Ionic 2/3 Back Button appears next to menu - ionic-framework

In my app I have at every page the "hideBackButton" on true. This works except on one page where that button appears next to the menu button (see screenshot). This back button hasn't any functionality here.
Is there a way to hide it? Perhaps by a css hack? Any help would be great.
There are pages where the back button should be visible, so I can't hide it in the entire app.


One way to hide the back button would be to set that page as the root page, instead of just pushing it. So instead of
this.navCtrl.push(ThePage)
try with
this.navCtrl.setRoot(ThePage)
That's one way to do it. If you don't want to change that, you can replace the ion-navbar for an ion-toolbar. So instead of
<ion-header>
<ion-navbar>
<ion-title>
Events Feed
</ion-title>
</ion-navbar>
</ion-header>
You can hide the back button with this:
<ion-header>
<ion-toolbar>
<ion-title>
Events Feed
</ion-title>
</ion-toolbar>
</ion-header>
I'd prefer the first fix, but I'm not sure of what are the requirements on your end.

Related

Why is the ion-back-button not shown?

The ion-back-button does NOT show up to the right of the ion-menu-button. Why is that?
the ion-menu-button and the ion-title show properly and aligned on the same horizantal position.
<ion-header>
<ion-toolbar>
<ion-buttons slot="start">
<!-- navigation button-->
<ion-menu-button></ion-menu-button>
<!-- optional back button-->
<ion-back-button></ion-back-button>
</ion-buttons>
<ion-title>
{{ pageTitle | translate}}
</ion-title>
</ion-toolbar>
</ion-header>
In the DOM inspector the CSS display attribute of the ion-back-button is set to none. Why would it set itself to none?
I used
this.navCtrl.navigateForward('/term/' + term);
to navigate to this page, thus I expect the back button to pick this up. Why is navigateForward not adding to the stack, which would make the ion-back-button show?

If there is no page in Stack then
<ion-back-button></ion-back-button>
will not show. If you want to show then You need to be added a specific page in "defaultHref" Attribute.
<ion-back-button defaultHref="logout"></ion-back-button>
you need to be learned from here
https://ionicframework.com/docs/api/back-button

It will not visible if there will be no previous overlay/page to show
So you can set css
ion-back-button {
display: block;
}
Then add click event on element
<ion-back-button (click)="close()">
<ion-icon name="close"></ion-icon>
</ion-back-button>
Add on .ts file
click() {
this.modalCtrl.dismiss();
}

For anyone who has this trouble, and the ion-back-button is still not appearing, check that you have the IonicModule imported in your page's module. It happened to me that I created a component for the ion-header and the ion-back-button was not appearing. It was because my ComponentsModule (the one that declares and exports all my components) had only the CommonsModule imported and not the IonicModule. So always check for the IonicModule in your imports. Otherwise the back button will not appear

Is it root page? if so ion-back-button will not show up.
Try adding the attribute defaultHref. For example: <ion-back-button defaultHref="home"></ion-back-button>. it should show up regardless of having no navigation stack.

So Ionic developers make life complicated, now (Ionic5) the attribute is called default-href and not defaultHref.
But still when clicking not loading to the href.

Workaround. I programmatically decide with the URI path. Drawback, if more detail pages are added to the app, they need to be added (e.g. in an array of back-button-qualifying paths).
<ion-button *ngIf="router.url.includes('/term/')"><ion-icon name="arrow-back"></ion-icon></ion-button>
Added the Router Object to the constructor of this component
constructor(public router: Router) { }
If someone still comes up with why the programmatic navigation does NOT add to the navigation stack - so that the back button would appear on the detail page - I gladly listen.

Just need to add the color in scss file to show up.
ion-back-button{
--color: black;
}
And also don't forget to indicate the href, adding it html file
<ion-buttons slot="start">
<ion-back-button defaultHref="YourRouteHere"></ion-back-button>
</ion-buttons>

Make sure you arrived to that page via a router link that modifies the route history. Otherwise the backbutton wont show because there is no recorded history of a previous route.
My issue was, the link i clicked which takes me to a page forward, had routerDirection="none". So there was no previous route so my back button didn't show.
Changing
<IonRouterLink routerDirection="none" routerLink={`/item/${item.id}`}>...</IonRouterLink>
To
<IonRouterLink routerDirection="forward" routerLink={`/item/${item.id}`}>...
fixed my issue.

Unique Ion-title on each page, same clickable item on all pages

I would like to have a unique ion-title for each page of my ionic app (News, Search etc) but include a settings icon in the toolbar as well that will bring up a modal with a couple different options for the user to interact with. I want to avoid rebuilding the settings icon to keep my code DRY, prevent the unnecessary imports, and preserve separation of concerns.
news.page.html
<ion-header>
<ion-toolbar>
<ion-title>
News
</ion-title>
</ion-toolbar>
</ion-header>
app.component.html
<ion-app>
<ion-header>
<ion-icon (click)='openSettings()' slot='end' name='settings'></ion-icon>
</ion-header>
<ion-router-outlet></ion-router-outlet>
</ion-app>
As expected the page header overwrites the entire app header. I am thinking about building a separate settings icon component, but (I believe) that will require me to import it into every page.
Any help is appreciated.

Ionic remove back button and display Menu button

I am new to Ionic and i would like to remove the back button and only display the menu button on all my pages. Where can i do this?

You need to add attribute persistent="true" to ion-menu
Like that.
<ion-menu side="left" [content]="content" persistent="true"></ion-menu>
then menuToggle button will be available on all views.
You can find more details here in the docs.
For hiding back button you can try this code:
<ion-header>
<ion-navbar hideBackButton >
<ion-title>PageTitle</ion-title>
</ion-navbar>
</ion-header>
I tested in my project. It works fine.

Fixed header above Ionic 2 content / navbar With page transitions

I want to have a fixed logo in the Ionic2 framework. I have transitions between pages and the header and pages gets slid in. I want to know if I can keep the header / logo a constant above anything on the page.
<ion-header>
<a (click)="goToRoot()" ><img src="assets/img/topBar-iPad.png" alt=""/></a>
</ion-header>
<ion-content padding>
</ion-content>
I have tried it with the toolbar this doesn't work either.

If you want put an image in header, you can use this code:
<ion-header>
<ion-navbar>
<ion-title>Title</ion-title>
<ion-buttons end>
<img height="35px" width="35px" src="assets/img/topBar-iPad.png">
</ion-buttons>
</ion-navbar>
</ion-header>

This might get a bit tricky if you app becomes a bit more complex over time, however what you can do is add your <ion-header> element to your app.html file found in src -> app.
That sets it at top level above the pages you are navigation to.
If your app does become complex over time where only in some cases you want the toolbar to be fixed at the top you might need to either create a custom component based on the element or pass in a *ngIf ( or [hidden]="") and then write logic to support its visibility.

Replace back button with menu if no page to go back - Ionic

I'm developing an ionic app on android. I'm facing a problem where back button doesn't show up when there's no page to go back.
For more detailed explanation:
Scenario 1: Button from side menu when click go to View B.
Scenario 2: Button from side menu to View A, then button from View A to View B.
Scenario 2 View B shows back button, since it has a previous page, but Scenario 1 doesn't have a previous page that's why it doesn't show the back button, How do I display the menu button if there's no back button?
Here's my code below:
<ion-view view-title="MY View">
<ion-nav-bar>
<ion-nav-back-button></ion-nav-back-button>
<ion-nav-buttons side="right">
<button class="button" type="submit"
ng-click="goEdit(data.ID)">Edit</button>
</ion-nav-buttons>
</ion-nav-bar>
<ion-content class="has-header">
</ion-content>
</ion-view>
Additional Info:
When removing the <ion-nav-bar> it displays the menu button, but of course will no longer show back button and edit button. When I try putting ng-hide in <ion-nav-bar ng-hide="isMenu"> it doesn't show any nav-bar since it's hidden but from html inspect element it's still there but hidden only. Any work around on this?

If you set a page as a rootPage and also use menu in you will see menu button. when navigating to another page from root if you use navCtrl.push() back button will automatically be added to the pushed view.if you set second page as a rootPage again you will see menu button again.
But if you want to implement it yourself that is another thing.
also check this link

Consider customizing the navbar/toolbar only for the pages that needs it.
By having an ion-toolbar in the ion-header, it appears on top of the default ion-navbar. So it is a workaround to have a custom header bar with my close icon and my custom function gotoHome(). That's the best way i found to customize the 'navbar' for a particular page.
<ion-header>
<ion-toolbar>
<ion-buttons left>
<button ion-button icon-only (click)="gotoHome()">
<ion-icon name="close"></ion-icon>
</button>
</ion-buttons>
<ion-title>Title</ion-title>
</ion-toolbar>
</ion-header>
<ion-content padding>
...
</ion-content>
The same answer applies to this topic, for reference :
Ionic Change back button icon for one page only