向中继器提供对象数组

Question

我已经编写了一个解析JSON文件并将代码保存在对象结构数组中的代码，如下所示：

        /*DataModel.qml*/
        Item {
           id: dataModel

           property var forecastData: []

           function updateForecastFromJson(parsedJSONData) {
              var index = 0
              for(;index < 5; ++index) {
                var temp = {
                   'temp_min': parsedJSONData.list[index].main.temp_min,
                   'temp_max': parsedJSONData.list[index].main.temp_max,
                   'weatherIconUrl': parsedJSONData.list[index].main.url,
                   'weatherCondition': parsedJSONData.list[index].main.condition,
                   'time': parsedJSONData.list[index].main.time
              }

              dataModel.forecastData.push(temp)
           }
        }

DataModel.qml 是一个singlton，我在如下所示的转发器中使用它来显示数据：

/*main.qml*/ 
Window { 
Grid {
   id: bottomGrid  
   Repeater {
       model: [
         { day: DataModel.forecastData[0].time, high: 
           DataModel.forecastData[0].temp_max, low: 
           DataModel.forecastData[0].temp_min, sourceIcon: 
           DataModel.forecastData[0].weatherIconUrl },
         { day: DataModel.forecastData[1].time, high: 
           DataModel.forecastData[1].temp_max, low: 
           DataModel.forecastData[1].temp_min, sourceIcon: 
           DataModel.forecastData[1].weatherIconUrl },
         { day: DataModel.forecastData[2].time, high: 
           DataModel.forecastData[2].temp_max, low: 
           DataModel.forecastData[2].temp_min, sourceIcon: 
           DataModel.forecastData[2].weatherIconUrl },
         { day: DataModel.forecastData[3].time, high: 
           DataModel.forecastData[3].temp_max, low: 
           DataModel.forecastData[3].temp_min, sourceIcon: 
           DataModel.forecastData[3].weatherIconUrl },
         { day: DataModel.forecastData[4].time, high: 
           DataModel.forecastData[4].temp_max, low: 
           DataModel.forecastData[4].temp_min, sourceIcon: 
           DataModel.forecastData[4].weatherIconUrl }
      ]

      Column {
         width: bottomGrid.width / 5
         spacing: dp(5)

         Image {
            source: modelData.sourceIcon
            anchors.horizontalCenter: parent.horizontalCenter
            sourceSize: dp(20)
         }

         Item {
            width: 1
            height: dp(5)
         }

         AppText {
            text: modelData.high
            anchors.horizontalCenter: parent.horizontalCenter
            font.pixelSize: sp(14)
        }

        AppText {
           text: modelData.low
           color: "#aaffffff"
           anchors.horizontalCenter: parent.horizontalCenter
           font.pixelSize: sp(14)
        }

        Item {
           width: 1
           height: dp(5)
        }

        AppText {
          text: modelData.day
          anchors.horizontalCenter: parent.horizontalCenter
          font.pixelSize: sp(14)
        }
     }
  }
}

但是，当中继器即将显示一系列数据时， 什么都不会显示，我的输出如下：

  

TypeError：无法读取未定义的属性“时间”

我检查了几次数据是否正确解析，并且确定将数据正确存储在对象数组中。我哪里出问题了？