Swift - 生成各种控件的工厂类（包含标签，按钮，输入框等）

在iOS开发中，页面里有时会大量的用到一些控件，如果要一个个单独创建再设置样式的话就显得很麻烦。我们可以创建一个生成各种控件的工厂类，这样在需要的时候调用下就可以了。

下面以一个自定义的工厂类为例，其中提供了文本标签，按钮，文本输入框，分段单选控件的生成，效果图如下：
  
工厂类：ViewFactory.swift
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import UIKit
 
class ViewFactory
{
    /**
    * 控件默认尺寸
    */
    class func getDefaultFrame() -> CGRect
    {
        let defaultFrame = CGRectMake(0, 0, 100, 30)
        return defaultFrame
    }
     
    class func createControl(type:String, title:[String], action:Selector, sender:AnyObject) -> UIView
    {
        switch(type)
        {
            case "label":
                return ViewFactory.createLabel(title[0])
            case "button":
                return ViewFactory.createButton(title[0], action: action,
                    sender: sender as UIViewController)
            case "text":
                return ViewFactory.createTextField(title[0], action: action,
                    sender: sender as UITextFieldDelegate)
            case "segment":
                return ViewFactory.createSegment(title, action: action, sender:
                    sender as UIViewController)
            default:
                return ViewFactory.createLabel(title[0])
        }
    }
     
    /**
    * 创建按钮控件
    */
    class func createButton(title:String, action:Selector, sender:UIViewController)->UIButton
    {
        var button = UIButton(frame:ViewFactory.getDefaultFrame())
        button.backgroundColor = UIColor.orangeColor()
        button.setTitle(title, forState:.Normal)
        button.titleLabel!.textColor = UIColor.whiteColor()
        button.titleLabel!.font = UIFont.systemFontOfSize(14)
        button.addTarget(sender, action:action, forControlEvents:UIControlEvents.TouchUpInside)
        return button
    }
     
    /**
    * 创建文本输入框控件
    */
    class func createTextField(value:String, action:Selector, sender:UITextFieldDelegate)
        -> UITextField
    {
        var textField = UITextField(frame:ViewFactory.getDefaultFrame())
        textField.backgroundColor = UIColor.clearColor()
        textField.textColor = UIColor.blackColor()
        textField.text = value
        textField.borderStyle = UITextBorderStyle.RoundedRect
        textField.adjustsFontSizeToFitWidth = true
        textField.delegate = sender
        return textField
    }
     
    /**
    * 创建分段单选控件
    */
    class func createSegment(items: [String], action:Selector, sender:UIViewController)
        ->UISegmentedControl
    {
        var segment = UISegmentedControl(items:items)
        segment.frame = ViewFactory.getDefaultFrame()
        //segment.segmentedControlStyle = UISegmentedControlStyle.Bordered
        segment.momentary = false
        segment.addTarget(sender, action:action, forControlEvents:UIControlEvents.ValueChanged)
        return segment
    }
     
    /**
    * 创建文本标签控件
    */
    class func createLabel(title:String) -> UILabel
    {
        let label = UILabel()
        label.textColor = UIColor.blackColor();
        label.backgroundColor = UIColor.whiteColor();
        label.text = title;
        label.frame = ViewFactory.getDefaultFrame()
        label.font =  UIFont(name: "HelveticaNeue-Bold", size: 16)
        return label
    }
}


工厂类的使用：

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import UIKit
 
class ViewController: UIViewController,UITextFieldDelegate {
 
    var txtNum:UITextField!
    var segDimension:UISegmentedControl!
    var btn:UIButton!
     
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        setupControls()
    }
     
    func setupControls()
    {
        //创建文本标签
        let labelNum = ViewFactory.createLabel("阈值:")
        labelNum.frame = CGRect(x: 20, y: 100, width: 60, height: 30)
        self.view.addSubview(labelNum)
         
        let labelDm = ViewFactory.createLabel("维度:")
        labelDm.frame = CGRect(x: 20, y: 200, width: 60, height: 30)
        self.view.addSubview(labelDm)
         
        //创建文本输入框
        txtNum = ViewFactory.createTextField("", action:Selector("numChanged"), sender:self)
        txtNum.frame = CGRect(x:80,y:100,width:200,height:30)
        txtNum.returnKeyType = UIReturnKeyType.Done
        self.view.addSubview(txtNum)
         
        //创建分段单选控件
        segDimension = ViewFactory.createSegment(["3x3", "4x4", "5x5"], action:"dimensionChanged:",
            sender:self)
        segDimension.frame = CGRect(x:80,y: 200,width: 200,height: 30)
        self.view.addSubview(segDimension)
        segDimension.selectedSegmentIndex = 1
         
        //创建按钮控件
        btn = ViewFactory.createButton("确定", action: nil, sender: self)
        btn.frame.origin = CGPointMake(80, 300)
        self.view.addSubview(btn)
    }
 
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}
posted @ 2015-09-25 15:31  brave-sailor  阅读(314)  评论(0)  编辑  收藏  举报