I would like my app to show the message on the first back button press as "Please touch back button again to quit the app" and when it is pressed again the app should quit. I think I have added appropriate code but it doesn't work.
The script is attached as a component to the canvas element.
The script contains the public variable which I assigned the panel(Child of canvas) UI element.
Scene hierarchy
Observed:
When I pressed the back button the text appears but only a fraction of a second and then disappear all of a sudden and the next back button press did not resulted in app quit.
Desired
On first back button press it should show the message and with in say 3 seconds if the second back button pressed the app should quit.
Relevant information:
Unity 2017.1.0f3
Here is the Code link :
https://gist.github.com/bmohanrajbit27/431221fc80e0b247649289fd136f9cfb
public class ChangeSceneScript : MonoBehaviour
{
private bool iQuit = false;
public GameObject quitobject;
void Update()
{
if (iQuit == true)
{
if (Input.GetKeyDown(KeyCode.Escape))
{
Application.Quit();
}
}
if (Input.GetKeyDown(KeyCode.Escape))
{
quitobject.SetActive(true);
iQuit = true;
StartCoroutine(QuitingTimer());
}
}
IEnumerator QuitingTimer()
{
yield return new WaitForSeconds(3);
iQuit = false;
quitobject.SetActive(false);
}
}
I've seen few instances where Application.Quit(); did not work on Android. When this happens, use System.Diagnostics.Process.GetCurrentProcess().Kill(); to exit out of the program.
Now, for your timer issue, start a coroutine in the Update function when input is pressed for the first time. Use a flag to make sure that this coroutine function is not started again until the last one has finished. A boolean variable is fine.
Inside, that coroutine function, don't use yield return new WaitForSeconds(3); to wait for the timer. Use a while loop with the combination of yield return null; to wait until the timer is done. Increment the timer with Time.deltaTime each frame. Now, you can easily check for the second press in that coroutine function and exit if pressed.
If you also want this to work in the Editor, you have to use UnityEditor.EditorApplication.isPlaying = false; to exit. The example below should also work in the Editor. See the comments in the code if you have any question.
public GameObject quitobject;
private bool clickedBefore = false;
void Update()
{
//Check input for the first time
if (Input.GetKeyDown(KeyCode.Escape) && !clickedBefore)
{
Debug.Log("Back Button pressed for the first time");
//Set to false so that this input is not checked again. It will be checked in the coroutine function instead
clickedBefore = true;
//Activate Quit Object
quitobject.SetActive(true);
//Start quit timer
StartCoroutine(quitingTimer());
}
}
IEnumerator quitingTimer()
{
//Wait for a frame so that Input.GetKeyDown is no longer true
yield return null;
//3 seconds timer
const float timerTime = 3f;
float counter = 0;
while (counter < timerTime)
{
//Increment counter while it is < timer time(3)
counter += Time.deltaTime;
//Check if Input is pressed again while timer is running then quit/exit if is
if (Input.GetKeyDown(KeyCode.Escape))
{
Debug.Log("Back Button pressed for the second time. EXITING.....");
Quit();
}
//Wait for a frame so that Unity does not freeze
yield return null;
}
Debug.Log("Timer finished...Back Button was NOT pressed for the second time within: '" + timerTime + "' seconds");
//Timer has finished and NO QUIT(NO second press) so deactivate
quitobject.SetActive(false);
//Reset clickedBefore so that Input can be checked again in the Update function
clickedBefore = false;
}
void Quit()
{
#if UNITY_EDITOR
UnityEditor.EditorApplication.isPlaying = false;
#else
//Application.Quit();
System.Diagnostics.Process.GetCurrentProcess().Kill();
#endif
}
Related
I am very new to programming so please have patience with me. I am trying to add a delay to pressing a button in Unity. For example when i press "S" there should be a specified number of seconds that has to pass before i can press it again. Can anyone help me out ???
How can i add a delay to pressing buttons in Unity
If you want to achieve that you can set a delayTime and count it down in the Update Method and make the button do nothing on press until the time has passed.
