在iOS开发中经常会用到代理,Swift开发中的代理这样写:
1、首先定义一个协议
// swift中如何定义协议: 必须遵守NSObjectProtocol
protocol VisitorViewDelegate : NSObjectProtocol{
// 登录回调
func loginBtnWillClick()
// 注册回调
func regiserBtnWillClick()
}
2、方法实现
func loginBtnClick(){
delegate?.loginBtnWillClick()
}
func regiserBtnClick(){
delegate?.regiserBtnWillClick()
}
3、方法调用
private func setupVisitorView(){
// 1、初始化未登录界面
let customView = VisitorView()
customView.delegate = self
view = customView
visitorView = customView
// 2、设置导航条未登录按钮
// navigationController?.navigationBar.tintColor = UIColor.orangeColor()
navigationItem.leftBarButtonItem = UIBarButtonItem(title: "注册", style: UIBarButtonItemStyle.Plain, target: self, action: #selector(regiserBtnWillClick))
navigationItem.rightBarButtonItem = UIBarButtonItem(title: "登录", style: UIBarButtonItemStyle.Plain, target: self, action: #selector(loginBtnWillClick))
}
func loginBtnWillClick() {
print(#function)
}
func regiserBtnWillClick() {
print(#function)
}
