当用户输入CLLocation时如何通知用户？ [英] How to notify user when he enters a CLLocation?

问题描述

情况：

我遵循了以下教程：

https://www.raywenderlich.com/95014/geofencing-ios-swift

---

问题：

以下函数永远不会被触发：

AppDelegate.swift

  func locationManager（管理员：CLLocationManager，didEnterRegion区域：CLRegion）{
如果区域是CLCircularRegion {
 handleRegionEvent（region）
} 
} 
 
 func locationManager（manager： CLLocationManager，didExitRegion区域：CLRegion）{
如果区域是CLCircularRegion {
 handleRegionEvent（region）
} 
} 
 
 func handleRegionEvent（region：CLRegion！ ）{
 
 print（触发了Geofence！）
 
 //如果应用程序处于活动状态，则显示警报
如果UIApplication.sharedApplic ation（）。applicationState == .Active {
如果let message = notefromRegionIdentifier（region.identifier）{
如果let viewController = window？.rootViewController {
 showSimpleAlertWithTitle（ Congratulations，消息： 您刚发现： + message，viewController：viewController）
} 
} 
} else {
 //否则显示本地通知
 let notifications = UILocalNotification（ ）
 notification.alertBody =您刚刚找到： + notefromRegionIdentifier（region.identifier）！ 
 
 notification.soundName =默认; 
 UIApplication.sharedApplication（）。presentLocalNotificationNow（notification）
} 
} 
  

---

问题：

该教程是为iOS 8编写的。 iOS 9.3版。您认为是什么导致了此问题，以及如何解决该问题？

解决方案

请确保以下两点：-

1。）您已将它们添加到 viewDidLoad（）：-

  locationManager.delegate =自我
 locationManager.desiredAccuracy = kCLLocationAccuracyBest 
 locationManager.distanceFilter = kCLDistanceFilterNone 
 locationManager.requestWhenInUseAuthorization（）
 locationManager。 startMonitoringSignificantLocationChanges（）
 locationManager.startUpdatingLocation（）
  

的另一种选择专门针对Swift 2.2的requestWhenInUseAuthorization（）和 startUpdatingLocation（）初始化，因为在Swift 2.2中不赞成使用选择器的字符串文字，而是在其中您需要使用的新运算符#selector。 ：-

您也可以使用：-

  locationManager.delegate =自我
 locationManager.desiredAccuracy = kCLLocationAccuracyBest 
 locationManager.distanceFilter = kCLDistanceFilterNone 
 
 locationManager.startMonitoringSignificantLocationChanges（）
如果locationManager.respondsToSelector（#selector（locationManager.requestWhenInUseAuthorization）） {
 locationManager.requestWhenInUseAuthorization（）
} 
 else {
 locationManager.startUpdatingLocation（）
} 
 //首选第一个。 
  

2。）您已经用：-

更新了info.plist。

NSLocationAlwaysUsageDescription：字符串：->我需要位置。

NSLocationWhenInUseUsageDescription：String：->我需要位置。

privacy-位置用法描述：字符串：->我需要位置。

根据应用程序的需要编辑我需要位置

PS：-如果仍然不调用 locationManager 函数

Simulator：-在模拟器设置中查找应用程序的位置设置。

设备：-进入设置>隐私>定位服务>您的应用>始终。

您可能还会发现此说明有用：- https://stackoverflow.com/a/26090094/6297658

SITUATION:

I followed the following tutorial:

https://www.raywenderlich.com/95014/geofencing-ios-swift

---

PROBLEM:

The following functions never get triggered:

AppDelegate.swift

func locationManager(manager: CLLocationManager, didEnterRegion region: CLRegion) {
    if region is CLCircularRegion {
        handleRegionEvent(region)
    }
}

func locationManager(manager: CLLocationManager, didExitRegion region: CLRegion) {
    if region is CLCircularRegion {
        handleRegionEvent(region)
    }
}

func handleRegionEvent(region: CLRegion!) {

     print("Geofence triggered!")

    // Show an alert if application is active
    if UIApplication.sharedApplication().applicationState == .Active {
        if let message = notefromRegionIdentifier(region.identifier) {
            if let viewController = window?.rootViewController {
                showSimpleAlertWithTitle("Congratulations", message: "You just found: " + message , viewController: viewController)
            }
        }
    } else {
        // Otherwise present a local notification
        let notification = UILocalNotification()
        notification.alertBody = "You just found: " + notefromRegionIdentifier(region.identifier)!

        notification.soundName = "Default";
        UIApplication.sharedApplication().presentLocalNotificationNow(notification)
    }
}

---

QUESTION:

The tutorial was written for iOS 8. I am currently on iOS 9.3. What caused this issue in your opinion and how do I fix it ?

解决方案

Make sure of two things :-

1.) You have added These to your viewDidLoad() :-

    locationManager.delegate = self 
    locationManager.desiredAccuracy = kCLLocationAccuracyBest
    locationManager.distanceFilter = kCLDistanceFilterNone
    locationManager.requestWhenInUseAuthorization()
    locationManager.startMonitoringSignificantLocationChanges()
    locationManager.startUpdatingLocation()

Another alternative to requestWhenInUseAuthorization() and startUpdatingLocation() initialisation in specific to Swift 2.2, since in Swift 2.2 the string literals for selectors is deprecated, and instead there this new operator #selector that you need to be using. :-

you can also use :-

    locationManager.delegate = self 
    locationManager.desiredAccuracy = kCLLocationAccuracyBest
    locationManager.distanceFilter = kCLDistanceFilterNone

    locationManager.startMonitoringSignificantLocationChanges()
     if locationManager.respondsToSelector(#selector(locationManager.requestWhenInUseAuthorization)) {
        locationManager.requestWhenInUseAuthorization()
    }
    else {
        locationManager.startUpdatingLocation()
    }
      //Prefer the FIRST ONE.

2.) You have updated your info.plist with :-

NSLocationAlwaysUsageDescription : String :-> I need location.

NSLocationWhenInUseUsageDescription: String :-> I need location.

privacy - location usage description: String :-> I need location.

Edit I need location according to the app's need

PS :- If it still not calls your locationManager functions

Simulator :- look for location settings of your app in your simulator settings.

Device: - Go in settings > Privacy > Location services > Your app > Always.

you also might find this explanation useful : - https://stackoverflow.com/a/26090094/6297658

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