如何将 UIView 转换为图像 [英] How to convert a UIView to an image

问题描述

我想将 UIView 转换为图像并将其保存在我的应用程序中.有人可以告诉我如何截取视图的屏幕截图或将其转换为图像，以及将其保存在应用程序中的最佳方式是什么(不是相机胶卷)?这是视图的代码:

I want to convert a UIView to an image and save it in my app. Can someone please tell me how to take screenshot of a view or convert it to an image and what is the best way to save it in an app (Not camera roll)? Here is the code for the view:

var overView   = UIView(frame: CGRectMake(0, 0, self.view.frame.width/1.3, self.view.frame.height/1.3))
overView.center = CGPointMake(CGRectGetMidX(self.view.bounds),
CGRectGetMidY(self.view.bounds)-self.view.frame.height/16);
overView.backgroundColor = UIColor.whiteColor()
self.view.addSubview(overView)
self.view.bringSubviewToFront(overView)

推荐答案

例如，如果我有一个尺寸视图:50 50 at 100,100.我可以使用以下内容截取屏幕截图:

For example if I have a view of size: 50 50 at 100,100. I can use the following to take a screenshot:

    UIGraphicsBeginImageContextWithOptions(CGSizeMake(100, 100), false, 0);
    self.view.drawViewHierarchyInRect(CGRectMake(-50,-5-,view.bounds.size.width,view.bounds.size.height), afterScreenUpdates: true)
    var image:UIImage = UIGraphicsGetImageFromCurrentImageContext();

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