本文主要说明在ionic3中使用ng2-file-upload插件,上传多种类型文件(图片、word、excel、ppt、mp4等)的使用方法。
1、html代码:
<button ion-button (click)="selectVideo()">添加</button> <input id="uploadPic" ng2FileSelect [uploader]="uploader" type="file" (change)="handleVideo($event)"/>
2、在页面module.ts文件中引入FileUploaderModule模块,如course.module.ts文件中:
import { FileUploadModule } from "ng2-file-upload";
@NgModule({
imports: [
FileUploadModule
],
declarations: [
AddCourse,
],
providers: [],
})
export class CourseModule {
}
3、添加文件大小及类型限制配置文件config.ts文件。
export const Conf = {
maxFileSize: 104587600,
allowedMimeType:['image/jpeg','image/png','application/msword',
'application/vnd.ms-excel','application/vnd.ms-powerpoint',
'audio/x-mpeg','video/mp4','audio/mpeg','audio/mp3',
'application/x-shockwave-flash','video/x-ms-asf',
'application/pdf',
'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
'application/vnd.openxmlformats-officedocument.presentationml.presentation'
],
}
3、在具体的ts文件中,使用方法,如:course.ts文件:import {FileUploader} from "ng2-file-upload";
// 引入loading、toast公共方法
import {InterActive} from "../../../core/providers/interActive";
import {TranslateService} from '@ngx-translate/core';
import {FileUploader} from "ng2-file-upload";
import { Conf } from "../../../config";
export class AddCourse {
// 初始化文件上传实例化对象
uploader: FileUploader;
constructor(
public translate: TranslateService,
public interActive: InterActive,
) {
i18n 代码国际化,翻译配置
this.message = {
size: "File size exceeds 100M, please upload again.",
file: "File type is not supported. Please upload again.",
};
this.translate.get(this.message.size).subscribe(value => {
this.message.size = value;
});
this.translate.get(this.message.file).subscribe(value => {
this.message.file = value;
});
// 直接添加文件上传监听事件
this.uploadPack();
}
// 触发文件input标签,选择文件
public selectVideo() {
document.getElementById('uploadPic').click();
}
// 选择文件后 处理文件大小和类型限制
public handleVideo(event: any) {
let url = event.target.value;
url = url.split("\");
// 上传文件队列数量限制,大于1个时,先移除第一个文件
if (this.uploader.queue.length > 1) {
this.uploader.queue[0].remove();
} else {
// 文件大小和类型限制
if (event.target.files[0]) {
let size = event.target.files[0].size;
let mime = event.target.files[0].type;
if (size > Conf.maxFileSize) {
this.interActive.toast(this.message.size);
} else if (_.indexOf(Conf.allowedMimeType, mime) == -1) {
this.interActive.toast(this.message.file);
}
}
}
}
public uploadPack() {
// 文件上传的服务器url地址
let url = "http://mail.ym.163.com";
// 文件上传参数配置(maxFileSize)最大文件限制,(allowMimeType)文件类型限制
let options = {
url: url,
removeAfterUpload: true,
method: "POST",
maxFileSize: Conf.maxFileSize,
allowedMimeType: Conf.allowedMimeType,
};
this.uploader = new FileUploader(options);
// 文件上传之前监听事件
this.uploader.onBeforeUploadItem = (fileItem: any) => {
fileItem.method = "post";
fileItem.alias = fileItem.file.name;
};
// 文件上传进度监听事件
this.uploader.onProgressItem = (fileItem: any, progress: any) => {
};
// 文件上传成功监听事件
this.uploader.onSuccessItem = (item: any, response: string, status: number) => {
};
// 文件上传附带的其他额外数据
this.uploader.onBuildItemForm = (fileItem: any, form: any) => {
let data = [{
files: [fileItem.file.name],
name:this.name,
.......
}];
console.log(fileItem)
form.append('data', JSON.stringify(data));
};
}
// 上传文件
public uploadVideo() {
this.uploader.uploadAll();
}}
}
5、总结:该插件最终是以formData数据格式传给后台的。