UITextField是用来文本输入的,比如常用的登录用户名和密码输入等等,那我们直接进入主题吧

1.创建普通的UITextField

//构建基本的UITextField
var uitf:UITextField = UITextField(frame: CGRect(x: 50, y: 50, width: 200, height: 30))
uitf.backgroundColor = UIColor.whiteColor()
uitf.placeholder = "普通UITextField"

2.构建密码输入框

var uitf1:UITextField = UITextField(frame: CGRect(x: 50, y: 90, width: 200, height: 35))
uitf1.placeholder = "密码输入框"
uitf1.borderStyle = UITextBorderStyle.RoundedRect //边框样式
uitf1.backgroundColor = UIColor.whiteColor()
uitf1.secureTextEntry = true //密码输入框

3.设置UITextField的左边视图

var uitf2:UITextField = UITextField(frame: CGRect(x: 50, y: 135, width: 200, height: 30))
uitf2.placeholder = "请输入购买的物品"
uitf2.backgroundColor = UIColor.whiteColor()
var img:UIImageView = UIImageView(p_w_picpath: UIImage(named: "buy.png")!)
img.frame = CGRect(x: 5, y: 5, width: 40, height: 30)
img.contentMode = UIViewContentMode.ScaleAspectFit
uitf2.leftView = img
uitf2.leftViewMode = UITextFieldViewMode.Always
uitf2.leftViewRectForBounds(CGRect(x: 0, y: 0, width: 44, height: 44))

4.设置UITextField的右边边视图

 var uitf3:UITextField = UITextField(frame: CGRect(x: 50, y: 175, width: 200, height: 35))uitf3.placeholder = "请输入购买的物品"uitf3.backgroundColor = UIColor.whiteColor()uitf3.layer.cornerRadius = 2uitf3.layer.borderWidth = 1uitf3.layer.borderColor = UIColor.greenColor().CGColor//uitf3.borderStyle = UITextBorderStyle.RoundedRectvar img1:UIImageView = UIImageView(p_w_picpath: UIImage(named: "buy.png")!)img1.frame = CGRect(x: 5, y: 5, width: 40, height: 30)img1.contentMode = UIViewContentMode.ScaleAspectFituitf3.rightView = img1uitf3.rightViewMode = UITextFieldViewMode.Always

5.委托事件,及加入clear按钮

var uitf4:UITextField = UITextField(frame: CGRect(x: 50, y: 220, width: 200, height: 35))
uitf4.backgroundColor = UIColor.whiteColor()
uitf4.delegate = self
uitf4.clearButtonMode = UITextFieldViewMode.WhileEditing

当鼠标进入UITextField时,响应textFieldShouldBeginEditing -> textFieldDidBeginEditing
当鼠标退出UITextField时,响应textFieldShouldEndEditing -> textFieldDidEndEditing
当输入文本内容时,响应textField
在输入框里,在虚拟键盘上点击return时,响应textFieldShouldReturn
在输入框里,点击UITextField的clear按钮,响应textFieldShouldClear

    func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {NSLog("textField")return true}func textFieldShouldBeginEditing(textField: UITextField) -> Bool {NSLog("textFieldShouldBeginEditing")return true}func textFieldDidBeginEditing(textField: UITextField) {NSLog("textFieldDidBeginEditing")}func textFieldShouldEndEditing(textField: UITextField) -> Bool {NSLog("textFieldShouldEndEditing")return true}func textFieldDidEndEditing(textField: UITextField) {NSLog("textFieldDidEndEditing")}func textFieldShouldClear(textField: UITextField) -> Bool {NSLog("textFieldShouldClear")return true}func textFieldShouldReturn(textField: UITextField) -> Bool {NSLog("textFieldShouldReturn")textField.resignFirstResponder() //这个隐藏(放弃)虚拟键盘return true}

