我试图从nib加载一个View，配置它，并拍摄它的快照，而不是将它添加到屏幕上:+(void)composeFromNibWithImage:(UIImage*)catImagecompletion:(CompletionBlock)completion{NSArray*nibContents=[[NSBundlemainBundle]loadNibNamed:@"CatNib"owner:niloptions:nil];CatView*catView=[nibContentsfirstObject];//here,catViewisthecorrectsizefromthenib,b