问题描述
如下图，点击“选择图片”
然后过了约6秒，系统弹出框来，选择图片
其他功能能正常使用。尝试了很多次，每次都要较长时间才能进行图片选择。为什么需要那么长的时间才能选择图片？
以下是我的代码：
HTML
<!DOCTYPE html>
<html ng-app="fileUpload">
<head>
<meta name="renderer" content="webkit|ie-comp|ie-stand">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"/>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>AngularJs</title>
<script type="text/javascript" src="js/lib/angular/angular.js"></script>
<script type="text/javascript" src="js/lib/angular/ng-file-upload.min.js"></script>
<script type="text/javascript" src="js/lib/angular/ng-file-upload-shim.min.js"></script>
<script type="text/javascript" src="js/lib/angular/ng-img-crop.js"></script>
</head>
<body ng-app="fileUpload" ng-controller="MyCtrl">
<form name="myForm">
<p>Crop Image and Upload</p>
<button ngf-select ng-model="picFile" accept="image/*">Select Picture</button>
<p ngf-drop ng-model="picFile" ngf-pattern="image/*" class="cropArea">
<img-crop image="picFile | ngfDataUrl" result-image="croppedDataUrl" ng-init="croppedDataUrl=''"></img-crop>
</p>
<p><img ng-src="{{croppedDataUrl}}" /></p>
<button ng-click="upload(croppedDataUrl, picFile.name)">Submit</button>
<span class="progress" ng-show="progress >= 0">
<p style="width:{{progress}}%" ng-bind="progress + '%'"></p>
</span>
<span ng-show="result">Upload Successful</span>
<span class="err" ng-show="errorMsg">{{errorMsg}}</span>
</form>
</body>
</html>javascript
<script type="text/javascript">
var app = angular.module('fileUpload', ['ngFileUpload', 'ngImgCrop']);
app.controller('MyCtrl', ['$scope', 'Upload', '$timeout', function ($scope, Upload, $timeout) {
$scope.upload = function (dataUrl, name) {
Upload.upload({
url: 'https://angular-file-upload-cors-srv.appspot.com/upload',
data: {
file: Upload.dataUrltoBlob(dataUrl, name)
},
}).then(function (response) {
$timeout(function () {
$scope.result = response.data;
});
}, function (response) {
if (response.status > 0) $scope.errorMsg = response.status
+ ': ' + response.data;
}, function (evt) {
$scope.progress = parseInt(100.0 * evt.loaded / evt.total);
});
}
}]);
</script>CSS
<style type="text/css">
.cropArea {background: #E4E4E4; overflow: hidden; width:500px; height:350px; }
form .progress {line-height: 15px; }
.progress {display: inline-block; width: 100px; border: 3px groove #CCC; }
.progress p {font-size: smaller; background: orange; width: 0; }
img-crop {width: 100%; height: 100%; display: block; position: relative; overflow: hidden; }
img-crop canvas {display: block; position: absolute; top: 50%; left: 50%; outline: none; -webkit-tap-highlight-color: rgba(255, 255, 255, 0);}
</style>【参考】
上面的代码来自：http://jsfiddle.net/danialfar...
ng-file-upload介绍：https://github.com/danialfari...
![[Web-Frontend] Node.js-Schnellstart](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
有可能是因为没有设置上传文件类型的原因，我之前也是有这样的问题改成
accept: 'image/jpg,image/jpeg,image/png'就好了accept会在计算机中进行过滤，所有打开很慢。换成ngf-pattern过滤，如何不符合ngf-pattern="image/*的话，返回值是null,不会是你上传的文件。