Question

我希望每秒拍摄20张截图3秒，所有这些都会添加到转换为视频的UIImage数组中。

以下是用于截取屏幕截图的代码：

func screenshot() {
        var imageSize = CGSize.zero

        let orientation = UIApplication.shared.statusBarOrientation
        if UIInterfaceOrientationIsPortrait(orientation) {
            imageSize = UIScreen.main.nativeBounds.size
        } else {
            imageSize = CGSize(width: UIScreen.main.nativeBounds.size.height, height: UIScreen.main.nativeBounds.size.width)
        }

        UIGraphicsBeginImageContextWithOptions(imageSize, false, 0)
        for window in UIApplication.shared.windows {
            window.drawHierarchy(in: window.bounds, afterScreenUpdates: true)
        }

        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()

        images.append(image!)

    }

我已经阅读了以下question，虽然它已经很安静了，但我确信在20FPS下可以完成3秒钟，但我不确定哪个会是实现它的最佳方式。

编辑： 使用UIScreen.main.nativeBounds.size而不是UIScreen.main.bounds.size，否则您将收到“错误”字样。图像大小，它可以安静的痛苦。如果“显示缩放”设置为“缩放”而不是标准信用，则为真：@ Christopher Pickslay

Answer 1

这有效：

var limit = 80 

func capture() {

     if limit > 0 {

     delay(0.03) {

     self.screenshot()

     self.capture()

   } else {

convertToVideo()

}

 func screenshot()  {

        var imageSize = CGSize.zero

        let orientation = UIApplication.shared.statusBarOrientation
        if UIInterfaceOrientationIsPortrait(orientation) {
            imageSize = UIScreen.main.nativeBounds.size
        } else {
            imageSize = CGSize(width: UIScreen.main.nativeBounds.size.height, height: UIScreen.main.nativeBounds.size.width)
        }

        UIGraphicsBeginImageContextWithOptions(imageSize, false, 0)
        for window in UIApplication.shared.windows {
            window.drawHierarchy(in: window.bounds, afterScreenUpdates: true)
        }

        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()

        images.append(image!)

        limit = limit - 1

    }

延迟是：

func delay(_ delay:Double, closure:@escaping ()->()) {
    DispatchQueue.main.asyncAfter(
        deadline: DispatchTime.now() + Double(Int64(delay * Double(NSEC_PER_SEC))) / Double(NSEC_PER_SEC), execute: closure)
}

每秒拍摄20张截图Swift？

1 个答案: