feat(ios): add direction to ListView scrolling

[m1ga]

iOS currently only adds direction in the scrolling event when you release the finger. This PR adds it to the continuous scrolling (old PR)

var toggle = false;
var sections = [];
const win = Ti.UI.createWindow();
const btn = Ti.UI.createButton({
    title: "change",
    bottom: 20
});
const lbl = Ti.UI.createLabel({
    top: 10,
    right: 10,
    width: Ti.UI.SIZE,
    height: Ti.UI.SIZE
})
const listView = Ti.UI.createListView({
    height: Ti.UI.FILL,
    width: Ti.UI.FILL,
    continuousUpdate: true,
  forceUpdates: false
});

btn.addEventListener("click", function() {
    toggle = !toggle;
    listView.forceUpdates = toggle
    console.log(listView.forceUpdates);
})

for (var s = 0; s < 5; s++) {
    var section = Ti.UI.createListSection({
        headerTitle: 'Section ' + s
    });
    var set = [];
    for (var i = 0; i < 20; ++i) {
        set.push({
            properties: {
                title: 'Item 0 ' + i
            }
        })
    }
    section.setItems(set);
    sections.push(section);
}

listView.sections = sections;
win.add([listView, btn, lbl]);

listView.addEventListener("scrolling", function(e) {
    lbl.text = "Item: " + e.firstVisibleItemIndex + " section:" + e.firstVisibleSectionIndex;
    console.log("Item", e.direction, e.firstVisibleItemIndex, e.firstVisibleSectionIndex, e.top);
})
win.open();

https://github.com/user-attachments/assets/f5c36153-0ef1-4e90-a21c-f4a1d121b75b

[hansemannn]

Are there API docs for this already?

[m1ga]

yes, since 5.4.0 https://github.com/tidev/titanium-sdk/blob/master/apidoc/Titanium/UI/ListView.yml#L648-L652 With a note On iOS no event is fired when the finger is not released. With continuousUpdate event you've got it more often but the direction was not yet in there. That was still only fired after touching the screen.

[hansemannn]

@m1ga The recent changes should fix that - are you okay with these?

[m1ga]

Looking good, code still works fine, thanks :+1: