (195+800*ydiff <= 0){ [self.pitchDot setFrame:CGRectMake(150, 0, 20, 20)]; }else if(195+800*ydiff < 194){ [self.pitchDot setFrame:CGRectMake(150, 195+800*ydiff, 20, 20)]; }else if(195+800*ydiff > 196){ [self.pitchDot setFrame:CGRectMake(150, 195+800*ydiff, 20, 20)]; } } }else if (currDeviceMotion.rotationRate.y < -2){ NSLog(@"To Left"); if (150+500*xdiff >= 148 && 150+500*xdiff <=152) { [self.pitchDot setFrame:CGRectMake(150, 195, 20, 20)]; }else{ if (150+500*xdiff >= 300 ) { [self.pitchDot setFrame:CGRectMake(300, 195, 20, 20)]; }else if (150+500*xdiff <= 0){ [self.pitchDot setFrame:CGRectMake(0, 195, 20, 20)]; }else if(150+500*xdiff < 148){ [self.pitchDot setFrame:CGRectMake(150+500*xdiff, 195, 20, 20)]; }else if(150+500*xdiff > 152){ [self.pitchDot setFrame:CGRectMake(150+500*xdiff, 195, 20, 20)]; } } }else if (currDeviceMotion.rotationRate.y > 2){ NSLog(@"To Right"); if (150+500*xdiff >= 148 && 150+500*xdiff <=152) { [self.pitchDot setFrame:CGRectMake(150, 195, 20, 20)]; }else{ if (150+500*xdiff >= 300 ) { [self.pitchDot setFrame:CGRectMake(300, 195, 20, 20)]; }else if (150+500*xdiff <= 0){ [self.pitchDot setFrame:CGRectMake(0, 195, 20, 20)]; }else if(150+500*xdiff < 148){ [self.pitchDot setFrame:CGRectMake(150+500*xdiff, 195, 20, 20)]; }else if(150+500*xdiff > 152){ [self.pitchDot setFrame:CGRectMake(150+500*xdiff, 195, 20, 20)]; } } }else if (currDeviceMotion.rotationRate.x < -0.20 && currDeviceMotion.rotationRate.y > 0.20 ){ NSLog(@"To Diagonal Right Top"); if (150+650*xdiff >= 148 && 150+650*xdiff <=152) { [self.pitchDot setFrame:CGRectMake(150, 195, 20, 20)]; }else{ if (150+650*xdiff >= 300 ) { [self.pitchDot setFrame:CGRectMake(300, 0, 20, 20)]; }else if(150+650*xdiff > 152){ [self.pitchDot setFrame:CGRectMake(150+650*xdiff, 195-1.3*650*xdiff, 20, 20)]; } } }else if (currDeviceMotion.rotationRate.x > 0.20 && currDeviceMotion.rotationRate.y < -0.20 ){ NSLog(@"To Diagonal Left Bottom"); if (150+650*xdiff >= 148 && 150+650*xdiff <=152) { [self.pitchDot setFrame:CGRectMake(150, 195, 20, 20)]; }else{ if (150+650*xdiff <= 0 ) { [self.pitchDot setFrame:CGRectMake(0, 390, 20, 20)]; }else if(150+650*xdiff < 148){ [self.pitchDot setFrame:CGRectMake(150+650*xdiff, 195-1.3*650*xdiff, 20, 20)]; } } }else if (currDeviceMotion.rotationRate.x < -0.20 && currDeviceMotion.rotationRate.y < -0.20 ){ NSLog(@"To Diagonal Left Top and xdiff is %f",xdiff); if (150+650*xdiff >= 148 && 150+650*xdiff <=152) { [self.pitchDot setFrame:CGRectMake(150, 195, 20, 20)]; }else{ if (150+650*xdiff <= 0 ) { [self.pitchDot setFrame:CGRectMake(0, 0, 20, 20)]; }else if(150+650*xdiff < 148){ [self.pitchDot setFrame:CGRectMake(150+650*xdiff, 195+1.3*650*xdiff, 20, 20)]; } } }else if (currDeviceMotion.rotationRate.x > 0.20 && currDeviceMotion.rotationRate.y > 0.20 ){ NSLog(@"To Diagonal Right Bottom"); if (150+650*xdiff >= 148 && 150+650*xdiff <=152) { [self.pitchDot setFrame:CGRectMake(150, 195, 20, 20)]; }else{ if (150+650*xdiff >= 300 ) { [self.pitchDot setFrame:CGRectMake(300, 390, 20, 20)]; }else if(150+650*xdiff > 152){ [self.pitchDot setFrame:CGRectMake(150+650*xdiff, 195+1.3*650*xdiff, 20, 20)]; } } }else if((currDeviceMotion.rotationRate.x < 0.20 && currDeviceMotion.rotationRate.x < -0.20) ||(currDeviceMotion.rotationRate.y < 0.20 && currDeviceMotion.rotationRate.y < -0.20) ||(currDeviceMotion.rotationRate.z < 0.20 && currDeviceMotion.rotationRate.z < -0.20)){ [self.rollDot setFrame:CGRectMake(150, 195, 20, 20)]; [self.pitchDot setFrame:CGRectMake(150, 195, 20, 20)]; } It could be great if i could make it move like the application i have stated above, called Gyrododge This link also addresses a similar question:Link. Any advice or help is greatly appreciated... Thanks.

