How do I make a snapshot without the navigation bar in iOS with Swift?

问题

I'm using this function I've found in this site but it saves the whole screen with the navigation bar but no the status bar.

func screenShotMethod() {


    let layer = UIApplication.sharedApplication().keyWindow!.layer
    let scale = UIScreen.mainScreen().scale
    UIGraphicsBeginImageContextWithOptions(layer.frame.size, false, scale);

    layer.renderInContext(UIGraphicsGetCurrentContext()!)
    let screenshot = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()

    UIImageWriteToSavedPhotosAlbum(screenshot, nil, nil, nil)

    let alertSaved = UIAlertController(title: "Saved", message: "", preferredStyle: .ActionSheet)

    alertSaved.addAction(UIAlertAction(title: "Ok", style: .Default, handler: {action in

        self.view.removeGestureRecognizer(self.gesture)

    }))

    presentViewController(alertSaved, animated: true, completion: nil)

}

What I need is just take a snapshot from the end of the navigation bar to the bottom.

回答1:

If you change the layer you are attempting to screenshot from the keyWindow's view to your view controller's view, the navigation bar (assuming you have your view controller embedded in a navigation controller rather than adding a nav bar as a subview of your view) and the status bar will be omitted from the screenshot.

let layer = view.layer

If you have blank space at the top where the navigation bar was, you can adjust the frame to cut this out.

来源：https://stackoverflow.com/questions/34077806/how-do-i-make-a-snapshot-without-the-navigation-bar-in-ios-with-swift