如何自动调用@IBAction函数

本文介绍了如何自动调用@IBAction函数的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我不确定如何在Swift中为@IBAction自动调用点击功能.

Hi I am not sure how to do auto call a click-function for an @IBAction in Swift.

说，我有一个计时器功能，当倒计时完成时，我需要以编程方式调用点击功能@IBAction，而不是要求用户单击按钮

Say, I have a timer function, when countdown is finished, I need to call the Click-function @IBAction as below programmatically instead of asking user to click the button

如何迅速做到?



@IBAction func DoSomeTask(sender: UIButton) {

- code--

}

推荐答案

您可以通过将IBAction的参数设置为Optional来更改IBAction的签名，如下所示:

You can either change the signature of the IBAction by making its parameter an Optional like this:

@IBAction func doSomeTask(sender: UIButton?) {
    // code
}

然后以nil作为参数调用它:

and then call it with nil as an argument:

doSomeTask(nil)

或者您可以将IBAction用作实函数的包装器:

Or you can use the IBAction as a wrapper for the real function:

func doSomeTaskForButton() {
    // ...
}

@IBAction func doSomeTask(sender: UIButton) {
    doSomeTaskForButton()
}

意味着您可以在任意位置调用 doSomeTaskForButton().

meaning you can then call doSomeTaskForButton() from wherever you want.

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