ngf-max-size $ digest()错误与angular.js中的ng-file-upload [英] ngf-max-size $digest() error with ng-file-upload in angular.js

问题描述

这是源代码.

<div class="thumbnail" ngf-accept="'image/*'" ngf-pattern="'*.jpg,*.jpeg,*.gif,*.png'" ngf-max-size="1MB">

矫正性HTML模板"下方.

Below the Derective Html Template.

angular.module('ptgui.imagebox',[
    'ngFileUpload'
  ])
  .directive('ptguiImagebox', ['$compile', function($compile) {
    return {
      templateUrl: 'scripts/libs/ptgui/ptgui-imagebox.html',
      restrict: 'E',
      require: 'ngModel',
      scope: {
        ngModel: "="
      },
      replace: true,
      link: function ($scope, element, attrs) {

        $scope.$watch('ngModel',function(newFile, oldFile){
          if (newFile) {
            $scope['ngModel'] = newFile;
          } else {
            $scope['ngModel'] = oldFile;
          }
        });

      }
    };
  }]);

指令下方.

当我上传图片超过max_size时，下面始终出现$ digest()错误.

When I upload image over max_size, $digest() error comes up consistently below.

在此处输入图片描述

我还有一个问题. 找到解决此问题的解决方案后，当有人上传图片超过max_size时，我会发出警报消息.

and I have one more question. after I find solution that resolve this issue, I will make alert message when someone upload image over max_size.

谢谢您的回答.

推荐答案

您不应在watch内部更改模型，因为它会创建循环.如果您只需要在文件上传时提醒大小是否超过上限，就可以查看状态.

You shouldn't change your model inside watch since it creates a loop. If you just need to alert when a file is uploaded whether the size is above you can just check the status.

假设您输入以下内容:

 <input type="file" ngf-select ng-model="picFile" name="file"    
         accept="image/*" ngf-max-size="1MB" required
         ngf-model-invalid="errorFile">

然后，您只需要在html中显示它，即可显示超出限制大小的警报:

Then you just need to have this in your html to show the limit size exceeded alert:

<i ng-show="myForm.file.$error.maxSize">File too large 
      {{errorFile.size / 1000000|number:1}}MB: max 1M</i>

而且您也不需要指令来处理它.

And also you don't need a directive to handle that.

在此处中查看有关验证的更多信息.

Check here for more info around validation.

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