angularJs中上传图片/文件功能:ng-file-upload
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在做网站的过程中难免会遇到上传图片或者上传文件的功能,使用AngularJ实现的话可以用angularJs的ng-file-upload这个库。
支持上传文件(目前为止我用过的是Excel上传,与上传图片的方法一样)
支持单张图片上传
支持多张图片上传
支持拖拽图片上传
1.Install安装引用
手册:可以从这里下载最新的js库
Bower安装:
bower install ng-file-upload-shim --save
(for non html5 suppport)
bower install ng-file-upload --saveNuGet:PM> Install-Package angular-file-upload
NPM:npm install ng-file-upload
<script src="angular(.min).js"></script> <script src="ng-file-upload-shim(.min).js"></script> <!-- for no html5 browsers support --> <script src="ng-file-upload(.min).js"></script>
2.Usage用法
(1)Single image upload
image-upload.html://显示选择的图片<img ngf-src="data.file || data.defaultImage" class="img-responsive" style="width:200px; height: 200px; max-width:500px;"/> <div class="button" ngf-select="" ngf-pattern="‘image/*‘" ngf-multiple="false" ng-model="data.file">选择文件</div> <button ng-click="upload()">upload</button> image-upload-ctrl.js: $scope.data = { file: null}; $scope.upload = function () { if (!$scope.data.file) { return; } var url = $scope.params.url; //params是model传的参数,图片上传接口的url var data = angular.copy($scope.params.data || {}); // 接口需要的额外参数,比如指定所上传的图片属于哪个用户: { UserId: 78 } data.file = $scope.data.file; Upload.upload({ url: url, data: data }).success(function (data) { $scope.hide(data); }).error(function () { logger.log(‘error‘); }); };
(2)Multiple images upload
<div class="button" ngf-select ngf-pattern="‘image/*‘" ng-model="files" ngf-multiple="true">选择多张图片</div> //ngf-multiple控制是否可以上传多张图片 // for multiple files: $scope.upload = function (files) { if (files && files.length) { for (var i = 0; i < files.length; i++) { Upload.upload({..., data: {file: files[i]}, ...})...; } // or send them all together for HTML5 browsers: Upload.upload({..., data: {file: files}, ...})...; } }
(3)Drop Single image
image-upload.html:<button class="btn btn-default" ngf-select="" ngf-pattern="‘image/*‘" ng-model="data.file" ngf-multiple="false"> 选择图片</button> <span>(支持拖拽单张图片上传)</span> <div ngf-drop ngf-pattern="‘image/*‘" ng-model="data.file" class="cropArea"> <img-crop image="data.file|| data.defaultImage" resule-image="data.file"></img-crop> <div class="col col-sm-4 text-left"> <img ngf-src="data.file|| data.defaultImage" style="width:200px; height: 200px; max-width:500px;"/> </div> </div> <button class="btn btn-primary" ng-click="upload()">开始上传</button> style.css: .cropArea { background: #E4E4E4; min-height: 230px; height: auto; margin: 15px; margin-right: 0; }
(4)Drop and Select Multiple images upload
image-upload.html:<button class="btn btn-default" ngf-select="selectImage($files)" ngf-pattern="‘image/*‘" ngf-multiple="true"> 选择图片</button> <span>(支持多张图片拖拽上传)</span> <div class="row cropArea" style="padding: 0 15px 15px 0" ngf-drop ngf-pattern="‘image/*‘" ng-model="files" ngf-multiple="true"> <img-crop image="files || data.defaultImage" resule-image="files"></img-crop> <div ngf-no-file-drop>该浏览器不支持拖拽上传。</div> <div class="col col-xs-4 text-left" style="margin-top: 15px;" ng-repeat="image in mulImages"> <div ng-repeat="oneImage in image"> <img ngf-src="oneImage || data.defaultImage" class="img-responsive" style="width:200px; height: 200px; max-width:500px;"/> </div> </div> </div>//<img-crop></img-crop>定义了图片可以拖拽的位置//<img/>排列显示上传的多张图片 style.css: .cropArea { background: #E4E4E4; min-height: 230px; height: auto; margin: 15px; margin-right: 0; } image-upload-ctrl.js: $scope.data = { file: null, defaultImage: commonSvc.defaultImage }; $scope.mulImages = []; $scope.$watch(‘files‘, function () { $scope.selectImage($scope.files); });//根据选择的图片来判断 是否为一下子选择了多张//一下子选择多张的数据格式为一个数组中有多个对象,而一次只选择一张的数据格式为一个数组中有一个对象$scope.selectImage = function (files) { if (!files || !files.length) { return; } if (files.length > 1) { angular.forEach(files, function (item) { var image = []; image.push(item); $scope.mulImages.push(image); }) } else { $scope.mulImages.push(files); } }; $scope.upload = function () { if (!$scope.mulImages.length) { return; } var url = $scope.params.url; var data = angular.copy($scope.params.data || {}); data.file = $scope.mulImages; Upload.upload({ url: url, data: data }).success(function (data) { $scope.hide(data); $rootScope.alert(‘success‘); }).error(function () { $rootScope.alert(‘error’); }); };
以上内容是我做项目中需要的一些功能,也许不是该库全面的功能,若有其他需求可以查看GitHub官方文档:https://github.com/danialfarid/ng-file-upload
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