我正在尝试从以编程方式插入的子组件调用方法。 这是我的代码。
MultipleFileUploader.vue
<template>
<div class="form-group" id="multiple-file-uploader">
<div>
<multiple-file-uploader-part
:name="uploadername" :index="1"
@remove="deleteUploader" @fileselected="fileSelected($event)">
</multiple-file-uploader-part>
</div>
</div>
</template>
<script>
import MultipleFileUploaderPart from './MultipleFileUploaderPart.vue';
let index_count = 1;
export default {
components: {
'multiple-file-uploader-part':MultipleFileUploaderPart,
},
props: {
uploadername: {
type: String,
default: 'files',
}
},
data() {
return {
next_id:1,
}
},
methods: {
fileSelected: function (target) {
var UploaderPart = Vue.extend(MultipleFileUploaderPart);
new UploaderPart().$on('fileselected','fileSelected')
.$mount('#multiple-file-uploader');
},
deleteUploader: function (idToRemove) {
this.uploaders = this.uploaders.filter(
uploaders_id => {
return uploaders_id.id !== idToRemove;
}
)
}
},
}
</script>
<style scoped>
</style>MultipleFileUploaderPart.vue
<template>
<div v-bind:id="name + '['+index+']'">
<div class="input-group margin">
{{index}}
<input type="file" accept="application/pdf,image/jpeg,image/png"
v-bind:name="name + '['+index+']'"
v-on:change="fileSelectedMethod($event.target)">
<div class="input-group-btn">
<button @click="removeClicked"
class="btn btn-danger btn-sm"
v-if="index != 1"
type="button">
Delete{{index}}
</button>
</div>
</div>
<p v-if="size_error" style="color: red">File size must be less than 2MB</p>
</div>
</template>
<script>
export default {
props: {
name: {
type: String,
},
index: {
type: Number,
},
},
data() {
return {
size: '',
size_error: false,
}
},
methods: {
removeClicked: function () {
document.getElementById(this.name+'[' + this.index + ']' ).remove();
this.$emit('remove', this.index);
},
fileSelectedMethod: function (target) {
this.size = target.files[0].size;
if (this.size < 2000000) {
this.size_error = false;
this.$emit('fileselected', target);
} else {
target.value = null;
this.size_error = true;
console.log(target.files);
}
}
}
}
</script>
<style scoped>我试图实现的是，当文件输入充满文件时，会创建一个MultipleFileUploaderPart。当填充此组件中的文件输入元素时，将插入另一个MultipleFileUploaderPart。
我想从新插入的组件调用MultipleFileUploader的fileSelected方法，以便我可以创建另一个组件。
我还想在单击删除按钮时删除MultipleFileUploaderPart组件。
我怎样才能做到这一点？或者有更好的方法吗？
编辑：这是我最初拥有的。 MultipleFileUploader.vue
<template>
<div class="form-group">
<div>
<multiple-file-uploader-part
v-for="uploader in uploaders"
:name="uploadername" :index="uploader.id"
@remove="deleteUploader" @fileselected="fileSelected($event)">
slot
</multiple-file-uploader-part>
</div>
</div>
</template>
<script>
import MultipleFileUploaderPart from "./MultipleFileUploaderPart";
let index_count = 1;
export default {
//name: "MultipleFileUploader",
components: {MultipleFileUploaderPart},
props: {
uploadername: {
type: String,
default: 'files',
}
},
data() {
return {
uploaders: [
{
id: index_count++,
},
]
}
},
methods: {
fileSelected: function (target) {
if(target.value){
this.uploaders.push({
id: index_count++,
})
}
},
deleteUploader: function (idToRemove) {
this.uploaders = this.uploaders.filter(
uploaders_id => {
return uploaders_id.id !== idToRemove;
}
)
}
},
}
</script>MultipleFileUploaderPart.vue
<template>
<div class="input-group margin">
{{index}}
<input type="file" accept="application/pdf,image/jpeg,image/png"
v-bind:name="name + '['+index+']'"
v-on:change="fileSelectedMethod($event.target)">
<div class="input-group-btn">
<button @click="$emit('remove',index)"
class="btn btn-danger btn-sm"
v-if="index != 1"
type="button">
Delete{{index}}
</button>
</div>
<br>
<p v-if="size_error" style="color: red">File size must be less than 2MB</p>
</div>
</template>
<script>
export default {
props: {
name: {
type: String,
},
index: {
type: Number,
},
},
data() {
return {
size: '',
size_error: false,
}
},
methods: {
checkFileSize: function () {
},
fileSelectedMethod: function (target) {
console.log(target);
console.log(target.files);
this.size = target.files[0].size;
console.log(this.size);
if (this.size < 2000000) {
this.size_error = false;
this.$emit('fileselected', target);
} else {
target.value = null;
this.size_error = true;
console.log(target.files);
}
}
}
}
</script>这发生了。请点击
当我单击"删除"按钮时，正确的子响应符被删除，但输入表单中的文件保留在那里。 这就是为什么我正在寻找另一种方法。
- 将上传器声明为一个对象数组，其中包含创建 MultipleFileUploaderPart 所需的所有 props。
- 在主多文件上传器中的多文件上传器上使用 v-for 以响应式生成多文件上传器部件组件
- 使用从 MultipleFileUploaderPart 到 MultipleFileUploader 的$emit来发出创建和删除事件，以便 MultipleFileUploader 可以在uploaders数组中添加或删除元素。
- 请不要直接从 DOM 中删除或创建元素，让 VueJs 来完成这项工作。