UIImagePickerController 在 iOS4 上崩溃

Question

当尝试显示 UIImagePickerController 时，我遇到了奇怪的问题，我的应用程序在 iOS4 上崩溃了。这是日志的输出：

malloc: *** error for object 0x550ba20: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug

设置断点，尝试监视对象 0x550ba20 的名称（使用 print-object）不起作用。启用僵尸检测也不起作用。这是我的代码：

if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {

  cameraPicker = [[UIImagePickerController alloc] init];
  cameraPicker.delegate = self;

  cameraPicker.sourceType = UIImagePickerControllerSourceTypeCamera;

  // Insert the overlay:
  cameraPicker.cameraOverlayView = self.overlay;
  self.cameraPicker.delegate = self;

  //Hide controls
  cameraPicker.showsCameraControls = NO;
  cameraPicker.navigationBarHidden = YES;

  // Make camera view full screen:
  cameraPicker.wantsFullScreenLayout = YES;
  cameraPicker.cameraViewTransform = CGAffineTransformScale(self.cameraPicker.cameraViewTransform, 1.0, 1.12412);


  [self presentModalViewController:cameraPicker animated:NO];
  [cameraPicker release];

有什么想法吗？代码在viewDidLoad的最后执行。

Answer 1

CameraPicker 是一个属性吗？您首先将其初始化为局部变量，然后将其用作属性：

cameraPicker.cameraOverlayView = self.overlay;
!!self.!!cameraPicker.delegate = self;

和

cameraPicker.cameraViewTransform = CGAffineTransformScale(!!self.!!cameraPicker.cameraViewTransform, 1.0, 1.12412);