Question

我过去常常使用老式的方法在相机屏幕上添加叠加层，而且效果很好。但是，自3.1发布以来，Apple坚持要求我使用API添加叠加层。我很快就让叠加层工作，但似乎如果我使用自定义叠加层，那么移动＆amp;调整屏幕没有响应，我只能使用或重拍，实际上不能调整大小和移动。我正在使用的代码如下。我尝试了几种变体，但实际上只有这一点才能实现移动和放大。调整大小是删除添加自定义叠加层视图的行。

有什么想法吗？

UIImage *image = [UIImage imageNamed:@"camera-template-long.png"];
UIImageView *imgView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)] ;
imgView.image = image;

UIView *overlayView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];
overlayView.opaque = NO;
[overlayView addSubview:imgView];

UIImagePickerController* picker = [[UIImagePickerController alloc] init];
picker.sourceType = UIImagePickerControllerSourceTypeCamera;        
picker.showsCameraControls = YES;
picker.cameraOverlayView = overlayView;
picker.delegate = self;
picker.allowsEditing = YES;

[self presentModalViewController:picker animated:YES];

Answer 1

将allowsEditing / showsCameraControls属性设置为NO，将原始视图准备为cameraOverlayView，然后使用takePicture方法。

然后，imagePickerController:didFinishPickingMediaWithInfo:将被直接调用。

请尝试以下代码：

- (void)foo {
  UIImagePickerController *controller = [[[UIImagePickerController alloc] init] autorelease]; 
  controller.sourceType = UIImagePickerControllerSourceTypeCamera; 
  controller.cameraOverlayView = self.cameraOverlay; 
  [self performSelector:@selector(moveOverlayViewToSublayer:) withObject:controller afterDelay:0.1f]; 
  controller.delegate = self; 
  [self presentModalViewController:controller animated:YES]; 
}
- (void) moveOverlayViewToSublayer:(UIImagePickerController*)controller { 
  CALayer *aLayer = self.cameraOverlay.layer.superlayer; 
  controller.cameraOverlayView = nil; 
  [aLayer addSublayer:self.cameraOverlay.layer]; 
}

我希望它能很好地运作。

Answer 2

使用[overlayView setUserInteractionEnabled:NO];停止叠加视图处理输入后，整个问题就消失了。

Answer 3

http://www.techques.com/question/1-10178214/cameraOverlayView-prevents-editing-with-allowsEditing

这对我来说很有效。我试图禁用userInteractionEnabled但是徒劳无功。

Image Move＆amp;使用自定义相机覆盖iPhone SDK 3.1+时调整大小不起作用

3 个答案: