您需要实现一个承诺以从异步方法中获取值。你可以使用q
npm 的模块来实现 promise。
要安装q
,在终端中运行以下命令,
npm install q
q
下载后,在您的应用程序中使用它,如下所示,
var q= require('q');
servicehitest : function () {
var url ="someurl";
var args= [];
var defered = q.defer();
soap.creatClient(url,creatClient);
function clientCreate(err,client) {
if(err){
console.log("in error block");
console.log(client.describe());
}
client.getInstrument(args,instrument);
function instrument(err,result){
if(err){
defered.reject(err);
} else {
console.log(result);
defered.resolve(result);
}
}
}
return defered.promise;
}
要从servicehitest
方法获取结果,请使用以下代码。
servicehitest().then(function(result){
//this method will be called when the result is obtained from getInstrument() method.
console.log("Successfully got result:"+result);
},
function(error){
//error callback method will be called if there is any error from getInstrument() method.
console.log("Some error occured:"+error);
})