<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="StackStuff.MainPage">
<StackLayout Orientation="Vertical">
<Image Source="image.jpg" VerticalOptions="Fill" HorizontalOptions="Fill"/>
</StackLayout>
</ContentPage>
I have a Xamarin.Forms project where I want an image to resize inside a StackLayout. I stripped it down to the minimal code above and if I resize the window, the image will only resize based off the window width. i.e. the image gets clipped off the bottom of the window if I change the height.
If I change the StackLayout's Orientation to Horizontal, I get the opposite - it'll resize based off a changing height, but not width.
If I completely remove the StackLayout and have only the image on the page, then the entire image will always be visible which is the behaviour I expected when it's inside the StackLayout.
Can anyone explain why this is? If I replace the Image with a BoxView, it'll happily resize and stay within the bounds of the StackLayout.
Thanks.
I solved this by wrapping the image in a grid:
<StackLayouenter code heret Orientation="Vertical">
<Grid>
<Image Source="image.jpg" VerticalOptions="Fill" HorizontalOptions="Fill"/>
</Grid>
</StackLayout>
I have no idea why it works but I guess that's Xamarin.Forms for you.
Related
is it possible to round the corners of the XCT popup?
I tried to set the BackgroundColor to transparent, and to set the body in a frame with the option CornerRadius - but this does not work as desired.
Does anyone have a tip on how to round the corners?
<xct:Popup xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="CashTracker.Views.ImagePopup"
xmlns:viewmodels="clr-namespace:CashTracker.ViewModels"
xmlns:xct="clr-namespace:Xamarin.CommunityToolkit.UI.Views;assembly=Xamarin.CommunityToolkit"
Size="300,400"
BackgroundColor="Transparent">
<Frame CornerRadius="20" HasShadow="True">
<StackLayout>
<Label Text="Aufgenommenes Foto" FontSize="Medium" HorizontalOptions="Center"/>
<Image x:Name="PopupImageSource"/>
</StackLayout>
</Frame>
</xct:Popup>
Xamarin XCT Popup
The popup should look like this - only without the white corners.
Xamarin Popup Frame
Somehow BackgroundColor was not working for Popup. Hence use the Color propperty for setting color of the Popup.
If you are using Frame in your layout, you can use Frame's CornerRadius for rounded corners (only if you are using Frame).
If you are not using Frame then you can use Xamarin Community Toolkit's CornerRadiusEffect.CornerRadius to set CornerRadius for any Layout, View or Control.
Hence for your question, it can be done by setting Popup's color as Transparent and your content's parent element must have property for corner radius and must have BackgroundColor set to White or any other Color as your Popup`s color is Transparent.
Here's the XAML
<xct:Popup ...
xmlns:xct="clr-namespace:Xamarin.CommunityToolkit.UI.Views;assembly=Xamarin.CommunityToolkit"
Size="300,400"
Color="Transparent">
<Frame CornerRadius="20" HasShadow="True">
<StackLayout>
<Label Text="Aufgenommenes Foto" FontSize="Medium" HorizontalOptions="Center"/>
</StackLayout>
</Frame>
//OR, if you don't need Frame then,
<StackLayout BackgroundColor="White" xct:CornerRadiusEffect.CornerRadius="10">
<Label Text="Aufgenommenes Foto" FontSize="Medium" HorizontalOptions="Center"/>
</StackLayout>
</xct:Popup>
There are lot of bugs in Xamarin Community Toolkit controls and views, we need to have some work-around for every control. Be it XCT's Popup, TabView, or extensions such as CornerRadius, ShadowEffect, TouchEffects, NativeAnimations, etc. The Community can't provide a single control without any bugs. But still, there are lots of useful features in XCT, hence we can only hope that the bugs are fixed, although the focus of fixing bugs if moved on to MAUI's Community Toolkit, until then we can use some work-arounds till stable and useful version of MAUI is released (considering its current status while writing this answer).
