AngularJS tabs with ng-repeat

问题:

I asked this question before and was wondering maybe somebody has had a similar problem and maybe know how to deal with it? My plnkr!

Angular tabs are not working with ng-repeat. It seems that Angular can't put together tab value from click and tab value from ng-show. My code:

<section ng-app="myApp">
<div ng-controller="myCtrl">
    <ul ng-init="tab=1">
        <li ng-repeat="item in data">
          <a href ng-click="tab = item.thingy">{{item.name}}</a>
        </li>
    </ul>
    <div ng-repeat="item in data" ng-show="tab === item.thingy">
        <img ng-src="{{item.img}}" width="50px"><br>
        {{item.year}}</div>
</div>
</section>

var app = angular.module('myApp', []);

app.controller('myCtrl', ['$scope', function($scope) {
  $scope.data = [{
    name: "First",
    title: "oneTitle",
    description: "Lorem ipsum dolor sit amet, consectetur adipiscing elit.",
    year: "2013",
    img: "http://static.hdw.eweb4.com/media/wp_400/1/5/42735.jpg",
    thingy: 1
  }, {
    name: "third",
    title: "twoTitle",
    description: "Quisque pulvinar libero sed eros ornare",
    year: "2014",
    img: "http://static.hdw.eweb4.com/media/wp_400/1/1/8519.jpg",
    thingy: 2
  }, {
    name: "Second",
    title: "threeTitle",
    description: "Cras accumsan massa vitae tortor vehicula .",
    year: "2015",
    img: "http://static.hdw.eweb4.com/media/wp_400/1/5/43326.jpg",
    thingy: 3
  }, {
    name: "fourth",
    title: "FourTitle",
    description: "Suspendisse vitae mattis magna.",
    year: "2011",
    img: "http://static.hdw.eweb4.com/media/wp_400/1/5/42413.jpg",
    thingy: 4
   }];
}]);

回答1:

There are multiple ways to approach this (one is dcodesmith's great answer).

Use Controller As syntax

If you wish to define view-only variables on your view (as you did in your example), use the Controller As syntax.

One of the pros you'll get using this approach is direct access to define and modify variables on the controller's scope. while in your case, the tab variable has been modified on the child scopes of ng-repeat / ng-init

---

html

<div ng-controller="myCtrl as vm">

    <ul ng-init="vm.tab=1">
        <li ng-repeat="item in vm.data">
          <a href ng-click="vm.tab = item.thingy">{{item.name}}</a>
        </li>
    </ul>

    <div ng-repeat="item in vm.data" ng-show="vm.tab === item.thingy">
        <img ng-src="{{item.img}}" width="50px"><br>
        {{item.year}}</div>
</div>

js

app.controller('myCtrl', ['$scope',
  function($scope) {
    var vm = this;

    vm.data = [{
       name: "First",
       title: "oneTitle",
       description: "Lorem ipsum dolor sit amet, consectetur adipiscing elit.",
       year: "2013",
       img: "http://static.hdw.eweb4.com/media/wp_400/1/5/42735.jpg",
       thingy: 1
     },
     //...
    ];

  }
]);

http://plnkr.co/edit/1q0AVrcqhIZRjFvVSVIP?p=preview

回答2:

Firstly, I think you should declare/initialise your $scope.tab in the controller, as well as the function to set the selected tab. Best practise IMO.

NOTE: Adopting this way of doing also helps testing easier.

HTML

    <ul>
        <li ng-repeat="item in data">
          <a href="#" ng-click="setTab(item.thingy)">{{item.name}}</a>
        </li>
    </ul>

JS

$scope.tab = 1;

// for the debugging reason. 
$scope.$watch('tab', function (newTab, oldTab) {
    console.log(newTab, oldTab);
});

$scope.setTab = function (pos) {
  $scope.tab = pos;
}

回答3:

modifications in script.js:

var app = angular.module('myApp', []);

app.controller('myCtrl', ['$scope', function ($scope) {
    $scope.data = [{
        name: "First",
        title: "oneTitle",
        description: "Lorem ipsum dolor sit amet, consectetur adipiscing elit.",
        year: "2013",
        img: "http://static.hdw.eweb4.com/media/wp_400/1/5/42735.jpg",
        thingy: 1
    }, {
        name: "third",
        title: "twoTitle",
        description: "Quisque pulvinar libero sed eros ornare",
        year: "2014",
        img: "http://static.hdw.eweb4.com/media/wp_400/1/1/8519.jpg",
        thingy: 2
    }, {
        name: "Second",
        title: "threeTitle",
        description: "Cras accumsan massa vitae tortor vehicula .",
        year: "2015",
        img: "http://static.hdw.eweb4.com/media/wp_400/1/5/43326.jpg",
        thingy: 3
    }, {
        name: "fourth",
        title: "FourTitle",
        description: "Suspendisse vitae mattis magna.",
        year: "2011",
        img: "http://static.hdw.eweb4.com/media/wp_400/1/5/42413.jpg",
        thingy: 4
    }];

  $scope.details = $scope.data[0];

  $scope.GetDetails = function(obj)
  {
    $scope.details = obj;
  }

}]
);

In HTML:

<div ng-controller="myCtrl">
        <ul ng-init="tab=1">
            <li ng-repeat="item in data">
              <a href ng-click="GetDetails(item);">{{item.name}}</a>
            </li>
        </ul>
        <div>
          {{details.thingy}} <br/>
          {{details.name}}<br/>
          {{details.title}}<br/>
          {{details.description}}<br/>
          {{details.year}}<br/>
          <img ng-src="{{details.img}}" width="50px"><br>
        </div>
</div>