ios - 在 while 循环中快速保存到 Parse

Question

所以我在将一些项目放入对象后调用保存时遇到了问题。我转到 API 并下载了一些信息，然后将其保存到另一个系统以供临时使用，但是 .save() 似乎只保存了 2 个项目，没有选择的特殊模式。谁能解释一下问题出在哪里？

let url = URL(string: link)
    let spots = PFObject(className:"spot")
    let task = URLSession.shared.dataTask(with: url!) { (data, response, error) in

        if error != nil {
            print(error)
        }
        else{
            if let urlContent = data{

                do{
                    let jsonResult = try JSONSerialization.jsonObject(with: urlContent, options: JSONSerialization.ReadingOptions.mutableContainers)
                    let results = (jsonResult as! NSDictionary)["results"]
                    let venueList = (results as! NSArray)
                    //print(jsonResult)
                    var i = 0
                    while i < venueList.count{
                        let venues = venueList[i] as! NSDictionary
                        let name = venues["name"] as! String
                        let geometry = venues["geometry"] as! NSDictionary
                        let location = geometry["location"] as! NSDictionary
                        let cLat = location["lat"] as! Double
                        let cLon = location["lng"] as! Double
                        let vPoint = PFGeoPoint(latitude: cLat, longitude: cLon)
                        //print(name," ", vPoint)
                        spots["venue"] = name
                        spots["name"] = vPoint
                        do{
                           try HotSpots.save()
                            print("Saved! ",name," ", vPoint)
                        }
                        catch{
                            print("Save Error")
                        }
                        i+=1
                    }




                }
                catch{
                    print("JSON Error")
                }
            }
        }
    }
    task.resume()
}

Answer 1

问题是您总是将这两个值保存在同一个 PFObject 实例中。

在循环中移动 let spots = PFObject(className:"spot") 行。

PS:使用 Swift 原生类型。例如这样效率更高

let location = geometry["location"] as! [String:Double]
let cLat = location["lat"]!
let cLon = location["lng"]!