带有覆盖的iOS 7 UIImagePickerController - 重新拍摄并使用不可用的照片

Question

Even though I set userInteractionsEnabled to NO and my overlayframe is cleary not overlapping the buttons, I cannot click them.

Code:

    // Init Picker
    UIImagePickerController* picker = [[UIImagePickerController alloc] init];

    //Create camera overlay for square pictures
    CGFloat navigationBarHeight = picker.navigationBar.bounds.size.height + 25;
    CGFloat height = picker.view.bounds.size.height - 2 * navigationBarHeight;
    CGFloat width = picker.view.bounds.size.width;
    CGRect f = CGRectMake(0, navigationBarHeight, width, height);
    CGFloat barHeight = (f.size.height - f.size.width) / 2;
    UIGraphicsBeginImageContext(f.size);
    [[UIColor colorWithRed:0 green:0 blue:0 alpha:0.7] set];
    UIRectFillUsingBlendMode(CGRectMake(0, 0, f.size.width, barHeight), kCGBlendModeNormal);
    UIRectFillUsingBlendMode(CGRectMake(0, f.size.height - barHeight, f.size.width, barHeight - 4), kCGBlendModeNormal);
    UIImage *overlayImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    UIImageView *overlayIV = [[UIImageView alloc] initWithFrame:f];

    // Disable all user interaction on overlay
    [overlayIV setUserInteractionEnabled:NO];
    [overlayIV setExclusiveTouch:NO];
    [overlayIV setMultipleTouchEnabled:NO];

    // Map generated image to overlay
    overlayIV.image = overlayImage;

    // Present Picker
    picker.modalPresentationStyle = UIModalPresentationCurrentContext;
    picker.delegate = self;
    picker.sourceType = UIImagePickerControllerSourceTypeCamera;
    if([UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceFront]) {
        picker.cameraDevice = UIImagePickerControllerCameraDeviceFront;
    }
    [picker.cameraOverlayView addSubview:overlayIV];

    [self presentViewController:picker animated:YES completion:nil];

Any ideas?

Answer 1

change this: [picker.cameraOverlayView addSubview:overlayIV];

to: [picker setCameraOverlayView:overlayIV];

Answer 2

i had the same problem, but my solution was slightly different. i was using xib files and the appropriate views and buttons were indeed in the correct hierarchy.

but i had to dynamically create a temporary view after the main parent view loaded (viewDidLoad) and add this temp view as the camera overlay. then i added the buttons as a subview to this temp view.

 - (void)viewDidLoad
 {
   ImgPicker = [[UIImagePickerController alloc] init]; 

   if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {

    // note: need to set a manually created view (vOverlay) as the image picker overlay,
    //  and then add the button controls (vControls) to this manually created vOverlay.
    //  Otherwise, the buttons in vControls are not clickable
     UIView *tempView = [[UIView alloc] initWithFrame:ImgPicker.view.frame];
     [tempView addSubview:self.vButtons];

     ImgPicker.cameraOverlayView = tempView;
    }
 }