在加载时检测方向

Question

When my simulator is in portrait and when my viewcontroller loads initially , it prints out Landscape instead of Portrait but when I change the orientaiton, it correctly displays the orientation so forth. I did the following

override func viewDidLayoutSubviews() {
  super.viewDidLayoutSubviews()

  if (UIDevice.current.orientation == UIDeviceOrientation.portrait || UIDevice.current.orientation == UIDeviceOrientation.portraitUpsideDown)
  {
    print("Portrait")
  }
  else
  {
    print("Landscape")
  }
}

I have no idea why it is displaying wrong orientation when it loads initially but once I rotate everything seems to work.

PS It seems like when simulator initially loads, the orientaiton is unknown , so it is choosing the else condition , how to avoid this from happening and identify the correct orientaiton?

Answer 1

您可以通过UIApplication.shared.statusBarOrientation.isPortrait或UIApplication.shared.statusBarOrientation.isLandscape检查当前方向。

Answer 2

if UIDevice.currentDevice().orientation.isLandscape.boolValue {
    print("landscape")
} else {
    print("portrait")
}