检测iPad应用程序的iPad 2x按钮 [英] detect iPad 2x button for iPhone app

问题描述

有没有办法检测到你的iPhone应用程序我们在iPad上运行2x / 1x？

Is there a way to detect that your iPhone app us running 2x/1x on an iPad?

我需要能够检测到每英寸点数的差异对于我的应用程序。

I need to be able to detect the difference in points per inch for my app.

推荐答案

您可以通过注册通知来检测更改 _UIClassicApplicationWillChangeZoomNotificationName 然后使用或多或少的@magma在他的回答中概述的方法来处理规模变化。 _UIClassicApplicationWillChangeZoomNotificationName 会告诉您何时使用2x/1x按钮更改比例。

You can detect the change by registering for the notification _UIClassicApplicationWillChangeZoomNotificationName and then handle the scale change using more or less the method outlined by @magma in his answer. _UIClassicApplicationWillChangeZoomNotificationName will tell you when the "2x"/"1x" button has been used to change the scale.

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