Question

在我以前的应用程序中，我使用下面提到的代码为iOS设备生成唯一的deviceId。但问题是，每次重新安装应用程序时它都会生成一个新代码。我该如何正确地执行此操作？

-(NSString*)uniqueIDForDevice //new..
{
    NSString* uniqueIdentifier = nil;
    if( [UIDevice instancesRespondToSelector:@selector(identifierForVendor)] ) { // >=iOS 7
        uniqueIdentifier = [[[UIDevice currentDevice] identifierForVendor] UUIDString];
    }
    else
    { //<=iOS6, Use UDID of Device
        CFUUIDRef uuid = CFUUIDCreate(NULL);
        //uniqueIdentifier = ( NSString*)CFUUIDCreateString(NULL, uuid);- for non- ARC
        uniqueIdentifier = ( NSString*)CFBridgingRelease(CFUUIDCreateString(NULL, uuid));// for ARC
        CFRelease(uuid);
    }

    return uniqueIdentifier;
}

Answer 1

首先获得vendorId（uniqueID）而不是将其存储到keychain

// Fetch vendorID from keychain first, if it exists then use it or fetch vendorID 

//if user delete app and again install app than he get vendorID from keychain(if he hasn't cleared it)

NSString *vendorID = [UICKeyChainStore stringForKey:@"KEY TO SAVE TO Keychain" service:nil];
NSLog(@"VendorID from Keychain - %@",vendorID);

//if vandorid from keychain is not nil
if (vendorID)
{
    [[NSUserDefaults standardUserDefaults] setObject:vendorID forKey:@"vendorId"];
    [[NSUserDefaults standardUserDefaults] synchronize];
}

//else it goes for new vendorid and then stored it to keychan
else
{
    vendorID = [[[UIDevice currentDevice] identifierForVendor] UUIDString];

    [UICKeyChainStore setString:vendorID forKey:@"KEY TO SAVE TO Keychain"  service:nil];

    [[NSUserDefaults standardUserDefaults] setObject:vendorID forKey:@"vendorId"];
    [[NSUserDefaults standardUserDefaults] synchronize];
    NSLog(@"VendorID Local - %@",vendorID);
}

我使用this类来保存和检索来自keyChain的vendorID！

只需看看这个。它会帮助你

Answer 2

您可以使用以下

+ (NSString *)deviceUUID
{
    if([[NSUserDefaults standardUserDefaults] objectForKey:[[NSBundle mainBundle] bundleIdentifier]])
        return [[NSUserDefaults standardUserDefaults] objectForKey:[[NSBundle mainBundle] bundleIdentifier]];

    @autoreleasepool {

        CFUUIDRef uuidReference = CFUUIDCreate(nil);
        CFStringRef stringReference = CFUUIDCreateString(nil, uuidReference);
        NSString *uuidString = (__bridge NSString *)(stringReference);
        [[NSUserDefaults standardUserDefaults] setObject:uuidString forKey:[[NSBundle mainBundle] bundleIdentifier]];
        [[NSUserDefaults standardUserDefaults] synchronize];
        CFRelease(uuidReference);
        CFRelease(stringReference);
        return uuidString;
    }
}

Answer 3

使用This链接到UICKeyChainStore。我添加了以下方法调用

appDelegate应用程序[self getDeviceIdFromKeychain];

中的

didFinishLaunchingWithOptions

-(void)getDeviceIdFromKeychain
{
    NSString *deviceID = [UICKeyChainStore stringForKey:DEVICE_ID_FROM_KEYCHAIN_REFERENCE_APP service:nil];
    NSLog(@"deviceID from Keychain = (%@)",deviceID);

    //if vandorid from keychain is not nil
    if (deviceID)
    {
        [[NSUserDefaults standardUserDefaults] setObject:deviceID forKey:DEVICE_ID];
        [[NSUserDefaults standardUserDefaults] synchronize];
    }
//else it goes for new vendorid and then stored it to keychan
else if (deviceID == (id)[NSNull null] || deviceID.length == 0 )
{
    NSString *newDeviceId;
    newDeviceId=[[self class] deviceUUID];
    [[NSUserDefaults standardUserDefaults] setObject:newDeviceId forKey:DEVICE_ID];
    [[NSUserDefaults standardUserDefaults] synchronize];
    [UICKeyChainStore setString:newDeviceId forKey:DEVICE_ID_FROM_KEYCHAIN_REFERENCE_APP  service:nil];
    NSLog(@"new deviceID = (%@)",newDeviceId);
}

}
+ (NSString *)deviceUUID
{
    if([[NSUserDefaults standardUserDefaults] objectForKey:[[NSBundle mainBundle] bundleIdentifier]])
        return [[NSUserDefaults standardUserDefaults] objectForKey:[[NSBundle mainBundle] bundleIdentifier]];

    @autoreleasepool {

        CFUUIDRef uuidReference = CFUUIDCreate(nil);
        CFStringRef stringReference = CFUUI

DCreateString(nil, uuidReference);
        NSString *uuidString = (__bridge NSString *)(stringReference);
        [[NSUserDefaults standardUserDefaults] setObject:uuidString forKey:[[NSBundle mainBundle] bundleIdentifier]];
        [[NSUserDefaults standardUserDefaults] synchronize];
        CFRelease(uuidReference);
        CFRelease(stringReference);
        return uuidString;
    }
}

我使用它们就像这样......（在我的signinViewcontroller中）

NSString *deviceIDfromNSUserDefaults = [[NSUserDefaults standardUserDefaults]valueForKey:DEVICE_ID ];
    NSLog(@"deviceID from NSUserDefaults = (%@)",deviceIDfromNSUserDefaults);

Answer 4

我正在使用UUID生成唯一编号。如果我们不在应用程序中使用iAd，我怀疑是否允许使用供应商ID。我通过生成UUID然后存储到钥匙串中来实现这一点。钥匙串将存储您的UUID，直到用户不会进行硬重置，这种情况很少见。

由于Apple没有提供API来获取唯一的设备ID，我们必须找到这样的方法。

如何为iOS设备生成和使用唯一的deviceId？

4 个答案: