animationUISearchBar框架的宽度

是否可以animationUISearchBar的框架宽度？ 我发现，当我应用uiviewanimation来扩大search栏的范围时，它会立即popup最终结果，就好像对象内部正在控制它的animation效果，而不是让我自己animation顺利地应用。

如果我animation的位置它移动平稳，但我怀疑文本input调整根据取消button的存在可能意味着我们没有公共访问animation宽度通过UIViewanimation。 下面的示例代码片段从x = 0滑动到100，但popup宽度为600像素宽。

CGRect searchBarFrame = self.searchViewController.searchBar.frame; searchBarFrame.origin.x = 100; searchBarFrame.size.width = 600; [UIView animateWithDuration:1.0 delay:0.0 options:0 animations:^{ self.searchViewController.searchBar.frame = searchBarFrame; } completion:^(BOOL completion){ }]; 

Answer 1

由于内部视图强制resize以忽略animation，所以UISearchBar有一个“问题”。 但是，这可以通过使用 – layoutSubviews来克服。 我在下面的项目中包含了扩展和合同代码

 [UIView animateWithDuration:.3 animations:^ { CGRect newBounds = locationSearch.frame; newBounds.size.width += 215; //newBounds.size.width -= 215; to contract locationSearch.frame = newBounds; [locationSearch layoutSubviews]; }]; 

希望这可以帮助。

Answer 2

仅供参考，您可以使用UIViewAnimationOption而不是显式调用layoutsubviews ，所以代码看起来像这样..

 [UIView animateWithDuration:0.5 delay:0 options:UIViewAnimationOptionLayoutSubviews animations:^{ //Set the frame you want to the search bar } completion:^(BOOL finished) { }]; 

Answer 3

这就是如何迅速克服左侧的扩大

（当用户开始/结束编辑时，这段代码会放大/缩小左边93像素的search栏）

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1. SharedNavigationbBar是实现UISearchBarDelegate的UIView
2. searchBarWidth是一个限制UISearchBar宽度的出口

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3. 故事板或nib文件中必须存在自动布局约束，以允许调整左侧的大小。 在这种情况下，最左边的组件是一个UIButton 。

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4. 添加下面的代码作为扩展或在您的类内执行animationresize。

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 extension SharedNavigationBar: UISearchBarDelegate { //amount of pixels to enlarge to the left private var offsetSearchBarLeft:CGFloat { get { return 93 } } ///Enlarges search bar func searchBarTextDidBeginEditing(searchBar: UISearchBar) { self.animateSearchBar(self.searchBar, enlarge: true) } ///Shrinks search bar func searchBarTextDidEndEditing(searchBar: UISearchBar) { self.animateSearchBar(self.searchBar, enlarge: false) } //shrinks or enlarge the searchbar (this will be the function to call inside the animation) private func animateSearchBar(searchBar:UISearchBar, enlarge:Bool) { ///Important here, for this to work, the option and the searchbar size must be handled this way UIView.animateWithDuration(0.3, delay: 0.0, options: UIViewAnimationOptions.LayoutSubviews, animations: { [weak self] () -> Void in let multiplier: CGFloat = enlarge ? 1 : -1 let origin = searchBar.frame.origin.x + self!.offsetSearchBarLeft * multiplier let width = searchBar.frame.width + self!.offsetSearchBarLeft * multiplier //This Block of code, setting the new frame, needs to be inside the animation in order to work var newBounds:CGRect = searchBar.frame; newBounds.origin.x = origin newBounds.size.width = width //Sets the new frame self?.searchBarWidth.constant = width searchBar.frame = newBounds }, completion: nil) } }