我正在使用一种方法来获取UIImage截图以编程方式,这非常有效。我现在要做的是删除屏幕截图中包含的最顶级的UIView 但不要将其从屏幕上的实际视图中删除,因此只需设置topView.hidden = YES
即可。我正在使用此方法保存屏幕截图:
- (UIImage*)screenshot
{
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;
}
我的第一个想法是从超级层中删除子层:
NSArray *sublayers = [[window layer] sublayers];
[[window layer] replaceSublayer:[sublayers objectAtIndex:[sublayers count] - 1] with:nil];
但我发现sublayers
数组只有一个对象。如何从屏幕截图中删除顶视图?
答案 0 :(得分:0)
例如,您在视图层次结构中有View1,并且您不想截取View1的屏幕截图,那么您可以执行View1.hiden = TRUE;在截图之前你可以做View1.hiden = FALSE;截图后。
可能会对你有帮助。