我试图按照this tutorial为位置设置地理围栏,但我想使用从我的firebase数据库中获取的一系列信息创建地理围栏。有没有人知道我会怎么做,或有任何教程,他们可以为我链接?因为我对斯威夫特还很陌生,所以我很难想象我会怎么做。有人能帮我解释一下我会做什么,或者把我指给能解释这一点的人/某个地方吗?

最佳答案

像这样:

func startMonitoring(_ manager:CLLocationManager, region:CLCircularRegion) {
    if !CLLocationManager.isMonitoringAvailable(for: CLCircularRegion.self) {
        print("Cannot monitor location")
        return
    }
    if CLLocationManager.authorizationStatus() != .authorizedAlways {
        print("Please grant access")
    } else {
        let locationManager = CLLocationManager()
        locationManager.startMonitoring(for: region)
    }
}

func getRegionForLocation(_ location:CLLocation) -> CLCircularRegion {
    let radiusMeters:Double = 1000
    let identifier = "MyGeofence \(location)"

    let region = CLCircularRegion(center: location.coordinate, radius: radiusMeters, identifier: identifier)

    region.notifyOnEntry = true
    region.notifyOnExit = !region.notifyOnEntry

    return region
}

func getLocationsFromFireBase() -> [CLLocation] {
    var locations:[CLLocation] = []

    // .. populate with locations from DB

    return locations
}


//where you want to enable
let locationManager = CLLocationManager()
locationManager.requestAlwaysAuthorization()

let locations = getLocationsFromFireBase()

for location in locations {
    let region = getRegionForLocation(location)
    startMonitoring(locationManager, region: region)
}

我正在讨论如何启用位置访问(例如,必须在info.plist中添加nslocationalwaysusagedescription),但显示了添加多个地理围栏的一般原则。您还需要向cllocationmanager添加一个委托,以便在设备进入或退出地理围栏时收到通知。

关于swift - 如何使用一系列信息创建地理围栏? ,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/44266172/

10-10 23:31