I have a list of data and when it renders, it's rendering on top of each other. The data is a fairly long list of objects and I am using multiple fields. I made a playground example by reducing the data list size and only using field (display_name) and it's still happening.
It seems to happen in random spots of the list but I am unsure as to how to resolve or more importantly, why it's happening. I thought it may have had to do with my key not being unique but I made sure it was and it's still happening. I included a playground and added screenshots. Any ideas?
Playground
Screenshots
EDIT: (Adding Template)
<RadListView
for="(movie,index) in this.movies"
ref="listView"
#loaded="onListLoaded($event)"
#itemTap="onItemTap($event)"
itemHeight="50"
:key="index"
gridSpanCount=1
>
<v-template>
<FlexboxLayout class="item-row" :key='`flex` + index' flexDirection="row" width="100%" height="100%" justifyContent="space-between">
<Stacklayout orientation="horizontal">
<Image :key='`img-flag` + index' marginTop="-22" class="flag-image" marginBottom="-22" :src="movie.image" height="100%" />
<Label :key='`display-name` + index' :text="movie.display_name" />
</Stacklayout>
<Image :key='`heart-1` + index' #tap="handleToggleFavorite(movie)" width="20" :src="movie.favorite ? heartFilled : heartUnfilled" />
</FlexboxLayout>
</v-template>
</RadListView>
Looking at your mockup, I think you can achieve it with a simple GridLayout.
<v-template>
<GridLayout columns="auto,*,auto" class="list-group-item">
<Image col="0" :src="movie.image"
class="m-5 thumb img-circle">
</Image>
<Label col="1" :text="movie.display_name"></Label>
<Image col="2" src="path_to_icon" class="thumb">
</Image>
</GridLayout>
</v-template>
Related
im getting below error while i'm iterate CartItem.
Property or method "item" is
not defined on the instance but referenced during render. Make sure that this property is reactive, either in the data option, or for class-based components, by initializing the property
why this error is showing and how can i solve this.
[Note : this is a nativescript vue project]
<ListView
v-for="(item, index) in cartItems"
:key="index"
height="1000"
class="listCard"
>
<v-template>
<GridLayout
rows="auto"
columns="auto,*3,auto"
backgroundColor="white"
class="innerList"
>
<StackLayout orientation="horizontal" col="0" row="0">
<Button>
<FormattedString>
<Label
class="fa fas"
:text="'fa-trash' | fonticon"
fontSize="30"
></Label>
</FormattedString>
</Button>
<Image :src="item.imageUrl" height="80" width="auto"></Image>
</StackLayout>
<StackLayout col="1" row="0">
<Label
:text="item.title"
textWrap="true"
class="font-weight-bold"
color="#333333"
></Label>
<Label :text="item.color" color="#999999"></Label>
<Label :text="'USD ' + item.price" color="red"></Label>
</StackLayout>
<StackLayout orientation="horizontal" col="2" row="0">
<Button
text="-"
#tap="onDecriment(index)"
class="operatorButton operatorBox"
marginRight="0"
/>
<Label
class="operatorLabel operatorBox"
:text="item.quantity">
</Label>
<Button
text="+"
#tap="onIncrement(index)"
class="operatorButton operatorBox"
marginLeft="0"
/>
</StackLayout>
</GridLayout>
</v-template>
</ListView>
I don't see any error in your code but can you try using for instead of v-for. I see in this example, Listview is being using with for.
As per docs: If a v-for is used on a <ListView> a warning will be printed to the console, and it will be converted to the **for** property. you can read more about Listview with for here
<ListView
for="(item, index) in cartItems"
:key="index"
height="1000"
class="listCard"
>
....
I hope you can help me to solve my problem.
I am working on a Nativescript-Vue Application and I want to render this conditionally:
<Label if="isRendering" text="This is a text"></Label>
But this does not work.
I already tried it with <v-template if="..."></v-template> but this also does not work.
If i am not mistaken, in Vue.js it is possible to render conditionally with v-if and i am searching for a possibility to make it in Nativescript-Vue.
Thank you
It's the same like in Vue.js.
Instead of using if you should be using v-if.
Playground example
Example:
<Label v-if="isRendering" text="This is a text"></Label>
But if you want to use an if in a ListView it's different.
Example:
<ListView for="item in listOfItems" #itemTap="onItemTap">
<v-template>
<Label :text="item.text" />
</v-template>
<v-template if="$odd">
<!-- For items with an odd index, shows the label in red. -->
<Label :text="item.text" color="red" />
</v-template>
</ListView>
But more info about that in the docs
The listview is so slow when scrolling. It hits the bottom and bounces like it has run out of items to display. If you retry, it lets you scroll further. The same thing happens on the way back up the list.
I load in my array of only 40 items using a vuex getter.
computed: {
history () {
return this.$store.getters.allHistory;
}
},
Then the ListView is simply
<ListView ref="listView" for="item in history">
<v-template>
<StackLayout height="60" padding="10">
<Label :text="item.title" textWrap="true"></Label>
</StackLayout>/>
</v-template>
</ListView>
Removing the fixed height and padding seemed to fix. This is working...