Example:
float time = 0f;
void Update() {
if (time > 0f){
// Subtract the difference of the last time the method has been called
time -= Time.deltatime;
}
if (Input.GetKeyDown("S") && time <= 0) {
// Exectue Code you had in your Button Click function before
time = 2f;
}
}
If we want to elaborate on your answer we could also make the buttons enabled property disabled as long as the timer is not down to 0.
Example 2:
float time = 0f;
Button btn; // The Button you want to be unpressable
void Update() {
if (time > 0f){
// Subtract the difference of the last time the method has been called
time -= Time.deltatime;
btn.enabled = false;
}
else {
btn.enabled = true;
}
if (Input.GetKeyDown("S") && time <= 0) {
// Exectue Code you had in your Button Click function before
time = 2f;
}
}
I'm going to have to recall from memory here, but I believe you want to create an enumerator function, something along the lines of:
IEnumerator OnButtonClicked()
{
}
and when your button is clicked, you want to start this coroutine using:
StartCoroutine(OnButtonClicked());
And inside the OnButtonClicked() (or whatever you choose to name it), simply call:
yield return new WaitForSeconds(1);
and then do whatever you want it to do after the delay, after this.
I created an animator called "m4a4animator". Inside it, the main function is called "idle" (nothing), and other 2 states: "shoot" (mouse0) and "reload" (R). These 2 animation states are transitioned to "idle". Now, everything is working... but the only problem I have is this: if I am in the middle of reloading and and press mouse0 (shoot), the animation running state immediately changes to shoot... but I want to block that.
Now, the question: How can I stop CERTAIN animation changes while an animation is running?
Here is my animator
And here is my script:
using UnityEngine;
using System.Collections;
public class m4a4 : MonoBehaviour {
public Animator m4a4animator;
// Use this for initialization
void Start () {
}
// Update is called once per frame
void Update () {
if (Input.GetKeyDown (KeyCode.R)) {
m4a4animator.Play("reload");
}
if (Input.GetMouseButton(0)) {
m4a4animator.Play("shoot");
}
}
}
For the legacy Animation system, Animation.IsPlaying("TheAnimatonClipName) is used to check if the animation clip is playing.
For the new Mechanim Animator system, you have to check if both anim.GetCurrentAnimatorStateInfo(animLayer).IsName(stateName) and anim.GetCurrentAnimatorStateInfo(animLayer).normalizedTime < 1.0f) are true. If they are then animation name is currently playing.
This can be simplified like the function like the Animation.IsPlaying function above.
bool isPlaying(Animator anim, string stateName)
{
if (anim.GetCurrentAnimatorStateInfo(animLayer).IsName(stateName) &&
anim.GetCurrentAnimatorStateInfo(animLayer).normalizedTime < 1.0f)
return true;
else
return false;
}
Now, everything is working... but the only problem I have is this: if
I am in the middle of reloading and and press mouse0 (shoot), the
animation running state immediately changes to shoot... but I want to
block that.
When the shoot button is pressed, check if the "reload" animation is playing. If it is, don't shoot.
public Animator m4a4animator;
int animLayer = 0;
// Update is called once per frame
void Update()
{
if (Input.GetKeyDown(KeyCode.R))
{
m4a4animator.Play("reload");
}
//Make sure we're not reloading before playing "shoot" animation
if (Input.GetMouseButton(0) && !isPlaying(m4a4animator, "reload"))
{
m4a4animator.Play("shoot");
}
}
bool isPlaying(Animator anim, string stateName)
{
if (anim.GetCurrentAnimatorStateInfo(animLayer).IsName(stateName) &&
anim.GetCurrentAnimatorStateInfo(animLayer).normalizedTime < 1.0f)
return true;
else
return false;
}
If you need to wait for the "reload" animation to finish playing before playing the "shoot" animation then use a coroutine. This post described how to do so.
