iOS获取设备唯一编号，就算删除app从新安装也不变的方法

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;

}