Javascript ng更改仅在ng重复内触发一次--角度

我正在连接雅虎天气服务API，并使用Angular制作了一个简单的天气应用程序。我还创建了一个F-C温度转换器，在ng变化的帮助下触发。但是，由于某些原因，这只在初始化时起作用一次。 出于某种原因，我无法理解为什么ng repeat在ng repeat内只发射一次。请参阅下面的代码。任何帮助都将不胜感激

***我应该提到，当我在名为changedTemperatureTo的函数中放置一个调试器时，当我从F->C转换时，它会触发调试器，但第二次调试器甚至不会从C->F触发。第二次，我的意思是在我第一次从F->C点击单选按钮之后。当我将其反向翻转时，不会发生任何事情-调试器不会触发

视图：

{{date}}

<span ng-repeat="temp in temperatureNames">
  <input type="radio" name="selectedTemperatureNamed" ng-model="selectedTemperatureName" ng-value="temp" ng-change="changedTemperatureTo(temp)"/> {{temp}}
</span>

<select ng-model="sort">
  <option value="cityNameForForecast(td)">City</option>
  <option value="high">High</option>
  <option value="low">Low</option>
</select>
<input type="checkbox" ng-model="reverse"/> <small>*Check to Reverse Order</small>


<div ><br>
    <table class="tg">
        <thead>
           <tr >
                <th class="tg-031e"></th>
                <th class="tg-031e"></th>
                <th class="tg-031e"></th>
                <th class="tg-031e">High</th>
                <th class="tg-031e">Low</th>
            </tr>
        </thead>
        <tbody>
            <tr ng-repeat="td in forecastAll | orderBy:sort:reverse">
                <th class="tg-031e"><a href="#/weather/city/{{cityNameForForecast(td)}}">{{cityNameForForecast(td)}}</a></th>
                <th class="tg-031e"><img src="http://l.yimg.com/a/i/us/we/52/{{ td.code }}.gif"></th>
                <th class="tg-031e">{{td.text}}</th>
                <th class="tg-031e">{{td.high}}</th>
                <th class="tg-031e">{{td.low}}</th>
            </tr>
        </tbody>
    </table>

</div>

服务：

weatherApp.factory("weatherService", function ($http) {
    'use strict';
    return {
        doSomething: function ($scope) {
        },
        getWeather: function (city) {
            var url = this.getUrlForCity(city);
            return $http.get(url);
        },
        getUrlForCity: function (city) {
            // Weather codes:
            var weatherCodes = {'Vancouver': 'CAXX0518', 'Honolulu': 'USHI0026', 'San Diego': 'USCA0982', 'Havana Cuba': 'CUXX0003'}

            var city     = weatherCodes[city] // Now on can call all cities at once
            var yahooAPI = "'http://weather.yahooapis.com/forecastrss?p=";
            var format   = "'&format=json&diagnostics=true&callback=";
            var yql      = "http://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20rss%20where%20url%3D";
            var url      = yql + yahooAPI+ city + format;
            return url;
        },

        getForecastFromData: function (data) {
            try {

                var stringified = JSON.stringify(data);          // Convert to a string.
                stringified = stringified.split("\\n").join(""); // Remove new line '/n'.
                var listing = JSON.parse(stringified);           // Convert to object.
                var forecast = [];                               // Store 5 day forecast.
                var forecastDate = [];                           // Stores forecast date
                for (var result in listing) {
                    for (var item in listing[result].results) {
                        for (var day in listing[result].results.item.forecast) {
                            forecast.push(listing[result].results.item.forecast[day]);
                        }
                    }
                }
            }
            catch (error) {
                alert("Weather reading error:" + error.name + ": "
                    + error.message);
            }
            return forecast;
        },

        arrayToCelsius: function (forecastArray) {
            for (var i = 0; i < forecastArray.length; i++) {
                forecastArray[i]['high'] = this.getCelsius(forecastArray[i]['high']);
                forecastArray[i]['low'] = this.getCelsius(forecastArray[i]['low']);
            }

            return forecastArray;
        },

        getCelsius: function (fahrenheit) {
            var fTempVal = this.getForecastFromData(fahrenheit);
              // debugger;
            // $scope.celsius = this.getForecastFromData;
            var celsius = ((fahrenheit - 32) * 0.56).toFixed(0);
            return celsius; // Calculation goes here.
        }
    }
});

---

从我所看到的，你最初设定的温度是华氏度

// Temperature
$scope.temperatureNames = ['C', 'F'];
$scope.selectedTemperatureName = $scope.temperatureNames[1]; 

问题发生在这里：

$scope.changedTemperatureTo = function(temperatureName) {
  // debugger;
  if (temperatureName == 'C') {
    $scope.forecastAll = weatherService.arrayToCelsius($scope.forecastAll);
  } else if (temperatureName == 'F') {
    /*
      You aren't doing anything to the forcastAll variable when the temperature
      is F
    */
    $scope.forecastAll;
  }
};

当temperatureName=='F'时，不会发生任何事情。所以它会从法伦海特转换成塞尔修斯，但回去时什么也不会发生

---

希望这有帮助

Tnx。好电话！我应该提到，当我在名为changedTemperatureTo的函数中放置一个调试器时，当我从F->C转换时，它会触发调试器，但第二次调试器甚至不会从C->F触发。第二次，我的意思是在我第一次从F->C打开收音机btn后。当我将其反向翻转时，不会发生任何事情-调试器不会触发。

$scope.changedTemperatureTo = function(temperatureName) {
  // debugger;
  if (temperatureName == 'C') {
    $scope.forecastAll = weatherService.arrayToCelsius($scope.forecastAll);
  } else if (temperatureName == 'F') {
    /*
      You aren't doing anything to the forcastAll variable when the temperature
      is F
    */
    $scope.forecastAll;
  }
};