There are other threads about that: https://answers.unity.com/questions/362629/how-can-i-check-if-an-animation-is-being-played-or.html
if (this.animator.GetCurrentAnimatorStateInfo(0).IsName("YourAnimationName"))
{
//your code here
}
this tells you if you are in a certain state.
Animator.GetCurrentAnimatorStateInfo(0).normalizedTime
this give you the normalized time of the animation: https://docs.unity3d.com/ScriptReference/AnimationState-normalizedTime.html
Try to play with those function, I hope that solve your problem
I'm creating a Pop up menu Option in Unity. Now my Problem here is that the coroutine i made in void update is being called so many times. What i mean by that is on my Unity Console the Debug.Logs are incrementing . It should not right because its already coroutine. Could some help me understand more coroutine and help me solve my little problem .
Here is my code:
[SerializeField]
GameObject Option;
[SerializeField]
Button btn,btn2;
[SerializeField]
GameObject open, close;
[SerializeField]
GameObject[] opt;
bool startFinding = false;
void Start()
{
Option.SetActive(false);
Button popUp = btn.GetComponent<Button>();
Button popUp2 = btn2.GetComponent<Button>();
popUp.onClick.AddListener(PopUpOption);
popUp2.onClick.AddListener(ClosePopUp);
}
void Update()
{
if (startFinding)
{
StartCoroutine(GameOptions());
}
}
IEnumerator GameOptions()
{
//Get All the tags
opt = GameObject.FindGameObjectsWithTag("MobileOptions");
if (opt[0].GetComponent<Toggle>().isOn == true && opt[1].GetComponent<Toggle>().isOn == true)
{
Debug.Log("Disable first the check box then choose only 1 option between" + "'rendering'"+ "and" + "'livestreaming'");
}
//Livestreaming
if (opt[0].GetComponent<Toggle>().isOn == true)
{
Debug.Log("Livestreaming Activate");
} else
{
Debug.Log("Livestreaming Deactivate");
}
//Rendering
if (opt[1].GetComponent<Toggle>().isOn == true)
{
Debug.Log("Rendering Activate");
} else
{
Debug.Log("Rendering Deactivate");
}
//Fog
if (opt[2].GetComponent<Toggle>().isOn == true)
{
Debug.Log("Fog Activated");
} else
{
Debug.Log("Fog Deactivated");
}
//Camera Effect
if (opt[3].GetComponent<Toggle>().isOn == true)
{
Debug.Log("Camera Effect Activated");
} else {
Debug.Log("Camera Effect Deactivated");
}
yield return null;
}
void PopUpOption()
{
startFinding = true;
//Disable The Mobile Option Button
open.SetActive(false);
//Enable the Close Option Button
close.SetActive(true);
//activate the Mobile Options
Option.SetActive(true);
}
void ClosePopUp()
{
startFinding = false;
//eanble the mobile option button
open.SetActive(true);
//disable the close option button
close.SetActive(false);
//deactivate the Mobile Option
Option.SetActive(false);
}
Here is how coroutines work:
Let's say I have a couroutine function called MyRoutine (in your case, you called it GameOptions)
private IEnumerator MyRoutine()
Then, anywhere in my code, calling
StartCoroutine(MyRoutine));
Is going to simply call MyRoutine like any usual method. So if you call it in update, it will be called all the time, as any method would. This is not what you want. What make coroutines special is that you can use the yield keyword in them. There are many ways to use it but the most used (and simple) one is to do yield return null
yield return null means "Stop this coroutine, but resume the execution on next frame". You don't need to call any other function (certainly not StartCoroutine). The execution will resume next frame.
To go back to what you posted in your question, you wrote yield return null at the end. So your method is executing, and just at the end, stops and resumes next frame, but since there is nothing left to do, it exits on the next frame.
A typical way to use coroutines is to have the yield return null in a while loop, so when it resumes, it continues the loop. Here is an example that do it
private IEnumerator MyRoutine()
{
while(running) //running is a member bool that you could set to false to exit
{
// Do all the stuff you want to do in ONE frame
// ...
yield return null;
}
}
Typically, the StartCoroutine would be called in the Start() function, or later when an event is triggered.
