取消按钮解雇的UISearchBar键盘

Question

我在下面几行代码后消失：

func searchBarTextDidBeginEditing(searchBar: UISearchBar) { 
    searchBar.showsCancelButton = true 
} 

func searchBarSearchButtonClicked(searchBar: UISearchBar) { 
    searchBar.resignFirstResponder() 
} 

当我点击搜索按钮，键盘被驳回，取消按钮消失。

解决方案是什么？

Answer 1

已解决！

我已经通过在UISearchBar旁边添加UIButton [cancelButton]解决了问题，并将宽度约束添加为@IBOutlet。现在，我不再显示searchBar的cancelButton，而是改变cancelButton的宽度来显示或隐藏如下：

func searchBarTextDidBeginEditing(searchBar: UISearchBar) { 
    UIView.animateWithDuration(0.25) { 
     self.widthConstraint.constant = 44.0 
     self.cancelButton.layoutIfNeeded() 
    } 
} 

@IBAction func cancelButtonTapped(sender: UIButton) { 
    UIView.animateWithDuration(0.25) { 
     self.widthConstraint.constant = 0.0 
     self.cancelButton.layoutIfNeeded() 
    } 
}