iOS buttons become unclickable after making a floating layout - nativescript

I'm creating a custom action bar and my idea is that the actionbar must be transparent (thats why I can't/don't want to use the native one) and behind the action bar there must be content (an image in this case).
I tried multiple ways and all of them with the same result, the iOS button become unclickable for no reason.
Ok, so I have an AbsoluteLayout inside I have GridLayout fixed on top as the custom actionbar and then a ScrollView with 100% width and height, inside the scrollview there's some content. The problem is as soon as I put a button inside the GridLayout this become unclickable only on iOS because in Android works just fine.
Let me show you my example with some code:
<Page actionBarHidden="true">
<AbsoluteLayout>
<GridLayout rows="50, *" backgroundColor="red" top="0" left="0" height="50" id="bar">
<Button text="click" #tap="goToDetailPage" id="buttondelsous"></Button>
</GridLayout>
<ScrollView backgroundColor="blue" width="100%" height="100%" top="0" id="content">
<WrapLayout>
<StackLayout>
<Label text="this is behind"></Label>
</StackLayout>
</WrapLayout>
</ScrollView>
</AbsoluteLayout>
</Page>
As for the styles forcing the custom actionbar being in front of the scrollview I have:
#bar {
z-index: 5;
width: 100%;
}
#content {
z-index: 2;
}
This looks like this on Android:
Same way on iOS but the button "Click" is not working, like if it was behind something..
Any idea on how to fix this or any other approach to get what I need? Remember behind the action I must be able to place content (like a background image that I don't want to place in the Page tag itself but in another layout)
Thanks!

A wise man once told me that Nativescript stacks elements in the order you list them. Try flipping around the order so the button is listed last in the template. I believe you won't even need the z-index line if you flip the order around.
should look like
<Page actionBarHidden="true">
<AbsoluteLayout>
<ScrollView backgroundColor="blue" width="100%" height="100%" top="0" id="content">
<WrapLayout>
<StackLayout>
<Label text="this is behind"></Label>
</StackLayout>
</WrapLayout>
</ScrollView>
<!-- I'm listed second so I will be on top even though I have row="0" -->
<GridLayout rows="50, *" backgroundColor="red" top="0" left="0" height="50" id="bar">
<Button text="click" #tap="goToDetailPage" id="buttondelsous"/>
</GridLayout>
</AbsoluteLayout>
</Page>

Related

Nativescript ScrollView not showing on ios

I have AbsoluteLayout in ScrollView with pager and custom components inside Pager. The code is working on Android, but on iOS is nothing shown. Does anyone have some solution?
<ScrollView>
<AbsoluteLayout>
<Pager row="1" #pager [selectedIndex]="currentPagerIndex" width="100%">
<ns-dashboard-profile height="100" *pagerItem></ns-dashboard-profile>
<ns-dashboard-home *pagerItem></ns-dashboard-home>
<ns-dashboard-devices *pagerItem></ns-dashboard-devices>
</Pager>
<FlexboxLayout class="navigation-wrapper" top="230">
<Label text="Profil" (tap)="goToPage('profile')" class="profile-tab"></Label>
<Label text="Početna" (tap)="goToPage('home')" class="home-tab"></Label>
<Label text="Moji uređaji" (tap)="goToPage('devices')" class="my-device-tab"></Label>
</FlexboxLayout>
</AbsoluteLayout>
ScrollView closing tag is not shown in the code snippet.

How to vertically fill space between elements in ScrollView while preserving scrolling

