Unity3d Tutorial: How to use C # script yield

Coroutines & Yield is an important concept in Unity3d programming, which can be implemented to defer execution of a program or to distribute its parts in a single time period, but in JavaScript and C # coroutines & Yield, there are some grammatical differences:

The yield usage in JavaScript is simple, direct yield on the line, or yield waitforseconds (2);

The usage in C # is as follows:

Yield cannot be used alone

Needs to be used in conjunction with return, for example:

1 yield return 0; Wait 0 Frames

2 yield return 1; Wait 1 frames

3 yield return waitforseconds (3.0); Wait 3 seconds

All functions that use yield must set the return value type to the IEnumerator type, for example:

1 IEnumerator dosomethingindelay () {...}

Finally, the key point that is not mentioned in the "Using C #" section is that all IEnumerator type functions must be triggered using the "startcoroutine" function and cannot be used alone, for example:

1 Startcoroutine (Dosomethingindelay ());

Unity3d Tutorial: How to use C # script yield