Nativescript-ui-feedback: [RadListView] iOS Swiping reused cell to crash

[kssfilo]

[RadListView] iOS Swiping reused cell to crash

Did you verify this is a real problem by searching Stack Overflow?

Yes

Tell us about the problem

Swiping reused cell to crash

Which platform(s) does your issue occur on?

iOS

Please provide the following version numbers that your issue occurs with:

• Progress NativeScript UI version: 2.0.1

• CLI: 3.0.0

• Cross-platform modules: 3.0.0

• Runtime(s): 3.0.0

Please tell us how to recreate the issue in as much detail as possible.

1. Enable swipe to delete
2. Add a cell to RadListView x3 (by data binding)
3. Swipe delete 1st cell
4. Add a cell again to top of list
5. Swipe (4)’s cell

-> Crash (at listview.ios.js:var viewAtIndex = owner._realizedCells.get(cell.tag).view in function TKListViewDelegateImpl.prototype.listViewShouldSwipeCellAtIndexPath)

I found that the cause is cell.tag is missing in owner._realizedCells.

Because _realizedCells.set(cell.tag, cell) won’t be called when the cell is from listView.dequeueLoadOnDemandCellForIndexPath(indexPath).

For your information, I am using following workaround to add reused cell into _realizedCells and working fine.

in RadListView.prototype.prepareCell

        if (cell.view === undefined) {
            cell.view = this.getItemTemplateContent();
            this.prepareCellTag(cell);
             .
             .
+       } else {
+           this.prepareCellTag(cell);
+       }

[ginev]

Hello @kssfilo,

This was a regression from {N} 3.0 migration that we've already fixed. The fix will be included in the next update due to around mid June.

We will start publishing daily builds under the @next tag in a day and you will be able to verify the fix.
Note that these builds are the Trial version of the Pro plugin but they are not any different in functionality compared to the paid plugin.

The @next version of the Free plugin will be without a Trial watermark as expected.

[tommag21]

Sorry for commenting a closed thread, but I'm still having this issue on NativeScript-Vue.
I am populating a RadListView with async items through auto load on demand. Swiping an element below the ones loaded first causes a crash:

JS ERROR TypeError: undefined is not an object (evaluating 'owner._realizedCells.get(cell.tag).view')
NativeScript caught signal 11.

Versions:
nativescript-vue: ^2.0.0
nativescript-ui-listview: 6.3.2 (same problem with 5.1.1)
Cross-platform modules: ^5.4.2
CLI: 5.4.0
iOS runtime: 5.4.1

For now, using kssfilo's workaround is solving the problem.

[VladimirAmiorkov]

Hi @tommag21 ,

Can you share with as more details on the observed behavior. It would be best to open a new issue where you can described the issue with steps to reproduce it and a sample project showcasing it.