将图像复制到粘贴板将jpeg转码为png

Question

我正在开发一个iPhone应用程序来嵌入/提取jpeg文件中的数据.我想让用户能够将生成的图像复制到剪贴板,但是我正在使用的代码将生成的jpeg转换为png,当它被复制到剪贴板时.

我正在使用下面的代码,有什么我可以做的,以确保它是一点一滴地复制和粘贴的jpeg？

// copy to clipboard
UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
pasteboard.image = [UIImage imageNamed:@"output.jpg"];

提前致谢!

Answer 1

我终于想出了这一个.

// copy to clipboard
UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
NSData *data = [NSData dataWithContentsOfFile:filePath];
[pasteboard setData:data forPasteboardType:@"public.jpeg"];

...

// copy from clipboard
UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
NSData *data = [pasteboard dataForPasteboardType:@"public.jpeg"];
NSString  *copyPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/image.jpg"];
[data writeToFile:copyPath atomically:YES];