If 'ion-title' is an Angular component, then verify that it is part of this module.

 Error message:

1. If 'ion-title' is an Angular component, then verify that it is part of this module.

2. If 'ion-title' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message.

page ts 要加 entryComponents:

const tmpModule = NgModule({

         declarations: [tmpCmp],

         imports:[IonicModule],

         entryComponents: [tmpCmp]

    })(class {});