Here is my problem: rotate an iPhone 6 Plus or an iPad to e.g. LandscapeLeft.
Lets say your app has the following code (only for example)
override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {
return UIInterfaceOrientationMask.Portrait
// mine does use All, but with this case you'll understand my question
}
How do I detect if the device should use vertical or horizontal layout when
func willTransitionToTraitCollection(newCollection: UITraitCollection, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator)
is called?
print(UIScreen.mainScreen().bounds.width < UIScreen.mainScreen().bounds.height)
// will return false, because we started in landscape but the layout will be forced to be vertical here
print(UIApplication.sharedApplication().statusBarOrientation == .LandscapeLeft)
// will return true, because we started in landscape but the layout will be forced to be vertical here
The main problem appears on the iPad, because both size classes are regular.
I'm confused and have no idea how to solve this issue.
Don't think of your layouts as vertical and horizontal. Just let the app rotate, and respond to the size class or the size change.
On the iPad, try to avoid having two layouts. Just use autolayout to rejigger the proportions automatically. But if you must respond to rotation on the iPad, then respond to viewWillTransitionToSize (because the trait collection won't change).