第三方开源代码

https://github.com/soffes/SAMKeychain

使用方法

//获取设备信息32 位字符串

-(NSString *)getDeviceString{

    NSString * deviceUUIDStr = [SAMKeychain passwordForService:@"你的app   bundle identifier" account:@"uuid"];

    if (deviceUUIDStr == nil || [deviceUUIDStr isEqualToString:@""])

    {

        deviceUUIDStr = [[[UIDevice currentDevice].identifierForVendor.UUIDString stringByReplacingOccurrencesOfString:@"-" withString:@""] lowercaseString];

        [SAMKeychain setPassword: deviceUUIDStr  forService:@"你的app   bundle identifier"account:@"uuid"];

    }

    return deviceUUIDStr;

}

iOS获取设备唯一编号，就算删除app从新安装也不变的方法