<ListView ref="listView" for="item in history">
<v-template>
<GridLayout columns="auto,*" rows="auto, auto" margin="10">
<Image v-show="item.poster_url.length > 0" :src="item.poster_url" marginRight="5"
stretch="aspectFill" height="100" borderRadius="5"></Image>
<StackLayout col="1" row="0" rowSpan="2">
<Label :text="item.title" textWrap="true"></Label>
</StackLayout>
</GridLayout>
</v-template>
</ListView>
Here's the code for the GridView Control that I'm using (made on BlankPage App):
<GridView HorizontalAlignment="Left" x:Name="gridView1" Margin="227,220,0,53" Width="1087">
<Button x:Name="XboxButton" Margin="10,10,10,10" Style="{StaticResource XboxButton}" Height="200" Click="SnappedXboxButton_Click_1"/>
<Button x:Name="PS3Button" Margin="10,10,10,10" Style="{StaticResource PS3Button}" Click="SnappedPS3Button_Click_1" />
<Button x:Name="PCButton" Margin="10,10,10,10" Style="{StaticResource PCButton}" Click="SnappedPCButton_Click_1" />
<Button x:Name="DSButton" Margin="10,10,10,10" Style="{StaticResource DSButton}" Click="SnappedDSButton_Click_1" />
<Button x:Name="PSPButton" Margin="10,10,10,10" Style="{StaticResource PSPButton}" Click="SnappedPSPButton_Click_1" />
<Button x:Name="ContactButton1" Margin="10,10,10,10" Style="{StaticResource ContactButton}" Click="SnappedContactButton_Click_1" />
<Button x:Name="PrivacyButton" Margin="10,10,10,10" Style="{StaticResource DisclaimerButton}" Click="SnappedPrivacyButton_Click_1"/>
</GridView>
The problem is when the app first loads it shows the GridView is shown like this:
(Please go here, since, I'm new, I'm not allowed to post images)
http://social.msdn.microsoft.com/Forums/getfile/189014
But when I click any item and GO BACK to the first page the render is fine as shown in this image:
http://social.msdn.microsoft.com/Forums/getfile/189015
Improve tour markup.
1. In the GridView define a style resource for buttons, or in app resources create a base style and then use it in each button style using BasedOn={StaticResource binding notation
2. Set the margin,width,height , as I see all buttons have same property values
3. Id you don't want GridView set width or height values automaticly, ensure you set the values in the styles
I have several command on my appbar. I want to align two of them to the left. How would I do it?
I am using Html5/JS
Basically How do you do this in HTML5/JS?
<Page.BottomAppBar>
<AppBar x:Name="bottomAppBar" Padding="10,0,10,0">
<Grid>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Left">
<Button Style="{StaticResource EditAppBarButtonStyle}" Click="Button_Click"/>
<Button Style="{StaticResource RemoveAppBarButtonStyle}" Click="Button_Click"/>
<Button Style="{StaticResource AddAppBarButtonStyle}" Click="Button_Click"/>
</StackPanel>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
<Button Style="{StaticResource RefreshAppBarButtonStyle}" Click="Button_Click"/>
<Button Style="{StaticResource HelpAppBarButtonStyle}" Click="Button_Click"/>
</StackPanel>
</Grid>
</AppBar>
</Page.BottomAppBar>
See the example's below, section:'global' will align the element to right and section:'selection' will align the element to the left.
To align button to the right
<button id="mybutton2"
data-win-control=
"WinJS.UI.AppBarCommand"
data-win-options="{label:'Delete',
icon:'delete',
section:'global',
tooltip:'Delete item'}">
</button>
To align button's to the left
<button id="mybutton3"
data-win-control=
"WinJS.UI.AppBarCommand"
data-win-options="{id:'cmdCamera',
label:'Camera',
icon:'camera',
section:'selection',
tooltip:'Take a picture'}">
</button>
Sincel global is deprecated, I could not figure out how to align command buttons from left to right. The only solution I found is, add extra buttons and remove their label and icon.
I know this is ugly but had to find a work around and this is the one I had to choose.
<div class="toolbar" data-win-control="WinJS.UI.ToolBar">
<!-- Primary commands -->
<button data-win-control="WinJS.UI.Command" data-win-options="{
id:'cmdMentions',
label:'Mentions',
type:'button',
icon: 'accounts'
}"></button>
<button data-win-control="WinJS.UI.Command" data-win-options="{
id:'cmdBlocked',
label:'Blocked Accounts',
type:'button',
icon: 'blockcontact'
}"></button>
<button data-win-control="WinJS.UI.Command" data-win-options="{
id:'cmdConfig',
label:'Configuration',
icon: 'edit'
}"></button>
<button data-win-control="WinJS.UI.Command" data-win-options="{
id:'cmdConfig1'
}"></button>
<button data-win-control="WinJS.UI.Command" data-win-options="{
id:'cmdConfig2'
}"></button>
<button data-win-control="WinJS.UI.Command" data-win-options="{
id:'cmdConfig3'
}"></button>
<button data-win-control="WinJS.UI.Command" data-win-options="{
id:'cmdConfig4'
}"></button>
</div>
Just setting it via CSS works fine.
HTML:
<button data-win-control="WinJS.UI.AppBarCommand" data-win-options="{id:'cmdEdit',label:'Edit',icon:'edit'}"></button>
CSS:
#cmdEdit{
position:absolute;
left:50px;
}
Here is a great sample from CodeShow. This works perfectly.
<button
data-win-control="WinJS.UI.AppBarCommand"
data-win-options="{id:'cmdAdd',label:'Add',icon:'add', section:'global',tooltip:'Add item'}"></button>
<button
data-win-control="WinJS.UI.AppBarCommand"
data-win-options="{id:'cmdRemove',label:'Remove',icon:'remove', section:'global',tooltip:'Remove item'}"
onclick="appbar2.remove()"></button>
<hr />
data-win-control="WinJS.UI.AppBarCommand"
data-win-options="{type:'separator',section:'global'}" />
<button
data-win-control="WinJS.UI.AppBarCommand"
data-win-options="{id:'cmdDelete',label:'Delete',icon:'delete', section:'global',tooltip:'Delete item'}"></button>
<button
data-win-control="WinJS.UI.AppBarCommand"
data-win-options="{id:'cmdCamera',label:'Camera',icon:'camera', section:'selection',tooltip:'Take a picture'}"></button>