Question

我有一个返回一些数据的Web服务。为了防止代码重复，我想将http请求调用移动到角度服务：

angular.module('abc', [])
    .factory('def', function () {
        return {
            getData: function () {
                return $http.post('/path/', {});
            }
        };
    });

一切都很好，但必要的数据在复杂的对象中，我每次都要写：

def.getData().then(function (response) {
    scope.obj = response.data.qwe.rty.xyz;
});

返回承诺的最简单方法是什么，它会将response.data.qwe.rty.xyz的值直接发送到successCallback？我可以这样写：

def.getData().then(function (obj) {
    scope.obj = obj;
});

Answer 1

致电$http.post('/path/', {})会返回一个承诺，然后您可以致电then()。请注意，then()也会返回一个承诺，因此您可以对调用进行链接。因此，您的代码可能如下所示：

angular.module('abc', [])
    .factory('def', function () {
        return {
            getData: function () {
                return $http.post('/path/', {})
                        .then(function(response) {
                            return response.data.qwe.rty.xyz;
                        });
            }
        };
    });

Answer 2

您可以使用Private Sub UserForm_Initialize() Dim RowMax As Integer Dim wsh As Worksheet Dim countExit As Integer Dim CellCombo1 As String Dim i As Integer Dim j As Integer Set wsh = ThisWorkbook.Sheets("Sheet2") RowMax = wsh.Cells(Rows.Count, "A").End(xlUp).Row 'find last row of sheet in column A ComboBox1.Clear 'clear all value of comboBox1 With ComboBox1 For i = 2 To RowMax 'Run each row of column A countExit = 0 CellCombo1 = wsh.Cells(i, "A").Value For j = i To 2 Step -1 'just show value not duplicate If CellCombo1 = wsh.Cells(j, "A").Value Then countExit = countExit + 1 End If Next j If countExit = 0 Then ElseIf countExit > 1 Then Else .AddItem CellCombo1 End If Next i End With End Sub Private Sub ComboBox1_Change() Dim RowMax As Integer Dim wsh As Worksheet Dim countExit As Integer Dim CellCombo2 As String Dim i As Integer Set wsh = ThisWorkbook.Sheets("Sheet2") RowMax = wsh.Cells(Rows.Count, "A").End(xlUp).Row 'find last row of sheet in column A ComboBox2.Clear 'clear all value of comboBox2 With ComboBox2 For i = 2 To RowMax If wsh.Cells(i, "A").Value = ComboBox1.Text Then 'Just show value of mapping with column A .AddItem wsh.Cells(i, "B").Value Else End If Next i End With End Sub提供程序

中实施的延迟行为像这样：

$q

并在您的控制器中使用它，如：

angular.module('abc', [])
.factory('def', function ($q) {

    return {
        getData: function () {
             var def = $q.defer
             $http.post('/path/', {}).then(function(response){
               def.resolve(response.data.qwe.rty.xyz)
             });
            return def.promise; 
        }
    };
});

用另一个值创建角度承诺

2 个答案: