Angularjs 加载屏幕上的 ajax 请求 [英] Angularjs loading screen on ajax request

问题描述

使用 Angularjs，我需要显示加载屏幕(一个简单的微调器)，直到 ajax 请求完成.请用代码片段提出任何想法.

解决方案

与其设置作用域变量来指示数据加载状态，不如让一个指令为您做所有事情:

angular.module('directive.loading', []).directive('loading', ['$http' ,function ($http){返回 {限制:'A'，链接:函数(范围、榆树、属性){scope.isLoading = 函数 () {返回 $http.pendingRequests.length >0;};scope.$watch(scope.isLoading, 函数 (v){如果(v){榆树.show();}别的{榆树.隐藏()；}});}};}]);

有了这个指令，你需要做的就是给任何加载动画元素一个加载"属性:

<div class="loading-spiner-holder" 数据加载><div class="loading-spiner"><img src="..."/></div>

页面上可以有多个加载微调器.在哪里以及如何布置这些微调器取决于您，指令会自动为您打开/关闭它.

Using Angularjs , I need to show a loading screen (a simple spinner) until ajax request is complete. Please suggest any idea with a code snippet.

解决方案

Instead of setting up a scope variable to indicate data loading status, it is better to have a directive does everything for you:

angular.module('directive.loading', [])

    .directive('loading',   ['$http' ,function ($http)
    {
        return {
            restrict: 'A',
            link: function (scope, elm, attrs)
            {
                scope.isLoading = function () {
                    return $http.pendingRequests.length > 0;
                };

                scope.$watch(scope.isLoading, function (v)
                {
                    if(v){
                        elm.show();
                    }else{
                        elm.hide();
                    }
                });
            }
        };

    }]);

With this directive, all you need to do is to give any loading animation element an 'loading' attribute:

<div class="loading-spiner-holder" data-loading ><div class="loading-spiner"><img src="..." /></div></div>

You can have multiple loading spinners on the page. where and how to layout those spinners is up to you and directive will simply turn it on/off for you automatically.

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