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 UIKitclass 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 UIKitclass 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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