I have the need for a scrollview on top of a background image. I found a number of recommendations to use a , making the image the first element. What I end up with is:
<ContentPage>
<ContentPage.Content>
<RelativeLayout Padding="0">
<Image Aspect="AspectFill" Source="Background" />
<ScrollView>
<!-- Various components -->
</ScrollView>
</RelativeLayout>
</ContentPage.Content>
</ContentPage>
Using the above, I get a screen that looks correct, but the ScrollView doesn't scroll.
Am I missing something? Or does anyone have an alternative to the layout above? The background needs to be fixed and not scroll with the other elements on "top" of it.
It turns out there is a way to do this such that the two main requirements (fixed background, scrollable elements) are met.
Instead of using RelativeLayout, use a Grid. The following layout works as needed...
<ContentPage>
<ContentPage.Content>
<!-- Use a Grid, rather than a RelativeLayout -->
<Grid Padding="0">
<Image Aspect="AspectFill" Source="Background" />
<ScrollView>
<!-- Various components -->
</ScrollView>
</Grid>
</ContentPage.Content>
</ContentPage>
I have a grid that contains many collection views with horizontal scrolling. I want to add vertical scroll because later views can not see. How Can I design? Which controls should I use for it?
You could put the Grid in a ScrollView
<ScrollView Orientation="Vertical" VerticalOptions="FillAndExpand" HorizontalOptions="FillAndExpand">
<Grid>
//...
</Grid>
</ScrollView>
contains many collection
In addition, If the content of Grid is similar , you could also put them in a ListView .
I find that with xamarin.forms shell. the scrollview will automatically margin to the top,and I cannot change it.Is there any way to change it?
I have tried many solutions and searched ,but there is no one can solve it .
It seems that It will auto margin for the titlebar(actionbar).I've already hide the navigation bar.
No matter Specify the Height or the x,y position it is not work.
<ContentPage.Content>
<StackLayout>
<ScrollView>
<Image Source="a.png" VerticalOptions="StartAndExpand" />
</ScrollView>
</StackLayout>
</ContentPage.Content>
enter image description here
I want to Make the Image up to the top and do not leave white space.
The part where you have the white space is called the Safe Area
By default, Xamarin Forms does not use the safe area.
But if you want to use it any way it can be done something like this:
On<Xamarin.Forms.PlatformConfiguration.iOS>().SetUseSafeArea(true);
Also, add the following using Statement using Xamarin.Forms.PlatformConfiguration.iOSSpecific;
The same can be done via XAML something like this on your ContentPage:
<?xml version="1.0" encoding="UTF-8"?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:ios="clr-namespace:Xamarin.Forms.PlatformConfiguration.iOSSpecific;assembly=Xamarin.Forms.Core"
ios:Page.UseSafeArea="true" >
For a detailed understanding of how this works, you can check this blog by Xamarin
I am trying to resize an ActivityIndicator (in Xamarin.Forms), but the Scale property does not work and the HeightRequest just crops the ActivityIndicator.
<StackLayout>
<ActivityIndicator HorizontalOptions="Center" VerticalOptions="StartAndExpand" HeightRequest="20" IsRunning="True" />
</StackLayout>
This is the result.
Any suggestions on what I might be doing wrong?
It seems sizing itself is not supported on the ActivityIndicator. In this case, scaling is your friend.
The cutting-off you see happening is because the ActivityIndicator is inside a StackLayout. Because of how a StackLayout works, it will only take up the space it needs. Since scaling doesn't necessarily make your ActivityIndicator bigger, you have two options:
Replace your StackLayout with a Grid
Give your ActivityIndicator a WidthRequest and HeightRequest that is big enough to keep your scaled ActivityIndicator
Note: Talking about iOS here. Width and height seem to work on Android
Remove HeightRequest="20", it blocks your scale property.
Code should look like this
<ActivityIndicator HorizontalOptions="Center" VerticalOptions="StartAndExpand" Scale="2" IsRunning="True" />
Now, you can scale to whatever size you want.