如何从Objective-C中的MIME类型确定合适的文件扩展名

#import <Foundation/Foundation.h>

NSString *getFileExtensionFromMIMEType(NSString *mimeType) {
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSString *extension = (__bridge_transfer NSString *)UTTypeCopyPreferredTagWithClass((__bridge CFStringRef)mimeType, kUTTagClassFilenameExtension);
    return extension;
}

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        NSString *mimeType = @"image/jpeg";
        NSString *fileExtension = getFileExtensionFromMIMEType(mimeType);
        NSLog(@"The appropriate file extension for MIME type %@ is %@", mimeType, fileExtension);
    }
    return 0;
}