IOS改变UISearchBar中搜索框的高度

class IDSearchBar: UISearchBar {}

var contentInset: UIEdgeInsets? {  didSet {    self.layoutSubviews()  }}

override func layoutSubviews() {  super.layoutSubviews()  // view是searchBar中的唯一的直接子控件  for view in self.subviews {    // UISearchBarBackground与UISearchBarTextField是searchBar的简介子控件    for subview in view.subviews {      // 找到UISearchBarTextField      if subview.isKindOfClass(UITextField.classForCoder()) {        if let textFieldContentInset = contentInset { // 若contentInset被赋值          // 根据contentInset改变UISearchBarTextField的布局          subview.frame = CGRect(x: textFieldContentInset.left, y: textFieldContentInset.top, width: self.bounds.width - textFieldContentInset.left - textFieldContentInset.right, height: self.bounds.height - textFieldContentInset.top - textFieldContentInset.bottom)        } else { // 若contentSet未被赋值          // 设置UISearchBar中UISearchBarTextField的默认边距          let top: CGFloat = (self.bounds.height - 28.0) / 2.0          let bottom: CGFloat = top          let left: CGFloat = 8.0          let right: CGFloat = left          contentInset = UIEdgeInsets(top: top, left: left, bottom: bottom, right: right)        }      }    }  }}

searchBar.frame = CGRect(x: 80, y: 100, width: 200, height: 40)

searchBar.frame = CGRect(x: 80, y: 100, width: 200, height: 40)

// 设置contentInsetsearchBar.contentInset = UIEdgeInsets(top: 0, left: 8, bottom: 0, right: 8)