The ListView is designed to display items in a staggered manner rather than all at once

When utilizing nativescript-ng, the ListView does not render all items simultaneously.

I have an array containing approximately 26 items, currently just strings. Upon using tns debug ios and inspecting my Chrome browser, I noticed that only 20 items are being rendered, even though the ListView height is set to 1000. Even when adding more items, the height remains unchanged and the last item displayed is in position 20.

I am incorporating animation on the ListView's translateY property, necessitating the full height for the animation to function properly.

<GridLayout rows="auto, auto" columns="*">
  <MapView height="400" ...></MapView>
  <ListView [items]="countries" class="list-group" row="1" col="0">
   <StackLayout *ngFor="let item of countries" height="100">
      <Label [text]="item"></Label>
    </StackLayout >
  </ListView>
</GridLayout

this.countries = ["Austria", "Belgium", "Bulgaria", "Croatia", "Cyprus", "Czech Republic",
    "Denmark", "Estonia", "Finland", "France", "Germany", "Greece", "Hungary", "Ireland", "Italy",
    "Latvia", "Lithuania", "Luxembourg", "Malta", "Netherlands", "Poland", "Portugal", "Romania", "Slovakia",
    "Slovenia", "Spain", "Sweden", "United Kingdom"];

expected: The ListView height should be the total sum of all its children's heights. In this case, approximately 2600.

actual: The ListView height is restricted to 1000.

angulartypescriptnativescript-angular

Answer №1

After conducting tests on IOS, I was able to reproduce the issue. When I modified the row height from * to auto in the GridLayout, the ListView automatically navigated to the end of the list.

The Auto attribute dynamically adjusts the space based on content, indicating that not all elements are loaded during page construction. Therefore, although all items are present, the ListView's height is limited due to constraints.

<GridLayout rows="auto, *" columns="*">
...
</GridLayout>

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