I am trying to achieve the following:
I tried achieving this with a GridLayout and only get one of the following two things working:
The space between the Label and the StackLayout is filled (label is
stretched), but scrolling will not work when adding more labels into
the StackLayout
Scrolling will work when more labels are added into
the StackLayout, but when only one label is showed for example, the
label before the StackLayout will not stretch
Is there any way to achieve such a thing? GridLayout is not necessarily needed, but I tried several ways and could not find any way of doing this.
example code of (1)
<Page class="page dark">
<ScrollView backgroundColor="red">
<GridLayout rows="*, auto" height="100%" backgroundColor="blue">
<Label backgroundColor="green">Top Label</Label>
<StackLayout row="1" backgroundColor="green">
<Label backgroundColor="purple">Label A</Label>
<Label backgroundColor="purple">Label B</Label>
</StackLayout>
</GridLayout>
</ScrollView>
</Page>
example code of (2):
<Page class="page dark">
<ScrollView backgroundColor="red">
<GridLayout rows="*, auto" backgroundColor="blue">
<Label backgroundColor="green">Top Label</Label>
<StackLayout row="1" backgroundColor="green">
<Label backgroundColor="purple">Label A</Label>
<Label backgroundColor="purple">Label B</Label>
</StackLayout>
</GridLayout>
</ScrollView>
</Page>
I wanted to achieve this for months and I finally found a working solution, for iOS and Android.
The solution is to use FlexboxLayout instead of GridLayout. When placed in a ScrollView, FlexboxLayout will take the whole available height if it is not tall enough. If it is taller than the ScrollView, it will be scrollable.
Here is the solution for your example:
<Page class="page dark">
<ScrollView backgroundColor="red">
<FlexboxLayout
flexDirection="column"
justifyContent="space-between"
alignItems="stretch"
backgroundColor="blue"
>
<Label backgroundColor="green">Top Label</Label>
<StackLayout backgroundColor="green">
<Label backgroundColor="purple">Label A</Label>
<Label backgroundColor="purple">Label B</Label>
</StackLayout>
</FlexboxLayout>
</ScrollView>
</Page>

GridLayout in ScrollView - NativeScript

I am new to NativeScript. I have 4 images in my page and I want to achieve this.
Except I want my cover image to be of full-height of the screen. This is the code I'm trying.
<ScrollView>
<StackLayout height="100%" width="100%">
<GridLayout columns="*, *" rows="5*, *, *">
<StackLayout
:row="0"
:col="0"
:colSpan="2"
class="bgImage coverImage"
:style="{backgroundImage:`url('${defaultImg}')`}"
></StackLayout>
<StackLayout
:row="calcRow(idx)"
:col="calcCol(idx)"
:colSpan="idx==0?2:1"
v-for="(item,idx) in event.imgs"
:key="idx"
class="bgImage eventImage"
:style="{backgroundImage:`url('${item}')`}"
></StackLayout>
</GridLayout>
</StackLayout>
</ScrollView>
If I didn't give height="100%" to StackLayout it's not even loading the images. If I do give it then there is no scroll.
Here is the playground link Playground Link
You may use the layoutChanged event of your ScrollView where you may calculate the height of it and use it as height for the first image.
Playground Sample

How to position element at the bottom of Absolute Layout in NativeScript?

