有没有办法让$broadcast在初始化阶段将变量传播到$on？
<div ng-app='test'>
<div ng-controller='testCtrl'> <span>{{testContent}}</span>
</div>
<div ng-controller="testCtrl2">
<input type='text' ng-change="updateContent()" ng-model="testContent2" />
</div>
</div>
var app = angular.module('test',[]);
app.factory('sharedContent',function ($rootScope) {
var standardContent;
var resizeProportion;
return {
setStandardContent: function (newStandardContent) {
standardContent = newStandardContent;
$rootScope.$broadcast('updateContent');
console.log('broadcast');
},getStandardContent: function () {
return standardContent;
},setResizeProportion: function (newResizeProportion) {
$rootScope.$broadcast('updateResizeProportion');
},}
});
app.run(function (sharedContent) {
sharedContent.setStandardContent('haha');
});
function testCtrl($scope,sharedContent) {
$scope.testContent;
$scope.$on('updateContent',function () {
console.log('receive');
$scope.testContent = sharedContent.getStandardContent();
});
}
function testCtrl2($scope,sharedContent) {
$scope.testContent2 = 'test';
$scope.updateContent = function () {
sharedContent.setStandardContent($scope.testContent2);
};
}
示例小提琴：http://jsfiddle.net/jiaming/NsVPe/
当输入发生变化时,跨度将显示该值,这是由于ng-change功能引起的.
但是,在初始化阶段,值“haha”未传播到$scope.testContent,因此在第一个运行时未显示任何内容.有没有办法让值“haha”出现在第一个运行时？
谢谢.
只需使用$timeout函数提供一点延迟.只需更新工厂中的代码即可开始工作.
原文链接：https://www.f2er.com/angularjs/141968.html请参考以下代码了解工厂：
app.factory('sharedContent',function ($rootScope,$timeout) {
var standardContent;
var resizeProportion;
return {
setStandardContent: function (newStandardContent) {
standardContent = newStandardContent;
$timeout(function(){
$rootScope.$broadcast('updateContent');
},0)
console.log('broadcast');
},}
});
