Objective c 从Cocos2D中卸下UIImagePickerController

我有一个CCLayer，我需要添加一个摄像头，在上面我需要一个自定义按钮来关闭叠加在摄像头上的摄像头。我最终需要在上面显示ccsprite，但首先需要能够关闭相机

但是当我点击按钮时，我会得到SIGABRT或BAD EXE错误，这取决于我是否使用

[[CCDirector sharedDirector]openGLView]sendSubviewToBack:uip.view]或
[uip.view removeFromSuperview]

-(void) displayCamera
{

uip = [[[UIImagePickerController alloc] init] autorelease];
uip.sourceType = UIImagePickerControllerSourceTypeCamera;
uip.showsCameraControls = NO;
uip.toolbarHidden = YES;
uip.navigationBarHidden = YES;
uip.wantsFullScreenLayout = YES;

[[[CCDirector sharedDirector] openGLView] addSubview:uip.view];

UIButton *arrowButton = [UIButton buttonWithType:UIButtonTypeCustom];
[arrowButton addTarget:self 
           action:@selector(arrowButtonClicked:)
 forControlEvents:UIControlEventTouchUpInside];

UIImage *imgNormal = [UIImage imageNamed:@"btn_next_norm.png"];
[arrowButton setImage:imgNormal forState:UIControlStateNormal];

UIImage *imgPressed = [UIImage imageNamed:@"btn_next_pressed.png"];
[arrowButton setImage:imgPressed forState:UIControlStateHighlighted];

arrowButton.frame = CGRectMake(screenSize.width - 48.0, screenSize.height - 37.0, 48.0, 37.0);

[[[CCDirector sharedDirector] openGLView] addSubview:arrowButton];
}

-(void)arrowButtonClicked:(id)sender
{
 // close / hide camera 

[[[CCDirector sharedDirector] openGLView] sendSubviewToBack:uip.view];

// or maybe [uip.view removeFromSuperview];

// and then go to another scene

LoadingScene* scene = [LoadingScene sceneWithTargetScene:TargetSceneEndExperienceScene];
[[CCDirector sharedDirector] replaceScene:scene];    
}

我认为问题在于这一行：

uip = [[[UIImagePickerController alloc] init] autorelease];

在这种情况下使用
autorelease
不起作用，因为
UIImagePickerController
的视图没有保留它，所以您需要确保自己保留它。我不会自动删除它，而是保留对它的引用，然后在您从视图中删除它之后，我会释放它。我已更改了您的代码以显示我的意思：

-(void) displayCamera
{

uip = [[UIImagePickerController alloc] init];  // Don't autorelease it here
uip.sourceType = UIImagePickerControllerSourceTypeCamera;
uip.showsCameraControls = NO;
uip.toolbarHidden = YES;
uip.navigationBarHidden = YES;
uip.wantsFullScreenLayout = YES;

[[[CCDirector sharedDirector] openGLView] addSubview:uip.view];

UIButton *arrowButton = [UIButton buttonWithType:UIButtonTypeCustom];
[arrowButton addTarget:self 
           action:@selector(arrowButtonClicked:)
 forControlEvents:UIControlEventTouchUpInside];

UIImage *imgNormal = [UIImage imageNamed:@"btn_next_norm.png"];
[arrowButton setImage:imgNormal forState:UIControlStateNormal];

UIImage *imgPressed = [UIImage imageNamed:@"btn_next_pressed.png"];
[arrowButton setImage:imgPressed forState:UIControlStateHighlighted];

arrowButton.frame = CGRectMake(screenSize.width - 48.0, screenSize.height - 37.0, 48.0, 37.0);

[[[CCDirector sharedDirector] openGLView] addSubview:arrowButton];
}

-(void)arrowButtonClicked:(id)sender
{
 // close / hide camera 

[uip.view removeFromSuperview];
[uip release];  // Release here
uip = nil;

// and then go to another scene

LoadingScene* scene = [LoadingScene sceneWithTargetScene:TargetSceneEndExperienceScene];
[[CCDirector sharedDirector] replaceScene:scene];    
}