我正在使用Google Places API在一个表格视图中输出餐馆的名称。我已经能够解析JSON并获得这些地方的名称和图片。但是，表格视图只包含20个结果。因此，我发现我需要使用提供的next_page_token来获得其余数据。但是，当我获得next_page_token并将其放入请求URL中时，来自第一查询的数据在表格视图内重复多次。

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {

    var location : CLLocation? = locations.last

    var searchURL = NSString(format: "https://maps.googleapis.com/maps/api/place/nearbysearch/json?location=50.940463,-114.077553&radius=50000&type=restaurant&key=MY_API_KEY") as? String

    callAlamo(url: searchURL!)
}    

func callAlamo(url:String){

    Alamofire.request(url).responseJSON(completionHandler: { response in

        self.parseData(JSONData: response.data!)
    })
}

// PARSING JSON DATA FOR GETTING NAME AND PICTURE OF PLACES AND GETTING LATITUDE AND LONGITUDE

func parseData(JSONData:Data){

    do{
        var myReadableJSON = try JSONSerialization.jsonObject(with: JSONData, options: .mutableContainers) as! JSONStandard

        // PARSING THROUGH JSON DATA TO GET NAMES AND PICTURES OF PLACES, THEN PUTTING 
        // THEM INTO AN ARRAY AND OUTPUTTING THEM ONTO TABLE VIEW CELL

        if let results = myReadableJSON["results"] as? [JSONStandard]{
            for i in 0..<results.count{

                let item = results[i]
                print("Item is: ",item)
                let names = item["name"] as! String

                placeNames.append(names)

                // GETTING PHOTO URL WITH photo_reference AND PUTTING THEM INTO imageURL ARRAY

                if let photos = item["photos"] as? [JSONStandard]{

                    for k in 0..<photos.count{

                        let photo = photos[k] as JSONStandard

                        let photoRef = photo["photo_reference"] as! String

                        let photoURL = NSString(format: "https://maps.googleapis.com/maps/api/place/photo?maxwidth=400&photoreference=%@&key=MY_API_KEY", photoRef) as? String
                        imageURL.append(photoURL!)
                    }
                }

                if let geometry = item["geometry"] as? JSONStandard{
                    if let location = geometry["location"] as? [String : Any]{

                            let latitude = location["lat"] as? Double
                            let longitude = location["lng"] as? Double
                    }
                }
            }

            // CHECK TO SEE IF JSON DATA CONTAINS next_page_token. IF IT DOES, REPEAT PROCESS OF 
            // PARSING THROUGH JSON DATA AND GET SECOND PAGE OF DATA. REPEAT UNTIL LAST PAGE
            // DOESN'T CONTAIN next_page_token.

            if (myReadableJSON["next_page_token"] != nil){

                nextPageToken = myReadableJSON["next_page_token"] as! String
                let nextPageGoogleURL = NSString(format:"https://maps.googleapis.com/maps/api/place/nearbysearch/json?pagetoken=%@&key=MY_API_KEY",nextPageToken ) as String
                DispatchQueue.main.async {

                    self.callAlamo(url: nextPageGoogleURL)

                }
            }
            // SHOULD BE PLACED AT THE END OF GATHERING DATA
            locationManager.stopUpdatingLocation()
            self.tableView.reloadData()
            imageURL.removeAll()
            placeNames.removeAll()
        }
    }
    catch{
        print(error)
    }
}

• • 更新日期：**

我能够找到解决我问题的方法。多亏了stack overflow上的另一个线程。
我只需要在parseData（）函数中添加一个if let条件，但要将其置于循环之外，并添加一个定时器延迟，正如在所提供的SO查询的答案中提到的，从发出next_page_token到您可以访问该数据之间存在一个时间延迟，因此我添加了一个轻微的时间延迟。

func parseData(JSONData:Data){

    do{
        var readableJSON = try JSONSerialization.jsonObject(with: JSONData, options: .mutableContainers) as! JSONStandard

        placeNames.removeAll()

        if let results = readableJSON["results"] as? [JSONStandard]{
            print("JSON: ",results)
            for i in 0..<results.count{

                let item = results[i]
                let names = item["name"] as! String

                placeNames.append(names)

                if let geometry = item["geometry"] as? JSONStandard{
                    if let location = geometry["location"] as? [String : Any]{

                         self.latitude = (location["lat"] as? Double)!
                         self.longitude = (location["lng"] as? Double)!
                    }
                }

                let marker = GMSMarker(position: CLLocationCoordinate2D(latitude: latitude, longitude: longitude))
                marker.icon = UIImage(named: "locationMarker")
                print(placeNames[i],"\n")
                marker.title = placeNames[i]
                marker.snippet = "Nothing"
                marker.map = self.googleMapsContrainer
            }
        }

        if let pageToken = readableJSON["next_page_token"]{

            let newURL = NSString(format:"https://maps.googleapis.com/maps/api/place/nearbysearch/json?pagetoken=\(pageToken)&key=MY_API_KEY" as NSString) as? String

            let when = DispatchTime.now() + 2
            DispatchQueue.main.asyncAfter(deadline: when, execute: { 

                self.callAlamo(url: newURL!)
            })

        }
    }
    catch{
        print(error)
    }
}`