[英]How to change a label with a random list of phrases with Xamarin
I'm new to Xamarin, I want to make an application who every day, a phrase change.我是 Xamarin 的新手,我想每天做一个应用程序,一个短语变化。 I want to use a timer to change the phrase.
我想使用计时器来更改短语。
I tried several tutorials but didn't work to me.我尝试了几个教程,但对我没有用。
Here's a example on my XAML and C# code who I made actualy:这是我实际制作的 XAML 和 C# 代码示例:
XAML XAML
<ScrollView Grid.Row="1">
<StackLayout Orientation="Vertical" Padding="30,24,30,24" Spacing="10">
<Label x:Name="Label_Time" Text="[TIME]" FontSize="Title" HorizontalOptions="Center"/>
<Label Text="before the new enigma" FontSize="Subtitle" HorizontalOptions="Center"/>
<Label Text="You can resolve now or waiting tomorrow for a new enigma." FontSize="20" Padding="0,0,0,0"/>
<Entry x:Name="Label_Answer" Placeholder="Enter the answer"/>
<Button Text="Answer" BackgroundColor="#487eb0" Clicked="OnButtonClicked"/>
</StackLayout>
</ScrollView>
C# C#
public void RandomEnigma(object sender, EventArgs e)
{
var enigmas = new List<string>()
{
"My first is the main color of the earth, my second can be used to move, my third is for surviving. My everything is a liquid. What is that ?",
"Very childish, I can introduce children to programming. What is my name ?",
};
}
private void OnButtonClicked(object sender, EventArgs e)
{
// WIP
}
You can generate a number between 0 and the range of array enigmas
each time with the following code:您可以使用以下代码每次生成一个介于 0 和数组
enigmas
范围之间的数字:
int range = enigmas.Count;
Random rnd = new Random();
int number = rnd.Next(0, range-1); // creates a number between 0 and range-1
And after that, assign a value of the arry to a label:之后,将数组的值分配给标签:
mLabel.Text = enigmas[number];
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