UIAlertController按钮功能不起作用 [英] UIAlertController button function not working

问题描述

let location =  CLLocationCoordinate2D(latitude: 32.075300, longitude: 34.782563)

    @IBAction func DirectionsTolocationButton(_ sender: Any) {
        // Create the AlertController and add its actions like button in ActionSheet
        let ActionSheet = UIAlertController(title: "Please Select A Navigation Service.", message: nil, preferredStyle: .actionSheet)

        let AppleMapsButton = UIAlertAction(title: "Apple Maps", style: .default) { action -> Void in

            let destinationName = (self.barNameTemplate ) 
            self.openMapsAppWithDirections(to: self.CoordinatesTemplate, destinationName: destinationName)
            print("Apple Map Chosen!")

        }
        let WazeButton = UIAlertAction(title: "Waze", style: .default) { action -> Void in

            func openWaze(location : CLLocationCoordinate2D) {
                if UIApplication.shared.canOpenURL(URL(string: "waze://")!) {
                    // Waze is installed. Launch Waze and start navigation
                    let urlStr: String = "waze://?ll=\(location.latitude),\(location.longitude)&navigate=yes"
                    UIApplication.shared.openURL(URL(string: urlStr)!)
                }
                else {
                    // Waze is not installed. Launch AppStore to install Waze app
                    UIApplication.shared.openURL(URL(string: "http://itunes.apple.com/us/app/id323229106")!)
                }
            }
            print("Waze Chosen!")
        }

当我选择WazeButton没有什么反应...... Waze在他们的API中说iv将它添加到我的Plist中：

When i choose WazeButton nothing happens... as Waze says in their API iv added this to my Plist as well :

<key>LSApplicationQueriesSchemes</key>
<array>
        <string>waze</string>
</array>

为什么它不适合我？

why it doesn't work for me?

推荐答案

您需要在函数外添加函数并调用，如下所示。

You need to add function out side the function and call as below.

func openWaze(location : CLLocationCoordinate2D) {
                if UIApplication.shared.canOpenURL(URL(string: "waze://")!) {
                    // Waze is installed. Launch Waze and start navigation
                    let urlStr: String = "waze://?ll=\(location.latitude),\(location.longitude)&navigate=yes"
                    UIApplication.shared.openURL(URL(string: urlStr)!)
                }
                else {
                    // Waze is not installed. Launch AppStore to install Waze app
                    UIApplication.shared.openURL(URL(string: "http://itunes.apple.com/us/app/id323229106")!)
                }
            }

呼叫如下

Calling as below

let WazeButton = UIAlertAction(title: "Waze", style: .default) { action -> Void in

            self. openWaze(location : your corrdinates)// call here your function
            print("Waze Chosen!")
        }

这篇关于UIAlertController按钮功能不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！