如何用函数改变ng-init值？

Question

这是我的Html和JavaScript代码，我想通过函数更改它。

Html ：

<div class="container" ng-app="myApp" ng-controller="myController">
  <h2>{{title}}</h2>
  <ul ng-init="initItems()">
    <li ng-repeat="item in items">
      <input ng-model="item.name" type="text"/>
      <div ng-if="makeVisible == item.id  && makeVisible !='' ">
        <input ng-model="newname" type="text"/>
        <button ng-click="hideme(item.id);  rename()" type="button">
          <span class="glyphicon glyphicon-ok">
          </span>
        </button>
        <button ng-click="hideme(item.id)" type="button">
          <span class="glyphicon glyphicon-remove">
          </span>
        </button>
      </div>
      <input ng-click=" showme( item.id)" type="button" value="Rename"/>
    </li>
  </ul>
</div>

JavaScript ：

function item(id, name) {
    this.id = id;
    this.name = name;
};

angular.module('myApp', []).controller('myController', function($scope) {
    $scope.items = [];
    $scope.makeVisible = "";
    $scope.initItems = function() {
        $scope.items.push(new item("0", 'Vikash'));
        $scope.items.push(new item("1", 'Kumar'));
        $scope.items.push(new item("2", 'Vishal'));
        $scope.items.push(new item("3", 'Ajay'));
    };
    $scope.renameThis = function(index, oldValue) {
        console.log("oldValue==" + oldValue);
        console.log("indexx==" + index);
        var id = 'box-' + index;
        console.log("Id : " + id);
        document.getElementById(id).style.display = "block";
        console.log('jai hind');
    };
    $scope.showme = function(id) {
        $scope.makeVisible = id;
        console.log('id', id);
    };
    $scope.hideme = function(id) {
        console.log(item);
        $scope.makeVisible = "";
    };
    $scope.title = 'Enter new name here';
    $scope.rename = function() {
        $scope.item.name = $scope.newname;
        console.log('dfasdd');
    };
});

这是ng-init值，它在输入框1中显示，我想在点击时用第二个输入框的值更改它。 我怎样才能做到这一点？ 我还在按钮上添加了一个功能。

Answer 1

在项目中添加可见的attr，

function item(id, name) {
    this.id = id;
    this.visible=false;
    this.name = name;
}

并将显示和隐藏功能更改为此代码

$scope.hideme = function(item) {
     item.visible=false;
};

$scope.showme = function(item) {
     item.visible=true;
};

并更改此代码

<div ng-if="makeVisible == item.id  && makeVisible !='' ">

至：

<div ng-if="item.visible">

并将项目对象发送到shomme和hideme函数

<input ng-click="showme(item)" type="button" value="Rename"/>


<button ng-click="hideme(item);  rename()" type="button">
    <span class="glyphicon glyphicon-ok">
    </span>
</button>
<button ng-click="hideme(item)" type="button">
    <span class="glyphicon glyphicon-remove">
    </span>
</button>

Answer 2

当您使用ng-if newname模型仅在项目处于重命名模式时可用。

所以，你可以这样做：

 function item(id, name) { this.id = id; this.name = name; }; angular .module('myApp', []) .controller('myController', function($scope) { $scope.items = []; $scope.makeVisible = ''; $scope.title = 'Enter new name here'; $scope.initItems = function() { $scope.items.push(new item('0', 'Vikash')); $scope.items.push(new item('1', 'Kumar')); $scope.items.push(new item('2', 'Vishal')); $scope.items.push(new item('3', 'Ajay')); }; $scope.showme = function(id) { $scope.makeVisible = id; }; $scope.hideme = function(id) { $scope.makeVisible = ''; }; $scope.rename = function(item, newname) { item.name = newname; }; }); 

 <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous"> <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script> <div class="container" ng-app="myApp" ng-controller="myController"> <h2>{{title}}</h2> <ul ng-init="initItems()"> <li ng-repeat="item in items"> <input ng-model="item.name" ng-disabled="true" type="text"/> <div ng-if="makeVisible === item.id && makeVisible !== ''"> <input ng-model="newname" type="text" /> <button ng-click="hideme(item.id); rename(item, newname);" type="button"> <span class="glyphicon glyphicon-ok"></span> </button> <button ng-click="hideme(item.id)" type="button"> <span class="glyphicon glyphicon-remove"></span> </button> </div> <input ng-if="makeVisible !== item.id" ng-click="showme(item.id)" type="button" value="Rename"/> </li> </ul> </div> 

Answer 3

据我所知，你想通过按键点击触发的函数rename （让我们说重命名按钮）改变第一个输入框（ item.name ）的值和第二个输入框（ newname ）的值。

解决方法是将item和newname传递给function。

简化的HTML：

<ul ng-init="initItems()">
    <li ng-repeat="item in items">
        <input ng-model="item.name" type="text" />
        <input ng-model="newname" type="text" />
        <input ng-click="rename(item, newname)" type="button" value="Rename" />
    </li>
</ul>

控制器：

$scope.rename = function(item, newname_) {
    item.name = newname_;
};

见工作http://jsfiddle.net/vp2r52pb/