Swift自定义控件--输入框

在开发安卓项目的时候经常对于常用的功能进行封装成控件来使用，一个是减少代码量，另一个看起来简洁，而对于苹果开发也喜欢封装成控件，然后再storyboard里面拖拽，对于IOS开发自己属于菜鸟级别所以代码质量不是很高，如果那里有问题，请指出，这里记录一个是备忘另一个希望多多交流。

这篇是自定义输入框，输入框在项目中经常用到，最常见的比如左边是label右边是textfield，效果图如下：

代码如下

//
//  TextFieldValidator.swift
//  CustomWidget
//
//  Created by System Administrator on 15/3/21.
//  Copyright (c) 2015年 jwzhangjie. All rights reserved.
//

import UIKit

class TextFieldValidator : UIView{

    var txtFlag:UILabel!
    var txtFieldFlag:UITextField!
    var spacing:CGFloat?
    var delegate:UITextFieldDelegate?

    required init(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        txtFlag = UILabel()
        txtFieldFlag = UITextField()
    }

    func initWithFrame(labelText:NSString, text:NSString, placeholder:NSString, spacing:CGFloat){
        var width:CGFloat = frame.size.width;
        var height:CGFloat = frame.size.height;
        txtFlag = UILabel(frame: CGRectMake(0, 0, width / 3, height))
        txtFlag.backgroundColor = UIColor.clearColor()
        txtFlag.textAlignment = NSTextAlignment.Left
        self.spacing = spacing
        self.addSubview(txtFlag)

        txtFieldFlag = UITextField(frame: CGRectMake(width / 3 + spacing, 0, width-width/3 + spacing, height))
        txtFieldFlag.borderStyle = UITextBorderStyle.RoundedRect
        txtFieldFlag.clearButtonMode = UITextFieldViewMode.Always
        self.addSubview(txtFieldFlag)

        setText(text)
        setLabelText(labelText)
        txtFieldFlag.placeholder = placeholder
    }

    func initWithFrame(labelText:NSString, placeholder:NSString, spacing:CGFloat){
        return initWithFrame(labelText, text: "", placeholder: placeholder, spacing: spacing)
    }

    func initWithFrame(labelText:NSString, placeholder:NSString){
        return initWithFrame(labelText, text: "", placeholder: placeholder, spacing: 0)
    }

    func setDelegate(delegate:UITextFieldDelegate){
        self.delegate = delegate
        txtFieldFlag.delegate = delegate
    }

    func setLeftTextFlag(text:NSString){
        txtFlag.text = text
    }

    func setLabelText(text:NSString){
        txtFlag.text = text
    }

    func setText(text:NSString){
        txtFieldFlag.text = text
    }

    func getText()->NSString{
        return txtFieldFlag.text;
    }

    func setTxtFlagAlignment(option:NSTextAlignment){
        txtFlag.textAlignment = option
    }

    func setSpacing(spacing:CGFloat){
        self.spacing = spacing;
        txtFieldFlag.frame=CGRectMake(txtFlag.frame.size.width+spacing, 0, self.frame.size.width-txtFlag.frame.size.width-spacing, self.frame.size.height);
    }

    func setSecureTextEntry(option:Bool){
        txtFieldFlag.secureTextEntry = option
    }

    func setClearButtonMode(mode:UITextFieldViewMode){
        txtFieldFlag.clearButtonMode = mode
    }

    func setReturnKey(type:UIReturnKeyType){
        txtFieldFlag.returnKeyType = type
    }
}

//
//  ViewController.swift
//  CustomWidget
//
//  Created by System Administrator on 15/3/21.
//  Copyright (c) 2015年 jwzhangjie. All rights reserved.
//

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var userName: TextFieldValidator!

    @IBOutlet weak var userPasswd: TextFieldValidator!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        userName.initWithFrame("用户名", placeholder: "请输入用户名")
        userName.setReturnKey(UIReturnKeyType.Next)
        userPasswd.initWithFrame("密码", placeholder: "请输入用户密码")
        userPasswd.setSecureTextEntry(true)
        userPasswd.setReturnKey(UIReturnKeyType.Done)

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

}

注意点：

如何将自定义控件加入storyboard?

由于自定义控件不是系统控件，所以能直接在Xcode中拖拽，首先需要拖拽自定义的父类，比如这里继承的是UIView，所以从Xcode中拖拽一个UIView到storyboard中，然后将UIView的class设置为自定义控件名称

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