Add a call to a function from within a UIAlertController

Question

I have an alert in my iOS app, with two buttons on the alert. I'd like to call a function I have, called searchTheWeb() when the user selects that option:

alert.addAction(UIAlertAction(title: "Close", style: UIAlertActionStyle.default, handler: nil))
alert.addAction(UIAlertAction(title: "Search The Web!", style: UIAlertActionStyle.default, handler: nil))

func searchTheWeb(){
    let word =  self.userInfo.text! + self.faceResults.text!  + self.labelResults.text!
    if let encoded = word.addingPercentEncoding(withAllowedCharacters: .urlFragmentAllowed), let url = URL(string: "https://www.google.com/#q=\(encoded)") {
        if #available(iOS 10.0, *) {
            UIApplication.shared.open(url, options: [:], completionHandler: nil)
        } else {
            UIApplication.shared.openURL(url)
        }
    }
}

So in that addAction with the title Search The Web! How can I call that function?

@vadian I thought that myself so made a call to the function in the handle, but that just didn't work. Check out AdamPro's answer below, that works! — Eoghan Casey, Apr 05 '18 at 16:49
It's worth it to read the [documentation](https://developer.apple.com/documentation/uikit/uialertaction/1620097-init) — vadian, Apr 05 '18 at 16:53

score 1 · Accepted Answer · answered Apr 05 '18 at 16:45

1

You just need to change how you declare your searchTheWeb action to the following:

let search = UIAlertAction(title: "Search The Web!", style: .default) { [weak self] _ in
    self?.searchTheWeb()
}
alert.addAction(search)

answered Apr 05 '18 at 16:45

AdamPro13

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this works a charm, appreciate that thanks Adam! – Eoghan Casey Apr 05 '18 at 16:47

score 1 · Answer 2 · answered Apr 05 '18 at 16:46

Using alert handler

 alert.addAction(UIAlertAction(title: "Close", style: UIAlertActionStyle.default, handler: nil))

let search = UIAlertAction(title: "Search The Web!", style: UIAlertActionStyle.default, handler: { (action) -> Void in
    self.searchTheWeb()
})
alert.addAction(search)

func searchTheWeb(){
    let word =  self.userInfo.text! + self.faceResults.text!  + self.labelResults.text!
    if let encoded = word.addingPercentEncoding(withAllowedCharacters: .urlFragmentAllowed), let url = URL(string: "https://www.google.com/#q=\(encoded)") {
        if #available(iOS 10.0, *) {
            UIApplication.shared.open(url, options: [:], completionHandler: nil)
        } else {
            UIApplication.shared.openURL(url)
        }
    }
}

Add a call to a function from within a UIAlertController

2 Answers2