问部分显示Ionic3 LoadingController

EN

ion-spinner {
    position: fixed;
    top: 0px;
    left: 0px;
    right: 0px;
    bottom: 0px;
    margin: auto;
    z-index: 9;
}

<ion-content>
    <ion-spinner></ion-spinner>
</ion-content>

presentLoadingCustom() {
  const loading = this.loadingCtrl.create({
    spinner: 'hide',
    content: `
      <div class="custom-spinner-container">
        <div class="custom-spinner-box"></div>
      </div>`,
    duration: 5000
  });

  loading.onDidDismiss(() => {
    console.log('Dismissed loading');
  });

  loading.present();
}