Angular ionic framework错误-URL:null的响应状态为0

我正在开发ionic应用程序。在服务器端有CodeIgniter。存在CORS问题，因此登录不起作用。 在浏览器中工作正常，但在模拟器和设备中存在此错误-

URL为null的响应状态为0

搜索，尝试了很多，但没有找到一个可行的解决方案。请检查下面的代码并帮助我解决问题

ionic.config.json

  "proxies": [
    {
      "path": "/login",
      "proxyUrl": "http://www.mydomain.coo/members/login"
    },
    {
      "path": "/update",
      "proxyUrl": "http://www.mydomain.coo/members/update"
    },
    {
      "path": "/register",
      "proxyUrl": "http://www.mydomain.coo/members/register"
    },

login.ts

  login() {
    this.showLoader('Authenticating...');
    this.postData = { isApp: '1', key: 'login', email:this.email, password:this.password };

    let data = JSON.stringify(this.postData);

    this.auth.login( this.postData ).then((result) => {

         this.loading.dismiss();

         this.data = result;
         if ( this.data.status == true )
         {
             localStorage.setItem('id', this.data.id);

    this.navCtrl.setRoot(TabsPage);
          }
          else
          {
            this.showLoader('Invalid Credentials...');
            this.loading.present();
            setTimeout(() => {
              this.loading.dismiss();
            }, 2000);
          }

    }, (err) => {
     this.loading.dismiss();
     this.presentToast(err);
    });


  }

  login(postData) {

    return new Promise((resolve, reject) => {

      let headers = new Headers( {
        'Access-Control-Allow-Origin' : '*',
        'Access-Control-Allow-Methods' : 'POST, GET, OPTIONS, PUT',
        'Content-Type': 'application/json; charset=UTF-8',
        'Accept': 'application/json'
      });

        this.http.post('/login', JSON.stringify(postData), {headers: headers})

        .subscribe(res => {

          resolve(res.json());

        }, (err) => {
          reject(err);
      });



    });


  }

header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Methods: POST, GET, OPTIONS");
header("Access-Control-Allow-Headers: X-PINGOTHER, Content-Type");      
header("Access-Control-Max-Age: 86400");

验证服务.ts

  login() {
    this.showLoader('Authenticating...');
    this.postData = { isApp: '1', key: 'login', email:this.email, password:this.password };

    let data = JSON.stringify(this.postData);

    this.auth.login( this.postData ).then((result) => {

         this.loading.dismiss();

         this.data = result;
         if ( this.data.status == true )
         {
             localStorage.setItem('id', this.data.id);

    this.navCtrl.setRoot(TabsPage);
          }
          else
          {
            this.showLoader('Invalid Credentials...');
            this.loading.present();
            setTimeout(() => {
              this.loading.dismiss();
            }, 2000);
          }

    }, (err) => {
     this.loading.dismiss();
     this.presentToast(err);
    });


  }

  login(postData) {

    return new Promise((resolve, reject) => {

      let headers = new Headers( {
        'Access-Control-Allow-Origin' : '*',
        'Access-Control-Allow-Methods' : 'POST, GET, OPTIONS, PUT',
        'Content-Type': 'application/json; charset=UTF-8',
        'Accept': 'application/json'
      });

        this.http.post('/login', JSON.stringify(postData), {headers: headers})

        .subscribe(res => {

          resolve(res.json());

        }, (err) => {
          reject(err);
      });



    });


  }

header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Methods: POST, GET, OPTIONS");
header("Access-Control-Allow-Headers: X-PINGOTHER, Content-Type");      
header("Access-Control-Max-Age: 86400");

Codeigniter index.php文件我有这个

  login() {
    this.showLoader('Authenticating...');
    this.postData = { isApp: '1', key: 'login', email:this.email, password:this.password };

    let data = JSON.stringify(this.postData);

    this.auth.login( this.postData ).then((result) => {

         this.loading.dismiss();

         this.data = result;
         if ( this.data.status == true )
         {
             localStorage.setItem('id', this.data.id);

    this.navCtrl.setRoot(TabsPage);
          }
          else
          {
            this.showLoader('Invalid Credentials...');
            this.loading.present();
            setTimeout(() => {
              this.loading.dismiss();
            }, 2000);
          }

    }, (err) => {
     this.loading.dismiss();
     this.presentToast(err);
    });


  }

  login(postData) {

    return new Promise((resolve, reject) => {

      let headers = new Headers( {
        'Access-Control-Allow-Origin' : '*',
        'Access-Control-Allow-Methods' : 'POST, GET, OPTIONS, PUT',
        'Content-Type': 'application/json; charset=UTF-8',
        'Accept': 'application/json'
      });

        this.http.post('/login', JSON.stringify(postData), {headers: headers})

        .subscribe(res => {

          resolve(res.json());

        }, (err) => {
          reject(err);
      });



    });


  }

header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Methods: POST, GET, OPTIONS");
header("Access-Control-Allow-Headers: X-PINGOTHER, Content-Type");      
header("Access-Control-Max-Age: 86400");

---

将auth-service.ts中的代码替换为

let headers = new Headers();
    headers.append('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');

从您的auth-service.ts

 let headers = new Headers( {
    'Access-Control-Allow-Origin' : '*',
    'Access-Control-Allow-Methods' : 'POST, GET, OPTIONS, PUT',
    'Content-Type': 'application/json; charset=UTF-8',
    'Accept': 'application/json'
  });

---

将auth-service.ts中的代码替换为

let headers = new Headers();
    headers.append('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');

从您的auth-service.ts

 let headers = new Headers( {
    'Access-Control-Allow-Origin' : '*',
    'Access-Control-Allow-Methods' : 'POST, GET, OPTIONS, PUT',
    'Content-Type': 'application/json; charset=UTF-8',
    'Accept': 'application/json'
  });

步骤1： 将其置于php代码之上

header（'Access-Control-Allow-Origin:'）；标题（'Access-Control-Allow-Headers:'）

步骤2：
创建一个.htaccess文件并粘贴下面的代码
标题集访问控制允许来源“*”标题集访问控制允许标题“*”

快乐编码，享受第1步：
将其置于php代码之上
header（'Access-Control-Allow-Origin:'）；标题（'Access-Control-Allow-Headers:'）

步骤2：
创建一个.htaccess文件并粘贴下面的代码
标题集访问控制允许来源“*”标题集访问控制允许标题“*”

快乐编码，享受