[2.3.0 and 3.0.1] ion-scroll on iOS (WkWebView) not scrollable

[peterpeterparker]

Ionic version: (check one with "x")
[ ] 1.x
[X ] 2.x
[ X] 3.x

I'm submitting a ... (check one with "x")
[ X] bug report

Current behavior:
Scrolling in an ion-scroll on iOS (WkWebView) doesn't work respectively ion-scroll looks frozen / can't be scrolled

Related issues:

#10938

#10936

Notes:

I use WkWebView.

I use to solve that issue in Ionic 2.3.0 and 3.0.0-beta by enabling the enableScrollListener() on the content by myself but this method doesn't exists anymore in Ionic 3.0.1 aka I use to solve that issue like following:

ionViewDidEnter() {
   content.enableScrollListener();
}

Expected behavior:

A fix for the ion-scroll scrolling or a redo of the method content.enableScrollListener()

Ionic info: (run ionic info from a terminal/cmd prompt and paste output below):

Your system information:

Cordova CLI: 6.5.0
Ionic Framework Version: 3.0.1
Ionic CLI Version: 2.2.1
Ionic App Lib Version: 2.2.0
Ionic App Scripts Version: 1.3.1
ios-deploy version: 1.9.0
ios-sim version: 5.0.13
OS: macOS Sierra
Node Version: v7.2.1
Xcode version: Xcode 8.3 Build version 8E162

[manucorporat]

@peterpeterparker what does "Scrolling in an ion-scroll on iOS (WkWebView) still doesn't work" mean? it does not scroll? or the scroll events are not being dispatched?

[peterpeterparker]

@manucorporat with "scrolling doesn't work" I meant that the ion-scroll can't be scrolled, like "frozen".

something like following works fine with ionic serve or on a android phone but doesn't on iOS

<ion-scroll scrollY="true">
     <ion-list padding>
           <ion-item>
               <p>1</p>
           </ion-item>
          ....
           <ion-item>
               <p>9999</p>
           </ion-item>
     </ion-list>
 </ion-scroll>

Update: Sometimes works in pages, 100%, at least in my case, of the time doesn't work when used in modals

[peterpeterparker]

Even if I meet the error "only" after having upgraded to Ionic 3 and nothing on my app side, it seems that the bug should be on me. I built another minimal app and it seems to work, the ion-scroll is scrollable on ios. Therefore I close this issue and only if needed gonna open a new one.

[peterpeterparker]

Found the problem. After upgrading to Ionic 3, at least in my case, the swipe event on an ion-list in an ion-scroll freeze my scroll.

<ion-scroll scrollY="true">
 <ion-list padding (swipe)="someThing($event)"> <!-- There, swipe, removing it make my ion-scroll scrollable again -->
       <ion-item>
           <p>1</p>
       </ion-item>
      ....
       <ion-item>
           <p>9999</p>
       </ion-item>
     </ion-list>
  </ion-scroll>

[ionitron-bot]

Thanks for the issue! This issue is being locked to prevent comments that are not relevant to the original issue. If this is still an issue with the latest version of Ionic, please create a new issue and ensure the template is fully filled out.