全部代码

import UIKitclass ViewController: UIViewController,UITextFieldDelegate {override func didReceiveMemoryWarning() {super.didReceiveMemoryWarning()// Dispose of any resources that can be recreated.}override func viewDidLoad() {super.viewDidLoad()// Do any additional setup after loading the view, typically from a nib.//构建基本的UITextFieldvar uitf:UITextField = UITextField(frame: CGRect(x: 50, y: 50, width: 200, height: 30))uitf.backgroundColor = UIColor.whiteColor()uitf.placeholder = "普通UITextField"self.view.addSubview(uitf)//构建密码输入框var uitf1:UITextField = UITextField(frame: CGRect(x: 50, y: 90, width: 200, height: 35))uitf1.placeholder = "密码输入框"uitf1.borderStyle = UITextBorderStyle.RoundedRect //边框样式uitf1.backgroundColor = UIColor.whiteColor()uitf1.secureTextEntry = true //密码输入框self.view.addSubview(uitf1)//设置UITextField的左边视图var uitf2:UITextField = UITextField(frame: CGRect(x: 50, y: 135, width: 200, height: 30))uitf2.placeholder = "请输入购买的物品"uitf2.backgroundColor = UIColor.whiteColor()var img:UIImageView = UIImageView(p_w_picpath: UIImage(named: "buy.png")!)img.frame = CGRect(x: 5, y: 5, width: 40, height: 30)img.contentMode = UIViewContentMode.ScaleAspectFituitf2.leftView = imguitf2.leftViewMode = UITextFieldViewMode.Alwaysuitf2.leftViewRectForBounds(CGRect(x: 0, y: 0, width: 44, height: 44))self.view.addSubview(uitf2)//设置UITextField的右边边视图var uitf3:UITextField = UITextField(frame: CGRect(x: 50, y: 175, width: 200, height: 35))uitf3.placeholder = "请输入购买的物品"uitf3.backgroundColor = UIColor.whiteColor()uitf3.layer.cornerRadius = 2uitf3.layer.borderWidth = 1uitf3.layer.borderColor = UIColor.greenColor().CGColor//uitf3.borderStyle = UITextBorderStyle.RoundedRectvar img1:UIImageView = UIImageView(p_w_picpath: UIImage(named: "buy.png")!)img1.frame = CGRect(x: 5, y: 5, width: 40, height: 30)img1.contentMode = UIViewContentMode.ScaleAspectFituitf3.rightView = img1uitf3.rightViewMode = UITextFieldViewMode.Alwaysself.view.addSubview(uitf3)//委托事件var uitf4:UITextField = UITextField(frame: CGRect(x: 50, y: 220, width: 200, height: 35))uitf4.backgroundColor = UIColor.whiteColor()uitf4.delegate = selfuitf4.clearButtonMode = UITextFieldViewMode.WhileEditingself.view.addSubview(uitf4)}// 当鼠标进入UITextField时,响应textFieldShouldBeginEditing -> textFieldDidBeginEditing// 当鼠标退出UITextField时,响应textFieldShouldEndEditing -> textFieldDidEndEditing// 当输入文本内容时,响应textField// 在输入框里,在虚拟键盘上点击return时,响应textFieldShouldReturn// 在输入框里,点击UITextField的clear按钮,响应textFieldShouldClearfunc textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {NSLog("textField")return true}func textFieldShouldBeginEditing(textField: UITextField) -> Bool {NSLog("textFieldShouldBeginEditing")return true}func textFieldDidBeginEditing(textField: UITextField) {NSLog("textFieldDidBeginEditing")}func textFieldShouldEndEditing(textField: UITextField) -> Bool {NSLog("textFieldShouldEndEditing")return true}func textFieldDidEndEditing(textField: UITextField) {NSLog("textFieldDidEndEditing")}func textFieldShouldClear(textField: UITextField) -> Bool {NSLog("textFieldShouldClear")return true}func textFieldShouldReturn(textField: UITextField) -> Bool {NSLog("textFieldShouldReturn")textField.resignFirstResponder() //这个隐藏(放弃)虚拟键盘return true}}

效果图

转载自吴统威的博客:http://www.wutongwei.com/front/infor_showone.tweb?id=98