ios - 从多个 CloudKit 记录创建 MapKit Circle 覆盖

Question

我一直在尝试向我的应用程序添加一个新的 map View ，该 View 显示我的 CloudKit 数据库中所有地理围栏区域的叠加层。

目前，我可以使用以下代码从每个位置创建引脚。

func fetchData() {

    let predicate = NSPredicate(format: "TRUEPREDICATE", argumentArray: nil)

    let query = CKQuery(recordType: "Collection", predicate: predicate)

    let operation = CKQueryOperation(query: query)
    operation.desiredKeys = ["Location"]

    operation.recordFetchedBlock = { (record : CKRecord) in

        self.collectionLocation = record.objectForKey("Location") as? CLLocation

        print(self.collectionLocation?.coordinate.latitude)

        self.buildBubbles()

    }

    publicDB!.addOperation(operation)

    operation.queryCompletionBlock = {(cursor, error) in

        dispatch_async(dispatch_get_main_queue()) {

            if error == nil {

            } else {

                print("error description = \(error?.description)")
            }
        }

    }

}

func buildBubbles() {

    if CLLocationManager.isMonitoringAvailableForClass(CLCircularRegion.self) {

        let intrepidLat: CLLocationDegrees =  (self.collectionLocation?.coordinate.latitude)!

        let intrepidLong: CLLocationDegrees = (self.collectionLocation?.coordinate.longitude)!

        let title = "Item"

        let coordinate = CLLocationCoordinate2DMake(intrepidLat, intrepidLong)

        let regionRadius = 300.0

        let region = CLCircularRegion(center: CLLocationCoordinate2D(latitude: coordinate.latitude,
    longitude: coordinate.longitude), radius: regionRadius, identifier: title)

        self.locationManager.startMonitoringForRegion(region)

        let restaurantAnnotation = MKPointAnnotation()

        restaurantAnnotation.coordinate = coordinate;

        restaurantAnnotation.title = "\(title)"

        self.mapView.addAnnotation(restaurantAnnotation)

        // Overlay code goes here 

    }

    else {

        print("System can't track regions")

    }

}

但是当我去添加叠加层时:

let circle = MKCircle(centerCoordinate: coordinate, radius: regionRadius)

self.mapView.addOverlay(circle)

应用程序失败并出现错误:

"This application is modifying the autolayout engine from a background thread, which can lead to engine corruption and weird crashes. This will cause an exception in a future release."

我的猜测是，我在后台线程中做了太多事情，但是当我将“buildBubbles”函数移动到主队列中时，它会添加圆圈叠加层，但只将其中一个位置添加到 map 中。

感谢您花时间查看，我非常感谢任何帮助。

Answer 1

您的气泡功能界面仅提供固定一个位置的功能。尝试更改接口(interface)，例如更改为数组，然后看看会得到什么。您还需要担心如何实际同步其中一个与另一个