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Unity Engine

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StopCoroutine

Stops the first coroutine named methodName, or the coroutine stored in routine running on this behaviour.

Read time 6 minutes

Last updated 6 days ago

Definition

Type: Method
Namespace: UnityEngine
Assembly: UnityEngine.CoreModule

StopCoroutine(IEnumerator)

Stops the first coroutine named methodName, or the coroutine stored in routine running on this behaviour.


public void StopCoroutine(IEnumerator routine)

Parameters

routine

IEnumerator

Name of the function in code, including coroutines.

Remarks

StopCoroutine

takes one of three arguments that specify which coroutine to stop:

A string function naming the active coroutine.
The
```
IEnumerator
```
variable used earlier to create the coroutine.
The
```
Coroutine
```
to stop the manually created
```
Coroutine
```
.

You must use the same parameter type to stop a coroutine with

StopCoroutine

as was used to start it with MonoBehaviour.StartCoroutine.

Coroutines also stop if:

The value of GameObject.activeSelf becomes
```
false
```
for the GameObject the script is attached to.
The MonoBehaviour script is destroyed with a call to Object.Destroy.

Note: Disabling the MonoBehaviour script by setting Behaviour.enabled to

false

doesn't stop coroutines.

StopCoroutine(null)

throws a NullReferenceException. Add checks to your code to ensure the argument is not null before calling

StopCoroutine

The following example uses the IEnumerator to stop a coroutine.


using UnityEngine;using System.Collections;public class Example : MonoBehaviour{    // keep a copy of the executing script    private IEnumerator coroutine;    // Use this for initialization    void Start()    {        print("Starting " + Time.time);        coroutine = WaitAndPrint(3.0f);        StartCoroutine(coroutine);        print("Done " + Time.time);    }    // print to the console every 3 seconds.    // yield is causing WaitAndPrint to pause every 3 seconds    public IEnumerator WaitAndPrint(float waitTime)    {        while (true)        {            yield return new WaitForSeconds(waitTime);            print("WaitAndPrint " + Time.time);        }    }    void Update()    {        if (Input.GetKeyDown("space"))        {            StopCoroutine(coroutine);            print("Stopped " + Time.time);        }    }}

The following example uses the Coroutine parameter to stop a coroutine.


using System.Collections;using System.Collections.Generic;using UnityEngine;public class ExampleClass : MonoBehaviour{    void Start()    {        StartCoroutine(coroutineA());    }    IEnumerator coroutineA()    {        // wait for 1 second        yield return new WaitForSeconds(1.0f);        Debug.Log("coroutineA() started: " + Time.time);        // wait for another 1 second and then create b        yield return new WaitForSeconds(1.0f);        Coroutine b = StartCoroutine(coroutineB());        yield return new WaitForSeconds(2.0f);        Debug.Log("coroutineA() finished " + Time.time);        // B() was expected to run for 10 seconds        // but was shut down here after 3.0f        StopCoroutine(b);        yield return null;    }    IEnumerator coroutineB()    {        float f = 0.0f;        float start = Time.time;        Debug.Log("coroutineB() started " + start);        while (f < 10.0f)        {            Debug.Log("coroutineB(): " + f);            yield return new WaitForSeconds(1.0f);            f = f + 1.0f;        }        // Intended to handling exit of the this coroutine.        // However coroutineA() shuts coroutineB() down. This        // means the following lines are not called.        float t = Time.time - start;        Debug.Log("coroutineB() finished " + t);        yield return null;    }}

StopCoroutine(Coroutine)

Stops the first coroutine named methodName, or the coroutine stored in routine running on this behaviour.


public void StopCoroutine(Coroutine routine)

Parameters

routine

Coroutine

Name of the function in code, including coroutines.

Remarks

StopCoroutine

takes one of three arguments that specify which coroutine to stop:

A string function naming the active coroutine.
The
```
IEnumerator
```
variable used earlier to create the coroutine.
The
```
Coroutine
```
to stop the manually created
```
Coroutine
```
.

You must use the same parameter type to stop a coroutine with

StopCoroutine

as was used to start it with MonoBehaviour.StartCoroutine.

Coroutines also stop if:

The value of GameObject.activeSelf becomes
```
false
```
for the GameObject the script is attached to.
The MonoBehaviour script is destroyed with a call to Object.Destroy.

Note: Disabling the MonoBehaviour script by setting Behaviour.enabled to

false

doesn't stop coroutines.

