Cocos2d-x multi-touch Summary

[1]: What is the difference between this and spof?

1. Differences in usage.

In some cases, we need multi-touch to achieve better results, such as fruit cutting.

2. Differences from spof

[1]. The single-point monitoring class is CCtargetedTouchDelegate, while the multi-point monitoring class is CCtangardTouchDelegate.

[2]. You also need to register multi-touch. Here you may ask why single-touch is stored in the onEnter lifecycle function. Why do I write multiple points separately. This is because, if you put it in onEnter, it may crash.

[3]. In addition, the multi-touch function setTouchEnabled must be enabled.

[4]. ccTouchesBegan in multi-touch is not a boolean type.

[2]: Functions

Touch screen events:

1. register multi-touch

Virtual void registerWithTouchDispatcher (void );

2. The callback function returned when the user first touches the mobile phone screen

Virtual void ccTouchesBegan (CCSet * pTouches, CCEvent * pEvent );

3. Callback Function of the response when the user's finger slides on the screen of the mobile phone

Virtual void ccTouchesMoved (CCSet * pTouches, CCEvent * pEvent );

4. callback function returned when the user's finger leaves the mobile phone screen

Virtual void ccTouchesEnded (CCSet * pTouches, CCEvent * pEvent );

The CCTouch parameter is not used here, but their set.

CCtouch

1. getID () // obtain the subscript of the current contact (starting from 0)

[3]: Example

For ios platform, add

// Enable multi-touch .. disabled by default.
[_ GlView setMultipleTouchEnabled: YES];

This is not required for android, because it is enabled by default...

This problem once wasted a lot of time. Mark!

Touchsdemo. h

// Write the multi-touch callback function

Virtual void registerWithTouchDispatcher (void );

Virtual void ccTouchesBegan (CCSet * set, CCEvent * e );

Virtual void ccTouchesMoved (CCSet * set, CCEvent * e );

Virtual void ccTouchesEnded (CCSet * set, CCEvent * e );

Touchsdemo. cpp

// Enable multi-point

This-> setTouchEnabled (true );

2. register the listener

Void Touchsdemo: registerWithTouchDispatcher (void ){

// Register the listener

CCDirector: sharedDirector ()-> getTouchDispatcher ()-> addStandardDelegate (this, 0 );

}

3. Implement touch screen events

Void Touchsdemo: ccTouchesBegan (CCSet * set, CCEvent * e)

{

CCSetIterator iter = set-> begin ();

// The iter here is equivalent to the number allocated by the system,

// Set-> begin () to obtain the first number

// Set-> end () is the last one

For (; iter! = Set-> end (); iter ++ ){

// Here, it is a single point of processing, which can be understood as splitting multiple points into single points.

CCTouch * mytouch = (CCTouch *) (* iter );

CCPoint cp = mytouch-> getLocation ();

// Process each touch point

}

}

On the way to learning, I will share with you.