ember.js – 将Flow JS与Ember JS集成 – 数据未绑定

2023年1月25日 253次阅读

我正在尝试将
FlowJS与EmberJS集成.我成功地将数据上传到服务器,因此,我很擅长这一部分.

当尝试将流对象数据与emberJS组件绑定以通过把手显示数据时,我不成功.由于某种原因,数据绑定无效.

这是代码的一个例子.

HTML

<script type="text/x-handlebars" data-template-name="index">
    {{flow-uploader}}
</script>

<script type="text/x-handlebars" id="components/flow-uploader">
    <div class="drop"></div>
    <!-- file list -->
    {{#each file in flow.files}}
        <p>File name: {{file.name}}</p>
    {{/each}}
</script>

JS

App = Ember.Application.create({
    rootElement: '#main'
});


App.FlowUploaderComponent = Ember.Component.extend({

        flow: function(){
            return new Flow({
                target: 'http://google.com',
                testChunks: false
            });
        }.property(),

        initDropZone: function(){

            var flow = this.get('flow');
            var drop = this.$('.drop')[0];
            var $this = this;

            flow.assignDrop(drop);

            /*flow.on('fileAdded', function(file, flow){

            });
            flow.on('filesAdded', function(files){
            });
            flow.on('fileSuccess', function(file,message){
                console.log('file success');
            });
            flow.on('fileError', function(flow, message, chunk){
                console.log('file error');
            });*/
            flow.on('filesSubmitted', function(){
                console.log($this.get('flow').files);
                //flow.upload();
            });

            /*flow.on('complete', function(event, flow){
                console.log('completed');
            });

            flow.on('uploadStart', function(event, flow){
                console.log('uploading..');
            });
            flow.on('fileProgress', function(flow, file){

            });*/

        }.on('didInsertElement')

    });

例子可以在http://jsfiddle.net/sisir/qLuobq48/2/现场观看

基本上我在这里做的是将流对象保存为组件属性. flow对象的files属性是要上传的文件数组.一旦我们拖放或选择多个文件上传文件阵列就会更新.我们可以在控制台上看到它.日志代码通过filesSubmitted事件添加.

从句柄表达式中,每个文件都从文件队列中迭代.最初它是空的但后来当它被填充时它不会显示在html上.数据绑定由于某种原因不起作用.

最佳答案 在您的组件逻辑中：

App.FlowUploaderComponent = Ember.Component.extend({

    flow: function(){
        return new Flow({
            target: 'http://google.com',
            testChunks: false
        });
    }.property(),

    initDropZone: function(){

        var $this = this;    

        var flow = this.get('flow');
        var drop = this.$('.drop')[0];

        flow.assignDrop(drop);

        flow.on('filesSubmitted', function(){

          //for setting a single property
          $this.set('flowFiles', flow.files);

          //for setting multiple properties
          // $this.setProperties({'flowFiles': flow.files, /* etc.. */});

        });


    }.on('didInsertElement')

});

在您的模板中：

<script type="text/x-handlebars" data-template-name="index">   
    {{flow-uploader}}
</script>

<script type="text/x-handlebars" id="components/flow-uploader">
     <div class="drop"></div>
    <!-- file list -->
    {{#each file in flowFiles}}
        File name: {{file.name}}
    {{/each}}
</script>

见JSBin Example

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