前言

本文主要给大家介绍了关于Angular.js中上传指令ng-upload的基本使用，分享出来供大家参考学习，下面话不多说，来一起看看详细的介绍：

Angular上传指令ng-upload的基本使用，包括上传文件，图片，以及图片和视频在线预览，非常强大。ng-upload有两种用法，一种是选择上传文件，仅仅存起来，还有一种就是选择之后，立刻出发一个上传函数，虽然这个函数可以不做http upload的操作。

1.首先包含库文件

<script src="angular.min.js"></script>
 <!-- shim is needed to support non-HTML5 FormData browsers (IE8-9)-->
 <script src="ng-file-upload-shim.min.js"></script>
 <script src="ng-file-upload.min.js"></script>

2.只选择，有submit上传

Upload on form submit or button click
 <form ng-app="fileUpload" ng-controller="MyCtrl" name="form">
 Single Image with validations
 <div class="button" ngf-select ng-model="file" name="file" ngf-pattern="'image/*'"
 ngf-accept="'image/*'" ngf-max-size="20MB" ngf-min-height="100" 
 ngf-resize="{width: 100, height: 100}">Select</div>
 Multiple files
 <div class="button" ngf-select ng-model="files" ngf-multiple="true">Select</div>
 Drop files: <div ngf-drop ng-model="files" class="drop-box">Drop</div>
 <button type="submit" ng-click="submit()">submit</button>
 </form>

3.选择之后，立马上传

Upload right away after file selection:
 <div class="button" ngf-select="upload($file)">Upload on file select</div>
 <div class="button" ngf-select="uploadFiles($files)" multiple="multiple">Upload on file select</div>
 Drop File:
 <div ngf-drop="uploadFiles($files)" class="drop-box"
 ngf-drag-over-class="'dragover'" ngf-multiple="true" 
 ngf-pattern="'image/*,application/pdf'">Drop Images or PDFs files here</div>
<div ngf-no-file-drop>File Drag/Drop is not supported for this browser</div>

4.upload模块还能显示图片预览

Image thumbnail: <img ngf-thumbnail="file || '/thumb.jpg'">
 Audio preview: <audio controls ngf-src="file"></audio>
Video preview: <video controls ngf-src="file"></video>

这个里面注意了：这里面的file不是图片路径，而是，ngf-select ng-model="file" name="file"操作的时候，或者ngf-select="upload($file)传给调用函数的那个file对象

总结