ios - 将 UIimageView 的数量合并为一个

Question

我有几个 UIImageViews 在 eace 之上，假设我想将它们全部保存为一个图像。有没有办法“截屏”/将所有 UIImageView 连接到一个？

那么我可以使用:

UIGraphicsBeginImageContext(mv.frame.size);
[[mv layer] renderInContext:UIGraphicsGetCurrentContext()];
UIImage *screenshot = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

谢谢。

Answer 1

您可以通过截屏所有 UIImageView 的 super View 来实现。我为此编写了一个方法:(确保您将 UIImageViews 添加到同一 View 。例如:

[self.view addSubview: image1];
[self.view addSubview: image2];
[self.view addSubview: image3];
[self.view addSubview: image4];

然后制作关于self.view的截图)

+ (UIImage*) screenShotTheArea:(CGRect)area inView:(UIView*)view{

        if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)])
            UIGraphicsBeginImageContextWithOptions(CGSizeMake(area.size.width, area.size.height), NO, [UIScreen mainScreen].scale);
        else
            UIGraphicsBeginImageContext(view.bounds.size);

        CGContextRef c = UIGraphicsGetCurrentContext();
        CGContextTranslateCTM(c, -area.origin.x, -area.origin.y);
        [view.layer renderInContext:c];
        UIImage* thePrintScreen = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();

        return thePrintScreen;
    }