swift 怎么使用闭包进行反向传值?

Question

swift 怎么使用闭包进行反向传值

Answer 1

后就是声明一个方法用来保存传入的闭包，并且在将要退出控制器的时候传出textfield的文字：var myClosure: MyColsure?func changeLabelText(closure: MyColsure){myClosure = closure}override func viewWillDisappear(animated: Bool) {super.viewWillDisappear(animated)myClosure!(str:textField.text!)}