iOS. How to enable and disable rotation on each UIViewController?

Question

I have an UIViewController, I want to disable or enable rotation of the screen in different scenarios

Example:

if flag {
   rotateDevice = false
}
e         


        

Answer 1

You simply have to implement shouldAutorotate and supportedInterfaceOrientations into your UIViewController. Take a look at this documentation. For example:

override func shouldAutorotate() -> Bool {
    return true
}

You can also specify which orientations are available. Here is an example with only portraits orientations:

override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {
    return .Landscape
}

Edit: If you want to support different orientation regarding a flag, you just have to do something like this:

override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask {
    if myFlag {
        return .Landscape
    } else {
        return .All
    }
}

(If myFlag is true, it will allow Landscape orientation. Otherwise, it will allow all orientations).

Answer 2

set device orientarion portrait in Target -> General -> Deployment Info -> Portrait