Question

我有一些UIImageViews在eace之上，让我们说我想要保存所有这些单个图像。有没有办法将所有UIImageView“截屏”/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

您可以通过制作有关所有UIImageView的超级视图的屏幕截图来完成此操作。我为此写了一个方法:(确保将UIImageViews添加到同一视图中。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的屏幕截图）

+ (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;
    }

Answer 2

如果您想要快速简便的方法，请截取包含图像的视图

- (UIImage *)screenShot:(UIView *)aView {
UIGraphicsBeginImageContext(self.view.frame.size);
[aView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
CGContextSetRGBFillColor (UIGraphicsGetCurrentContext(), 0, 0, 0, 0.4f);
CGContextFillRect (UIGraphicsGetCurrentContext(), self.view.frame);
UIGraphicsEndImageContext();

return image; }

并获得：

UIImage *screenshot = [self screenShot:self.view];

祝你好运!!

将UIimageView的数量统一到一个

2 个答案: