$q.all() 的异步处理问题

 

一

html:

<div ng-app>
  <div ng-controller="PromiseCtrl">
      {{result}}
  </div>
</div>

js:

function PromiseCtrl($scope, $q, $timeout) {
    // Our promise function with its delay as argument
    var getPromise = function(delay) {
        // Creates a Deferred object
        var deferred = $q.defer();
                       
        $timeout(function() {
            // Resolve the promise at the end of the delay if said delay was > 0
            if(delay > 0) {
                deferred.resolve("Success");
            } else {
                deferred.reject("Fail");
            }
        }, delay);
        
        // The promise of the deferred task
        return deferred.promise;
    };
    
    // Init
    $scope.result = "Waiting";
    
    /*
     * Combines multiple promises into a single promise
     * that will be resolved when all of the input promises are resolved
     */
    $q.all([
            getPromise(1000),
            getPromise(2000),
            getPromise(3000) // <--- Try something less than 0
        ]).then(function(value) {
        // Success callback where value is an array containing the success values
        $scope.result = value;       
    }, function(reason) {
        // Error callback where reason is the value of the first rejected promise
        $scope.result = reason;
    });
}

输出：["Success","Success","Success"]

 

二

$scope.falseList = [];
angular.forEach($scope.uploadDataList, function(value,index){
    $scope.uploadData = value;
    $scope.uploadData.name = $scope.IPSUser.name;
    $scope.uploadData.part = inds;

    var requests = [];
    requests.push($http.post($scope.URL+"zhuanlistatus/addZhuanliStatus",$scope.uploadData));
    $q.all(requests).then(function(value) {
        console.log("value",value);
        // Success callback where value is an array containing the success values
        if(value[0].data.result){
            if(index == $scope.uploadDataList.length-1) {
                layer.alert("通知书添加成功",{time:2000});
                ngDialog.closeAll();
            }
        }else{
            $scope.falseList.push(value[0].config.data);
            ngDialog.closeAll();
            if(index == $scope.uploadDataList.length-1) {
                ngDialog.open({
                    template: 'html/maintain/falseListPage.html',
                    className: 'ngdialog-theme-plain',
                    width: '40%',
                    scope: $scope,
                    cache: false
                });
            }
        }
    }).catch(function(err) {
        // Error callback where reason is the value of the first rejected promise
        layer.alert(err);
    });
},$scope.falseList);

 

参考文章：

1、http://jsfiddle.net/jsengel/mc3p01nb/

2、https://blog.csdn.net/shidaping/article/details/52398925

3、https://www.cnblogs.com/angel1254/p/6603411.html