ios - 从 UIScreen 获取快照

Question

我想从包括状态栏在内的 View 中截取快照。

下面的代码可以在模拟器中运行，但不能在物理设备上运行。

extension UIScreen {

    class func screenshot() -> UIImage {
        let view = main.snapshotView(afterScreenUpdates: false)

        UIGraphicsBeginImageContext(view.bounds.size)
        view.drawHierarchy(in: view, afterScreenUpdates: true)

        let screenshot = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return screenshot!
    }
}

Answer 1

要解决您的问题，您可以使用此功能:

func takeScreenshot() -> UIImage? {
    var screenshotImage :UIImage?
    let layer = UIApplication.shared.keyWindow!.layer
    let scale = UIScreen.main.scale
    UIGraphicsBeginImageContextWithOptions(layer.frame.size, false, scale);
    guard let context = UIGraphicsGetCurrentContext() else {return nil}
    layer.render(in:context)
    screenshotImage = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()

    return screenshotImage
}

我刚刚对此进行了测试，它可以在物理设备上运行。