//保存一个UUID字符串到钥匙串：
CFUUIDRef uuid = CFUUIDCreate(NULL);
assert(uuid != NULL);
CFStringRef uuidStr = CFUUIDCreateString(NULL, uuid);
[SAMKeychain setPassword: [NSString stringWithFormat:@"%@", uuidStr]
forService:@"com.yourapp.yourcompany"account:@"user"];
//从钥匙串读取UUID：
NSString *retrieveuuid = [SAMKeychain passwordForService:@"com.yourapp.yourcompany"account:@"user"];
**注意: setPassword和passwordForSevice方法中的**services 和 accounts 参数应该是一致的。
更多详细用法说明可以看SAMKeyChains Documentation
基本的实现思路便是这样，下面是具体的一种具体实现代码，仅供参考。
+ (NSString *)getDeviceId
{
NSString * currentDeviceUUIDStr = [SAMKeychain passwordForService:@" "account:@"uuid"];
if (currentDeviceUUIDStr == nil || [currentDeviceUUIDStr isEqualToString:@""])
{
NSUUID * currentDeviceUUID = [UIDevice currentDevice].identifierForVendor;
currentDeviceUUIDStr = currentDeviceUUID.UUIDString;
currentDeviceUUIDStr = [currentDeviceUUIDStr stringByReplacingOccurrencesOfString:@"-" withString:@""];
currentDeviceUUIDStr = [currentDeviceUUIDStr lowercaseString];
[SAMKeychain setPassword: currentDeviceUUIDStr forService:@" "account:@"uuid"];
}
return currentDeviceUUIDStr;
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持ASPKU。、
注：相关教程知识阅读请移步到IOS开发频道。
