UIImagePickerControllerSourceTypePhotoLibrary 的“CameraTakePictureOverlay”没有可见的@interface

Question

在使用访问 UIImagePickerControllerSourceTypePhotoLibrary 按钮覆盖时遇到问题是我得到的，问题出在选择器 (takeLib:) 中。

使用 imagePicker 的属性

@property (weak, nonatomic) UIImagePickerController *imagePicker;

- (UIButton *) createGetLibraryButton {

UIImage *imglibraryPicture = [StyleKit imageOfLibraryIcon];



CGRect bounds = [UIScreen mainScreen].bounds;

CGRect takePicRect = CGRectMake((bounds.size.width/2) - (imglibraryPicture.size.width/1),
                                bounds.size.height-imglibraryPicture.size.height/2-CAMERA_BOTTOM_BUTTON_PADDING,
                                imglibraryPicture.size.width/2,
                                imglibraryPicture.size.height/2);

UIButton *btnLibrary = [[UIButton alloc] initWithFrame:takePicRect];

//using  selector(takeLib:)
[btnLibrary setBackgroundImage:imglibraryPicture forState:UIControlStateNormal];
[btnLibrary addTarget:self action:@selector (takeLib:) forControlEvents:UIControlEventTouchUpInside];

return btnLibrary;
}

这里的选择器是问题发生的地方

-(void) takeLib:(id)sender
{
self.imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
self.imagePicker.delegate = self;
[self presentViewController:self.imagePicker animated:YES completion:^{
  }];
}

错误说明： No visible @interface for 'CameraTakePictureOverlay' declares the selector 'presentViewController:animated:completion:'

Answer 1

你从哪个超类继承CameraTakePictureOverlay？
超级类应该是UIViewController。 UIImagePickerController文档

展示用户界面。在 iPhone 或 iPod touch 上，通过调用当前活动视图控制器的 presentViewController:animated:completion: 方法以模态方式（全屏）执行此操作，将您配置的图像选择器控制器作为新的视图控制器传递。