TypeError: $scope.scanBarcode is not a function in ionic

Question

我正在尝试在用户单击按钮时显示一条日志消息。但是却出现了这个错误：

TypeError: $scope.scanBarcode is not a function
at new <anonymous> (controllers.js:8)
at Object.instantiate (ionic.bundle.js:18015)
at $controller (ionic.bundle.js:23417)
at Object.self.appendViewElement (ionic.bundle.js:59908)
at Object.render (ionic.bundle.js:57901)
at Object.init (ionic.bundle.js:57821)
at Object.self.render (ionic.bundle.js:59767)
at Object.self.register (ionic.bundle.js:59725)
at updateView (ionic.bundle.js:65400)
at ionic.bundle.js:65377
(anonymous) @ ionic.bundle.js:26799

这是我的 controller.js 代码：

angular.module('app.controllers', [])
.controller('page4Ctrl', ['$scope', '$stateParams', function ($scope, $stateParams) {
$scope.scanBarcode() = function()
{
     console.log("hello");
};

}])

这是我的 html 代码：

<ion-view title="Page1" id="page18">
<ion-content padding="true" class="has-header">
<button id="page4-button4" class="button button-positive  button-block" ng-click="scanBarcode()">Scan</button>
<button id="page4-button5" class="button button-positive  button-block">Display Scanned Data</button>

可能是什么问题？

Answer 1

我认为你定义的函数有误。不要在函数名后使用 () scanBarcode

试试这个：

$scope.scanBarcode = function()//no () after the name
{
     console.log("hello");
};

TypeError: $scope.scanBarcode is not a function in ionic

TypeError: $scope.scanBarcode is not a function in ionic

angularjs

ionic-framework

ngcordova