ios 下两种生成唯一字符串的方法

ios 下两种生成唯一字符串的方法

 

CFUUIDRef uuidRef =CFUUIDCreate(NULL);

CFStringRef uuidStringRef =CFUUIDCreateString(NULL, uuidRef);

CFRelease(uuidRef);

NSString *uniqueId = (__bridgeNSString *)uuidStringRef;