ionic2: API 响应数据未定义？

Question

我正在使用 ionic2，我想向 api 服务器发出登录请求，但我有响应 => undefined 这是提供程序中的代码：

loginUser(email, password, macId, token) {
   let userObject = {
       "email": email,
       "password": password,
       "mac" : macId,
       "token" : token
   }
    var headers = new Headers();
    headers.append('Content-Type', 'application/json');
    headers.append('Access-Control-Allow-Origin', '*');
    console.log('object: ',userObject);
    return this.http.post(this.loginUrl, userObject, {headers:headers})
    .map((response: Response) => response.json())    
  }

这是 login page 中的代码：

loginUser(email,password) {
console.log('email: ',email,'password: ',password);
if(!this.loginForm.valid){
 this.submitAttempt = true;
} else {
 this.submitAttempt = false;
 this.deviceInfo.macId = this.device.uuid;
 this.fcm.getToken().then(token=>{
   this.token = token;
   });
 this.userProvider.loginUser(email,password,this.deviceInfo.macId,this.token)
 .subscribe(data=> {
   alert("data is "+data);
 },
   (err)=>{
     alert("err"+err);
   }
 )


}

输出应该是：

{
  msg : "SyGgTmNHxJcZFYJu6RootUHAqzdkhPNzsTGJHipeBZQSN8nHdbHga4gQ3jENesNPsK5tdtGKlmUa5g3cIVDO4ZqqENd5uPizwgWkq6z3CyUXAhyns8PTnNPwax7lgKRiY7I67qmiPCpZdwu2Kh5v7U"
}

但实际输出：

data: "undefined"

我该怎么办？

Answer 1

您不需要 map 它，只需 return this.http.post 在您的 userProvider 函数中返回的 promise 并使用 .then() 你在哪里调用它来获取数据：

loginUser(email, password, macId, token) {
   let userObject = {
       "email": email,
       "password": password,
       "mac" : macId,
       "token" : token
   }
   var headers = new Headers();
   headers.append('Content-Type', 'application/json');
   headers.append('Access-Control-Allow-Origin', '*');
   console.log('object: ',userObject);
   return this.http.post(this.loginUrl, userObject, {headers:headers});  
}

和...

loginUser(email,password) {
  console.log('email: ',email,'password: ',password);
  if(!this.loginForm.valid){
  this.submitAttempt = true;
} else {
  this.submitAttempt = false;
  this.deviceInfo.macId = this.device.uuid;
  this.fcm.getToken().then(token=>{
    this.token = token;
  });
this.userProvider.loginUser(email,password,this.deviceInfo.macId,this.token)
     .then(data=> {
       alert("data is "+data);
     },
       (err)=>{
         alert("err"+err);
       }
     )
}

ionic2: API 响应数据未定义？

ionic2: API response data undefined?

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ionic2

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