我从Apple的网站上获得了这个截图方法:
- (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 respondsToSelector:@selector(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过CG框架。我正在考虑将20(状态栏高度)从一个得到一个" y"财产,但我不想打破这种方法。那么除了状态栏之外,我应该修改什么来截取所有内容?我再次道歉,如果这是一个真正的愚蠢问题,但我真的不知道我会做什么,我会尝试自己修改它。
答案 0 :(得分:4)
我只是想通了。实际上,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);
这可能是一种更好的方法,但这个方法很适合我。