如何在 Ionic 中以反应形式有条件地进行形式验证？

Question

我想根据用户类型显示不同的字段，并根据用户类型有条件地进行表单验证。我不想为每种类型的用户创建单独的表单。用户分为白金、黄金、普通三种。

.ts文件代码

   this.signupForm = this.formBuilder.group(
      {
        mobileNumber: new FormControl(
          '',
          Validators.compose([
            Validators.required,
            Validators.pattern(this.regExNumberCell),
          ])
        ),

  
        confermPassword: new FormControl(
          '',
          Validators.compose([
            Validators.required,
            Validators.pattern(this.regExPassword),
          ])
        ),
        surName: new FormControl(
          '',
          Validators.compose([
            Validators.required,
            Validators.pattern(this.regExsurName),
          ])
        ),
        email: new FormControl(
          '',
          Validators.compose([
            Validators.required,
            Validators.pattern(this.regExEmail),
          ])
        ),

        name: new FormControl(
          '',
          Validators.compose([
            Validators.required,
            Validators.pattern(this.regExName),
          ])
        ),

        password: new FormControl(
          '',
          Validators.compose([
            Validators.required,
            Validators.pattern(this.regExPassword),
          ])
        ),
      },
      { validator: this.passwordsMatchValidator }
    );

Answer 1

您可以按如下方式有条件地创建带验证的表单：

在您的 .ts 文件中

if (user === 'normal') {
  // Inside this clause put the validation logic for normal user and make the fields required and optional according to your requirement
  this.signupForm = this.formBuilder.group(
  {
    mobileNumber: new FormControl(
      '',
      Validators.compose([
        Validators.required,
        Validators.pattern(this.regExNumberCell),
      ])
    ),
   }
   // ....
  );

}
else if (user === 'gold') {
// Inside this clause put the validation logic for gold user and make the fields required and optional according to your requirement
  this.signupForm = this.formBuilder.group(
  {
    mobileNumber: new FormControl(
      '',
      Validators.compose([
        Validators.required,
        Validators.pattern(this.regExNumberCell),
      ])
     

    ),  // .... 
    }
   );

  }

 else if (user === 'platinum') {
 // Inside this clause put the validation logic for platinum user and make the fields required and optional according to your requirement
  this.signupForm = this.formBuilder.group(
  {
    mobileNumber: new FormControl(
      '',
      Validators.compose([
        Validators.required,
        Validators.pattern(this.regExNumberCell),
      ])

    ),           // ....
   }
  );

       }

在.html文件中可以根据用户类型显示和隐藏字段，例如：

 <ng-container *ngIf="user!== 'gold'">
    <ion-label class="inputTitle-label">Username</ion-label>
    <div class="input-container">
      <ion-input
        class="input"
        formControlName="username"
        autocomplete="off"
        type="text"
        required
      ></ion-input>
    </div>

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