iOS 7在不同的应用程序中显示不同的UDID [英] iOS 7 showing different UDIDs in different applications

问题描述

我正在使用此代码在我的应用中获取iOS 7设备的UDID

I am using this code to get the UDID of iOS 7 device in my app

+(NSString*)uniqueIDForDevice
{
    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;
}

但其他应用程序中的相同代码显示另一个UDID。如何在整个iPad中获得唯一的标识符，无论应用程序如何？

But the same code in other applications shows another UDID. How can I get the unique identifier which will be the same throughout the iPad irrespective of the application?

推荐答案

你不能。

identifierForVendor 只会为该设备上的同一个开发者提供相同的应用标识符。它不能保证是永久性的;如果您从供应商中删除所有应用程序，然后重新安装它们，则可能会获得不同的标识符。

identifierForVendor will only give you the same identifier for apps from the same developer on that device. And it's not guaranteed to be permanent; if you delete all the apps from the vendor, and then reinstall them, it's likely you'll get a different identifier.

至于您的iOS6实施，那不会给你任何永久性的东西，因为UUID的意思是每次都给你一个独特的字符串。

As for your iOS6 implementation, that's not going to give you anything permanent, as the point of a UUID is to give you a unique string every time.

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