UIImagePickerController相机在翻转时冻结并取消几次

时间:2014-04-09 23:01:27

标签: objective-c ios7 camera uiimagepickercontroller

您好我在使用相机的应用中工作。

我可以正确打开并使用相机。但我发现了一个错误:

当我打开相机时,翻转相机,再次翻转相机并按取消。做几次(3 - 5)。再打开相机,我有一个黑色的冻结屏幕几秒钟,如果你拍照看到图像,但屏幕继续黑色。几秒钟后,相机再次出现,您可以继续正常行为。但我无法找到解决方案。

我在互联网上搜索了很多并找到了一些答案,但没有解决我的问题。

这是一个类似的问题,但解决方案对我没有用处:

我也使用DejalBezelActivityView创建一个带有标签DejalBezelActivityView

的微调区域

有什么想法吗?

我有我的.h声明:

@property (nonatomic, strong) UIImagePickerController* picker;

- (void) takePhoto: (id)vc;
- (void) selectPhoto: (id)vc;

我的.mm代码:

@synthesize picker = _picker;

- (id) init{
self = [super init];

if (self){
    self.picker = [[UIImagePickerController alloc] init];

}
return self;
}



- (void)takePhoto:(id)vc{
if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
    [VC_Camera showAlert];
    return;
}

[self init];
self.picker.delegate = self;
self.picker.allowsEditing = YES;
self.picker.sourceType = UIImagePickerControllerSourceTypeCamera;
self.picker.cameraDevice = UIImagePickerControllerCameraDeviceRear;

[[VC_Camera getMainWindow] presentViewController:self.picker animated:YES completion:NULL];
}

- (void)selectPhoto:(id)vc{
if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]){
    [VC_Camera showAlert];
    return;
}

[self init];    
self.picker.delegate = self;
self.picker.allowsEditing = YES;
self.picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

[[VC_Camera getMainWindow] presentViewController:self.picker animated:YES completion:NULL];
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {

self.picker = picker;

DejalActivityView * _activityView = [DejalBezelActivityView activityViewForView:[[UIApplication sharedApplication] keyWindow]  withLabel:@"Loading"];

  [self performSelector:@selector(cancelAfterDelay:) withObject:@{@"DejalAV":_activityView} afterDelay:1.0];

}


- (void) cancelAfterDelay:(NSDictionary*) dict
{

DejalActivityView* _activityView = [dict objectForKey:@"DejalAV"];

[DejalBezelActivityView removeViewAnimated:YES];

[self.picker dismissViewControllerAnimated:YES completion:nil];
}

谢谢:D

[UPDATE]

我尝试将UIImagePickerController用作单例:

-(UIImagePickerController *) imagePicker{
if(!_imagePicker){
   _imagePicker = [[UIImagePickerController alloc] init];
   _imagePicker.delegate = self;
   if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
       _imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
   }
   else{
       _imagePicker.sourceType =UIImagePickerControllerSourceTypePhotoLibrary;
   }  
}
return _imagePicker;
}

问题仍然存在。

1 个答案:

答案 0 :(得分:0)

这是一个非常晚的响应,但对于那些仍在努力解决这个问题的人:我注意到,当某些东西要么备份主线程,要么影响单独线程上的图形上下文时,这似乎就会发生。那些可能是开始寻找的地方。