ios - 使用 Swift 在后端存储数据

Question

我正在开发一个使用 Kinvey 作为后端的应用程序。我有一组对象Questions，我需要存储在数据库中，其中包括Qnumber和Qanswer1属性Qanswer2。我的问题是当我尝试将这一系列问题保存在数据库中时，它总是将最后一个对象保存在数组中 n 次。

假设我将这些数据存储在数组中：

Questions[0].Qnumber = 1
Questions[0].Qanswer1 = "a1"
Questions[0].Qanswer2 = "b1"

Questions[1].Qnumber = 2
Questions[1].Qanswer1 = "a2"
Questions[1].Qanswer2 = "b2"

Questions[2].Qnumber = 3
Questions[2].Qanswer1 = "a3"
Questions[2].Qanswer2 = "b3"

当我使用循环将这些对象保存在后端并检查数据库时，我得到：

Qnumber : 3 , 3 , 3 Qanswer1 : a3, a3 , a3 Qanswer2: b3, b3, b3

我花了 2 天时间试图解决这个问题，但我不能这是我的代码：

@IBAction func saveButton(sender: AnyObject) {

    let i = Int(numberOfQuestions)
    var newQ : Questions = Questions()
    for var index = 0; index < i; ++index {
        newQ.Qnumber = String(index + 1)
        newQ.Qanswer1 = cellAnswer1[index]
        newQ.Qanswer2 = cellAnswer2[index]
        saveObject(newQ)
    }
}

func saveObject (newQuestion: Questions){
    let store = KCSAppdataStore.storeWithOptions([
        KCSStoreKeyCollectionName : "Questions",
        KCSStoreKeyCollectionTemplateClass : Questions.self
        ])


    store.saveObject(
        newQuestion,
        withCompletionBlock: { (objectsOrNil: [AnyObject]!, errorOrNil: NSError!) -> Void in
            if errorOrNil != nil {
                NSLog("an error happened: %@", errorOrNil)
            } else {
                //save was successful
                NSLog("A new question is saved sucessfully")
            }
        },
        withProgressBlock: nil
    )
}

Answer 1

我认为您应该尝试将 newQ 的首字母放入 for 循环

for var index = 0; index < i; ++index {
    var newQ : Questions = Questions()
    newQ.Qnumber = String(index + 1)
    newQ.Qanswer1 = cellAnswer1[index]
    newQ.Qanswer2 = cellAnswer2[index]
    saveObject(newQ)
}