我的应用程序中有一个ImagePickerController.它运行良好,但旁边ipc.delegate = self;出现一条错误消息:
从不兼容的类型'ViewController*const__strong'分配给'id'
该应用程序运行良好,所以我忽略了错误消息,但我想我需要知道原因.为什么会出现错误消息?
ipc = [[UIImagePickerController alloc]init];
ipc.modalPresentationStyle = UIModalPresentationCurrentContext;
ipc.delegate = self;
ipc.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[ipc setAllowsEditing:NO];
[self presentViewController:ipc animated:NO completion:nil];
Run Code Online (Sandbox Code Playgroud) xcode delegates incompatibletypeerror uiimagepickercontroller ios