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  • Retrieving Data in A NSTableView

    - by Heisennberg
    I have a three column Table View populated by two NSMutableDictionaries which share the same keys (ie key | value1 | value2 ) with dict1(key,value1) and dict2(key,value2). I want to manually enter data in the third column and create the key/value objects in dict2. But when I do that, my code picks the wrong key :S Here's the code for the delegate : - (void)tableView:(NSTableView *)aTableView setObjectValue:(id)anObject forTableColumn:(NSTableColumn *)aTableColumn row:(NSInteger)rowIndex { if ([[aTableColumn identifier] isEqualToString:@"value2"]) { [dict2 setValue:anObject forKey:[[[aTableView tableColumnWithIdentifier:@"key"] dataCellForRow:rowIndex] stringValue ]]; } } Any idea ?

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  • Core Data to-many relationship in code

    - by Jan Bezemer
    I have three entities: Session, User and Test. A session has 0-many users and a user can perform 0-6 tests. (I say 0 but in the real application always at least 1 is required, at least 1 user for a session and at least 1 test for a user. But I say 0 to express an empty start.) All entities have their own specific data attributes too. A user has a name, A session has a name, a test has six values to be filled in by the user, and so on. But my issue is with the relationships. How do I set multiple users and have them added to one session (same goes for multiple tests for one user). How do I show the content in a right way? How do I show a session that has multiple users and these users having completed multiple tests? Here's my code so far with regard to issue 1: Session *session = [NSEntityDescription insertNewObjectForEntityForName:@"Session" inManagedObjectContext:context]; session.name = @"Session 1"; User *users = [NSEntityDescription insertNewObjectForEntityForName:@"User" inManagedObjectContext:context]; users.age = [NSNumber numberWithInt:28]; users.session = session; //sessie.users = users; [sessie addUserObject:users]; With regard to issue 2: I can log the session, but I can't get the user(s) logged from a session. NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; NSEntityDescription *entity = [NSEntityDescription entityForName:@"Session" inManagedObjectContext:context]; [fetchRequest setEntity:entity]; NSArray *fetchedObjects = [context executeFetchRequest:fetchRequest error:&error]; for (Session *info in fetchedObjects) { NSLog(@"Name: %@", info.name); NSLog(@"Having problems with this: %@",info.user); //User *details = info.user; //NSLog(@"User: %@", details.age); }

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  • App rejected due to "iPhone Apps must also run on iPad without modification, at iPhone resolution, and at 2X iPhone 3GS resolution"

    - by sunny
    My app got rejected by the apple because of the reason "iPhone Apps must also run on iPad without modification, at iPhone resolution, and at 2X iPhone 3GS resolution".Apple suggested that "to support the iPad 3GS 2X, and this issue is usually resolved through settings in "compatibility" mode. "no black bar's or borders"".So,my question is how to set and run the app in compatibility mode.Any one having this issue please help on this issue.I have no idea to go forward. Please any suggestions and help thanks in advance.

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  • How do I know when to increase or decrease angle to get a specific angle?

    - by Thomas
    Hi. I am programming a game and I have come to a very hard spot. Basically I have a circle and I have 2 angles on this circle. Angle 1 (A) is a point I want angle 2 (B) to go to. During my game every frame I need to check weither or not to increase or decrease my angle value by a certain amount (speed) to eventually reach the first angle. My question is how do I do this? I tried doing this but I don't seem to be doing it right. bool increase = false; float B = [self radiansToDegrees:tankAngle]; float A = [self radiansToDegrees:tankDestinationAngle]; float newAngle = B; if(B < A) { float C = B - (360 - A); float D = A - B; if(C < D) increase = false; else increase = true; } else if(B A) { float C = B - A; float D = A - (360 - B); if(C < D) increase = false; else increase = true; } if(increase) { newAngle += 1.0; } else { newAngle -= 1.0; } if(newAngle 360.0) { newAngle = 0 + (newAngle - 360.0); } else if(newAngle < 0.0) { newAngle = 360 + newAngle; } if(newAngle == 0) newAngle = 360; newAngle = [self degreesToRadians:newAngle]; [self setTanksProperPositionRotation:newAngle]; The basic effect I am trying to achieve is when the user makes a new point, which would be angle 1, angle 2 would move towards angle 1 choosing the fastest direction. I think I have spent around 4 hours trying to figure this out.

