Question

您好我正在使用CLLocation到我的应用程序，我已经初始化了我的CLLocationManager：

func initLocationManager(){    
    locationManager = CLLocationManager()
    locationManager.delegate = self
    locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters
    let authstate = CLLocationManager.authorizationStatus()
    if(authstate == CLAuthorizationStatus.NotDetermined || authstate == CLAuthorizationStatus.Denied){
        println("Not Authorised")
        locationManager.requestWhenInUseAuthorization()
    }
    locationManager.startUpdatingLocation() 
}

我还在我的plist中添加了NSLocationAlwaysUsageDescription和NSLocationWhenInUseUsageDescription键。

第一次打开我的应用程序时，我收到提示消息，我的应用程序想要访问位置，它有2个按钮允许，不允许。如果我点击不允许按钮并关闭应用程序，当我再次打开它时，我再也没有得到提示消息。

每次用户打开应用时，如何显示此提示消息？谢谢

Answer 1

每次提示警报不是一种有效的方法。
作为替代方案，您只能在位置服务的情况下显示警报 已停用或＆＃34; 不允许＆＃34;最初。

首先执行代码提示警报，并在位置服务 已禁用

时执行自定义提醒

import UIKit

import CoreLocation

class ViewController: UIViewController,CLLocationManagerDelegate {    

    var locationManager = CLLocationManager()

    override func viewDidLoad() {
        super.viewDidLoad()

        initLocationManager()


        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func initLocationManager(){

        let status = CLLocationManager.authorizationStatus()

        if(status == CLAuthorizationStatus.NotDetermined) {
            locationManager = CLLocationManager()
            locationManager.delegate = self
            locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters

            let iosVersion = NSString(string: UIDevice.currentDevice().systemVersion).doubleValue

            if iosVersion >= 8.0 {
                //For Foreground
                locationManager.requestWhenInUseAuthorization()
            }
            locationManager.startUpdatingLocation()

        } else {
            if(status != CLAuthorizationStatus.AuthorizedWhenInUse) {


                var alert = UIAlertView(title: "Location", message: "Please turn on Location Services", delegate: nil, cancelButtonTitle: "Cancel")
                alert.addButtonWithTitle("Open Setting")
                alert.show()

                /*Add Action on Open Setting alertbutton to directly open settings in iOS 8 and later

                ->    UIApplication.sharedApplication().openURL(NSURL(string: UIApplicationOpenSettingsURLString)!)*/

            }
        }
    }
}

Answer 2

一旦用户拒绝，就无法执行此操作，您必须显示一个对话框，向用户说明他/她必须转到“设置”并手动允许该功能。

Answer 3

此消息要求获得使用设备GPS的权限，并尝试获取设备的位置，这就是需要GPS的原因。第二个你不想显示它你可以使用NSUseDefaults创建条件并存储密钥然后不要调用方法locationmanager startupdatinglocation。这是不再显示的唯一方法，否则每次都会显示。

CLLocationManager授权消息

3 个答案: