xcode 如何将 iOS 应用程序限制为只能使用 4 英寸屏幕设备？
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How do I limit an iOS app only to 4 inch screen devices?
提问by Kyle
Is there a setting in Xcode that lets me declare that my app only supports 4" screen devices (iPhone 5 and the newest iPod Touch)?
Xcode 中是否有设置可以让我声明我的应用程序仅支持 4" 屏幕设备（iPhone 5 和最新的 iPod Touch）？
回答by Undo
Nope.
不。
Because iOS 7 supports devices with 3.5" screens, you can't use the only-support-iOS-x technique.
因为 iOS 7 支持 3.5" 屏幕的设备，所以你不能使用 only-support-iOS-x 技术。
Also, there isn't a setting in Xcode or a key for requiredDeviceCapabilitieswhich allows you to make the app 4-inch only.
此外，Xcode 中没有设置或requiredDeviceCapabilities允许您将应用程序设置为仅 4 英寸的键。
回答by Sr.iOSDev
As you can see in below screenshot which is taken from Apple's official website, iPhone 4 and iPhone 4s are the ones with 3.5 inch screen and they do support iOS 7.
正如你在下面的苹果官网截图中看到的，iPhone 4 和 iPhone 4s 是 3.5 英寸屏幕，它们确实支持 iOS 7。
So you cannot constrain the app resolution support for 4 inch screen only by even using iOS 7.
因此，即使使用 iOS 7，您也无法限制对 4 英寸屏幕的应用分辨率支持。
Also as per the below forum there is no way we can just put application on app store that only supports 4 inch screen iPhone.
同样根据下面的论坛，我们无法将应用程序放在仅支持 4 英寸屏幕 iPhone 的应用程序商店中。
iPhone app for 4-inch screen only?
Let me know if you need more help.
如果您需要更多帮助，请告诉我。
回答by Mengli
Yes. You may not be able to add a setting in Xcode or a key for requiredDeviceCapabilities which allows you to make the app 4-inch only. But you can allow the user launch the application first, then in the very beginning view controller detect screen size by using following code:
是的。您可能无法在 Xcode 中添加设置或 requiredDeviceCapabilities 的键，这使您只能将应用程序设为 4 英寸。但是您可以允许用户先启动应用程序，然后在最开始的视图控制器中使用以下代码检测屏幕大小：
CGRect screenBound = [[UIScreen mainScreen] bounds];
CGSize screenSize = screenBound.size;
CGFloat screenWidth = screenSize.width;
CGFloat screenHeight = screenSize.height;
Last, based on the device screen size you preferred to run your app, you can either disable the next activity or continue.
最后，根据您希望运行应用程序的设备屏幕尺寸，您可以禁用下一个活动或继续。
