Question

我正在尝试从GoogleMaps API获取数据后在MKMapView上显示注释。 HTTP请求成功，我可以在Xcode底部的控制台中看到结果。但是，在尝试在地图上显示注释时，它不会返回任何内容。只有mu当前位置（蓝点）。这是代码：

func plotPositions(_ data: [Any]) {

    //Remove any existing custom annotations but not the user location blue dot
    for annotation: MKAnnotation in mapView.annotations {

        if (annotation is MapPoint) {

            mapView.removeAnnotation(annotation)
        }
    }

    //Loop through the array of places returned from the Google API
    for i in 0..<data.count {

        //Retrieve the NSDictionary object in each index of the array
        let place: [AnyHashable: Any]? = (data[i] as? [AnyHashable: Any])

        //There is a specific NSDictionary object that gives us the location info
        let geo: [AnyHashable: Any]? = (place?["geometry"] as? [AnyHashable: Any])

        // Get the lat and long for the location
        let loc: [AnyHashable: Any]? = (geo?["location"] as? [AnyHashable: Any])

        //Get the name and address info for adding to a pin
        let name: String? = (place?["name"] as? String)
        let vicinity: String? = (place?["vicinity"] as? String)

        // Create a special variable to hold this coordinate info
        var placeCoord: CLLocationCoordinate2D = CLLocationCoordinate2D(latitude: 0.0, longitude: 0.0)

        // Set the lat and long
        if let latitude = loc?["lat"] as? CDouble, let longitude = loc?["lat"] as? CDouble {
            placeCoord.latitude = latitude
            placeCoord.longitude = longitude
        }

        //Create a new annotation
        let placeObject = MapPoint(name: name!, address: vicinity!, coordinate: placeCoord)
        mapView.addAnnotation(placeObject)
    }
}

知道它为什么不显示？我错过了什么吗？

谢谢！

Answer 1

let placeObject = CustomPointAnnotation()
placeObject.coordinate = placeCoord
placeObject.title = name
placeObject.subtitle = vicinity

尝试使用CustomPointAnnotation对象作为注释

从GoogleMaps API获取数据后，注释不会显示在MKMapView上

1 个答案: