As you can see in Ionic docs registerBackButtonAction
returns a function:
A function that, when called, will unregister its back button
action.
So you can use that function to restore the default behavior when leaving the page, like this:
import { Component} from '@angular/core';
@Component({
selector: 'page-home',
templateUrl: 'home.html'
})
export class HomePage {
// Property used to store the callback of the event handler to unsubscribe to it when leaving this page
public unregisterBackButtonAction: any;
constructor(...) { ... }
ionViewDidEnter() {
this.initializeBackButtonCustomHandler();
}
ionViewWillLeave() {
// Unregister the custom back button action for this page
this.unregisterBackButtonAction && this.unregisterBackButtonAction();
}
public initializeBackButtonCustomHandler(): void {
this.unregisterBackButtonAction = this.platform.registerBackButtonAction(() => {
this.customHandleBackButton();
}, 10);
}
private customHandleBackButton(): void {
// do what you need to do here ...
}
}
So as you can see, the key is to store the callback of the registerBackButtonAction
method and use it later when leaving the page (or when you want to restore the default behavior):
this.unregisterBackButtonAction = this.platform.registerBackButtonAction(() => {
this.customHandleBackButton();
}, 10);
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…