How to rotate screen with the `var shouldAutorotate` returns false

Question

How to set the specified page rotation without having it rotate automatically? I found that the screen can rotate only when var shouldAutorotate returns yes, but I don't want to do that automatically,I want to control the moment of rotate by myself

I set VC's static variable ‘canRotate’, set it to true when it needs to be rotated, and set it to fals after the rotation is complete. `override var shouldAutorotate: Bool { return canRotate }` — kivan cheng, May 14 '19 at 01:58
the `canRotate` is seted false after received the UIDevice.orientationDidChangeNotification, and I found that the screen can't rotate sometime in iphoneX, iOS 12.1 when `orientationDidChangeNotification` comes (Although this is a small probability event) — kivan cheng, May 14 '19 at 01:59
the rotate screen code: ```UIDevice.current.setValue(UIInterfaceOrientation.landscapeRight.rawValue, forKey: "orientation")``` — kivan cheng, May 14 '19 at 01:59
I resolved it use this before rotate code: ```if !UIDevice.current.isGeneratingDeviceOrientationNotifications { UIDevice.current.beginGeneratingDeviceOrientationNotifications() }``` — kivan cheng, May 20 '19 at 12:39

score 0 · Answer 1 · answered May 14 '19 at 08:52

Swift 4+:

Use following code to rotate screen when required without any auto rotation as you want.

func rotateToLandscapeRight() {               
   UIDevice.current.setValue(UIInterfaceOrientation.landscapeRight.rawValue, forKey: "orientation")
}

func rotateToLandscapeLeft() {
    UIDevice.current.setValue(UIInterfaceOrientation.landscapeLeft.rawValue, forKey: "orientation")
}

func rotateToPortratit() {                
    UIDevice.current.setValue(UIInterfaceOrientation.portrait.rawValue, forKey: "orientation")
}

How to rotate screen with the `var shouldAutorotate` returns false

1 Answers1