Scheduler Class

Module: cc

Scheduler is responsible of triggering the scheduled callbacks.
You should not use NSTimer. Instead use this class.

There are 2 different types of callbacks (selectors):

- update callback: the 'update' callback will be called every frame. You can customize the priority.<br/>
- custom callback: A custom callback will be called every frame, or with a custom interval of time<br/>


The 'custom selectors' should be avoided when possible. It is faster, and consumes less memory to use the 'update callback'. *

Index

Properties
Methods

Details

Properties

PRIORITY_SYSTEM

Priority level reserved for system services.

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Type Number
Defined in cocos2d/core/CCScheduler.js:1092
PRIORITY_NON_SYSTEM

Minimum priority level for user scheduling.

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Type Number
Defined in cocos2d/core/CCScheduler.js:1101

Methods

enableForTarget

!en This method should be called for any target which needs to schedule tasks, and this method should be called before any scheduler API usage. This method will add a _id property if it doesn't exist. !zh 任何需要用 Scheduler 管理任务的对象主体都应该调用这个方法,并且应该在调用任何 Scheduler API 之前调用这个方法。 这个方法会给对象添加一个 _id 属性,如果这个属性不存在的话。

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Defined in cocos2d/core/CCScheduler.js:351
Parameters
setTimeScale

Modifies the time of all scheduled callbacks.
You can use this property to create a 'slow motion' or 'fast forward' effect.
Default is 1.0. To create a 'slow motion' effect, use values below 1.0.
To create a 'fast forward' effect, use values higher than 1.0.
Note:It will affect EVERY scheduled selector / action.

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Defined in cocos2d/core/CCScheduler.js:370
Parameters
getTimeScale

Returns time scale of scheduler.

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Returns Number
Defined in cocos2d/core/CCScheduler.js:390
update

'update' the scheduler. (You should NEVER call this method, unless you know what you are doing.)

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Defined in cocos2d/core/CCScheduler.js:400
Parameters
schedule

The scheduled method will be called every 'interval' seconds.
If paused is YES, then it won't be called until it is resumed.
If 'interval' is 0, it will be called every frame, but if so, it recommended to use 'scheduleUpdateForTarget:' instead.
If the callback function is already scheduled, then only the interval parameter will be updated without re-scheduling it again.
repeat let the action be repeated repeat + 1 times, use cc.macro.REPEAT_FOREVER to let the action run continuously
delay is the amount of time the action will wait before it'll start

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Defined in cocos2d/core/CCScheduler.js:486
Parameters
Examples
//register a schedule to scheduler
cc.director.getScheduler().schedule(callback, this, interval, !this._isRunning);
scheduleUpdate

Schedules the update callback for a given target, During every frame after schedule started, the "update" function of target will be invoked.

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Defined in cocos2d/core/CCScheduler.js:579
Parameters
unschedule

Unschedules a callback for a callback and a given target. If you want to unschedule the "update", use unscheduleUpdate()

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Defined in cocos2d/core/CCScheduler.js:641
Parameters
  • callback Function The callback to be unscheduled
  • target Object The target bound to the callback.
unscheduleUpdate

Unschedules the update callback for a given target.

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Defined in cocos2d/core/CCScheduler.js:698
Parameters
  • target Object The target to be unscheduled.
unscheduleAllForTarget

Unschedules all scheduled callbacks for a given target. This also includes the "update" callback.

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Defined in cocos2d/core/CCScheduler.js:728
Parameters
  • target Object The target to be unscheduled.
unscheduleAll

Unschedules all scheduled callbacks from all targets including the system callbacks.
You should NEVER call this method, unless you know what you are doing.

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Defined in cocos2d/core/CCScheduler.js:776
unscheduleAllWithMinPriority

Unschedules all callbacks from all targets with a minimum priority.
You should only call this with PRIORITY_NON_SYSTEM_MIN or higher.

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Defined in cocos2d/core/CCScheduler.js:789
Parameters
  • minPriority Number The minimum priority of selector to be unscheduled. Which means, all selectors which
     priority is higher than minPriority will be unscheduled.
    
isScheduled

Checks whether a callback for a given target is scheduled.

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Returns Boolean
Defined in cocos2d/core/CCScheduler.js:843
Parameters
  • callback Function The callback to check.
  • target Object The target of the callback.
pauseAllTargets

Pause all selectors from all targets.
You should NEVER call this method, unless you know what you are doing.

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Defined in cocos2d/core/CCScheduler.js:889
pauseAllTargetsWithMinPriority

Pause all selectors from all targets with a minimum priority.
You should only call this with kCCPriorityNonSystemMin or higher.

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Defined in cocos2d/core/CCScheduler.js:902
Parameters
resumeTargets

Resume selectors on a set of targets.
This can be useful for undoing a call to pauseAllCallbacks.

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Defined in cocos2d/core/CCScheduler.js:962
Parameters
pauseTarget

Pauses the target.
All scheduled selectors/update for a given target won't be 'ticked' until the target is resumed.
If the target is not present, nothing happens.

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Defined in cocos2d/core/CCScheduler.js:981
Parameters
resumeTarget

Resumes the target.
The 'target' will be unpaused, so all schedule selectors/update will be 'ticked' again.
If the target is not present, nothing happens.

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Defined in cocos2d/core/CCScheduler.js:1020
Parameters
isTargetPaused

Returns whether or not the target is paused.

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Returns Boolean
Defined in cocos2d/core/CCScheduler.js:1059
Parameters

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