我做了一个XHR上传Angular服务,我试图通过$ rootscope广播上传进度
...
xhr.upload.onprogress=function (evt){
if (evt.lengthComputable) {
percentComplete = Math.round((evt.loaded / evt.total)*100);
console.log(percentComplete)
$rootScope.$broadcast('upload:progress', percentComplete);
}else{
$rootScope.$broadcast('upload:progress', 'not computable');
}
}
...
,指令是
...
$scope.$on('upload:progress', function (event,data) {
console.log('progress ' + data)
$scope.progress = data
})
...
html文件是:
<div ng-controller="uploadController">
<input class="selectFile" type="file" multiple ng-model="files" file-change></input>
<br><br>
Selected: {{ files.length }}
{{files}}
<br><br>
<a href="" ng-click="upload()">Start Upload</a>
-- {{progress}}
</div>
控制台正确写入两个日志(xhr.upload.onprogress中的日志和$ scope。$ on中的另一个日志),但$ scope.progress不会更改....
出了什么问题?
谢谢!
答案 0 :(得分:1)
由于它是在AngularJS生命周期之外的异步调用,因此您需要显式运行$scope.$apply
以触发$digest
,这将更新视图:
$scope.$apply(function () {
$scope.progress = data;
});