Cocos2d-x 3.4 Action Management (ActionManager) Summary

cocos2d-x Action Management

The Action management class Ccactionmanager is a single instance that manages actions, and works by ccnode the action to pass the object to Ccactionmanager's singleton through the Addaction function of the action management class when the runaction is executed. The instance then adds this action to its own sequence of actions.

The action Management Singleton refreshes its own Update method by timing, and in this method calls the step of each action in the behavior sequence (the paused behavior is not updated), and the step method then updates or ends the behavior according to its completion progress.

In fact, each action driven by the action management Singleton is updated with its own logic, and the Runaction method simply adds the behavior object to the Ccactionmanager's pending queue. When a node is purged or the behavior ends, the action management class automatically removes the action from the queue without the programmer's management.

In general, you do not need to use this singleton to manage actions, you can use functions such as stopaction, Stopactionbytag, and stopactions of the Ccnode class to manage, but there are two cases where you need to use a Ccactionmanager class singleton:

The performer of the <1> action is not the same node. <2> when the activity needs to be paused/restarted.

first, cc_callback_0 without parameters

Auto Child = Sprite::create ("Images/grossini.png");

Rect r = director::getinstance ()->getopenglview ()->getvisiblerect ();

VEC2 v2 = Vec2 (r.origin.x+300,r.origin.y/2+r.size.height-300);

Child->setposition (v2);

AddChild (child,1);

Child->runaction (Rotateby::create (1.5f,90));//rotation 90 degrees clockwise

Child->runaction (Sequence::create (Delaytime::create (1.4f), Fadeout::create (1.1f), nullptr));//1.4 seconds later, disappears

Child->runaction (Sequence::create (Delaytime::create (1.4f), Callfunc::create (cc_callback_0:: Remove, this)) (nullptr));//After 1.4 seconds, execute the Remove method

void HelloWorld::Remove() {

Cclog ("bbbbbbbbbb");

}

two, cc_callback_1 with a parameter

Auto Child1 = sprite::create ("Images/grossini.png");

AddChild (child1,0,2);

Rect r1 = director::getinstance ()->getopenglview ()->getvisiblerect ();

VEC2 v2 = Vec2 (r1.origin.x+300,r1.origin.y/2+r1.size.height-300);

Child1->setposition (v2);

Child1->runaction (Sequence::create (Moveby::create (1,VEC2 (150,0)), Callfuncn::create (CC_CALLBACK_1 (HelloWorld :: Update1,this)), nullptr);

void Helloworld::update1 (node* Node) {

Node->stopallactions ();

Node->runaction (Scaleto::create (2,2));

RemoveChild (node);

}

Three, Cc_schedule_selector first perform an action and then perform an action on a regular basis

Auto Child2 = sprite::create ("Images/grossini.png");

AddChild (child2,0,121);

Rect r1 = director::getinstance ()->getopenglview ()->getvisiblerect ();

VEC2 v2 = Vec2 (r1.origin.x + 300,R1.ORIGIN.Y/2 + r1.size.height-300);

Child2->setposition (v2);

Auto action = moveby::create (1,VEC2 (150,0));

Auto director = Director::getinstance ();

Director->getactionmanager ()->addaction (action,child2,true);

Schedule (Cc_schedule_selector (Helloworld::unpause), 3);//3 seconds after the Unpause method is executed

void Helloworld::unpause (float dt) {

Unschedule (Cc_schedule_selector (helloworld::unpause));

Auto node =getchildbytag (121);

Auto director = Director::getinstance ();

ccaction* action1 = ccrotateby::create (1, 360);

Director->getactionmanager ()->resumetarget (node);

Node->runaction (Action1);

}

Iv. Stop action after performing an action

Auto Child2 = sprite::create ("Images/grossini.png");

Rect r1 = director::getinstance ()->getopenglview ()->getvisiblerect ();

VEC2 v2 = Vec2 (r1.origin.x +300,r1.origin.y/2 +r1.size.height-300);

Child2->setposition (v2);

AddChild (child2,0,111);

    Auto Pmove = moveby::create (2,