swift iOS中的屏幕截图？

本文介绍了swift iOS中的屏幕截图？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

有谁知道如何通过代码（在swift中）从我的屏幕截取屏幕截图并保存？ 我可以截取屏幕并将其另存为图像吗？

Does anyone know how can I take screenshot from my screen by code (in swift) and save it? Can I take screenshot and save it as image?

我看了，我看到了这段代码，但我不能用它（我想），因为它没有做任何事情......

I've looked and I see this code, but I can't use it (I Think) because it doesn't do anything..

var screen:UIScreen = UIScreen.mainScreen() snapshotVieww = screen.snapshotViewAfterScreenUpdates(false) UIGraphicsBeginImageContextWithOptions(screen.bounds.size, false, 0); snapshotVieww.drawViewHierarchyInRect(view.bounds, afterScreenUpdates: true) var image:UIImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); provino = UIImageView(image: image)

先谢谢！

推荐答案

使用Swift 4 / iOS 10.3，您可以选择以下方法之一来解决问题。

With Swift 4 / iOS 10.3, you can choose one of the following ways in order to solve your problem.

以下代码显示如何截取屏幕截图并将其保存在设备相册中：

The following code shows how to take a screenshot and save it in the device photo album:

import UIKit class ViewController: UIViewController { /* ... */ @IBAction func screenshot(_ sender: UIBarButtonItem) { //Create the UIImage UIGraphicsBeginImageContextWithOptions(view.frame.size, true, 0) guard let context = UIGraphicsGetCurrentContext() else { return } view.layer.render(in: context) guard let image = UIGraphicsGetImageFromCurrentImageContext() else { return } UIGraphicsEndImageContext() //Save it to the camera roll UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil) } }

请注意，此代码的结果将是.JPG图像。另请注意，导航栏和状态栏不会出现在最终图像中。

Note that the result of this code will be a .JPG image. Also note that the navigation bar and the status bar will not appear in the final image.

从iOS 10开始，作为前一代码的替代，您可以使用代码下面：

Since iOS 10, as an alternative to the previous code, you can use the code below:

import UIKit class ViewController: UIViewController { /* ... */ @IBAction func screenshot(_ sender: UIBarButtonItem) { //Create the UIImage let renderer = UIGraphicsImageRenderer(size: view.frame.size) let image = renderer.image(actions: { context in view.layer.render(in: context.cgContext) }) //Save it to the camera roll UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil) } }

2。截取iPhone窗口的屏幕截图

如果要拍摄包含导航栏（但不包括状态栏）的屏幕截图，可以使用以下代码：

2. Take a screenshot of an iPhone window

If you want to take a screenshot that includes the navigation bar (but not the status bar), you can use the following code:

import UIKit class ViewController: UIViewController { /* ... */ @IBAction func screenshot(_ sender: UIBarButtonItem) { //Create the UIImage guard let layer = UIApplication.shared.keyWindow?.layer else { return } UIGraphicsBeginImageContextWithOptions(layer.frame.size, true, 0) guard let context = UIGraphicsGetCurrentContext() else { return } layer.render(in: context) guard let image = UIGraphicsGetImageFromCurrentImageContext() else { return } UIGraphicsEndImageContext() //Save it to the camera roll UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil) } }

自iOS 10起，作为前一代码的替代，您可以使用以下代码：

Since iOS 10, as an alternative to the previous code, you can use the code below:

import UIKit class ViewController: UIViewController { /* ... */ @IBAction func screenshot(_ sender: UIBarButtonItem) { //Create the UIImage guard let layer = UIApplication.shared.keyWindow?.layer else { return } let renderer = UIGraphicsImageRenderer(size: layer.frame.size) let image = renderer.image(actions: { context in layer.render(in: context.cgContext) }) //Save it to the camera roll UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil) } }

提醒

自iOS 10起，为了防止您的应用在调用屏幕截图（_ :)时崩溃方法，你需要将密钥 NSPhotoLibraryUsageDescription 添加到你的项目中nfo.plist文件：

Reminder

Since iOS 10, in order to prevent your app from crashing when calling your screenshot(_:) method, you need to add the key NSPhotoLibraryUsageDescription to your project's Info.plist file:

<key>NSPhotoLibraryUsageDescription</key> <string>Some description to explain why access is required</string>