从不兼容类型'CameraVIewController *''</uinavigationcontrollerdelegate，uiimagepickercontrollerdelegate>分配给'id <uinavigationcontrollerdelegate，uiimagepickercontrollerdelegate>'

Question

Assigning to id<UINavigationControllerDelegate,UIImagePickerControllerDelegate> from incompatible type CameraViewController*警告显示在picker.delegate = self;行附近

-(IBAction) getPhoto:(id) sender {
UIImagePickerController * picker = [[UIImagePickerController alloc] init];
picker.delegate = self;

if((UIButton *) sender == takePhoto) {
    picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
} else {
    //picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
   picker.sourceType = UIImagePickerControllerSourceTypeCamera;
}

[self presentModalViewController:picker animated:YES];

}

Answer 1

请注意，您必须同时遵守UIImagePickerControllerDelegate和UINavigationControllerDelegate协议才能使用图片选择器。

Answer 2

只需添加两种协议。

@interface MyViewController : UIViewController <UIImagePickerControllerDelegate, UINavigationControllerDelegate>

然后显然设置委托。 ：）

Answer 3

The documentation for UIImagePickerController表示委托必须实施UIImagePickerControllerDelegate协议。您的CameraViewController要么没有实现此协议，要么没有声明它在标题中这样做。