Present view controller modally over current context programmatically using swift

Question

I am using following code to present a view controller modally. I have changed presentation style to "Over current Context". It works fine on iOS 8 but screen gets black on os < 8. I know Over Current Context is available only in iOS 8. My question is how can I achieve this in iOS 7.

let vc = self.storyboard.instantiateViewControllerWithIdentifier("markerView") as! MarkerViewController

self.presentViewController(vc, animated: false, completion: nil)

Answer 1

You have to use Current Context for iOS 7.

To check the iOS-Version you can use NSFoundationVersionNumber.

let iOS7 = floor(NSFoundationVersionNumber) <= floor(NSFoundationVersionNumber_iOS_7_1)
let iOS8 = floor(NSFoundationVersionNumber) > floor(NSFoundationVersionNumber_iOS_7_1)

Then you can check which version is running and use OverCurrentContext or CurrentContext.

if iOS8 {
  self.modalPresentationStyle = UIModalPresentationStyle.OverCurrentContext
} else {
  self.modalPresentationStyle = UIModalPresentationStyle.CurrentContext
}