Angularjs 指令未使用ControllerA和bindToController使用异步数据更新视图
我在获取更新视图的指令时遇到了一些问题 在我的控制器中,我为Angularjs 指令未使用ControllerA和bindToController使用异步数据更新视图,angularjs,asynchronous,controller,directive,Angularjs,Asynchronous,Controller,Directive,我在获取更新视图的指令时遇到了一些问题 在我的控制器中,我为指令的属性设置初始值。然后,2秒钟后,我将更新vm.listObjectSelected,以测试其异步行为 但是,该视图没有反映更新 控制器: var listObject = [{"display":"display1", "value":"value1"}, {"display":"display2", "value":"value2"}, {"display":"display3", "value":"value3"}]
指令的属性设置初始值。然后,2秒钟后,我将更新vm.listObjectSelected
,以测试其异步行为
但是,该视图没有反映更新
控制器:
var listObject = [{"display":"display1", "value":"value1"}, {"display":"display2", "value":"value2"}, {"display":"display3", "value":"value3"}]
vm.listObject = listObject
vm.listObjectSelected = [{"display":"display1", "value":"value1"}]
$timeout(function(){
vm.listObjectSelected = [{"display":"display1", "value":"value1"}, {"display":"display3", "value":"value3"}]
}, 2000)
HTML
<tiki-list max="" type="multi" list="editController.listObject" selected="editController.listObjectSelected"></tiki-list>
指令
(function(){
'use strict';
angular.module("tiki").directive("tikiList", tikiList)
function tikiList(helper){
var directive = {
restrict:"EA",
scope:{
list: "=", //the object to repeat over, this contains 2 array's
retunObject: "=", //the array that is outputted
selected: "=", //preselected values
max: "=", //maximum range, other elements are greyed out, starts at 0
title:"@title", //the title of this list
type:"@type", //[single, multi]
},
templateUrl:"js/directive/list.html",
link:link,
bindToController: true,
controllerAs:"vm",
controller:controller
}
return directive
function link(scope, el, attr, ctrl){
scope.vm.onClick = onClick
// preprocess the "list" if there is a "selected" attribute
// the "selected" attribute is an object that contains the selected items
// return a "selectedItems" array containing the indeces of matching display names
// add the .active property to the "list" object to the correct indeces
if(scope.vm.selected){
var selectedItems = helper.isItemInList(helper.createArrayFromProperty(scope.vm.selected, "display"), helper.createArrayFromProperty(scope.vm.list, "display"))
for(var i = 0; i < selectedItems.length; i++){
scope.vm.list[selectedItems[i]].active = true
}
}
// add the property .disabled to the "list" if there is a max attribute
// the property will be added to all indeces that exceed the max value
if(scope.vm.max){
for(var y = 0; y < scope.vm.list.length; y++){
if(y >= scope.vm.max){
scope.vm.list[y].disabled = true
}
}
}
function onClick(index){
// only allow items that are in range of the "max" attribute are allowed to be clicked
if(!scope.vm.max || index < scope.vm.max){
if(scope.vm.type === "single"){
angular.forEach(scope.vm.list, function(val, key){
scope.vm.list[key].active = false
})
scope.vm.list[index].active = true
}
if(scope.vm.type === "multi"){
scope.vm.list[index].active = !scope.vm.list[index].active
}
}
}
scope.vm.listing = scope.vm.list
}
}
controller.$inject = [];
function controller(){
}
})()
<ul class="listOptions">
<li class="listOptions-title" ng-class="{'show':title}">{{vm.title}}</li>
<li ng-click="vm.onClick($index)" ng-class="{'active':list.active, 'disabled':list.disabled}" ng-repeat="list in vm.listing track by $index">{{list.display}}</li>
</ul>
(函数(){
"严格使用",;
角度模块(“tiki”)指令(“tikiList”,tikiList)
函数提示列表(帮助器){
var指令={
限制:“EA”,
范围:{
列表:“=”,//要重复的对象,它包含2个数组
retunObject:“=”,//输出的数组
选定:“=”,//预选值
max:“=”,//最大范围,其他元素灰显,从0开始
标题:“@title”,//此列表的标题
类型:“@type”、/[单个、多个]
},
templateUrl:“js/directive/list.html”,
链接:链接,
bindToController:对,
controllerAs:“虚拟机”,
控制器:控制器
}
返回指令
功能链接(范围、el、属性、ctrl){
scope.vm.onClick=onClick