If you want to know more about coroutine, or check that you understood them properly, check out this page: https://docs.unity3d.com/Manual/Coroutines.html
or this video https://unity3d.com/learn/tutorials/topics/scripting/coroutines
// Edit: quickly present one useful option
In the snippet above, the while loop is very similar to the Update function (the inside of the loop is executed each frame). One nice option is to replace
yield return null
by
yield return new WaitForSeconds(waitTime)
where waitTime is a the time you want to wait before resuming, in seconds
// End of edit
Do not use StartCoroutine() in the Update method. Call it in another method and use a while loop inside your coroutine function if needed. Just control your StartCoroutine() outside of Update method
Update is called every frame, if your condition is ever true, you launch your coroutine every frame.
Just set down your flag to only join 1 time.
void Update()
{
if (startFinding)
{
startFinding = false;
StartCoroutine(GameOptions());
}
}
I writing runner game on Unity (C#) for mobile phones.
I made Pause button on screen, using Canvas - Button.
Also I made code for Pause in Platformer2DUserControl script.
Here it is code of this script:
using UnityEngine;
using UnitySampleAssets.CrossPlatformInput;
namespace UnitySampleAssets._2D
{
[RequireComponent(typeof(PlatformerCharacter2D))]
public class Platformer2DUserControl : MonoBehaviour
{
private PlatformerCharacter2D character;
private bool jump;
public bool paused;
private void Awake()
{
character = GetComponent<PlatformerCharacter2D>();
paused = false;
}
private void Update()
{
/*if (Input.GetButton("Fire1"))
{
}*/
if (!jump)
// Read the jump input in Update so button presses aren't missed.
jump = Input.GetButton("Fire1"); //&& CrossPlatformInputManager.GetButtonDown("Jump");
}
private void FixedUpdate()
{
// Read the inputs.
bool crouch = Input.GetKey(KeyCode.LeftControl);
// float h = CrossPlatformInputManager.GetAxis("Horizontal");
// Pass all parameters to the character control script.
character.Move(1, false, jump);
jump = false;
}
public void Pause()
{
if (!jump)
// Read the jump input in Update so button presses aren't missed.
jump = Input.GetButton("Fire1"); //&& CrossPlatformInputManager.GetButtonDown("Jump");
paused = !paused;
if (paused)
{
jump = !jump;
Time.timeScale = 0;
}
else if (!paused)
{
// jump = Input.GetButton("Fire1");
Time.timeScale = 1;
}
}
}
}
My Pause Button is WORKS well. But when I tap it , my character is jumping and game is pausing.
I want to make that , when I tapping the button game just pausing and character don't jump.
How I can make it. Thank's for help.
I would advise you not to use the same input for jumping and pausing. Also, separate your jump and pause functionalities into separate functions. For pausing, create a UI button on the screen and make it call a public function on a Pause script, that will toggle pause. Then, in the same function, check if you are paused or not and adjust Time.timescale accordingly
You will have to attach the script with pause functionality on to an object that will always be in a screen (Say, a panel in your canvas or your MainCamera). Under the button, add a new onClick() function after dragging the GO with the apt script to the box. Then, select the public function aforementioned.
private bool paused = false;
//The function called by the button OnClick()
public void TogglePause()
{
paused = !paused;
if(paused)
Time.timescale = 0f;
else
Time.timescale = 1f;
}
Hope this helped!
Well, your code is messed up, but just remove the jump script from the pause method. So it will just pause...
public void Pause()
{
paused = !paused;
if (paused)
{
Time.timeScale = 0;
}
else
{
Time.timeScale = 1;
}
}
Note that Input.GetButton should only be called in Update
EDIT
The problem that you have to tap your screen to press the button. And the code jump = Input.GetButton("Fire1"); basically means "Am I tapping the screen?" So both JUMP and PAUSE are triggered.
