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，可以在ng-change（）的帮助下触发。但是由于某些原因，这仅适用于初始化。 出于某种原因，我无法理解为什么ng-repeat只会在ng-repeat中触发一次。请参阅下面的代码。任何帮助将不胜感激。
***我应该提到当我放置一个＆＃34;调试器＆＃34;在我的函数调用，changedTemperatureTo中，它触发＆＃34;调试器＆＃34;当我从F-> C转换，但＆＃34;调试器＆＃34;第二轮甚至不会从C-> F触发。第二次，我的意思是我第一次从F-＆gt; C翻转单选按钮。当我将其翻转时，没有任何反应 - 调试器不会触发。
查看：
{{日期}}
<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>
控制器：
/ * global angular * /
var weatherControllers = (function () {
var weatherControllers = angular.module('weatherControllers', []);
// Declare the application controller and inject the scope reference.
weatherControllers.controller('AppCtrl', ['$scope', function ($scope) {
// Define the title model.
$scope.title = "AngularJS Tutorial - Yahoo Weather App";
}]);
// Inject the scope and new weatherService reference into the controller.
weatherControllers.controller('ListCtrl', ['$scope', 'weatherService', function ($scope, weatherService) {
// Define the forecast data.
}]);
// Inject the scope and new weatherService reference into the controller.
weatherControllers.controller('WeatherCtrl', ['$scope', 'weatherService',
function ($scope, weatherService) {
// Define the forecast data.
// forcastOne >
weatherService.getWeather('Vancouver').success(function (data) {
$scope.forecastVan = weatherService.getForecastFromData(data);
console.log("forecastVan");
console.log($scope.forecastVan);
// console.log($scope.forecastVan[0]);
// console.log("$scope.forecastVan[0]['date']");
// console.log($scope.forecastVan[0]['date']);
$scope.forecastDate = $scope.forecastVan[0]['date'];
weatherService.getWeather('Honolulu').success(function (data) {
$scope.forecastHon = weatherService.getForecastFromData(data);
console.log("forecastHon");
console.log($scope.forecastHon);
console.log($scope.forecastHon[0]);
weatherService.getWeather('San Diego').success(function (data) {
$scope.forecastSan = weatherService.getForecastFromData(data);
console.log("forecastSan");
console.log($scope.forecastSan);
console.log($scope.forecastSan[0]);
weatherService.getWeather('Havana Cuba').success(function (data) {
$scope.forecastHav = weatherService.getForecastFromData(data);
console.log("forecastHav");
console.log($scope.forecastHav);
console.log($scope.forecastHav[0]);
// Create index model
$scope.forecastAll = [$scope.forecastVan[0], $scope.forecastHon[0], $scope.forecastSan[0], $scope.forecastHav[0]]
});
});
});
});
$scope.cityNameForForecast = function (forecast) {
if ($scope.forecastVan[0] == forecast) {
return 'Vancouver';
}
else if ($scope.forecastHon[0] == forecast) {
return 'Honolulu';
}
else if ($scope.forecastSan[0] == forecast) {
return 'San Diego';
}
else if ($scope.forecastHav[0] == forecast) {
return 'Havana Cuba';
}
};
// Temperature
$scope.temperatureNames = ['C', 'F'];
$scope.selectedTemperatureName = $scope.temperatureNames[1];
$scope.changedTemperatureTo = function (temperatureName) {
// debugger;
if (temperatureName == 'C') {
$scope.forecastAll = weatherService.arrayToCelsius($scope.forecastAll);
}
else if (temperatureName == 'F') {
$scope.forecastAll;
}
};
}]);
// Inject scope, $routeParams, and cardService
weatherControllers.controller('DetailCtrl', ['$scope', '$routeParams', 'weatherService',
function ($scope, $routeParams, weatherService) {
weatherService.getWeather($scope, $routeParams.cityID);
$scope.cityName = $routeParams.cityName;
weatherService.getWeather($routeParams.cityName).success(function (data) {
$scope.forecast = weatherService.getForecastFromData(data);
});
$scope.temperatureNames = ['C', 'F'];
$scope.selectedTemperatureName = $scope.temperatureNames[1];
}]);
return weatherControllers;
}());
SERVICES：
weatherApp.factory("weatherService", function ($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.
}
}
});
答案 0 :(得分：1)
从我所看到的，你最初将温度设定为华氏温度。
// Temperature
$scope.temperatureNames = ['C', 'F'];
$scope.selectedTemperatureName = $scope.temperatureNames[1];
问题出现在这里：
$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;
}
};
temperatureName == 'F'时没有发生任何事情。所以它会从Farenheight转换为Celcius，但回来时没有任何反应。
希望这有帮助！