在 Swift 中将 CLLocationCoordinate2D 转换为 CLLocation 时出错

Posted 2023-03-05

【中文标题】在 Swift 中将 CLLocationCoordinate2D 转换为 CLLocation 时出错

【英文标题】：Error converting CLLocationCoordinate2D to CLLocation in Swift

【发布时间】：2016-08-31 19:49:28

【问题描述】：

我正在尝试将 cllocationcoordinate2d 转换为 cllocation。我在下面代码的第 12 行收到错误“容器文字中的预期表达式”。我还在第 13 行收到错误“无法将 cllocationcoordinate2d 类型的值转换为预期值 cllocation”，但这是因为第 12 行工作不正常。

@IBAction func makeEvent(sender: UIButton)
    
        let center = CLLocationCoordinate2D(latitude: loc1.coordinate.latitude, longitude: loc1.coordinate.longitude)
        let lat: CLLocationDegrees = center.latitude
        let long: CLLocationDegrees = center.longitude
        self.pointAnnotation1 = MKPointAnnotation()
        self.pointAnnotation1.title = "Event"
        self.pointAnnotation1.coordinate = CLLocationCoordinate2D(latitude: lat, longitude: long)
        self.pinAnnotationView = MKPinAnnotationView(annotation: self.pointAnnotation1, reuseIdentifier: nil)
        self.mapView?.centerCoordinate = self.pointAnnotation1.coordinate
        self.mapView.addAnnotation(self.pinAnnotationView.annotation!)
        CLLocation *center = [[CLLocation alloc] initWithLatitude:latt longitude:longg]
        eventRecord.setObject(center, forKey: "event")
        let publicData = CKContainer.defaultContainer().publicCloudDatabase
        publicData.saveRecord(eventRecord)  record, error in
        
        if error == nil
        
            print("Location saved")
        
        loadEvent() (error, records) in
            if error != nil 
                print("error fetching locations")
             else 
                print("Found Event")
            
        
    

【问题讨论】：

CLLocation *center = [[CLLocation alloc] initWithLatitude:latt longitude:longg] 是 Objective-C，而不是 Swift。

【参考方案1】：

您将目标 c 和 swift 混淆了。 试试这个：

    let center = CLLocation(latitude: lat, longitude: long)

代替：

    CLLocation *center = [[CLLocation alloc] initWithLatitude:latt longitude:longg]