UIImagePNGRepresentation（UIImage）拋出libpng錯誤：沒有寫入文件的IDAT

Question

我正在創建一個應用程序，我從瀏覽器中保存縮略圖。一切工作正常，直到我傾向於將包含此文件的目錄移動到其他目錄。 它給這個錯誤：

ImageIO: CGImageRead_mapData 'open' failed '/Users/anuj/Library/Application Support/iPhone Simulator/6.1/Applications/8CD8EB07-6D62-4284-B425-087E821098BC/Library/Caches/PausedVideos/Old School vs. New School/Thumbnail' error = 2 (No such file or directory) ImageIO: CGImageRead_mapData 'open' failed '/Users/anuj/Library/Application Support/iPhone Simulator/6.1/Applications/8CD8EB07-6D62-4284-B425-087E821098BC/Library/Caches/PausedVideos/Old School vs. New School/Thumbnail' error = 2 (No such file or directory) libpng error: No IDATs written into file

繼承人，我使用的代碼：

NSData *data = [NSData dataWithData:UIImagePNGRepresentation(video.Thumbnail)]; 
Thumbnail = [[UIImage imageWithData:data] retain]; 

我也提到了鏈接here但這並沒有改變任何東西。

Answer 1

NSData *data = [NSData dataWithData:UIImagePNGRepresentation(imageview.image)] 
UIImage *img=[UIImage imageWithData:data]; 
[yourImageView setImage:img];