Pushing a View Controller in a specific orientation

Question

The main UIViewController ( A ) displays another UIViewController ( B ) when the devices rotates to Landscape mode. So rotating the device to landscape while on A presents B modally and rotating back to portrait on B dismisses B and goes back to A .

While on B I want to push another UIViewController ( C ) into A 's stack. C can only be displayed in portrait though. I am aware that this goes against the HIG, as orientation should always be conserved between transitions.

So I want to be able to do the following on B :

• Dissmiss B
• Push C to A 's stack (so popping from C goes back to A )
• Switch back to portrait orientation so C is displayed in portrait

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If you have the Pay With Square app, you'll see that they solved this problem by fading in C (rotate the app to show the map and choose an annotation) but they didn't add it to the current stack, allowing only dismiss it.

Answer 1

您可以像平常一样推动视图控制器，然后在viewDidAppear中使用此线程中的一些代码来旋转视图。