I want to position an element at the bottom of the screen in Absolute Layout in NativeScript.
I have this code:
<AbsoluteLayout>
<maps:mapView
left="0"
top="0"
width="100%"
height="100%"
latitude="{{ map.latitude }}"
longitude="{{ map.longitude }}"
zoom="{{ map.zoom }}"
padding="{{ map.padding }}"
mapReady="onMapReady"
coordinateTapped="onCoordinateTapped"
markerSelect="onMarkerSelect"
shapeSelect="onShapeSelect"
cameraChanged="onMapCameraChanged"/>
<ScrollView
left="0"
top="0"
width="100%"
orientation="horizontal">
<!-- More XML -->
</ScrollView>
<StackLayout
left="0"
bottom="0"
width="100%"
visibility="visible"
orientation="horizontal"
style="background-color: red;">
<Label text="TITLE"></Label>
</StackLayout>
</AbsoluteLayout>
I figured out that there is no bottom attribute for AbsoluteLayout... Here is the picture of what I want to create:
So how to arange items like in the picture, especially the bottom one?
EDIT: I should note that dimensions of this bottom rectangle may not be always same....
I did something similar one day, programmatically & with Angular, maybe this can help.
If you don't want to use a GridLayout you can try to get height of your bottom element and of the screen, then place your element from the top with a simple calcul : screen's height - bottom element's height (- more if you want some padding). You can use two types of values : DIPs and pixels. If you're using pixels, you need to convert your values into DIPs by using the screen scale.
Something like this (I didn't test the code I'm giving you, it's just an example) :
1] add an id to your bottom element so you can access it inside your component :
<StackLayout #bottomElt></StackLayout>
2] update your component to set element position inside your absolute layout
// you need ElementRef, OnInit and ViewChild
import { Component, ElementRef, OnInit, ViewChild, ViewContainerRef } from "#angular/core";
import { AbsoluteLayout } from "ui/layouts/absolute-layout";
import { StackLayout } from "ui/layouts/stack-layout";
// you need access to screen properties
import { screen } from "tns-core-modules/platform";
[...]
export class YourComponent implements OnInit {
// add access to element inside your component
#ViewChild("bottomElt") bottomElt: ElementRef;
// create variable to access bottom element properties
bottomContainer: StackLayout;
// set bottom element position after view init
// example : inside ngOnInit function (for Angular version)
ngOnInit(): void {
this.bottomContainer = <StackLayout>this.bottomElt.nativeElement;
// using DIPs values only
AbsoluteLayout.setTop(this.bottomContainer, (screen.mainScreen.heightDIPs - Number(this.bottomContainer.height)));
// using pixels and screen scale
// this way you can get height without knowing it
AbsoluteLayout.setTop(this.bottomContainer, (screen.mainScreen.heightDIPs - (Number(this.bottomContainer.getMeasuredHeight()) / screen.mainScreen.scale)));
}
More information about screen values : https://docs.nativescript.org/api-reference/interfaces/platform.screenmetrics.html
Alternative way
Instead of using AbsoluteLayout, you can use a GridLayout to set a bottom bar, with two rows : one with a wildcard size and the other with auto size so it can fit your bottom bar height everytime it changes. I did it this way in a mobile application to get a menu at the bottom in Android and IOS :
<GridLayout rows="*, auto" width="100%">
<AbsoluteLayout row="0" orientation="vertical">
<!-- YOUR CONTENT (maps & ScrollView) -->
</AbsoluteLayout>
<!-- YOUR BOTTOM BAR (StackLayout). Don't forget to add row="1" -->
<StackLayout #bottomElt row="1">[...]</StackLayout>
</GridLayout>
Another option is using FlexboxLayout in your AbsoluteLayout container like this:
<FlexboxLayout flexDirection="column" justifyContent="space-between" height="100%">
<ScrollView
width="100%"
orientation="horizontal">
<!-- More XML -->
</ScrollView>
<StackLayout
width="100%"
visibility="visible"
orientation="horizontal"
style="background-color: red;">
<Label text="TITLE"></Label>
</StackLayout>
</FlexboxLayout>
This is the absolute best solution, got it from one of the devs: https://github.com/NativeScript/NativeScript/issues/5591#issuecomment-482640921
<GridLayout rows="*,auto">
<ItemTakingFullScreen rowSpan="2"/>
<ItemShownUnder row="1"/>
<ItemShownAbove row="1">
</GridLayout>
Basically, you can use grid layout and have a item take up multiple grid spaces, sharing them with some other item.
here is the best solution
wrapper all the elements in an absolutelayout with width and hieght to 100% and maybe add a gridlayout to hold the main content .
<AbsoluteLayout width='100%' height='100%'>
<StackLayout width='100%' hieght='100%' left='0' top='0'>
//add you structure here
</StackLayout>
add your fixed element here
<image src='add the float item'/>
</AbsoluteLayout>
It can be done also with GridLayout:
<GridLayout rows="16,*,16" columns="16,*,16" width="100%" backgroundColor="red">
<GridLayout row="1" col="1" rows="auto, auto, auto" columns="auto" horizontalAlignment="right" verticalAlignment="bottom" backgroundColor="blue">
<!-- Your content at bottom right corner -->
<Label row="0" text="Your content" textAlignment="center" textWrap="true"></Label>
<Label row="1" text="at" textAlignment="center" textWrap="true"></Label>
<Label row="2" text="bottom right corner" textAlignment="center"></Label>
</GridLayout>
</GridLayout>
This is the easy way
<DockLayout backgroundColor="lightgray" stretchLastChild="true">
<Label text="top" dock="top" height="60" backgroundColor="green">
</Label>
<Label text="bottom" dock="bottom" height="60" backgroundColor="yellow"></Label>
<Label text="center" backgroundColor="red"></Label>
</DockLayout>
This is what you want!
<DockLayout backgroundColor="lightgray" stretchLastChild="false">
<Label text="top" dock="top" height="60" backgroundColor="green">
</Label>
<Label text="bottom" dock="bottom" height="60" backgroundColor="yellow"></Label>
</DockLayout>

Hover effect on StackLayout

I trying to do a buttonImage with text, but failed. After that I using another method to show out, it look nice but left hover effect, isn't possible add hover into stacklayout?
<StackLayout tap="tapevent" col="1" row="0" horizontalAlignment="center" cssClass="padding-list" tap="jl">
<Image src="~/images/drawable-xhdpi-v4/basketball.png" />
<Label text="abc" cssClass="text-align-center" />
</StackLayout>
I try using :pressed and :hover in css but also not take any effect.
Adding a background-image on the button, can happen in the CSS file the following way:
button {
background-image: url("~/background.jpg");
}
About the :hover pseudo selector, it will be great if you can add your input in the discussion in GitHub.

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