Question

我正在尝试通过iOS使用Google Places Web服务（使用swift）。我想这样做的原因 - 我想允许在地图上浏览地点，即使它们不在附近（允许使用iOS提供的库的唯一搜索）。我还需要以编程方式进行（因为在一个用例中我想允许浏览地图，而在另一个用例中 - 我希望这些地方是恒定的而不是基于地图相机而改变）。我无法使用iOS地方选择器，因为我希望地图显示有关其上的位置的信息（并且在一个用例中不会更改）... （如果您对此问题有更好的设计理念，请告诉我们。）

调用Google Places API网络服务时，我收到错误303。在Google API网络服务上，它不会对通话进行计数，因此我认为它失败了，尽管303应该重定向。

我构建了一个用于与Web服务通信的类（我在配置中保存了服务器地址）。此类的结构也是为了立即提供结果（而不是在回调中）。

为什么我会收到错误而不是重定向？有办法处理吗？有什么想法可以做些什么来避免重定向？

谢谢！

这是我的代码的（模板） - 我减少了很多逻辑并留下了对Web服务的调用（PlaceMarker只是我返回的一个类，你可以将它修改为String）：

class GooglePlacesWS : NSObject, NSURLConnectionDelegate, NSURLConnectionDataDelegate , URLSessionDelegate{

var DataReady : Bool!;
var Data : Foundation.Data!;
var opQueue : OperationQueue!;
var _responseData : NSMutableData!;
var error = false;

func getPlacesNear(_ point : CLLocationCoordinate2D, _ radius: Double)->[PlaceMarker]!
{
    var retVal  = [PlaceMarker]();

    var locationJson = ["location": String(format:"%f, %f",point.latitude,point.longitude), "key": “MyKey”];

    if (radius > 0){
        locationJson["raidus"] = String(format:"%d",Int(radius));
    }

    // Fires the request to the server
    var reply : String = HtmlToText(FireRequest(locationJson));
    if reply == "" { return nil}

    return retVal;
}

//MARK: Connection

var session : URLSession? = nil;
var dataTasks : URLSessionTask? = nil;

func sendRequestNew(_ request : URLRequest)
{
    DataReady = false;
    Data = nil;

    let task = session!.dataTask(with: request, completionHandler: {data, response,error in

        if (error != nil){

            NSLog("Error reading data from web service: " + error!.localizedDescription);
            self.Data = nil;
            self.error = true;
            self.DataReady = true;
        }
        else{
            if (data != nil){
                self.Data = data;
                OSMemoryBarrier();
                self.DataReady = true;
            }
        }

    });
    task.resume();
    dataTasks = task;
}

// Changes a string to an HTML friendly tags (so the XML will transfer a string)
func textToHtml (_ htmlString : String) -> String
{
    var retHtml = htmlString;
    retHtml = retHtml.replacingOccurrences(of: "&",  with: "&amp;");
    retHtml = retHtml.replacingOccurrences(of: "<",  with: "&lt;");
    retHtml = retHtml.replacingOccurrences(of: ">",  with: "&gt;");
    retHtml = retHtml.replacingOccurrences(of: "\"", with: "&quot;");
    retHtml = retHtml.replacingOccurrences(of: "'",  with: "&#039;");
    //retHtml = retHtml.stringByReplacingOccurrencesOfString("\n", withString: "<br>");
    return retHtml;
}

// Changes an HTML string to a regular xml (changes the & tags to actual signs)
func HtmlToText(_ textString : String)->String
{
    var retString: String = textString;
    retString = retString.replacingOccurrences(of: "&amp;",  with:"&");
    retString = retString.replacingOccurrences(of: "&lt;",  with:"<");
    retString = retString.replacingOccurrences(of: "&gt;",  with:">");
    retString = retString.replacingOccurrences(of: "&quot;", with:"\"");
    retString = retString.replacingOccurrences(of: "&#039;",  with:"'");
    retString = retString.replacingOccurrences(of: "<br>", with:"\n");
    return retString;
}


// Sends the request to the server
func FireRequest (_ query : [String:String]) ->String
{
    var retVal : String = "";

    do{
        // Builds the final URL request (adds the headers, and the WS addy)
        let config :UserDefaults = UserDefaults();
        //var myDict: NSDictionary?
        if let path : String = config.object(forKey: "googleServerAddy") as? String
        {
            let url = URL(string: path);
            //let theRequest = NSMutableURLRequest(url: url!);
            var request = URLRequest(url: url!);
            request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
            request.httpMethod = "GET";
            request.httpBody = try JSONSerialization.data(withJSONObject: query, options: []);


            sendRequestNew(request);

            while (DataReady == false)
            {
                Thread.sleep(forTimeInterval: 0.01);
            }

            if (!error)
            {
                let result : Foundation.Data = Data!;

                // Reads the response...
                retVal = NSString(data: result, encoding:String.Encoding.utf8.rawValue)! as String;
            }
            else
            {
                retVal = "";
            }
        }
    }
    catch{

    }

    return retVal;
}


//MARK: NSURLConnection delegates
func connection(_ connection: NSURLConnection, willSend request: URLRequest, redirectResponse response: URLResponse?) -> URLRequest? {

    return request;
}


override init() {
    super.init();

    opQueue = OperationQueue();

    session = URLSession(configuration: URLSessionConfiguration.default, delegate: self, delegateQueue: opQueue);
    }
}

Answer 1

你可以使用Alamofire，工作正常。用它来谷歌街景图像

import Foundation
import Alamofire
import AlamofireImage


class GoogleData {

    static let dataService = GoogleData()

    func getGoogleImages(_ latitude: Double, longitude: Double, heading: Double, id: String, key: Int){

        let url = "https://maps.googleapis.com/maps/api/streetview?size=400x300&location=" + String(latitude) + "," + String(longitude) +  "&heading=" + String(heading) +  "&fov=120&&pitch=-0.76&key=" + GOOGLE_API_KEY

            Alamofire.request(url).responseImage { (response) -> Void in

            print(response)
            guard let image = response.result.value else { return }

            print("alamo \(url) ")
            let returnObj = [image]

            ImageUtils.saveGoogleImageToFile(image , key: key, id: id)
            NotificationCenter.default.post(name: NSNotification.Name(rawValue: googleGetImagesNotificationKey), object: returnObj)
        }
    }
}

称呼它：

GoogleData.dataService.getGoogleImages(yourlatitude, longitude: your.longitude, heading: someHeading, id: someId, key: someKey )

Answer 2

所以我遇到的问题来自：

addingPercentEncoding(withAllowedCharacters: NSCharacterSet.urlQueryAllowed)

看来 - 此解决方案会强制重定向。我不知道函数let actPath = path + "?" + query; let url = URL(string: actPath); var request = URLRequest(url: url!); request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type") request.httpMethod = "GET";所以我想使用httpBody来传输GET数据，这显然是错误的......

将代码更改为：

query

为我解决了这个问题。 notice children.push(child)是get字符串的查询 - 类似于

location = 1.1,2.2＆amp; radius = 5＆amp; key = MY_KEY

使用swift的Google Places API网络服务返回错误303

2 个答案: