objective-c - 从不兼容类型 'id' 分配给 'CameraVIewController*' '

Question

Assigning to id<UINavigationControllerDelegate,UIImagePickerControllerDelegate> from incompatible type CameraViewController* picker.delegate = self; 附近显示警告行

-(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(protocol)才能使用图像选择器。