Taking screenshot from part of screen in swift

Question

I Need to take a screenshot of a part of the screen.

This is the code to take a screenshot of the full screen:

    UIGraphicsBeginImageContext(view.frame.size)
    view.layer.renderInContext(UIGraphicsGetCurrentContext())
    let imageRef = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()

But how do I take a screenshot from just a part of the screen?

Thank you

if the part of the screen is a UIView, check this link http://stackoverflow.com/questions/30696307/how-to-convert-a-uiview-to-a-image — Sri Hari YS, Apr 05 '17 at 13:41

score 1 · Answer 1 · answered Jul 13 '15 at 06:56

1: You need to define a context. eg:

UIGraphicsBeginImageContextWithOptions(self.messageTextView.bounds, true, 2.0 )

2: Draw image in context

self.messageTextView.drawViewHierarchyInRect(CGRect(x: 0, y: 0, width: self.messageTextView.bounds.width, height: self.messageTextView.bounds.height), afterScreenUpdates: false)

3: Use newly drawn image

var newImage = UIGraphicsGetImageFromCurrentImageContext()
self.someImageView.image = newImage

You can modify code to take screenshoot for your desired view.

score 0 · Answer 2 · answered Jan 15 '15 at 14:35

0

You do it using .snapshotViewAfterScreenUpdates(BOOL). Like this:

exampleImageView.snapshotViewAfterScreenUpdates(false)

answered Jan 15 '15 at 14:35

Valentin

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Returns a new view object containing a snapshot of the screen’s rendered contents. For further info look Apple Docs: https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIScreen_Class/index.html – Valentin Jan 15 '15 at 16:07

Raksha Saini · Answer 3 · 2017-08-14T11:27:44.020

This is the best way to screenshot part of a screen. try that for twitter and facebook screenshot share functionality.

 func shareButtonClickedToTwitter() {
     UIGraphicsBeginImageContextWithOptions(CGSizeMake(100,150), false, 0)
     var image:UIImage = UIGraphicsGetImageFromCurrentImageContext();
     self.view?.drawViewHierarchyInRect(CGRectMake(-50, -50, self.frame.size.width, self.frame.size.height), afterScreenUpdates: true)
     var screenShot  = UIGraphicsGetImageFromCurrentImageContext()
     UIGraphicsEndImageContext()
     self.vc.showTWShare("I scored \(score) in Beanystalk can you do better? Available in App Store..", shareImage: screenShot)  
}

Taking screenshot from part of screen in swift

3 Answers3