ios - 无法获取图像且没有可见界面

Question

当我使用保存代码时，我收到decalres selector的错误@ interface。我用了 "secondViewController"getcachedirectorypath

 @interface getCacheDirectoryPath : UIImagePickerController

在 .h 文件中。下面是.m文件

-(UIImage *)getImageFromCacheWithName:(NSString *)name
{NSString *_imagePath =[NSString stringWithFormat:@"%@/%@.png",[self     getCacheDirectoryPath],name];

if([[NSFileManager defaultManager]fileExistsAtPath:_imagePath])

{UIImage *_image =[UIImage imageWithContentsOfFile:_imagePath];

    return _image;

}

return nil;