swift控件工厂类的实现代码

控件工厂类，简而言之就是，减少代码的复用率，只在哪里用，然后在哪里调：

代码如下：

import UIKit

class ViewFactory: UIView,UITextFieldDelegate {

  //默认控件的尺寸
  class func getDefaultFrame( ) -> CGRect
  {
    let defaultFrame = CGRect(x:0,y:0,width:100,height:30)
    return defaultFrame
  }

  //类方法
  class func createControl(type:String,title:[String],action:Selector,sender:AnyObject) -> UIView
  {
    switch type {
    case "label":
      return ViewFactory.creatLabel(title: title[0])
      case "button":
      return ViewFactory.createButton(title: title[0], action: action, sender: sender as! UIViewController)
      case "text":
      return ViewFactory.creatTextField(value: title[0], action: action, sender: sender as! UIViewController as UIViewController as! UITextFieldDelegate)
      case "segment":
      return ViewFactory.creatSegment(items: [title[0]], action: action, sender: sender as! UIViewController)
    default:
      return ViewFactory.creatLabel(title: title[0])
    }
  }

  //创建按钮控件
  class func createButton(title:String, action:Selector, sender:UIViewController)
    -> UIButton {
      let button = UIButton(frame:ViewFactory.getDefaultFrame())
      button.backgroundColor = UIColor.orange
      button.setTitle(title, for:.normal)
      button.titleLabel!.textColor = UIColor.white
      button.titleLabel!.font = UIFont.systemFont(ofSize: 14)
      button.addTarget(sender, action:action, for:.touchUpInside)
      return button
  }

  //创建文本输入框控件
  class func creatTextField(value:String,action:Selector,sender:UITextFieldDelegate) -> UITextField
  {
    let textField = UITextField(frame:ViewFactory.getDefaultFrame())
    textField.backgroundColor = UIColor.clear
    textField.textColor = UIColor.black
    textField.text = value
    textField.borderStyle = .roundedRect
    textField.adjustsFontSizeToFitWidth = true
    textField.delegate = sender
    return textField
  }

  //创建分段单选组件
  class func creatSegment(items:[String],action:Selector,sender:UIViewController) -> UISegmentedControl
  {
    let segment = UISegmentedControl(items:items)
    segment.frame = ViewFactory.getDefaultFrame()
    segment.isMomentary = false
    segment.addTarget(self, action: action, for: .valueChanged)
    return segment
  }

  //创建文本标签控件
  class func creatLabel(title:String) -> UILabel
  {
    let label = UILabel()
    label.textColor = UIColor.black
    label.backgroundColor = UIColor.white
    label.text = title
    label.frame = ViewFactory.getDefaultFrame()
    label.font = UIFont(name:"微软雅黑",size:16)
    return label

  }
}

调用：

 func initVIewFactory()
  {
    //创建文本标签
    let labelNum = ViewFactory.creatLabel(title: "阈值")
    labelNum.frame = CGRect(x:20,y:100,width:60,height:30)
    self.view.addSubview(labelNum)

    let labelDm = ViewFactory.creatLabel(title: "维度")
    labelDm.frame = CGRect(x:20,y:200,width:60,height:30)
    self.view.addSubview(labelDm)

    //创建文本输入框
    textNum = ViewFactory.creatTextField(value: "", action:#selector(factoryAction), sender: self as UITextFieldDelegate)
    textNum.frame = CGRect(x:80,y:100,width:200,height:30)
    textNum.returnKeyType = .done
    self.view.addSubview(textNum)

    let textNumSecond = ViewFactory.creatTextField(value: "", action: #selector(factoryActionSecond), sender: self as UITextFieldDelegate)
    textNumSecond.frame = CGRect(x:80,y:200,width:200,height:30)
    textNum.returnKeyType = .done
    self.view.addSubview(textNumSecond)

    //创建分段单选控件
    segmentC = ViewFactory.creatSegment(items: ["3*3","4*4","5*5"], action: #selector(segmentAction), sender: self)
    segmentC.frame = CGRect(x:80,y:200,width:200,height:30)
    self.view.addSubview(segmentC)
    segmentC.selectedSegmentIndex = 0

    //创建按钮控件
    factorybtn = ViewFactory.createButton(title: "确定", action: #selector(factoryClick), sender: self)
    factorybtn.frame.origin = CGPoint(x:80,y:300)
    self.view.addSubview(factorybtn)

  }

  func factoryAction()
  {

  }

  func factoryActionSecond()
  {

  }

  func segmentAction()
  {

  }

  func factoryClick()
  {
    print("我点击了")
  }

效果如下：

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