swift - didEnterRegion 有时只会被解雇

Question

我写了下面的代码，这是我能想到的最基本的 Swift 3 代码，用于检查我的应用程序是否可以检测 iBeacon 是否可用。然而，didEnterRegion 只在极少数情况下启动一次。我大概在我的手机上运行了 20 次，它只被触发了两次。问题似乎不是信标本身，因为当我使用 App 商店中的应用程序时，它总是检测到我的 iBeacon。知道为什么很少调用此回调吗？PS:我已经在Info.plist中添加了Privacy - Location Always Usage Description

import UIKit
import CoreLocation

class ViewController: UIViewController {

let locationManager = CLLocationManager()

@IBOutlet weak var textLabel: UILabel!

override func viewDidLoad() {
    super.viewDidLoad()
    locationManager.requestAlwaysAuthorization()
    locationManager.delegate = self
    // 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.
}

@IBAction func startMonitoring(_ sender: Any) {
    if let uuid = UUID(uuidString: "10F86430-1346-11E4-9191-0800200C9A66") {
        let beaconRegion = CLBeaconRegion(proximityUUID: uuid, major: 1, minor: 1,identifier: "iBeacon")
        locationManager.startMonitoring(for: beaconRegion)
        textLabel.text = "Monitoring"
    }
}
}

extension ViewController: CLLocationManagerDelegate {
func locationManager(_ manager: CLLocationManager, monitoringDidFailFor region: CLRegion?, withError error: Error) {
    textLabel.text = "\(error.localizedDescription)"
}

func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
    textLabel.text = "\(error.localizedDescription)"
}

func locationManager(_ manager: CLLocationManager, didEnterRegion region: CLRegion) {
        textLabel.text = "Found a new beacon"
}
}

Answer 1

您必须退出该区域，等待 30 秒左右，然后再次进入才能触发。如果您住在该地区，则不会触发。