uiimagepickercontroller - 拍照后无法选择使用照片或重拍

Question

所以我正在尝试为 iOS 7 更新一个应用程序，但我遇到了自定义叠加层的问题。叠加层是我用来构图的图像(实时和使用全分辨率版本在相机胶卷中构图最终结果)。问题是，现在在 iOS 7 下，覆盖层虽然在底部是透明的，但提供了对常规“拍照”按钮的访问，但由于某种原因不允许我点击“使用照片”或“重拍”按钮拍照后出现。这是调用 View Controller 的代码片段:

- (IBAction)takePhoto:(UIButton *)sender {

UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.allowsEditing = NO;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.showsCameraControls = YES;

// Overlay Creation
UIView* overlayView = [[UIView alloc] initWithFrame:picker.view.frame];
    overlayView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"PBOverlayView.png"]];
    [overlayView.layer setOpaque:NO];
    overlayView.opaque = NO;

picker.cameraOverlayView = overlayView;

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

}

Answer 1

另一种方法可能是在 ImagePicker 更改状态时观察通知，并在您进入“使用照片”屏幕时移除(或禁用)您的叠加层。

- (void) addPhotoObservers {
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(removeCameraOverlay) name:@"_UIImagePickerControllerUserDidCaptureItem" object:nil ];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(addCameraOverlay) name:@"_UIImagePickerControllerUserDidRejectItem" object:nil ];
}

- (void) removePhotoObservers {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

-(void)addCameraOverlay {
    if (self.cameraPicker) {
        self.cameraPicker.cameraOverlayView = self.myCameraOverlayView;
    }
}

-(void)removeCameraOverlay {
    if (self.cameraPicker) {
        self.cameraPicker.cameraOverlayView = nil;
    }
}