COCOS2DX Learning Note 11:COCOS2DX Scheduler (Scheduler)

Scheduler (Scheduler) is mainly for the game to provide timed events and timing services. Often used to play some of the functions of timed processing, such as some logic judgment, collision detection and so on.

COCOS2DX provides three commonly used schedulers (scheduler) for us to use.

Default Scheduler (schedulerupdate)

The default scheduler uses the Refresh event Update method of node, which is called once before each frame is drawn. Because the time interval between frames is short, each frame refresh is sufficient to complete the logical judgment required for most of the gameplay.

when we use the default scheduler (schedulerupdate), we need to overload Node of the Update method to execute its own logic code. If you need to stop this scheduler, you can use the Unschedulerupdate () method.

use time to override the Update method in the. h file First: void update (float dt).

call the implementation of update using the Scheduleupdate () method directly where it is called.

Custom Scheduler (Scheduler)

Sometimes the engine comes with a scheduler that doesn't fit our needs, so we need to define the scheduler ourselves. This method is provided by COCOS2DX.

Schedule (sel_schedule selector, float interval, unsigned int repeat, float delay)

the first parameter, selector, is the event function you want to add.

the second parameter, interval, is the event firing interval.

The third parameter, repeat, is the number of times a trigger is triggered after an event, and the default value is Krepeatforever, which indicates the number of infinite triggers.

the fourth parameter, delay, indicates the delay before the first trigger.

Single-Time Scheduler (scheduleronce)

The Cocos2d-x also provides a single-time scheduler with only one dispatch.

scheduleonce (Schedule_selector (helloworld::updateonce), 0.1f);

Here I use Laberttf to implement a number +1 Self-growth default scheduler, to dynamically change the value of Labelttf.

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COCOS2DX Learning Note 11:COCOS2DX Scheduler (Scheduler)

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COCOS2DX Learning Note 11:COCOS2DX Scheduler (Scheduler)