importUIKit
class ViewController: UIViewController {
var searchBar: UISearchBar?
override func viewDidLoad() {
super.viewDidLoad()
self.setupSearchBar()
}
func setupSearchBar() {
self.searchBar=UISearchBar(frame:CGRect(x:20, y:64+10, width:UIScreen.main.bounds.width-2*20, height:50))
self.searchBar?.placeholder="热门话题"
/**
public enum UISearchBarStyle : UInt {
case`default`// currently UISearchBarStyleProminent 有背景 默认样式
case prominent // used my Mail, Messages and Contacts 有背景 突出样式
case minimal // used by Calendar, Notes and Music 无背景 最小样式
}
*/
//去除底部黑色边框
self.searchBar?.searchBarStyle = .minimal
/**
public enum UIBarStyle : Int {
case `default` 白色
case black 黑色
public static var blackOpaque: UIBarStyle { get } // Deprecated. Use UIBarStyleBlack 黑色
case blackTranslucent // Deprecated. Use UIBarStyleBlack and set the translucent property to YES 黑色
}
*/
// 设置样式
self.searchBar?.barStyle= .default
// 设置背景色
self.searchBar?.barTintColor=UIColor.red
// 点击return自动搜索
self.searchBar?.enablesReturnKeyAutomatically = true
/**
public enum UISearchBarIcon : Int {
case search // The magnifying glass
case clear // The circle with an x in it
case bookmark // The open book icon
case resultsList // The list lozenge icon
}
*/
// _的作用：忽略返回值，消除警告
_=self.searchBar?.image(for: .resultsList, state: .highlighted)
self.searchBar?.delegate=self
self.view.addSubview(self.searchBar!)
}
overridefunctouchesBegan(_touches:Set, with event:UIEvent?) {
self.searchBar?.resignFirstResponder()
}
}
// MARK: 搜索代理UISearchBarDelegate方法
extension ViewController: UISearchBarDelegate {
func searchBarShouldBeginEditing(_ searchBar: UISearchBar) -> Bool {
print("将要开始编辑")
return true
}
func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
print("已经开始编辑")
}
funcsearchBarShouldEndEditing(_searchBar:UISearchBar) ->Bool{
print("将要结束编辑")
return true
}
func searchBarTextDidEndEditing(_ searchBar: UISearchBar) {
print("已经结束编辑")
}
funcsearchBar(_searchBar:UISearchBar, shouldChangeTextIn range:NSRange, replacementText text:String) ->Bool{
print("文本改变的时候触发 text:\(text)")
return true
}
}
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