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。
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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