xcode - 将mimetype转换为文件扩展名

如何在xcode中将mimetype转换为文件扩展名
例如我有此代码

File Extension     MIME Type

aifc                audio/x-aiff
avi                 video/x-msvideo
gz                  application/x-gzip
jpg                 image/jpeg

Xcode

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
        NSString *mime      = [response MIMEType];
        NSString *extension = @"" // how to covert it ?!
}

最佳答案

包括<MobileCoreServices/MobileCoreServices.h>或<CoreServices/CoreServices.h>
然后只是以下代码：

CFStringRef mimeType = (CFStringRef)@"audio/x-aiff";
CFStringRef uti = UTTypeCreatePreferredIdentifierForTag(kUTTagClassMIMEType, mimeType, NULL);
CFStringRef extension = UTTypeCopyPreferredTagWithClass(uti, kUTTagClassFilenameExtension);