MonoBehaviour.StartCoroutine

最新推荐文章于 2024-06-07 22:07:46 发布

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本文详细介绍了如何使用C#中的StartCoroutine方法启动协程，通过yield语句实现多帧内的行为模拟，包括等待指定时间并打印当前时间的操作。还提供了将协程方法名作为字符串传递的例子，以便于使用StopCoroutine方法停止特定协程。

function StartCoroutine (routine : IEnumerator) : Coroutine

Description

Starts a coroutine.

The execution of a coroutine can be paused at any point using the yield statement. The yield return value specifies when the coroutine is resumed. Coroutines are excellent when modelling behaviour over several frames. Coroutines have virtually no performance overhead. StartCoroutine function always returns immediately, however you can yield the result. This will wait until the coroutine has finished execution.

When using JavaScript it is not necessary to use StartCoroutine, the compiler will do this for you. When writing C# code you must call StartCoroutine.

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    void Start() {
        print("Starting " + Time.time);
        StartCoroutine(WaitAndPrint(2.0F));
        print("Before WaitAndPrint Finishes " + Time.time);
    }
    IEnumerator WaitAndPrint(float waitTime) {
        yield return new WaitForSeconds(waitTime);
        print("WaitAndPrint " + Time.time);
    }
}

Another Example:

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    IEnumerator Start() {
        print("Starting " + Time.time);
        yield return StartCoroutine(WaitAndPrint(2.0F));
        print("Done " + Time.time);
    }
    IEnumerator WaitAndPrint(float waitTime) {
        yield return new WaitForSeconds(waitTime);
        print("WaitAndPrint " + Time.time);
    }
}

function StartCoroutine (methodName : String, value : object = null) : Coroutine

Description

Starts a coroutine named methodName.

In most cases you want to use the StartCoroutine variation above. However StartCoroutine using a string method name allows you to use StopCoroutine with a specific method name. The downside is that the string version has a higher runtime overhead to start the coroutine and you can pass only one parameter

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    IEnumerator Start() {
        StartCoroutine("DoSomething", 2.0F);
        yield return new WaitForSeconds(1);
        StopCoroutine("DoSomething");
    }
    IEnumerator DoSomething(float someParameter) {
        while (true) {
            print("DoSomething Loop");
            yield return null;
        }
    }
}