koobas.hobune.stream
How to update UI image mid-game (Unity, C#)
Hello, I'm trying to update a UI image when you click on different buttons. I am currently able to change the UI image only at the start of the game by using C# scripts to set the UI image's source image to something. I believe I have written the correct code that adds a layer of image changing to change the UI image - basically, I'm able to change the image of the image that directly changes the image of the UI image. When I plug this line of code into Start() it works perfectly. When I put it in a function and assign a button to fire the program when it is clicked on, it doesn't work. It also doesn't work when I plug the code into Update() which makes me think that my code only allows for the image change at the start of the game. Here is my code: " public Sprite FrogImage;
void Start()
{
}
public void FClickCharacter()
{
GameObject.FindWithTag("ChoosedCharacter").GetComponent<SelectedCharacter>().sprite1 = FrogImage;
}
public void MClickCharacter()
{
}
public void PClickCharacter()
{
}
public void VClickCharacter()
{
}
" FrogImage is an image I set in Unity, and "SelectedCharacter" is a different script containing "sprite1" which changes the UI image. When I assign FClickCharacter to a button and click the button it doesn't work. When I put it into Start() the UI image is set to "FrogImage" at the start of the game. When I put it into Update() it just is the original value of sprite1. Any suggestions or tips would be very appreciated, thanks!
First you have to declare a Image and find the gameobject sprite in the start or awake then store the gameobject sprite in the image. Then you can do what you want
Image frogSprite;
void Start()
{
frogSprite = GameObject.FindWithTag("ChoosedCharacter").GetComponent<SelectedCharacter>().sprite1;
}
public void FClickCharacter()
{
frogSprite = FrogImage;
}
Frm what I see in you code, I'm actually surprised you get it working in the start method. If I understand well, sprite1 is a member of the SelectedCharacter class. You could use a property in the SelectedCharacter class to update the image when you set the sprite value like this.
using UnityEngine;
using UnityEngine.UI;
public class SelectedCharacter : MonoBehaviour
{
private Image image;
private Sprite sprite1;
public Sprite Sprite1{
get => sprite1;
set {
sprite1 = value;
image.sprite = sprite1;
}
}
void Awake() {
image = GetComponent<Image>();
}
//Rest of your code
}
This way, you can now assign the value in your function with this call
public void FClickCharacter()
{
GameObject.FindWithTag("ChoosedCharacter").GetComponent<SelectedCharacter>().Sprite1 = FrogImage;
}
It should automatically update the image sprite when changing the value. If it doesn't work, you should check in the scene view when being in play mode if you have a character with the ChoosedCharacter tag and if this object is enabled. If not, the Find method will fail.
