我是新手,我对官方网站的文档有点困惑...
我有控制器,在那里我可以调用服务方法:
uploaderService.addImage(files);
以及这样的服务:
.service('uploaderService', ['$http', 'settings', function ($http, settings) {
var url = undefined;
var addImage = function(files){
var fd = new FormData();
fd.append("file", files[0]);
$http.post(settings.apiBaseUri + "/files", fd,
{
withCredentials: true,
headers: {'Content-Type': undefined },
transformRequest: angular.identity
})
.success(function (data, status, headers, config) {
url = "temp.jpg";
})
.error(function (err, status) {
console.log('operation failed, status: ' + status);
});
};
var deleteImage = function(){
};
return {
addImage: addImage,
deleteImage: deleteImage
};
我如何才能等到发布数据请求完成后再传递url变量位置?我经常尝试,但是有些不好,需要帮助)
最佳答案
延迟注入角度:
.service('uploaderService', ['$http', '$q', 'settings', function ($http, $q, settings) {
然后在您的函数中使用它:
var addImage = function(files){
var deferred = $q.defer();
var fd = new FormData();
fd.append("file", files[0]);
$http.post(settings.apiBaseUri + "/files", fd,
{
withCredentials: true,
headers: {'Content-Type': undefined },
transformRequest: angular.identity
})
.success(function (data, status, headers, config) {
url = "temp.jpg";
deferred.resolve(data);
})
.error(function (err, status) {
console.log('operation failed, status: ' + status);
deferred.reject({msg: err});
});
return deferred.promise;
};
然后在您的控制器中:
uploaderService.addImage(files)
.then(function(data){
// success
var url = data.url; // assuming the returned data of the ajax call contains an url variable
}, function(error){
// error
}).finally(function(){
// always
});
关于javascript - promise 的 Angular 异步上传文件,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/27704385/