//如果存在“选定”属性,则预处理“列表”
//“选定”属性是包含选定项的对象
//返回一个“selectedItems”数组,其中包含匹配显示名称的索引
//将.active属性添加到“list”对象的正确索引中
if(scope.vm.selected){
var selectedItems=helper.isItemInList(helper.createArrayFromProperty(scope.vm.selected,“显示”),helper.createArrayFromProperty(scope.vm.list,“显示”))
对于(变量i=0;i=scope.vm.max){
scope.vm.list[y].disabled=true
}
}
}
函数onClick(索引){
//只允许单击“最大”属性范围内的“允许”项
如果(!scope.vm.max | | index
指令模板
(function(){
'use strict';
angular.module("tiki").directive("tikiList", tikiList)
function tikiList(helper){
var directive = {
restrict:"EA",
scope:{
list: "=", //the object to repeat over, this contains 2 array's
retunObject: "=", //the array that is outputted
selected: "=", //preselected values
max: "=", //maximum range, other elements are greyed out, starts at 0
title:"@title", //the title of this list
type:"@type", //[single, multi]
},
templateUrl:"js/directive/list.html",
link:link,
bindToController: true,
controllerAs:"vm",
controller:controller
}
return directive
function link(scope, el, attr, ctrl){
scope.vm.onClick = onClick
// preprocess the "list" if there is a "selected" attribute
// the "selected" attribute is an object that contains the selected items
// return a "selectedItems" array containing the indeces of matching display names
// add the .active property to the "list" object to the correct indeces
if(scope.vm.selected){
var selectedItems = helper.isItemInList(helper.createArrayFromProperty(scope.vm.selected, "display"), helper.createArrayFromProperty(scope.vm.list, "display"))
for(var i = 0; i < selectedItems.length; i++){
scope.vm.list[selectedItems[i]].active = true
}
}
// add the property .disabled to the "list" if there is a max attribute
// the property will be added to all indeces that exceed the max value
if(scope.vm.max){
for(var y = 0; y < scope.vm.list.length; y++){
if(y >= scope.vm.max){
scope.vm.list[y].disabled = true
}
}
}
function onClick(index){
// only allow items that are in range of the "max" attribute are allowed to be clicked
if(!scope.vm.max || index < scope.vm.max){
if(scope.vm.type === "single"){
angular.forEach(scope.vm.list, function(val, key){
scope.vm.list[key].active = false
})
scope.vm.list[index].active = true
}
if(scope.vm.type === "multi"){
scope.vm.list[index].active = !scope.vm.list[index].active
}
}
}
scope.vm.listing = scope.vm.list
}
}
controller.$inject = [];
function controller(){
}
})()
<ul class="listOptions">
<li class="listOptions-title" ng-class="{'show':title}">{{vm.title}}</li>
<li ng-click="vm.onClick($index)" ng-class="{'active':list.active, 'disabled':list.disabled}" ng-repeat="list in vm.listing track by $index">{{list.display}}</li>
</ul>
- {{{vm.title}
- {{{list.display}
我想这和controllerAs有点关系,但我不知道该怎么办
thx,我认为原因是数组是引用类型。当您在服务或异步步骤中更改数据时,数据点会转到内存中的新位置,但指令或控制器中的数据不会更改 不要像这样编写函数:
$timeout(function(){
vm.listObjectSelected = [{"display":"display1", "value":"value1"}, {"display":"display3", "value":"value3"}]
}, 2000)
您应该尝试这样做:
$(timeout(function(){vm.listObjectSelected.push({you need data here})},200)
或者你可以使用一个承诺,你可以返回一个承诺并在指令中得到它,使用
promise.then(function(){//let data = service.data again}
希望这能对您有所帮助。为什么您总是使用
scope.vm
?如果您将controllerAs
与bindToController
一起使用,则可以直接访问此
对象上的隔离作用域属性,例如此.选定的
。使用指令定义的bindToController
属性,隔离作用域的所有属性将自动绑定到控制器,而不是作用域。没有必要使用scope.vm
。我之所以使用scope.vm,是因为我试图遵循以下样式指南:在$timeout
内执行的操作超出了角度摘要周期。您需要在vm.listObjectSelected=…
之后调用$scope.$digest()
内部$timout
,因为在指令scope.vm.listing
和scope.vm.list
中,当您将控制器listObject
设置为新数组时,将不会指向相同的引用。因此,尽管更新了scope.vm.list
,但您的scope.vm.listing
不会更新。只需将ng repeat
设置为使用scope.vm.list
而不是scope.vm.listing
,就可以了。我误解了您在控制器中选择的listObject
和listObject
。您应该使用$watch
来注意listObjectSelected
中的更改。