如何使用iOS创建GUID/UUID

import Foundation

let uuid = UUID()
print("UUID: \(uuid)")

#import<Foundation/Foundation.h>

CFUUIDRef uuidRef = CFUUIDCreate(kCFAllocatorDefault);
NSString *uuidString = (__bridge_transfer NSString *)CFUUIDCreateString(kCFAllocatorDefault, uuidRef);
CFRelease(uuidRef);

NSLog(@"UUID: %@", uuidString);