how to change a view from portrait mode to landscape mode and lock it?

Question

I have a movie view compressed at the right-bottom viewport with portrait mode. And the movie view will expand to full screen in landscape mode when user expand the movie view. I also want to lock the movie view to landscape mode when full screen no matter what orientation the device is.

Note: all my other views are in portrait mode.

I've refer to this post with this code,

app setting,

AppDelegate.swift

internal var shouldRotate = false

func application(_ application: UIApplication,
                 supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
    return shouldRotate ? .allButUpsideDown : .portrait
}

view controller,

func expandPlayerWindow(button: UIButton) {
    self.player.view.frame = CGRect(x:0, y:-20, width: UIScreen.main.bounds.maxY, height: UIScreen.main.bounds.maxX)
    let appDelegate = UIApplication.shared.delegate as! AppDelegate
    print(appDelegate.shouldRotate)
    print(self.supportedInterfaceOrientations)
    appDelegate.shouldRotate = true // or false to disable rotation
    let value = UIInterfaceOrientation.landscapeLeft.rawValue
    UIDevice.current.setValue(value, forKey: "orientation")
    print(appDelegate.shouldRotate)
    print(self.supportedInterfaceOrientations)
    appDelegate.shouldRotate = false
    print(appDelegate.shouldRotate)
    print(self.supportedInterfaceOrientations)
    UIApplication.shared.isStatusBarHidden = false
}

log,

false
UIInterfaceOrientationMask(rawValue: 26)
true
UIInterfaceOrientationMask(rawValue: 26)
false
UIInterfaceOrientationMask(rawValue: 26)

I set shouldRotate to true before setorientation, this make view can change to landscape mode. And after set orientation I set shoudRotate to false to disable rotation. Then I test it, when I click the button, the movie view change to landscape, after it I rotate my device the movie view change to portrait, and locked to the portrait mode not the landscape mode.

How about the parent views of the movie view. Are you preventing them from rotating too? — Scott Thompson
Is your movie view the view of a view controller and does the view controller return the proper values for shouldAutorotate and supportedInterfaceOrientations in each mode? — Scott Thompson
There is a parent view of the movie view, and the parent view if a view of view controller. I've check the these and edited in the question. Check it. — LF00

LF00 LF00 · Accepted Answer · 2017-05-10T02:52:46

It's caused by this function,

func application(_ application: UIApplication,
                 supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
    return shouldRotate ? .allButUpsideDown : .portrait
}

change .allButUpsideDown to .landscape will do.

workable code,

AppDelegate.swift

func application(_ application: UIApplication,
                 supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {
    return shouldRotate ? .landscape : .portrait
}

view controller,

func expandPlayerWindow() {
    self.player.view.frame = CGRect(x:0, y:-20, width: UIScreen.main.bounds.maxY, height: UIScreen.main.bounds.maxX)
    let appDelegate = UIApplication.shared.delegate as! AppDelegate
    appDelegate.shouldRotate = true // or false to disable rotation
    let value = UIInterfaceOrientation.landscapeLeft.rawValue
    UIDevice.current.setValue(value, forKey: "orientation")
    appDelegate.shouldRotate = true
    UIApplication.shared.isStatusBarHidden = true
}

how to change a view from portrait mode to landscape mode and lock it?

1 Answers