Question

我试图在我的应用上拍摄照片后解除预览。我只想按下快门按钮，然后回到显示UIViewController的{{1}}，而不显示图像预览和“重拍”和“使用照片”按钮。我正在使用此代码：

UIImagePickerController

并在- (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]; }我正在尝试使用didFinishPickingMediaWIthInfo但是它没有任何影响。任何人都可以给我一些指示，请问如何解决这个问题？

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

Answer 1

在viewDidLoad

中添加此代码

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

然后实现此方法

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;
}

Answer 2

您确定已使用精确签名实施该方法：- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info？因为[self dismissViewControllerAnimated:YES completion:nil];和[self.picker dismissViewControllerAnimated:YES completion:nil];都应该在你的情况下解雇选择控制器。

Answer 3

想要发布此内容，其他人认为它很有用。 [self.picker dismissViewControllerAnimated:YES completion:nil];确实有用，必须放在- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info中，但如果您使用默认的相机控件，它将始终显示＆＃34; Retake＆＃34;和＆＃34;使用Photo＆＃34;在调用之前 - （void）imagePickerController：（UIImagePickerController *）picker didFinishPickingMediaWithInfo：（NSDictionary *）info。解决此问题的方法是设置self.picker.showsCameraControls=NO;并在UIButton中添加cameraOverlayView来调用[self.picker takePicture]。现在工作。谢谢你们

拍摄照片并试图解除didFinishPickingMediaWIthInfo中的预览

3 个答案: