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  • 实现程序内截屏功能的代码

    [支持 iPhone 4 Retina 高分屏]

    UIView *view = [[[[[UIApplication sharedApplication] windows] objectAtIndex:1] subviews] lastObject];//获得某个window的某个subView
     
        NSInteger index = 0;//用来给保存的png命名
        for (UIView *subView in [view subviews]) {//遍历这个view的subViews
            if ([subView isKindOfClass:NSClassFromString(@"UIImageView")] || [subView isKindOfClass:NSClassFromString(@"UIThreePartButton")]) {//找到自己需要的subView
                //支持retina高分的关键
                if(UIGraphicsBeginImageContextWithOptions != NULL)
                {
                    UIGraphicsBeginImageContextWithOptions(subView.frame.size, NO, 0.0);
                } else {
                    UIGraphicsBeginImageContext(subView.frame.size);
                }            
     
                //获取图像
                [subView.layer renderInContext:UIGraphicsGetCurrentContext()];
                UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
                UIGraphicsEndImageContext();
     
                //保存图像
                NSString *path = [NSHomeDirectory() stringByAppendingFormat:@"/%d.png",index];
                if ([UIImagePNGRepresentation(image) writeToFile:path atomically:YES]) {
                    index += 1;
                    NSLog(@"Succeeded!");
                }
                else {
                    NSLog(@"Failed!");
                }
            }
        }

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  • 原文地址:https://www.cnblogs.com/zhulin/p/1993427.html
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