在 AngularJS ui-select multiple 中，我可以給它添加一個限制，或者創建一個警報。但我不能兩者都做。如果我顯示警報，則不會從 UI 中清除之前選擇的選項。代碼筆： https ://codepen.io/pragatij55/pen/mdpzmqp
我知道我可以使用 limit="2"，但我也想要一個警報。
<div ng-app="demo" class="ng-cloak" ng-controller="DemoCtrl">
<ui-select multiple ng-model="myModel" theme="bootstrap" ng-disabled="disabled" close-on-select="false" style="width: 800px;" on-select="changed(myModel)" title="Choose a person">
<ui-select-match placeholder="Select person...">{{$item.name}}</ui-select-match>
<ui-select-choices repeat="person.name as person in people | propsFilter: {name: $select.search, type: $select.search}">
<div ng-bind-html="person.name | highlight: $select.search"></div>
<small>
type: <span ng-bind-html="'' person.type | highlight: $select.search"></span>
</small>
</ui-select-choices>
</ui-select>
</div>
JS：
app.controller('DemoCtrl', function ($scope, $http, $timeout, $interval) {
$scope.people = [
{ name: 'var1', type: 'header' },
{ name: 'var2', type: 'site' },
{ name: 'var3', type:'header' },
{ name: 'var4', type:'header' }
];
$scope.changed = function(val) {
if(val && val.length > 2) {
$scope.myModel = $scope.prevModel;
alert("Upto 2 variables can be selected")
} else {
$scope.prevModel = val;
}
}
});
uj5u.com熱心網友回復：
不確定這是否是您想要的，但您可以在此處使用Array.pop()洗掉警報之前的第 3 項：
$scope.changed = function(val) {
if(val && val.length > 2) {
val.pop();
在背景關系中：
app.controller('DemoCtrl', function ($scope, $http, $timeout, $interval) {
$scope.people = [
{ name: 'var1', type: 'header' },
{ name: 'var2', type: 'site' },
{ name: 'var3', type:'header' },
{ name: 'var4', type:'header' }
];
$scope.changed = function(val) {
if(val && val.length > 2) {
val.pop(); // <- add this line
$scope.myModel = $scope.prevModel;
alert("Upto 2 variables can be selected")
} else {
$scope.prevModel = val;
}
}
});
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