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效果

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源碼

// // UIView+ScreensShot.swift // Swift-Animations // // Created by YouXianMing on 16/9/5. // Copyright ? 2016年 YouXianMing. All rights reserved. // import UIKitextension UIView {/**Get the view's screen shot, this function may be called from any thread of your app.- returns: The screen shot's image.*/func screenShot() -> UIImage? {guard frame.size.height > 0 && frame.size.width > 0 else {return nil}UIGraphicsBeginImageContextWithOptions(frame.size, false, 0)layer.renderInContext(UIGraphicsGetCurrentContext()!)let image = UIGraphicsGetImageFromCurrentImageContext()UIGraphicsEndImageContext()return image} }

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使用

// // ViewController.swift // ScreenShot // // Created by YouXianMing on 16/9/5. // Copyright ? 2016年 YouXianMing. All rights reserved. // import UIKitclass ViewController: UIViewController {override func viewDidLoad() {super.viewDidLoad()let redView = UIView(frame: CGRectMake(40, 40, 200, 200))redView.backgroundColor = UIColor.redColor().colorWithAlphaComponent(0.5)view.addSubview(redView)let imageView = UIImageView(image: redView.screenShot())view.addSubview(imageView)} }

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轉(zhuǎn)載于:https://www.cnblogs.com/YouXianMing/p/5843924.html

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