xcode 如何检查设备是否为 iPad 3？
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how do I check if the device is iPad 3?
提问by AbhinavVinay
Possible Duplicate:
Detecting iPad 3 vs iPad 2 device?
Programmatically detect an iPad 3 (HD)?
I am making an iPad app and want to know if the app is running in an iPad 2 or 3 so accordingly I can perform some action.
我正在制作一个 iPad 应用程序，想知道该应用程序是在 iPad 2 还是 iPad 3 上运行，因此我可以执行一些操作。
What would be the best way to find this?
找到这个的最好方法是什么？
I am currently using
我目前正在使用
NSString *platform = [[UIDevice currentDevice] platformString];
But it returns "Unknown iPad" when I run on iPad 3.
但是当我在 iPad 3 上运行时它返回“Unknown iPad”。
回答by rickster
It's generally best to check for the device features you're interested in rather than looking for a specific model of device. Apple recommends this, and for good reason: if you design for features of the new iPad, your customers won't be happy if Apple releases another device with those features and your app doesn't support them.
通常最好检查您感兴趣的设备功能，而不是寻找特定型号的设备。Apple 建议这样做，并且有充分的理由：如果您针对新 iPad 的功能进行设计，如果 Apple 发布具有这些功能的另一台设备而您的应用程序不支持它们，您的客户将不会高兴。
If you need to determine whether you're on an iPad, check UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad. If you need to see if you have a Retina display, check [UIScreen mainScreen].scale. Combine the two and you can find out if you're on an iPad with Retina display.
如果您需要确定您是否使用 iPad，请检查UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad。如果您需要查看是否有 Retina 显示屏，请检查[UIScreen mainScreen].scale。将两者结合起来，您就可以确定您是否使用的是配备 Retina 显示屏的 iPad。
If you need other features specific to the new iPad, look in the API for those features: AV Foundation can tell you about the capabilities of the built-in camera, for example. There's probably some way to check for LTE, too, but I'm not aware of it.
如果您需要特定于新 iPad 的其他功能，请查看这些功能的 API：例如，AV Foundation 可以告诉您有关内置摄像头的功能。也可能有一些方法可以检查 LTE，但我不知道。
