对于UIImagePickerControllerSourceTypePhotoLibrary没有可见的@interface for'CameraTakePictureOverlay'

Question

无法使用访问UIImagePickerControllerSourceTypePhotoLibrary按钮覆盖这里是我得到的问题是在选择器（takeLib :)中。使用属性为imagePicker

@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; 
} 

这里的选择是哪里出现问题

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

错误陈述

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

Answer 1

从什么超阶级你继承CameraTakePictureOverlay？
超级班应该是UIViewController。 UIImagePickerController文档

提供用户界面。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，以模式（全屏）方式执行此操作，将已配置的图像选取器控制器作为新视图控制器传递。