Question

我的html页面中有一个画布。默认情况下，当画布在html页面上加载时，我试图从我的angularjs控制器调用一个函数。我可以通过使用window.onload函数来实现。但是我无法通过这种方式传递任何参数。我尝试了ng-init。但是我遇到了错误。如果我尝试ng-mouseover则可以工作，如果我将鼠标放在画布上。但是我想在没有用户交互的情况下调用该函数，只需重新加载页面即可。我是angularjs的新手。有什么办法可以做到吗？谢谢。

HTML部分

<body >

    <div ng-app="demo" ng-controller="testCtrl"  >

      <div class="flex-control-nav" >
        <div>
          <canvas ng-style="mybody" id="myCanvas" ng-init=init('myCanvas')  style="border:1px solid #d3d3d3;">
          Your browser does not support the HTML5 canvas tag.

          </canvas>
      </div>
     </div>
</div>

angularjs部分

var app = angular.module("demo", []);
        app.controller("testCtrl", function($scope,$http,$window) {
           $scope.temp = "";
           $scope.rows = []; // init empty array
           $scope.datainput =[];
           $scope.dataconfig =[];

            $http({
                method: 'GET',
                url: 'http://localhost:5000/database'
            }).then(function (data){
            },function (error){
            console.log("big error");
            });



            $http({
                method: 'GET',
                url: 'Data/input.json'
            }).then(function (data){
            $scope.datainput=data.data;
            console.log($scope.datainput);
            },function (error){
            console.log("big err");
            });


            $http({
                method: 'GET',
                url: 'Data/config.json'
            }).then(function (config){
            $scope.dataconfig=config.data;
            //console.log($scope.datainput);
            },function (error){
            console.log("config error");
            });






            $scope.refresh = function(){
                location.reload();


            }


            $scope.init = function(canvasid) {
               var json=JSON.parse(JSON.stringify($scope.datainput));

               var jsonconfig=JSON.parse(JSON.stringify($scope.dataconfig));
                var n = $scope.givenNumber;

                var cheight=jsonconfig[3].value;
                var cwidth=jsonconfig[4].value;

                $scope.rows = [];
                var newx;
                var newy;

                for(var k=0;k<=1;k++){
                var c =document.getElementById(canvasid);
                    c.width=cwidth;
                    c.height=cheight;

这是我使用ng-init时的错误

“ angular.min.js：127 TypeError：无法读取b。$ scope.init处未定义的属性'value'

Answer 1

也许我可以解决。看来解决了我的问题。这是代码。角部

$scope.myrunner =function(canvasid){

    var flag=0;
    $http({
         method: 'GET',
         url: 'http://localhost:5000/database'
    }).then(function (data){
    },function (error){
         console.log("big error");
    });
    $http({
        method: 'GET',
        url: 'Data/input.json'
    }).then(function (data){
        $scope.datainput=data.data;
        console.log($scope.datainput);
    },function (error){
        console.log("big err");
    });

    $http({
        method: 'GET',
        url: 'Data/config.json'
    }).then(function (config){
        $scope.dataconfig=config.data;
        $scope.init(canvasid);//this is the previous function 
        console.log($scope.datainput);
    },function (error){
        console.log("config error");
    });         
}

$scope.refresh = function(){
    location.reload();              
}

$scope.init = function(canvasid) {
    var json=JSON.parse(JSON.stringify($scope.datainput));
    var jsonconfig=JSON.parse(JSON.stringify($scope.dataconfig));

HTML部分

<div>

      <canvas ng-style="mybody" id="myCanvas" ng-init=myrunner('myCanvas')  style="border:1px solid #d3d3d3;">
      Your browser does not support the HTML5 canvas tag.

      </canvas>
  </div>
  <div>
    <canvas ng-style="mybody" id="myCanvas2" ng-init=myrunner('myCanvas2') style="border:1px solid #d3d3d3;">
    Your browser does not support the HTML5 canvas tag.

    </canvas>
</div>

无法使用ng-init调用angularjs函数

1 个答案: