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How to scroll down to a specific index of a list contained in a Scrollview ? (Nativescript-vue)


By : user2175863
Date : October 14 2020, 02:24 PM
With these it helps It's a mistake to wrap ListView within ScrollView as ListView itself is scrollable. You may use scrollToIndex on RadListView to scroll down / up to specific index.
code :
// Scrolls to 50th index
listView.scrollToIndex(50);


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Scroll UIPageViewController when contained scrollview is zoomed, like Apple's PhotoScroller example


By : Kamusiime Ambrose
Date : March 29 2020, 07:55 AM
I wish did fix the issue. In the apple PhotoScroller example, 3 zoomable images are displayed in a UIPageViewController. You can zoom these images and page between them even when they are still zoomed. My application uses the code from the PhotoScroller with the only difference being that my UIPageViewController is a child view controller of another UIViewController in my app - i.e. the paging functionality is contained within a view hierarchy. In Apple's version, the UIPageViewController is the root view controller (set up by a storyboard actually). In my code, I do not get the paging behavior unless I return the content to it's un-zoomed scale. For my app I don't want to force the user to do this. What do I need to do to get this working the way I want to? , UIPageViewController must be initiated properly, as
code :
        _pageViewController =  [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options:nil];

NativeScript ScrollView when component open it will scroll to some section


By : UrSalem Banna
Date : March 29 2020, 07:55 AM
Hope that helps im using ScrollView in my component like that , Use scrollView.scrollToHorizontalOffset(position);

Nativescript scroll to bottom of ScrollView programmatically


By : MIKE KRAUTSTRUNK
Date : March 29 2020, 07:55 AM
To fix this issue you are setting TextView to fixed height 100% which is will be same as ScrollView that is why scrollableHeight will always be 0. you should use minHeight="100%".
then you can scroll programmatically to the end when you are appending text to terminal text this.terminalText += appendStr.
code :
public appendToTerminal(appendStr){
    this.terminalText += appendStr;
    setTimeout(()=>{
        scrollView.scrollToVerticalOffset(scrollView.scrollableHeight, false);

    },150);
}

ScrollView doesn't scroll in NativeScript


By : David
Date : March 29 2020, 07:55 AM
this one helps. I have updated the playground for you here. You have given height for the StackLayout in class and that is the culprit here.
code :
.pageBackground{
    background-image: url('https://backgroundtown.com/content/images/thumbs/0002610_classic-texture-dark-cool-gray.jpeg');
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    /* height: 100% */
}

.main-container{
    /* height: 100%; */
    width: 100%;
    /* overflow-y: scroll; */
}

Nativescript + Angular ScrollView scroll to the end listener


By : idan sh
Date : March 29 2020, 07:55 AM
seems to work fine You could still listen to scroll event and see whether the current verticalOffset is equal to location of last component in your ScrollView.
Something like,
code :
 // Attached to layoutChange event of your container element inside scroll view
 onLayoutChanged(event: EventData) {
    const containerLyt = <StackLayout>event.object,
        length = containerLyt.getChildrenCount(),
        lastItem = containerLyt.getChildAt(length - 1);

    this.lastItemY = lastItem.getLocationRelativeTo(containerLyt).y;
}

onScroll(event: EventData) {
    const scrollView = <ScrollView>event.object,
        verticalOffset = scrollView.getActualSize().height + scrollView.verticalOffset;

    if (verticalOffset >= this.lastItemY) {
        console.log("Reached end of scroll");
    }
}
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