angularJs中上传图片/文件功能：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>

p_w_picpath-upload.html://显示选择的图片<img ngf-src="data.file || data.defaultImage" class="img-responsive" />
<div class="button" ngf-select="" ngf-pattern="'p_w_picpath/*'" ngf-multiple="false" ng-model="data.file">选择文件</div>
<button ng-click="upload()">upload</button>
 p_w_picpath-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');
    });
};

<div class="button" ngf-select ngf-pattern="'p_w_picpath/*'" 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}, ...})...;
      }
    }

p_w_picpath-upload.html:<button class="btn btn-default" ngf-select="" ngf-pattern="'p_w_picpath/*'" 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="'p_w_picpath/*'" ng-model="data.file" class="cropArea">
    <img-crop p_w_picpath="data.file|| data.defaultImage" resule-p_w_picpath="data.file"></img-crop>

    <div class="col col-sm-4 text-left">
        <img ngf-src="data.file|| data.defaultImage"
             />
    </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;
}

p_w_picpath-upload.html:<button class="btn btn-default" ngf-select="selectImage($files)" ngf-pattern="'p_w_picpath/*'"
        ngf-multiple="true">
    选择图片</button>
<span>(支持多张图片拖拽上传)</span>
<div class="row cropArea"  ngf-drop ngf-pattern="'p_w_picpath/*'" ng-model="files"
     ngf-multiple="true">
    <img-crop p_w_picpath="files || data.defaultImage" resule-p_w_picpath="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"  ng-repeat="p_w_picpath in mulImages">
        <div ng-repeat="oneImage in p_w_picpath">
            <img ngf-src="oneImage || data.defaultImage" class="img-responsive" 
                 />
        </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;
}

p_w_picpath-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 p_w_picpath = [];
            p_w_picpath.push(item);
            $scope.mulImages.push(p_w_picpath);
        })
    } 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’);
    });

};