loadMoreItems is called on ListViews items initialization

[enchev]

From @qpautrat on April 20, 2015 9:6

Hi there,

Considering following code:

exports.pageLoaded = function(args) {
    console.log("pageLoaded");

    var page = args.object;

    page.bindingContext = {'items':[{'name':'Foo'},{'name':'Bar'}]};
};

exports.loadMoreItems = function(data) {
    console.log("loadMoreItems");
}

and this view:

<Page xmlns="http://www.nativescript.org/tns.xsd" loaded="pageLoaded">
    <ListView items="{{ items }}" loadMoreItems="loadMoreItems">
        <ListView.itemTemplate>
            <Label text="{{ name }}" />
        </ListView.itemTemplate>
    </ListView>
</Page>

I get:

Apr 20 09:49:28: /app/test.js:3:16: CONSOLE LOG pageLoaded
Apr 20 09:49:28: /app/test.js:11:16: CONSOLE LOG loadMoreItems

However if my items is empty loadMoreItems is not called like it should be.

Copied from original issue: NativeScript/cross-platform-modules#294

[enchev]

Generally loadMoreItems will be called when you scroll ListView to the bottom and when you do not have items you do not have scroll as well.

[enchev]

From @qpautrat on April 21, 2015 7:3

Hi @enchev,

I was not specific enough my bad. This happen when i do nothing, no scroll.

[Epotignano]

+1 for this problem

[JuanDelgadillo]

+1 Any solution for this problem?

[NickIliev]

Hey @JuanDelgadillo

In case you do not have initial items loaded you won't need loadMoreItem event. Instead just initialize your initial items collection.

[tylerdoll]

Did anyone come up with a viable solution for this? I am experiencing this issue too when I dynamically load in items. It loads <=10 items on the first go, then for what ever reason it loads more even though I did not scroll and am not anywhere near the bottom of the ListView.

I'm taking a stab in the dark here but maybe it's an issue with the rendering of the list? Meaning if it renders each item one by one (which I don't know if it does), I guess at one point it would think it's near the bottom when the first one or two items are loaded?

[alexziskind1]

I confirmed that this is still an issue. If you have a very large array that you're loading from a service using paging (adding 10 items at a time and adding to the existing list on the client side), loadMoreItems is called continuously.

[mzaka]

+1,

LoadMoreItems runs automatically whenever items are initiated. Which should not be the behaviour.

[lock]

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