Swift: Cropping a Screenshot without TabBar and NavigationBar

Question

I have a screenshot of the entire screen, screenshot, generated using the following:

let layer = UIApplication.sharedApplication().keyWindow!.l         


        

Answer 1

You have two options here: First, you can take the screenshot using UIApplication.sharedApplication().keyWindow then we will have this:

    UIGraphicsBeginImageContext(UIApplication.sharedApplication().keyWindow!.bounds.size)
    UIApplication.sharedApplication().keyWindow!.layer.renderInContext(UIGraphicsGetCurrentContext())
    let screenshot = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()

So, you will have to crop the image like this:

    let yPosition = self.navigationController!.navigationBar.frame.height + UIApplication.sharedApplication().statusBarFrame.size.height
    let crop = CGRectMake(0, yPosition,
            self.view.bounds.width, 
            self.view.bounds.height)
    let cgImage = CGImageCreateWithImageInRect(screenshot.CGImage, crop)
    let image: UIImage = UIImage(CGImage: cgImage)!

The second option is to take the screenshot directly of your view, like this:

    UIGraphicsBeginImageContext(self.view!.bounds.size)
    self.view!.layer.renderInContext(UIGraphicsGetCurrentContext())
    let screenshot = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()

In this case, you don't need to crop the navigationBar.

This is a sample code at github https://github.com/gazolla/crop