advertisingIdentifier和identifierForVendor返回“00000000-0000-0000-0000-000000000000”。

问题描述

我已经实现了这种方法来获取 advertisingIdentifier 和 identifierForVendor ：

I've implemented this methods to get advertisingIdentifier and identifierForVendor:

- (NSString *) advertisingIdentifier
{
    if (!NSClassFromString(@"ASIdentifierManager")) {
        return [OpenUDID value];
    }
    return [[[ASIdentifierManager sharedManager] advertisingIdentifier] UUIDString];
}

- (NSString *) identifierForVendor
{
    if ([[UIDevice currentDevice] respondsToSelector:@selector(identifierForVendor)]) {
        return [[[UIDevice currentDevice] identifierForVendor] UUIDString];
    }
    return @"";
}

- (BOOL)isAdvertisingTrackingEnabled
{
    if (NSClassFromString(@"ASIdentifierManager") && ![[ASIdentifierManager sharedManager] isAdvertisingTrackingEnabled]) {
        return NO;
    }
    return YES;
}

在模拟器上一切正常，我可以获得2个字符串ID代表。

On simulator everything is working as should be and I can get the 2 strings IDs representation.

但是当我从带有iOS 6.0的iPhone 3GS（10A403）运行时，这两种方法返回00000000-0000-0000-0000 -000000000000作为标识符。
已完成：

But when I run from iPhone 3GS with iOS 6.0 (10A403), these 2 methods return "00000000-0000-0000-0000-000000000000" as identifier.Already done:

• 重新启动设备


• 删除应用并重新安装


• 创建，安装，删除并再次安装Ad-Hoc


• 从其他应用运行此代码


• 使用iOS 6.0（10A403）在iPad 2上测试，一切都确定（我有正确的标识符）

• Restarted the device
• Removed the app and reinstalled
• Created and Ad-Hoc build, installed, removed and installed again
• Run this code from another app
• Tested on iPad 2 with iOS 6.0 (10A403) and everything went ok (I've got the correct identifiers)

推荐答案

这似乎是iOS中的一个错误。在已通过无线升级的设备上看到相同的问题，但使用Xcode或iTunes升级的设备按预期工作，没有零。

It appears to be a bug in iOS. Seeing the same issue on devices that have been upgraded over-the-air, but devices upgraded with Xcode or iTunes work as expected without zeros.

尝试过类似的步骤，并且唯一的共同主题是无线（坏）与系留升级（好）。

Tried similar steps as you, and the only common theme was over-the-air (bad) versus tethered upgrade (good).

更新：直接从iOS 5.1到6.1空中体验不同的行为。每次完全关闭并重新启动应用程序时， identifierForVendor 都会返回一个新值。如果应用程序正在卸载并重新安装，则会出现这种情况，但事实并非如此。

Update: Users that move directly from iOS 5.1 to 6.1 over-the-air experience a different behavior. Every time the app is closed completely and restarted, a new value is being returned by identifierForVendor. This would be expected if the app was being uninstalled and reinstalled, but that's not the case.

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