/**
 *  生成32位UUID
 */
- (NSString *)uuidString{
    
    CFUUIDRef uuid_ref = CFUUIDCreate(NULL);
    CFStringRef uuid_string_ref= CFUUIDCreateString(NULL, uuid_ref);
    NSString *uuid = [NSString stringWithString:(__bridge NSString *)uuid_string_ref];
    CFRelease(uuid_ref);
    CFRelease(uuid_string_ref);
    
    //去除UUID ”-“
    NSString *UUID = [[uuid lowercaseString] stringByReplacingOccurrencesOfString:@"-" withString:@""];
    
    NSLog(@"%@", UUID);

    return UUID;
}p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo; color: #4cbf57}p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo; color: #ffffff}p.p3 {margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo; color: #ffffff; min-height: 21.0px}p.p4 {margin: 0.0px 0.0px 0.0px 0.0px; font: 18.0px Menlo; color: #00afca}span.s1 {font-variant-ligatures: no-common-ligatures}span.s2 {font: 18.0px 'PingFang SC'; font-variant-ligatures: no-common-ligatures}span.s3 {font-variant-ligatures: no-common-ligatures; color: #00afca}span.s4 {font-variant-ligatures: no-common-ligatures; color: #ffffff}span.s5 {font-variant-ligatures: no-common-ligatures; color: #c2349b}span.s6 {font-variant-ligatures: no-common-ligatures; color: #e44448}

/**
 *  生成32位UUID
 */
- (NSString *)uuidString{
    
    CFUUIDRef uuid_ref = CFUUIDCreate(NULL);
    CFStringRef uuid_string_ref= CFUUIDCreateString(NULL, uuid_ref);
    NSString *uuid = [NSString stringWithString:(__bridge NSString *)uuid_string_ref];
    CFRelease(uuid_ref);
    CFRelease(uuid_string_ref);
    
    //去除UUID ”-“
    NSString *UUID = [[uuid lowercaseString] stringByReplacingOccurrencesOfString:@"-" withString:@""];
    
    NSLog(@"%@", UUID);

    return UUID;
}