i have a a problem to active UI from prefabs when click on object using OnMouseDown code
public class TreeManager : MonoBehaviour {
public GameObject FuncUI;
// Use this for initialization
void Start () {
}
// Update is called once per frame
void Update () {
}
void OnMouseDown()
{
if (FuncUI.activeInHierarchy == false)
{
FuncUI.SetActive (true);
}
else
{
FuncUI.SetActive (false);
}
}
public void ExitOn()
{
Application.Quit ();
}
}
this OnMouseDown code is working if both object and gameobject UI is on hierarchy. but it not work if both i use from prefabs.. what i need to change so i can make it work for prefabs? my function UI is from canvas. when i click on the object, the FuncUI will appear on screen. this code i put inside the object that i want to click to appear FuncUI
Related
I have the below audiomanager for my project. Whenever I run a game from the "Play" button in Unity - I can change the volume via slider and the settings are being saved and they load when I exit and play again via Unity's "Play" button.
However can you please explain to me why I cannot do this when I go to the PlayGame and then I go back to the main menu via "restart" button in my game? When I do that - the slider is 100% charged and it doesn't save/load new setings.
Any comments / feedback is much appreciated!
public static AudioManager AMInstance;
[SerializeField] Slider volumeSlider;
private void Awake()
{
if (AMInstance != null && AMInstance != this)
{
Destroy(this.gameObject);
return;
}
AMInstance = this;
DontDestroyOnLoad(this);
}
private void Start()
{
if (!PlayerPrefs.HasKey("musicVolume"))
{
PlayerPrefs.SetFloat("musicVolume", 1);
Load();
}
else
{
Load();
}
}
public void ChangeVolume()
{
AudioListener.volume = volumeSlider.value;
Save();
}
public void Save()
{
PlayerPrefs.SetFloat("musicVolume", volumeSlider.value);
}
public void Load()
{
volumeSlider.value = PlayerPrefs.GetFloat("musicVolume");
}
}
You will need to call PlayerPrefs.Save() before you navigate to another scene. It does get called by default OnApplicationQuit, but since you are just setting a the float, you might need to explicitly call the Save function.
Unity's documentation for PlayerPrefs.Save
I am creating a unity app for android and want to implement back button functionality.I am using Unity 2019.1.11f1
I added an empty game object and attached a script to it which I have attached below.
public class BackButton : MonoBehaviour
{
private void Update()
{
if(Application.platform == RuntimePlatform.Android)
{
if(Input.GetKeyDown(KeyCode.Escape))
{
Application.Quit();
}
}
}
}
I am expecting the app to quit but nothing happens.I also tried using GetKey and GetKeyUp instead of GetKeyDown.
In my game I have LevelManager and LevelManager.cs and it's not a singleton.
I wanna make fade transition between scenes. I made animations for Fade_In and Fade_Out. And for the first it works fine but when I'd like to leave a scene, it (Fade_Out) doesn't work.
Some of LevelManager.cs:
private void Start() {
if (autoLoadNextLevelAfter != 0) {
Invoke("FadeOut", autoLoadNextLevelAfter);
}
}
public void LoadLevel(string name) {
SceneManager.LoadScene(name);
}
public void LoadNextLevel() {
SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex + 1);
}
private void FadeOut() {
animator.SetTrigger("FadeOut");
}
In the Start method I call Invoke of animation and at the end of Fade_Out I call LoadNextLevel method. In this case, Fade_Out works fine.
But If I wanna make transition with LoadLevel (it calls when I push the button) it breaks. I tried to make IEnumerator LoadLevel:
public void NewLoadLevel(string name) {
FadeOut();
StartCoroutine(CoroutLoadLevel(name));
}
private IEnumerator CoroutLoadLevel(string name) {
yield return new WaitForSeconds(1f);
SceneManager.LoadScene(name);
}
The console says: Coroutine couldn't be started because the the game object 'LevelManager' is inactive!. I guess it's because LevelManager is not a singleton.
Make sure the LevelManager is active and enabled. A coroutine needs an active object to run (because if it is not active update logic will not be called).
I am a beginner of Unity 3D. I am writing an android app, and my start menu has an exit button. My idea is just very simple: after users press the exit button, the application will close.
I know Application.Quit() for quiting an app. But I just dont know how to detect a touch from user on a button and return the application.quit() method. Should I use sth like button.onclick or input.getTouch?
This is my code:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class ExitButton : MonoBehaviour {
public Button exitButton;
void Start()
{
Button btn = exitButton.GetComponent<Button>();
btn.onClick.AddListener(TaskOnClick);
}
void TaskOnClick()
{
Application.Quit ();
Debug.Log("You touched this button.");
}
}
After I tried to play my app, I get this error:
NullReferenceException: Object reference not set to an instance of an object
ExitButton.Start()
And it seems that I cant get signal from user touching the button.
Can someone give me a help?
I have linked my button in inspector, but i am not able to find my function name:TaskOnClick()
Inspector
Put the following code into a script
public void QuitGame()
{
Application.Quit();
}
attach the script to a game object then assign the button to a method using the OnClick window at the bottom of the button component in the inspector.
Attach the game object to the OnClick and choose the QuitGame function.
