刚刚发现，UIDevice uniqueIdentifier属性在iOS 5中已弃用，在iOS 7及以上版本中不可用。似乎没有可供选择的方法或属性。
我们现有的许多应用程序都紧密依赖于这个属性来唯一地识别特定的设备。今后我们该如何处理这个问题?
2011-2012年的文件建议:
特殊注意事项 不要使用uniqueIdentifier属性。创建特定的唯一标识符 你可以调用CFUUIDCreate函数来创建一个UUID，然后写入 使用NSUserDefaults类将它转换到默认数据库。
但是，如果用户卸载和重新安装应用程序，这个值就不一样了。
当前回答
这是我用来获取iOS 5和iOS 6,7的ID的代码:
- (NSString *) advertisingIdentifier
{
if (!NSClassFromString(@"ASIdentifierManager")) {
SEL selector = NSSelectorFromString(@"uniqueIdentifier");
if ([[UIDevice currentDevice] respondsToSelector:selector]) {
return [[UIDevice currentDevice] performSelector:selector];
}
}
return [[[ASIdentifierManager sharedManager] advertisingIdentifier] UUIDString];
}
其他回答
+ (NSString *) getUniqueUUID {
NSError * error;
NSString * uuid = [KeychainUtils getPasswordForUsername:kBuyassUser andServiceName:kIdOgBetilngService error:&error];
if (error) {
NSLog(@"Error geting unique UUID for this device! %@", [error localizedDescription]);
return nil;
}
if (!uuid) {
DLog(@"No UUID found. Creating a new one.");
uuid = [IDManager GetUUID];
uuid = [Util md5String:uuid];
[KeychainUtils storeUsername:USER_NAME andPassword:uuid forServiceName:SERVICE_NAME updateExisting:YES error:&error];
if (error) {
NSLog(@"Error getting unique UUID for this device! %@", [error localizedDescription]);
return nil;
}
}
return uuid;
}
你可以通过以下代码实现:uidevice -with- uniqueidentifier -for ios -5
给你一个小技巧:
/**
@method uniqueDeviceIdentifier
@abstract A unique device identifier is a hash value composed from various hardware identifiers such
as the device’s serial number. It is guaranteed to be unique for every device but cannot
be tied to a user account. [UIDevice Class Reference]
@return An 1-way hashed identifier unique to this device.
*/
+ (NSString *)uniqueDeviceIdentifier {
NSString *systemId = nil;
// We collect it as long as it is available along with a randomly generated ID.
// This way, when this becomes unavailable we can map existing users so the
// new vs returning counts do not break.
if (([[[UIDevice currentDevice] systemVersion] floatValue] < 6.0f)) {
SEL udidSelector = NSSelectorFromString(@"uniqueIdentifier");
if ([[UIDevice currentDevice] respondsToSelector:udidSelector]) {
systemId = [[UIDevice currentDevice] performSelector:udidSelector];
}
}
else {
systemId = [NSUUID UUID];
}
return systemId;
}
这是我用来获取iOS 5和iOS 6,7的ID的代码:
- (NSString *) advertisingIdentifier
{
if (!NSClassFromString(@"ASIdentifierManager")) {
SEL selector = NSSelectorFromString(@"uniqueIdentifier");
if ([[UIDevice currentDevice] respondsToSelector:selector]) {
return [[UIDevice currentDevice] performSelector:selector];
}
}
return [[[ASIdentifierManager sharedManager] advertisingIdentifier] UUIDString];
}
使用上面提到的SSKeychain和代码。下面是复制/粘贴(添加SSKeychain模块)的代码:
+(NSString *) getUUID {
//Use the bundle name as the App identifier. No need to get the localized version.
NSString *Appname = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleName"];
//Check if we have UUID already
NSString *retrieveuuid = [SSKeychain passwordForService:Appname account:@"user"];
if (retrieveuuid == NULL)
{
//Create new key for this app/device
CFUUIDRef newUniqueId = CFUUIDCreate(kCFAllocatorDefault);
retrieveuuid = (__bridge_transfer NSString*)CFUUIDCreateString(kCFAllocatorDefault, newUniqueId);
CFRelease(newUniqueId);
//Save key to Keychain
[SSKeychain setPassword:retrieveuuid forService:Appname account:@"user"];
}
return retrieveuuid;
}