StopCoroutine(null)

throws a NullReferenceException. Add checks to your code to ensure the argument is not null before calling

StopCoroutine

The following example uses the IEnumerator to stop a coroutine.


using UnityEngine;using System.Collections;public class Example : MonoBehaviour{    // keep a copy of the executing script    private IEnumerator coroutine;    // Use this for initialization    void Start()    {        print("Starting " + Time.time);        coroutine = WaitAndPrint(3.0f);        StartCoroutine(coroutine);        print("Done " + Time.time);    }    // print to the console every 3 seconds.    // yield is causing WaitAndPrint to pause every 3 seconds    public IEnumerator WaitAndPrint(float waitTime)    {        while (true)        {            yield return new WaitForSeconds(waitTime);            print("WaitAndPrint " + Time.time);        }    }    void Update()    {        if (Input.GetKeyDown("space"))        {            StopCoroutine(coroutine);            print("Stopped " + Time.time);        }    }}

The following example uses the Coroutine parameter to stop a coroutine.


using System.Collections;using System.Collections.Generic;using UnityEngine;public class ExampleClass : MonoBehaviour{    void Start()    {        StartCoroutine(coroutineA());    }    IEnumerator coroutineA()    {        // wait for 1 second        yield return new WaitForSeconds(1.0f);        Debug.Log("coroutineA() started: " + Time.time);        // wait for another 1 second and then create b        yield return new WaitForSeconds(1.0f);        Coroutine b = StartCoroutine(coroutineB());        yield return new WaitForSeconds(2.0f);        Debug.Log("coroutineA() finished " + Time.time);        // B() was expected to run for 10 seconds        // but was shut down here after 3.0f        StopCoroutine(b);        yield return null;    }    IEnumerator coroutineB()    {        float f = 0.0f;        float start = Time.time;        Debug.Log("coroutineB() started " + start);        while (f < 10.0f)        {            Debug.Log("coroutineB(): " + f);            yield return new WaitForSeconds(1.0f);            f = f + 1.0f;        }        // Intended to handling exit of the this coroutine.        // However coroutineA() shuts coroutineB() down. This        // means the following lines are not called.        float t = Time.time - start;        Debug.Log("coroutineB() finished " + t);        yield return null;    }}

StopCoroutine(string)

Stops the first coroutine named methodName, or the coroutine stored in routine running on this behaviour.


public void StopCoroutine(string methodName)

Parameters

methodName

string

Name of coroutine.

Remarks

StopCoroutine

takes one of three arguments that specify which coroutine to stop:

A string function naming the active coroutine.
The
```
IEnumerator
```
variable used earlier to create the coroutine.
The
```
Coroutine
```
to stop the manually created
```
Coroutine
```
.

You must use the same parameter type to stop a coroutine with

StopCoroutine

as was used to start it with MonoBehaviour.StartCoroutine.

Coroutines also stop if:

The value of GameObject.activeSelf becomes
```
false
```
for the GameObject the script is attached to.
The MonoBehaviour script is destroyed with a call to Object.Destroy.

Note: Disabling the MonoBehaviour script by setting Behaviour.enabled to

false

doesn't stop coroutines.

StopCoroutine(null)

throws a NullReferenceException. Add checks to your code to ensure the argument is not null before calling

StopCoroutine

The following example uses the IEnumerator to stop a coroutine.


using UnityEngine;using System.Collections;public class Example : MonoBehaviour{    // keep a copy of the executing script    private IEnumerator coroutine;    // Use this for initialization    void Start()    {        print("Starting " + Time.time);        coroutine = WaitAndPrint(3.0f);        StartCoroutine(coroutine);        print("Done " + Time.time);    }    // print to the console every 3 seconds.    // yield is causing WaitAndPrint to pause every 3 seconds    public IEnumerator WaitAndPrint(float waitTime)    {        while (true)        {            yield return new WaitForSeconds(waitTime);            print("WaitAndPrint " + Time.time);        }    }    void Update()    {        if (Input.GetKeyDown("space"))        {            StopCoroutine(coroutine);            print("Stopped " + Time.time);        }    }}

The following example uses the Coroutine parameter to stop a coroutine.


using System.Collections;using System.Collections.Generic;using UnityEngine;public class ExampleClass : MonoBehaviour{    void Start()    {        StartCoroutine(coroutineA());    }    IEnumerator coroutineA()    {        // wait for 1 second        yield return new WaitForSeconds(1.0f);        Debug.Log("coroutineA() started: " + Time.time);        // wait for another 1 second and then create b        yield return new WaitForSeconds(1.0f);        Coroutine b = StartCoroutine(coroutineB());        yield return new WaitForSeconds(2.0f);        Debug.Log("coroutineA() finished " + Time.time);        // B() was expected to run for 10 seconds        // but was shut down here after 3.0f        StopCoroutine(b);        yield return null;    }    IEnumerator coroutineB()    {        float f = 0.0f;        float start = Time.time;        Debug.Log("coroutineB() started " + start);        while (f < 10.0f)        {            Debug.Log("coroutineB(): " + f);            yield return new WaitForSeconds(1.0f);            f = f + 1.0f;        }        // Intended to handling exit of the this coroutine.        // However coroutineA() shuts coroutineB() down. This        // means the following lines are not called.        float t = Time.time - start;        Debug.Log("coroutineB() finished " + t);        yield return null;    }}

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Unity Engine

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Unity Engine

StopCoroutine

Definition

StopCoroutine(IEnumerator)

Parameters

routine

Remarks

StopCoroutine(Coroutine)

Parameters

routine

Remarks

StopCoroutine(string)

Parameters

methodName

Remarks