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标题: ios - 截图方法 : Skipping the Status Bar [打印本页]

作者: 菜鸟教程小白    时间: 2022-12-12 22:16
标题: ios - 截图方法 : Skipping the Status Bar

我从苹果官网得到了这个截图方法:

- (UIImage*)screenshot 
{
    // Create a graphics context with the target size
    // On iOS 4 and later, use UIGraphicsBeginImageContextWithOptions to take the scale into consideration
    // On iOS prior to 4, fall back to use UIGraphicsBeginImageContext
    CGSize imageSize = [[UIScreen mainScreen] bounds].size;
    if (NULL != UIGraphicsBeginImageContextWithOptions)
        UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0);
    else
        UIGraphicsBeginImageContext(imageSize);

    CGContextRef context = UIGraphicsGetCurrentContext();

    // Iterate over every window from back to front
    for (UIWindow *window in [[UIApplication sharedApplication] windows]) 
    {
        if (![window respondsToSelectorselector(screen)] || [window screen] == [UIScreen mainScreen])
        {
            // -renderInContext: renders in the coordinate space of the layer,
            // so we must first apply the layer's geometry to the graphics context
            CGContextSaveGState(context);
            // Center the context around the window's anchor point
            CGContextTranslateCTM(context, [window center].x, [window center].y);
            // Apply the window's transform about the anchor point
            CGContextConcatCTM(context, [window transform]);
            // Offset by the portion of the bounds left of and above the anchor point
            CGContextTranslateCTM(context,
                                  -[window bounds].size.width * [[window layer] anchorPoint].x,
                                  -[window bounds].size.height * [[window layer] anchorPoint].y);

            // Render the layer hierarchy to the current context
            [[window layer] renderInContext:context];

            // Restore the context
            CGContextRestoreGState(context);
        }
    }

    // Retrieve the screenshot image
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return image;
}

它就像一个魅力,但我有一个小问题:我不希望状态栏在我的屏幕截图中显示应用程序。我应该修改什么?老实说,我不知道我应该在这里修改什么,因为我从来没有过多地使用 CG 框架。我正在考虑从获得“y”属性的东西中减去 20(状态栏高度),但我不想破坏这种方法。那么我应该修改什么来截取除状态栏以外的所有内容?再次,如果这是一个真正愚蠢的问题,我深表歉意,但我真的不知道我会做什么,我应该自己尝试修改它。



Best Answer-推荐答案


我刚刚想通了。事实上,我只是从“y”属性中减去了 20:

所以不要这样:

CGContextTranslateCTM(context, [window center].x, [window center].y);

我这样做了:

CGContextTranslateCTM(context, [window center].x, [window center].y - 20);

可能有更好的方法,但这个方法对我很有帮助。

关于ios - 截图方法 : Skipping the Status Bar,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/11787603/






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