我试图在点击“声明点数”按钮时从一个指令(声明点)广播到另一个指令(横幅点)。
<button name="button" claim-points>Claim Points</button>
我想隐藏这个“横幅按钮”元素,直到广告从claim-points指令发送到banner-points指令:
<div name="bannerBtn" banner-points ng-if="isVisible">html from banner-points directive displayed here</div>
因此,在“声明点数”按钮上单击,它会获取并循环显示某些数据...如果找到匹配项,则会广播到showbanner
:
angular
.module('myApp')
.directive('claimPoints', ['$rootScope', '$http', function ($rootScope, $http) {
return {
restrict: 'AE',
link: function (scope, elem, attr) {
elem.bind('click', function() {
$http.get('/testJSON/points.json').success(function(data) {
var found = false;
angular.forEach(data.data, function(v, k) {
if (!found) {
if (v.award_name === attr.award) {
found = true;
$rootScope.$broadcast('showbanner', v.points);
}
}
}
);
});
});
}
};
}
]);
广播应该发送到按钮上的scope.$on('showbanner
,... here and set the "Banner Button" attribute
isVisible to true... which should trigger the
ng-if`。
angular
.module('myApp')
.directive('bannerPoints', function () {
return {
restrict: '',
templateUrl: '<div>some html I want to display',
link: function (scope, elem, attr) {
attr.isVisible = false;
scope.$on('showbanner', function(e, b) {
attr.isVisible = true;
});
}
};
});
广播没有发生。
答案 0 :(得分:1)
没有必要创建具有bannerPoints
侦听器的$on
,因为您的指令不是创建隔离范围,您只需要将isVisible
范围变量名称传递给{{1然后指令而不是广播你可以直接使用范围[attrs.isVisible]&amp;将其设为真,这样claimPoints
就会得到满足,并且该按钮会显示出来。
<强>标记强>
ng-if="isVisible"
<强>指令强>
<button name="button" claim-points is-visible="isVisible">Claim Points</button>
<button name="bannerBtn" ng-if="isVisible">
<div>some html I want to display></div>
</button>