Ios 忽略UIImagePickerController上的中心手势

我正在尝试定制

UIImagePickerController

。我想，当

UIImagePickerController

的摄像头启动时，它只会忽略所有挤压动作

以下是我尝试过的，但它不起作用：我添加了一个叠加，并识别出与之相关的捏手势。问题是，覆盖还禁用了所有其他手势：

@interface ViewController : UIViewController  <UIImagePickerControllerDelegate, UINavigationControllerDelegate>
@property (nonatomic, strong) UIImagePickerController *picker;
@end

---

doPinch

是一种不执行任何操作的方法

self.picker.showsCameraControls=NO

在
cameraOverlay
中自定义您的相机控件，您的意思是我需要自己在
cameraOverlay
中实现相机控件吗？
self.picker = [[UIImagePickerController alloc] init];
self.picker.delegate = self;
self.picker.sourceType = UIImagePickerControllerSourceTypeCamera;
self.picker.showsCameraControls = YES;

CGRect screenBounds = [[UIScreen mainScreen] bounds];
screenBounds.size.height -= 100;
UIView *cameraOverlay = [[UIView alloc] initWithFrame:screenBounds];

UIPinchGestureRecognizer *pinchRec = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(doPinch)];
[cameraOverlay addGestureRecognizer:pinchRec];
[self.picker.view addSubview:cameraOverlay];