上传组件如何限制上传文件数量

[89trillion-feiyang]

zsbd

[lucky-wwww]

在parser中对上传组件添加before-upload进行数量限制

[txl945]

在parser中对上传组件添加before-upload进行数量限制
你好，请问我在render中注入了before-upload函数
if (this.conf.config.tag === 'el-upload') {
// 上传表单元素组件 的成功和移除事件;
dataObject.attrs['on-success'] = (response, file, fileList) => {
this.$emit('upload', response, file, fileList)
}
dataObject.attrs['on-remove'] = (file, fileList) => {
this.$emit('deleteUpload', file, fileList)
}
dataObject.attrs['on-preview'] = (file) => {
this.$emit('download', file)
}
dataObject.attrs['before-upload']=(file) =>{
this.$emit('beforeUpload',file)
}
return
}
Parser中也加入到了listener，但是没有触发是怎么回事呀
function buildListeners(scheme) {

const config = scheme.config
const methods = this.formConf.methods || {}
const listeners = {}

// 给__methods__中的方法绑定this和event
Object.keys(methods).forEach(key => {
listeners[key] = event => methods[key].call(this, event)
})
// 响应 render.js 中的 vModel $emit('input', val)
listeners.input = event => setValue.call(this, event, config, scheme)
listeners.upload = (response, file, fileList) => setUpload.call(this, config, scheme,response, file, fileList)
listeners.deleteUpload = (file, fileList) => deleteUpload.call(this, config, scheme,file, fileList)
listeners.download = (file) => download.call(this, file)
listeners.beforeUpload=(file) =>beforeUpload.call(this,file,scheme)
return listeners
}