ios - 拍照并尝试关闭 didFinishPickingMediaWIthInfo 中的预览

Question

在我的应用程序上拍摄照片后，我试图关闭预览。我只想按下快门按钮，然后弹回显示 UIImagePickerController 的 UIViewController，而不显示图像预览以及“重拍”和“使用照片”按钮。我正在使用这段代码:

- (IBAction)pushTakePhoto:(id)sender {

    self.picker = [[UIImagePickerController alloc] init];
    self.picker.delegate = self;
    self.picker.sourceType = UIImagePickerControllerSourceTypeCamera;
    self.picker.cameraDevice=UIImagePickerControllerCameraDeviceFront;



    UIImage *catEars = [UIImage imageNamed:@"cameraoverlay"];//320*101
    UIImageView *overlayImageView = [[UIImageView alloc] initWithImage:catEars];
    CGRect screenRect = [[UIScreen mainScreen] bounds];
    self.earsX = screenRect.size.width/2-overlayImageView.frame.size.width/2;
    self.earsY = 120;
    self.earsWidth = overlayImageView.frame.size.width;
    self.earsHeight = overlayImageView.frame.size.height;

    //bar size is 40 at the top and the bottom one is 101


    overlayImageView.frame=CGRectMake(self.earsX, self.earsY, self.earsWidth, self.earsHeight);
    [self.picker setCameraOverlayView:overlayImageView];

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


}

并且在 didFinishPickingMediaWIthInfo 中，我正在尝试使用 [self.picker dismissViewControllerAnimated:YES completion:nil]; 但是它没有任何影响。谁能给我一些关于如何解决这个问题的建议？

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {

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

}

Answer 1

在viewDidLoad中添加这段代码

 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(loadPhotoCaptured) name:@"_UIImagePickerControllerUserDidCaptureItem" object:nil];

然后实现这个方法

尝试

- (void)loadPhotoCaptured
{
   UIImage *img = [[[self allImageViewsSubViews:[[[picker viewControllers]firstObject] view]] lastObject] image];
    if (img)
    {
        [self imagePickerController:nil didFinishPickingMediaWithInfo:[NSDictionary dictionaryWithObject:img forKey:UIImagePickerControllerOriginalImage]];
    }
    else
    {
        [picker dismissViewControllerAnimated:YES completion:nil];
    }
}                                                                                                                                                   

 - (NSMutableArray*)allImageViewsSubViews:(UIView *)view
{
    NSMutableArray *arrImageViews=[NSMutableArray array];
    if ([view isKindOfClass:[UIImageView class]])
    {
        [arrImageViews addObject:view];
    }
    else
    {
        for (UIView *subview in [view subviews])
        {
            [arrImageViews addObjectsFromArray:[self allImageViewsSubViews:subview]];
        }
    }
    return arrImageViews;
}