UIImagePickerController 的问题

Question

我在使用presentModalViewController 呈现UIImagePickerController 时遇到问题。一旦显示视图（无论是相机还是相册），应用程序就会崩溃。

整个用户界面是用代码创建的，没有界面生成器。自从我更新代码以在 ios4 上运行以来，这才停止工作。使用泄漏，我找不到任何内存，并且我获得的总内存分配约为 5mb。

这是我用来展示相机选择器的代码 -

UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
[imagePicker setSourceType:UIImagePickerControllerSourceTypeCamera];
[imagePicker setDelegate:self];
[imagePicker setAllowsEditing:YES];
[imagePicker setCameraCaptureMode:UIImagePickerControllerCameraCaptureModePhoto];
[self presentModalViewController:imagePicker animated:YES];
[imagePicker release];

代表如下 -

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
  UIImage *selectedImage = [info objectForKey:UIImagePickerControllerEditedImage];
  UIImage *newImage = [self createGameImage:selectedImage];
  [gameOptionsImageDisplay setImage:[self resizeImage:newImage toSize:CGSizeMake(95, 95)]];  
  [self dismissModalViewControllerAnimated:YES];
  [mainView setFrame:CGRectMake(0, 0, 320, 480)]; 
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
  [self dismissModalViewControllerAnimated:YES];
  [mainView setFrame:CGRectMake(0, 0, 320, 480)];  
}

将 NSZombiesEnabled 设置为 YES 告诉我 -

*** -[UIImage isKindOfClass:]: message sent to deallocated instance 0x142fc0

堆栈跟踪如下 -

0 0x313f7d7c in ___forwarding___
1 0x3138a680 in __forwarding_prep_0___
2 0x3166dad2 in -[UIImageView(UIImageViewInternal) _canDrawContent]
3 0x3166c652 in -[UIView(Internal) _didMoveFromWindow:toWindow:]
4 0x3166c50e in -[UIView(Internal) _didMoveFromWindow:toWindow:]
5 0x3166c50e in -[UIView(Internal) _didMoveFromWindow:toWindow:]
6 0x3166c50e in -[UIView(Internal) _didMoveFromWindow:toWindow:]
7 0x3166c50e in -[UIView(Internal) _didMoveFromWindow:toWindow:]
8 0x3166aa8a in -[UIView(Hierarchy) _postMovedFromSuperview:]
9 0x31672df6 in -[UIView(Hierarchy) removeFromSuperview]
10 0x316d76ee in -[UITransitionView _didCompleteTransition:]
11 0x31754556 in -[UITransitionView _transitionDidStop:finished:]
12 0x316bc97a in -[UIViewAnimationState sendDelegateAnimationDidStop:finished:]
13 0x316bc884 in -[UIViewAnimationState animationDidStop:finished:]
14 0x33e487c0 in run_animation_callbacks
15 0x33e48662 in CA::timer_callback
16 0x313caa5a in __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__
17 0x313ccee4 in __CFRunLoopDoTimer
18 0x313cd864 in __CFRunLoopRun
19 0x313768ea in CFRunLoopRunSpecific
20 0x313767f2 in CFRunLoopRunInMode
21 0x329f36ee in GSEventRunModal
22 0x329f379a in GSEventRun
23 0x316692a6 in -[UIApplication _run]
24 0x31667e16 in UIApplicationMain
25 0x00002726 in main at main.m:14

如果有人可以在这里帮助我，我将永远感激不已！

谢谢，

斯图尔特

Answer 1

我正在发布一张图像，该图像也正在自动发布。在奇怪的情况下，代码可以工作，但大多数时候它都会失败。在 3.2 中，这没有给我带来任何错误或出现，所以很可能当我仍然需要它时它没有被自动发布。大量的尝试和错误发现了它。