添加多个UIButton的多个UIView的斯威夫特
我写了下面的代码编程创建多个UIButton
被放置在不同的UIView
。按钮标题的所有按钮都相似且不同。代码没有完成它所需要做的,但你可以看到,代码是相当冗长,它太冗长。添加多个UIButton的多个UIView的斯威夫特
问题
我怎样组织下面的代码,使之紧凑,简洁的?
代码
let myButton0 = UIButton(type: UIButtonType.Custom)
myButton0.setTitle("Text 0", forState:.Normal)
myButton0.titleLabel!.font = UIFont.systemFontOfSize(12)
myButton0.setTitleColor(UIColor.whiteColor(), forState: .Normal)
myButton0.backgroundColor = UIColor.darkGrayColor()
myButton0.frame = CGRectMake(0, 0, 200, 100)
myButton0.alpha = 1
myButton0.showsTouchWhenHighlighted = false
myButton0.adjustsImageWhenHighlighted = false
myButton0.addTarget(self, action: #selector(ViewController.goDoThis0), forControlEvents:.TouchUpInside)
myView0.addSubview(myButton0)
let myButton1 = UIButton(type: UIButtonType.Custom)
myButton1.setTitle("Text 1", forState:.Normal)
myButton1.titleLabel!.font = UIFont.systemFontOfSize(12)
myButton1.setTitleColor(UIColor.whiteColor(), forState: .Normal)
myButton1.backgroundColor = UIColor.darkGrayColor()
myButton1.frame = CGRectMake(0, 0, 200, 100)
myButton1.alpha = 1
myButton1.showsTouchWhenHighlighted = false
myButton1.adjustsImageWhenHighlighted = false
myButton1.addTarget(self, action: #selector(ViewController.goDoThis1), forControlEvents:.TouchUpInside)
myView1.addSubview(myButton1)
let myButton2 = UIButton(type: UIButtonType.Custom)
myButton2.setTitle("Text 2", forState:.Normal)
myButton2.titleLabel!.font = UIFont.systemFontOfSize(12)
myButton2.setTitleColor(UIColor.whiteColor(), forState: .Normal)
myButton2.backgroundColor = UIColor.darkGrayColor()
myButton2.frame = CGRectMake(0, 0, 200, 100)
myButton2.alpha = 1
myButton2.showsTouchWhenHighlighted = false
myButton2.adjustsImageWhenHighlighted = false
myButton2.addTarget(self, action: #selector(ViewController.goDoThis2), forControlEvents:.TouchUpInside)
myView2.addSubview(myButton2)
let myButton3 = UIButton(type: UIButtonType.Custom)
myButton3.setTitle("Text 3", forState:.Normal)
myButton3.titleLabel!.font = UIFont.systemFontOfSize(12)
myButton3.setTitleColor(UIColor.whiteColor(), forState: .Normal)
myButton3.backgroundColor = UIColor.darkGrayColor()
myButton3.frame = CGRectMake(0, 0, 200, 100)
myButton3.alpha = 1
myButton3.showsTouchWhenHighlighted = false
myButton3.adjustsImageWhenHighlighted = false
myButton3.addTarget(self, action: #selector(ViewController.goDoThis3), forControlEvents:.TouchUpInside)
myView3.addSubview(myButton3)
let myButton4 = UIButton(type: UIButtonType.Custom)
myButton4.setTitle("Text 4", forState:.Normal)
myButton4.titleLabel!.font = UIFont.systemFontOfSize(12)
myButton4.setTitleColor(UIColor.whiteColor(), forState: .Normal)
myButton4.backgroundColor = UIColor.darkGrayColor()
myButton4.frame = CGRectMake(0, 0, 200, 100)
myButton4.alpha = 1
myButton4.showsTouchWhenHighlighted = false
myButton4.adjustsImageWhenHighlighted = false
myButton4.addTarget(self, action: #selector(ViewController.goDoThis4), forControlEvents:.TouchUpInside)
myView4.addSubview(myButton4)
(SWIFT 4.0)
首先,写用于创建按钮的常用方法:
func createButton(title:String,toView:UIView,action:Selector) {
let myButton = UIButton(type: UIButtonType.custom)
myButton.setTitle(title, for:.normal)
myButton.titleLabel?.font = UIFont.systemFont(ofSize: 12)
myButton.setTitleColor(UIColor.white, for: .normal)
myButton.backgroundColor = UIColor.darkGray
myButton.frame = CGRect(x: 0, y: 0, width: 200, height: 100)
myButton.alpha = 1
myButton.showsTouchWhenHighlighted = false
myButton.adjustsImageWhenHighlighted = false
myButton.addTarget(self, action: action, for: .touchUpInside)
toView.addSubview(myButton)
}
然后创建这样的按钮:
let buttonInfos = [
["Text 0",myView0,#selector(ViewController.goDoThis0)],
["Text 1",myView1,#selector(ViewController.goDoThis1)],
["Text 2",myView2,#selector(ViewController.goDoThis2)],
["Text 3",myView3,#selector(ViewController.goDoThis3)],
["Text 4",myView4,#selector(ViewController.goDoThis4)],
]
for buttonInfo in buttonInfos {
self.createButton(title: buttonInfo[0] as! String, toView: buttonInfo[1] as! UIView, action: buttonInfo[2] as! Selector)
}
完美。解释和代码向我展示了一种新技术。非常感谢! – user4806509
:),欢迎您! –
虽然这个问题已经回答了,但我想提供另一种方法,改编自Yun CHEN's answer。
同样,对于您的按钮创建一个通用的方法:
func createButton(title:String,toView:UIView,action:Selector) {
let myButton = UIButton(type: UIButtonType.custom)
myButton.setTitle(title, for:.normal)
myButton.titleLabel?.font = UIFont.systemFont(ofSize: 12)
myButton.setTitleColor(UIColor.white, for: .normal)
myButton.backgroundColor = UIColor.darkGray
myButton.frame = CGRect(x: 0, y: 0, width: 200, height: 100)
myButton.alpha = 1
myButton.showsTouchWhenHighlighted = false
myButton.adjustsImageWhenHighlighted = false
myButton.addTarget(self, action: action, for: .touchUpInside)
toView.addSubview(myButton)
}
然后在元组数组列出按钮信息:
let buttonInfos = [
("Text 0",myView0,#selector(ViewController.goDoThis0)),
("Text 1",myView1,#selector(ViewController.goDoThis1)),
("Text 2",myView2,#selector(ViewController.goDoThis2)),
("Text 3",myView3,#selector(ViewController.goDoThis3)),
("Text 4",myView4,#selector(ViewController.goDoThis4)),
]
最后创建像这样的按钮:
for buttonInfo in buttonInfos {
self.createButton(title: buttonInfo.0, toView: buttonInfo.1, action: buttonInfo.2)
}
正如你在你的案例中看到的那样,通过使用元组,你不需要将类型转换为as! String
,as! UIView
等,简化并使得代码更短,更安全。
感谢这个替代品! – user4806509
不客气! :) – LWJ
这个问题可能最适合在核心评论论坛 - https://codereview.stackexchange.com - 但我的头顶,为什么不扩展'UIButton',创建一个'方便'初始值设定项,它包装每个按钮的代码成一个单一的电话?您甚至可以将'addTarget'参数传递给初始值设定项。 (我做这一切的时候。) – dfd
子类UIButton的 –