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  • when to use "willChangeValueForKey" and "didChangeValueForKey"?

    - by Frost Li
    I saw these lines in a demo project, but I couldn't understand why it did that. [self willChangeValueForKey:@"names"]; [self didChangeValueForKey:@"names"]; It called didChangeValueForKey immediately after willChangeeValueForKey. Does it make any sense? Furthermore, when should be the right time to call this two methods? Thanks a lot!! :)

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  • c++ class in cocoa

    - by joels
    Any ideas why Xcode wont let me define a c++ class in my cocoa project? I am trying to use a C++ class in my cocoa project but I am getting build errors just creating the c++ header file. class SomeClass{ public: int count; } Expected '=', ',', ';', 'asm' or 'attribute' before 'SomeClass' in ..... If I remove all code from the header file, ?the cpp file builds without any errors and is included in the list of compiled sources...

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  • HElp for Https???

    - by madhavi
    i want to send request on Https so do i need to install the SSL certificate as the steps are given for apple push notification please help me i am new and i have never worked on OpenSSL

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  • Content Alignment Issue in UITableView cell

    - by OhhMee
    Please see the image attached. I don't understand why it's going outside. I've also attached code snippet for tableView. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier]; // cell.accessoryType = UITableViewCellAccessoryDetailDisclosureButton; } // Configure the cell. hNode* dCell = [array objectAtIndex:[indexPath row]]; cell.textLabel.text = @"Message"; cell.detailTextLabel.text = [NSString stringWithFormat:@"%@",[dCell contents]]; cell.detailTextLabel.lineBreakMode = UILineBreakModeWordWrap; cell.detailTextLabel.numberOfLines = 0; [[cell imageView] setImage:[UIImage imageNamed:@"user.png"]]; return cell; } - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath*)indexPath { return 60; } Where could be the issue?

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  • How to efficiently get all instances from deeper level in Cocoa model?

    - by Johan Kool
    In my Cocoa Mac app I have an instance A which contains an unordered set of instances B which in turn has an ordered set of instances C. An instance of C can only be in one instance B and B only in one A.   I would like to have an unordered set of all instances C available on instance A. I could enumerate over all instances B each time, but that seems expensive for something I need to do often. However, I am a bit worried that keeping track of instances C in A could become cumbersome and be the cause of  inconsistencies, for example if an instance C gets removed from B but not from A.  Solution 1 Use a NSMutableSet in A and add or remove C instances whenever I do the same operation in B.  Solution 2 Use a weak referenced NSHashTable in A. When deleting a C from B, it should disappear for A as well.  Solution 3 Use key value observing in A to keep track of changes in B, and update a NSMutableSet in A accordingly.  Solution 4 Simply iterate over all instances B to create the set whenever I need it.   Which way is best? Are there any other approaches that I missed?  NB I don't and won't use CoreData for this app.

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  • Using a framework in a PreferencePane

    - by Jonathan
    Hi, i am currently trying to implement a "third party framework" (FeedbackReporter.Framework) into my preferencepane. Unfortunately I am getting the following error all the time when trying to launch my preference pane: 16.05.10 23:13:30 System Preferences[32645] dlopen_preflight failed with dlopen_preflight(/Users/me/Library/PreferencePanes/myPane.prefPane/Contents/MacOS/myPane): Library not loaded: @executable_path/../Frameworks/FeedbackReporter.framework/Versions/A/FeedbackReporter Referenced from: /Users/me/Library/PreferencePanes/myPane.prefPane/Contents/MacOS/myPane Reason: image not found for /Users/me/Library/PreferencePanes/myPane.prefPane As far as I read so far, this problem is probably caused because my prefPane is no actual app, but a "plugin" of "System Settings.app" and thus @executable_path resolves to a path within the bundle of this app, instead of the bundle of my prefpane. But I don't really picked up howto fix this problem. I guess it must be fairly easy since it should be a usual case that people use non-apple-frameworks in PreferencePanes. Thanks for your hints!

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