如何在离子应用程序中设置 setCancelable(false)?

How to set setCancelable(false) in ionic app?

我想在警报对话框中禁用自动取消,但我不知道,我搜索了一下,我想要 android studio:

builder.setCancelable(假);

工作,请帮帮我

ionic 3 上将 enableBackdropDismiss 设置为 false

   let alert = this.alertController.create({
    title: 'Alert',
    subTitle: 'Subtitle',
    message: 'This is a test.',
    enableBackdropDismiss:false
  });

  alert.present();

ionic 4 上将 backdropDismiss 设置为 false

 const alert = await this.alertController.create({
  header: 'Alert',
  backdropDismiss: false,
  subHeader: 'Subtitle',
  message: 'This is a test.',

 });

 await alert.present();