Alamofire AFError在使用Flickr API時

Question

我使用Alamofire從flickr API獲取JSON數據。 此處若功能，準備URL的數組從響應：在API URL

func urlTolinkslist (tag: String) { 
    print (viewSearchBar.text) 
    let url = "https://api.flickr.com/services/feeds/photos_public.gne?tags=\(tag.replacingOccurrences(of: " ", with: "%20"))&format=json&nojsoncallback=1" 
    Alamofire.request(url).validate().responseJSON { response in 
     switch response.result { 
     case .success(let value): 
      let json = JSON(value) 
      let items = json["items"] 
      self.linksList = [] 
      for i in 0..<items.count { 
       let item = items[i] 
       let media = item["media"] 
       var link = String(describing: media["m"]) 
       self.linksList.append(link) 
      } 
      print("count: \(self.linksList.count)") 
      self.viewCollectionView.reloadData() 
     case .failure(let error): 
      print(error) 
     } 
    } 
} 

「標籤」是我從一個搜索欄獲取參數。在大多數情況下，它工作正常，但在某些情況下，我得到：

[Result]: FAILURE: responseSerializationFailed(Alamofire.AFError.ResponseSerializationFailureReason.jsonSerializationFailed(Error Domain=NSCocoaErrorDomain Code=3840 "Invalid escape sequence around character 1029." UserInfo={NSDebugDescription=Invalid escape sequence around character 1029.})) 

我想可能會有一些額外的字符，但我不知道如何解決它。

Answer 1

讓Alamofire編碼爲您的參數：

func urlTolinkslist (tag: String) { 
    let url = "https://api.flickr.com/services/feeds/photos_public.gne" 
    var dict = [String:AnyObject]() 
    dict["tags"] = tag 
    dict["format"] = "json" 
    dict["nojsoncallback"] = 1 
    Alamofire.request(.GET, url, parameters: dict, encoding: .URLEncodedInURL, headers: nil).validate().responseJSON { response in 
     switch response.result { 
     case .success(let value): 
      let json = JSON(value) 
      let items = json["items"] 
      self.linksList = [] 
      for i in 0..<items.count { 
       let item = items[i] 
       let media = item["media"] 
       var link = String(describing: media["m"]) 
       self.linksList.append(link) 
      } 
      print("count: \(self.linksList.count)") 
      self.viewCollectionView.reloadData() 
     case .failure(let error): 
      print(error) 
     } 
    } 
}