[英]Angular - Cannot watch a factory variable
我一直試圖讓控制器的范圍識別工廠變量。
這是我的index.html
<div ng-controller='scoresController'>
<div id='game-info' ng-hide='!playing'>
<p id='level'>Level: {{ level }}
<span id='score'>Score: {{ score }}</span>
<span id='high-score'>High Score: {{ highScore() }}</span>
<span id='coins'>Coins: <span class='coins-badge'> {{ coins }} </span></span>
</p>
</div>
</div>
這是我的工廠
angular.module('my-app')
.factory('Game', function() {
return {
level: 1,
score: 0,
playing: false,
coins: localStorage['snakeCoins']
};
});
這是我的帶有$watch
功能的控制器
angular.module('my-app')
.controller('scoresController', ['$scope', 'Game', function($scope, Game) {
$scope.score = Game.score;
$scope.level = Game.level;
$scope.playing = false;
//$scope.coins = localStorage['snakeCoins'];
// Why aren't the changes being registered?
$scope.$watch(function() {
return Game.playing;
}, function(newVal, oldVal) {
$scope.playing = newVal;
}, true);
$scope.$watch(function() {
return Game.score;
}, function(newScore, oldScore) {
if (newScore > oldScore) {
console.log(newScore);
$scope.score = newScore;
}
});
$scope.$watch(function() {
return Game.level;
}, function(newLevel, oldLevel) {
if (newLevel > oldLevel) {
$scope.level = newLevel;
}
});
但是,我知道工廠變量正在改變,因為我正在將結果記錄到控制台
$scope.incrementScore = function() {
if (!playing) {
if (apple['x'] == snake[0].x && apple['y'] == snake[0].y) {
Game.score++;
console.log(Game.score); //Logging here
$scope.incrementLevel();
$scope.generateApples();
$scope.drawApple(apple['x'], apple['y']);
snake.push({ x: snake.length, y: 0 });
}
}
}
它不能是我包含文件的順序。
<script src='https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js'></script>
<script src='https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js'></script>
<script src='https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js'></script>
<script src='scripts/data.js'></script>
<script src='scripts/app.js'></script>
<script src='scripts/services/game.js'></script>
<script src='scripts/controllers/navController.js'></script>
<script src='scripts/controllers/achievementsController.js'></script>
<script src='scripts/controllers/scoresController.js'></script>
<script src='scripts/controllers/gamesController.js'></script>
不確定,為什么我不能注意到$watch
的變化。 任何理論?
你應該使用$rootScope.$watch
你可以通過將Game
分配到范圍來簡化這一點,即
.controller('scoresController', function($scope, Game) {
$scope.game = Game;
在你的模板中......
<span id="score">Score: {{ game.score }}</span>
這樣,您根本不需要設置任何手動監視器。
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