ios - 如何为 ios 拍摄 AGSMapView 的快照？

Question

      UIGraphicsBeginImageContextWithOptions(self.AgsMapView.bounds.size,false, 0.0)
        self.view.layer.renderInContext(UIGraphicsGetCurrentContext()!)
        snapShot = UIGraphicsGetImageFromCurrentImageContext()

他是我的代码，从上面的代码得到空白图像(白色)

Answer 1

试试这个代码!!

    let layer = self.AgsMapView.layer
    let scale = UIScreen.mainScreen().scale
    UIGraphicsBeginImageContextWithOptions(self.AgsMapView.frame.size, false, scale);
    layer.renderInContext(UIGraphicsGetCurrentContext()!)
    let snapShot = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()
    UIImageWriteToSavedPhotosAlbum(screenshot, nil, nil, nil)