One solution would be to put a canvas filling the whole screen under your buttons. You will trigger a JUMP action only when this canvas is clicked. So when you click your pause button, it will stop the propagation and won't click the full screen canvas, which won't trigger the jump action.
EDIT2
Try changing the lines (in the Update function) :
if (!jump)
// Read the jump input in Update so button presses aren't missed.
jump = Input.GetButton("Fire1");
for :
if (!jump && !paused)
// Read the jump input in Update so button presses aren't missed.
jump = Input.GetButton("Fire1");
I think the button event is called before the Update, see reference
One solution would be possible make sure the raycast on of pause button.
I have always done it like this, essentially surround the entire fixed update (or wherever you have your game motion) with the paused-bool
private void FixedUpdate()
{
if (paused != true){
// Read the inputs.
bool crouch = Input.GetKey(KeyCode.LeftControl);
// float h = CrossPlatformInputManager.GetAxis("Horizontal");
// Pass all parameters to the character control script.
character.Move(1, false, jump);
jump = false;
}
}
Essentially I have a door trigger event where if the player presses the switch then the door open. I wish however to do it so that if the door associated needs two switches to open well... then it only opens if two switches are pressed. Here is my code for my InteractSwitch
public class InteractSwitch : MonoBehaviour
{
Animator animator;
public DoorEventTrigger[] doorTriggers;
public bool pressed;
private bool down;
// Use this for initialization
void Start ()
{
animator = GetComponent <Animator> ();
}
// Update is called once per frame
void Update ()
{
}
void OnCollisionEnter2D (Collision2D target)
{
if (target.gameObject.tag == "Player") {
down = true;
animator.SetInteger ("SwitchTrig", 1);
foreach (DoorEventTrigger trigger in doorTriggers)
if (trigger != null)
trigger.Toggle (true);
}
}
When triggered this event checks for player, shows switch has been pressed then sends a bool to a function called Toggle which handles the operation of the door.
Next I have my DoorEventTrigger event which checks if the bool sent = true. If it is then the door will open. Here is where I am stuck. As seen in the code I have created a array of InteractSwitch which stores the amount of switches I want the player to have pressed before the door will open. I then state that if the length > 1 then this if condition is true and some code will be added here which will then open the door only if the player has selected the InteractSwitch[].length switches. My question is how would I check that all instances of InteractSwitch for this DoorEventTrigger equals true?
Here is my DoorEventTrigger code
public void Toggle (bool val)
{
if (switchTriggers.Length > 1) {
Debug.Log ("HAS THIS ACTUALLY DONE ANYTHING");
door.Open ();
}
else
{
if (val)
door.Open ();
else
door.Close ();
}
}
}
The solution I came up with is nowhere near I believe the most efficient answer as it requires code each time u add a new switch but this is what I have
firstly in the InteractSwitch script the bool down is public so it can be accessed by the switchtriggers
public bool down;
Next is the added code to the Toggle() method
public void Toggle (bool val)
{
if (switchTriggers.Length > 1) {
if((switchTriggers[0].down == true) && (switchTriggers[1].down == true)){
Debug.Log ("THIS ACTUALLY DONE SOMETHING!");
door.Open ();
}
}
else
{
if (val)
door.Open ();
else
door.Close ();
}
}
Now from the public SwitchInteract[]; I know the exact amount of elements in the array however this could be checked through switchTriggers.length; Knowing there is two elements in the array my condition switchTriggers.Length > 1 is correct so next I take the two elements in the array and check if they are down; if BOTH are down then the condition continues and the Debug.Log() validates this. Finally Open() is called which opens the door.
You can have the switches increment or decrement a required switch variable in the door object.
Give the door object a requiredSwitch variable.
Give each switch a door variable and set it to the door it controls.
When a switch is activated, have it decrement its door's requiredSwitch variable.
When the door's requiredSwitch variable is 0, then the door opens.
You can also have the switches increment the variable if they get deactivated.
This solution allows you to add switches by just setting the door variable of the switch and incrementing the door's initial requiredSwitch variable.