COCOS2D API 之 CompositionAction
Actions: Composition
There are some actions that let you compose actions.
-
Sequence actionSpawn actionRepeat actionRepeatForever action
Sequence
The
CCSequenceaction is a list of actions. The actions are executed in the order that they are defined.Example:
id action1 = [CCMoveTo actionWithDuration:2 position:ccp(100,100)]; id action2 = [CCMoveBy actionWithDuration:2 position: ccp(80,80)]; id action3 = [CCMoveBy actionWithDuration:2 position: ccp(0,80)]; [sprite runAction: [CCSequence actions:action1, action2, action3, nil]];
The
action1will be executed first. Whenaction1finishes, thenaction2will be executed. And whenaction2finishes, only thenaction3will be executed.*IMPORTANT:* The inner actions should have a non-infinite time (e.g.: You can't add a
CCRepeatForeveraction in aCCSequenceaction).Spawn
The
CCSpawnaction lets you run several actions at the same time. The duration of theCCSpawnaction will be the duration of the longest sub-action.id action = [CCSpawn actions: [CCJumpBy actionWithDuration:2 position:ccp(300,0) height:50 jumps:4], [CCRotateBy actionWithDuration: 2 angle: 720], nil]; [sprite runAction:action];
Repeat
The
CCRepeataction lets you repeat an action a limited number of times. Example:id a1 = [CCMoveBy actionWithDuration:1 position:ccp(150,0)]; id action1 = [CCRepeat actionWithAction: [CCSequence actions: [CCPlace actionWithPosition:ccp(60,60)], a1, nil] times:3]; [sprite runAction:action1];
RepeatForever
The
CCRepeatForeveraction is a special action. Since it will repeat an action forever, its duration can't be measured.Example:
id a1 = [CCMoveBy actionWithDuration:1 position:ccp(150,0)]; id action2 = [CCRepeatForever actionWithAction: [CCSequence actions: [[a1 copy] autorelease], [a1 reverse], nil] ]; [sprite runAction:action2];
*IMPORTANT*:
CCRepeatForeveris not a validCCIntervalAction. You can't use aCCRepeatForeverinside aCCSequenceaction.