我正在开发一个应用程序,需要隐藏UINavigationBar(和工具栏)以在应用内浏览器中提供全屏模式。
当应用程序运行此代码时,动画工作正常。
[self.navigationController setNavigationBarHidden:YES animated:YES];
[self.navigationController setToolbarHidden:YES animated:YES];
当我想退出全屏模式时,动画根本不光滑。
[self.navigationController setNavigationBarHidden:NO animated:YES];
[self.navigationController setToolbarHidden:NO animated:YES];
在动画期间,导航栏下方会显示一个黑色矩形,我认为是自动调整大小的UIWebView(工具栏动画工作正常。)
关于如何解决这个问题的任何想法?
答案 0 :(得分:1)
不要使用setNavigationBarHidden:animated:
隐藏导航栏,请尝试以下操作:
在视图控制器的viewDidLoad
中为您的导航栏和视图计算不同的帧:
// The normal navigation bar frame, i.e. fully visible
normalNavBarFrame = self.navigationController.navigationBar.frame;
// The frame of the hidden navigation bar (moved up by its height)
hiddenNavBarFrame = normalNavBarFrame;
hiddenNavBarFrame.origin.y -= CGRectGetHeight(normalNavBarFrame);
// The frame of your view as specified in the nib file
normalViewFrame = self.view.frame;
// The frame of your view moved up by the height of the navigation bar
// and increased in height by the same amount
fullViewFrame = normalViewFrame;
fullViewFrame.origin.y -= CGRectGetHeight(normalNavBarFrame);
fullViewFrame.size.height += CGRectGetHeight(normalNavBarFrame);
当你想要全屏时:
[UIView animateWithDuration:0.3
animations:^{
self.navigationController.navigationBar.frame = hiddenNavBarFrame;
self.view.frame = fullViewFrame;
} completion:^(BOOL finished) {
}];
当你想恢复正常时:
[UIView animateWithDuration:0.3
animations:^{
self.navigationController.navigationBar.frame = normalNavBarFrame;
self.view.frame = normalViewFrame;
} completion:^(BOOL finished) {
}];
在iOS 5.1模拟器中测试过。希望你能用它。 “黑色矩形”必须是窗口的默认背景颜色,即导航栏和视图之间的间隙。