Note. This will only work in the build of the game and not in the editor.
You are mixing up between two methods of using a button.
If you are following #Jack Foulkes's method then you don't need to assign the button externally. That means you don't need the following code:
public Button exitButton;
void Start()
{
Button btn = exitButton.GetComponent<Button>();
btn.onClick.AddListener(TaskOnClick);
}
If you use the above code, then you don't need to add OnClick event listener in inspector, as you are already adding it inside your code. Only your code will work. You are getting the null reference, because you haven't assigned the exitButton from inspector actually.
It should look like this in the inspector:
inspector
simple you have problem with access modifiers to fix this just type
public void TaskOnClick()
{
Application.Quit ();
}
check this video it's will help you create a professional gui.
How to make a professional GUI using unity
Create a script with the following contents and then attach it to the corresponding button click
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class ExitButton : MonoBehaviour {
public void ExitGame()
{
print("Exiting...");
Application.Quit();
}
}
Hello,
All you need to do is to just make this function Public
like this:
public void TaskOnClick()
{
Application.Quit();
}
You Can Also make an if statement to make it much better :)
FOR EXAMPLE:
public void TaskOnClick()
{
if (Input.GetKeyDown(KeyCode.Escape) // You Can also change the key
{
Application.Quit();
}
}
And If you want to make it less effort MAKE a Function
TRY THIS:
public void ExitFunction()
{
if (Input.GetKeyDown(KeyCode.Escape) // Or Any Other Key
{
Application.Quit();
Debug.Log("exitgame");
}
}
Public void TaskOnClick()
{
ExitFunction();
}
And Also Here is the code if you want to make the same function but on the left Mouse Button Click
public void ExitFunction()
{
if (Input.GetMouseButtonDown(0))
{
Application.Quit();
Debug.Log("exitgame");
}
}
public void TaskOnClick()
{
ExitFunction();
}
If you want it with the Right Mouse Button
Here is the Answer:
public void ExitFunction()
{
if (Input.GetMouseButtonDown(1))
{
Application.Quit();
Debug.Log("quitgame");
}
}
public void TaskOnClick()
{
ExitFunction();
}
If you want it but with the middle buttonHere is the Answer:
public void ExitFunction()
{
if (Input.GetMouseButtonDown(2))
{
Application.Quit();
Debug.Log("quitgame");
}
}
public void TaskOnClick()
{
ExitFunction();
}
Full Best Code:
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
public class ExitButton : MonoBehaviour
{
public void ExitFunction()
{
if (Input.GetMouseButtonDown(0))
{
Application.Quit();
Debug.Log("quitgame");
}
}
public void TaskOnClick()
{
ExitFunction();
}
}
Lesson Summary:
-- Sometimes Use public when we need it like when we use GameObjects and Transforms for example.
-- if () statement is used to make the I.D.E understands the very specific objects like Do an action when .... is pressed.
Thank you.
Hope This Helped
Eyad ,
A Professional Game Developer & Front End Web Developer
Do you link your button in inspector?
EDIT.
I think this should be changed also:
void TaskOnClick()
{
Debug.Log("You touched this button.");
Application.Quit ();
}
I want my OptionButton from MainMenu to Hide the MainMenuCanvas so I can use the OptionCanvas, is it Possible?
using UnityEngine;
using UnityEngine.UI;
using System.Collections;
public class Director : MonoBehaviour {
private GameObject mainMenu, options;
void Awake (){
mainMenu = GameObject.Find ("MainMenuCanvas");
options = GameObject.Find ("OptionCanvas");
}
void Start () {
mainMenu.SetActive (true);
options.SetActive (false);
}
void Update () {
//should i put If.else here?
/* like
if (button.clicked){
mainMenu.SetActive (false);
options.SetActive (true);*/
}
}
}
It should be possible. Though I'd recommend using Canvas.enabled(https://docs.unity3d.com/ScriptReference/Behaviour-enabled.html) variable for consistency.
Just create a function in a script to handle the click. f.e.
void onOptionsClick(){
if(mainMenuCanvas.enabled){
mainMenuCanvas = false;
optionCanvas = true;
}
else{
mainMenuCanvas = true;
optionCanvas = false;
}
}
This function should do what you want. Then you simply select the button and choose this function as a onClick() of that button in the Inspector.
Let me know if that works as I cannot test it atm!
You simply need to register your OptionButton event to a function. When that Button is clicked, the registered function will be called. Button.onClick.AddListener is used to register the Button event. Button.onClick.RemoveAllListeners is used to un-register the Button event.
private GameObject mainMenu, options;
public Button OptionButton;
void Awake()
{
mainMenu = GameObject.Find("MainMenuCanvas");
options = GameObject.Find("OptionCanvas");
}
void Start()
{
mainMenu.SetActive(true);
options.SetActive(false);
}
void OnEnable()
{
//Register Button Event
OptionButton.onClick.AddListener(() => OptionButtonCallBack());
}
//Will be called when OptionButton is clicked
private void OptionButtonCallBack()
{
mainMenu.SetActive(false);
options.SetActive(true);
}
void OnDisable()
{
//Un-Register Button Event
OptionButton.onClick.RemoveAllListeners();
}
You can find complete step to setup your UI here.