iOS 10 NSUserActivity,位置建议 – MKMapItem不会出现在地图中

2019年7月28日 252次阅读

我正在尝试将位置建议显示在“您想去哪里？”下的列表中的Apple地图中. iOS 10中的NSUserActivity现在有一个mapItem属性,我用MKMapItem设置它,我用我用地理坐标和地名创建的MKPlacemark创建.

我去“地图”时不会显示地名.经过WWDC 2016,会议240几次,我仍然找不到我做错了什么.

最佳答案 mapItem必须来自带有地理坐标和地名的MKLocalSearch请求.您从MKLocalSearchResponse获得的mapItems是Apple Maps将接受的mapItems.

    let coordinate = CLLocationCoordinate2D(latitude: 38.89005200, longitude: -77.00251600)
    var points = [MKMapPointForCoordinate(coordinate)]
    let mapRect = MKPolygon(points: &points, count: 1).boundingMapRect
    let region = MKCoordinateRegionForMapRect(mapRect)
    let request = MKLocalSearchRequest()
    request.naturalLanguageQuery = "Supreme Court Historical Society"
    request.region = region
    let localSearch:MKLocalSearch = MKLocalSearch(request: request)

    localSearch.start(completionHandler: { (response:MKLocalSearchResponse?, error:Error?) in
        if error == nil {
            activity.mapItem = response!.mapItems[0]
            var userInfo = [String: AnyObject]()
            userInfo["placemark"] = NSKeyedArchiver.archivedData(withRootObject: activity.mapItem.placemark)
            activity.userInfo = userInfo
            activity.contentAttributeSet?.supportsNavigation = true
            activity.contentAttributeSet?.supportsPhoneCall = true
        }
    })
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