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.
}
} |