[英]angular $scope variable updated but not displayed
在下面的控制器中,$ scope.timer每秒鍾增加一次,但在視圖{{timer}}
中不反映其內容。
myapp.controller('TimeCtrl', ['$scope', function($scope){
$scope.timer = 0;
setInterval(function(){
$scope.timer = $scope.timer + 1;
console.log($scope.timer);
},1000);
}]);
我可以添加$scope.$apply();
來解決它 計時器更新后為什么? 為什么計時器不更新?
在這里提琴: http : //jsfiddle.net/wvxgzx76/1/
因為setInterval
在$digest
循環之外-而是使用Angulars $interval
指令:
myapp.controller('TimeCtrl', ['$scope', '$interval', function($scope, $interval){
$scope.timer = 0;
$interval(function(){
$scope.timer = $scope.timer + 1;
console.log($scope.timer);
},1000);
}]);
只需將您的代碼包裝到適用范圍內即可:
var myapp = angular.module('myapp', []);
myapp.controller('TimeCtrl', ['$scope', function($scope){
$scope.timer = 0;
setInterval(function(){
$scope.$apply(function () {
$scope.timer = $scope.timer + 1;
console.log($scope.timer);
});
},1000);
}]);
或使用$ interval代替setInterval(我更喜歡這樣):
var myapp = angular.module('myapp', []);
myapp.controller('TimeCtrl', ['$scope', '$interval', function($scope,$interval){
$scope.timer = 0;
$interval(function(){
$scope.timer = $scope.timer + 1;
console.log($scope.timer);
},1000);
}]);
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