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Swift-代理
委托是一种设计模式,它允许类或结构体将一些需要它们负责的功能交由给其他的类型
委托模式的实现很简单: 定义协议来封装那些需要被委托的函数和方法,使其遵循着拥有这些被委托的函数和方法
//制定需要遵守的协议,制定协议遵守NSObjectProtocol协议
<style>p.p1 { margin: 0.0px 0.0px 0.0px 0.0px; font: 24.0px Menlo; color: #ffffff } p.p2 { margin: 0.0px 0.0px 0.0px 0.0px; font: 24.0px "PingFang SC"; color: #4dbf56 } span.s1 { color: #c2349b } span.s2 { } span.s3 { color: #00afca } span.s4 { font: 24.0px Menlo; color: #ffffff } span.s5 { font: 24.0px Menlo }</style>protocol bottomViewDelegate : NSObjectProtocol {
//设置协议的方法
func bottomViewClick(btn : UIButton)
}
<style>p.p1 { margin: 0.0px 0.0px 0.0px 0.0px; font: 24.0px Menlo; color: #ffffff } p.p2 { margin: 0.0px 0.0px 0.0px 0.0px; font: 24.0px Menlo; color: #ffffff; min-height: 28.0px } p.p3 { margin: 0.0px 0.0px 0.0px 0.0px; font: 24.0px Menlo; color: #4dbf56 } p.p4 { margin: 0.0px 0.0px 0.0px 0.0px; font: 24.0px Menlo; color: #00afca } p.p5 { margin: 0.0px 0.0px 0.0px 0.0px; font: 24.0px "PingFang SC"; color: #4dbf56 } p.p6 { margin: 0.0px 0.0px 0.0px 0.0px; font: 24.0px Menlo; color: #e44347 } span.s1 { color: #c2349b } span.s2 { } span.s3 { color: #00afca } span.s4 { color: #ffffff } span.s5 { font: 24.0px "PingFang SC" } span.s6 { color: #93c96a } span.s7 { color: #e44347 } span.s8 { font: 24.0px "PingFang SC"; color: #e44347 } span.s9 { color: #8b84cf } span.s10 { font: 24.0px Menlo; color: #ffffff } span.s11 { font: 24.0px Menlo }</style>class BottomView: UIView {
var btn : UIButton!
//用weak定义代理
weak var delegate : bottomViewDelegate?
override init (frame : CGRect){
super.init(frame: frame)
let arr = ["日","月","周"]
for i in 0..<3 {
btn = UIButton(type: .custom)
btn.frame = CGRect(x: 375/3*i , y: 0, width: 375/3, height: 44)
btn.setTitle(arr[i], for: .normal)
btn.tag = i
btn.backgroundColor = UIColor.gray
btn.setTitleColor(i == 1 ? UIColor.blue : UIColor.black, for: .normal)
btn.addTarget(self, action: #selector(clickedButton(button:)), for: .touchUpInside)
self.addSubview(btn)
}
}
func clickedButton(button : UIButton){
//判断代理是否存在,让代理去执行方法
delegate?.bottomViewClick(btn: button )
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
<style>p.p1 { margin: 0.0px 0.0px 0.0px 0.0px; font: 24.0px "PingFang SC"; color: #4dbf56 } span.s1 { } span.s2 { font: 24.0px Menlo }</style>
Swift-代理