Javascript 如何使用angularjs显示文件上载的进度条

我正在使用这个指令

myApp.directive('fileModel', ['$parse', function ($parse) {
    return {
        restrict: 'A',
        link: function(scope, element, attrs) {
            var model = $parse(attrs.fileModel);
            var modelSetter = model.assign;
            console.log(modelSetter)
            element.bind('change', function(){
                scope.$apply(function(){
                    modelSetter(scope, element[0].files[0]);
                });
            });
        }
    };
}]);

我的服务是

myApp.service('fileUpload', ['$http', function ($http) {
    this.uploadFileToUrl = function(file, uploadUrl){
        var fd = new FormData();
        fd.append('file', file);
        $http.post(uploadUrl, fd, {
            transformRequest: angular.identity,
            headers: {'Content-Type': undefined}
        })
        .success(function(){
        })
        .error(function(){
        });
    }
}]);

在我的控制器中

$scope.uploadFile = function(){
        var file = $scope.myFile;
        console.log('file is ' );
        console.dir(file);
        var uploadUrl = "/fileUpload";
        fileUpload.uploadFileToUrl(file, uploadUrl);
    }; 

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我的问题是如何在将图像上传到url时显示进度条我的JSFIDLE url

试试这段代码，对我来说效果不错

this.uploadFileToUrl = function (file, uploadUrl, progressCB) {
    var fd = new FormData();
    fd.append('file', file);
    $http.post(uploadUrl, fd, {
        transformRequest: angular.identity,
        headers: { 'Content-Type': undefined },
        uploadEventHandlers: {
            progress: progressCB
        }
    })
        .success(function () {
        })
        .error(function () {
        });
}

$scope.uploadFile = function () {
    var file = $scope.myFile;
    console.log('file is ');
    console.dir(file);
    var uploadUrl = "/fileUpload";
    fileUpload.uploadFileToUrl(file, uploadUrl, , function (e) {
        if (e.lengthComputable) {
            var progressBar = (e.loaded / e.total) * 100;
            console.log(progressBar);
            //here you will get progress, you can use this to show progress
        }
    });
}; 

我想说的是，我所展示的。使用此指令。它内置了这些功能

$scope.upload = function (file) {
        Upload.upload({
            url: 'upload/url',
            data: {file: file, 'username': $scope.username}
        }).then(function (resp) {
            console.log('Success ' + resp.config.data.file.name + 'uploaded. Response: ' + resp.data);
        }, function (resp) {
            console.log('Error status: ' + resp.status);
        }, function (evt) {
            var progressPercentage = parseInt(100.0 * evt.loaded / evt.total);
            console.log('progress: ' + progressPercentage + '% ' + evt.config.data.file.name);
        });
    };

请参阅演示

尝试使用

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获取类型错误a不是一个函数

TypeError:a不是一个函数
@User_3535在服务或控制器中？@User_3535我想你是在搞依赖注入，请检查一下，谢谢它工作了，我在一个控制器中实现，在另一个控制器中检查，糟糕，好，没问题。
NProgress.start()

NProgress.done()