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继承自： CCScene:CCNode:CCResponder:NSObject
声明自： CCTranslation.h
概述：
A transition animates the presentation of a new scene while moving the current scene out of view. A transition is optionally played when calling one of the presentScene:withTransition: methods of CCDirector.
当从view中移出当前scene时，transition激活一个新的scene显示。在调用CCDirector的prensentScene:withTransition方法时，transition是可选的参数.
Note: Since both scenes remain in memory and are being rendered, a transition may raise performance issues or memory warnings. If two complex scenes can not be reliably transitioned from/to it is best to not use transitions or to introduce an in-between scene that is presented only for a short period of time (ie a loading scene or merely a “fade to black” scene).
注意：在底层，所有的scenes都保留在内存中，transition可以会引发性能问题或内存警告。如果两个复杂的scenes不能有效的被transition，那么最好不要使用transitions或者引入一个仅仅会显示短时间的内置scene（比如载入scene或者渐渐变黑scene）。
+ transitionCrossFadeWithDuration:+ transitionFadeWithColor:duration:+ transitionFadeWithDuration:+ transitionMoveInWithDirection:duration:+ transitionPushWithDirection:duration:+ transitionRevealWithDirection:duration: outgoingDownScale property incomingDownScale property retinaTransition property transitionPixelFormat property transitionDepthStencilFormat property outgoingSceneAnimated property incomingSceneAnimated property
Will downscale incoming scene. Can be used as an effect, or to decrease render time on complex scenes. Default 1.0.
@property (nonatomic, assign) float incomingDownScaleCCTransition.hDefines whether incoming scene will be animated during transition. Default NO.
定义传入的scene在transition的过程中是否会被激活，默认为NO。
@property (nonatomic, getter=isIncomingSceneAnimated) BOOL incomingSceneAnimatedCCTransition.hWill downscale outgoing scene. Can be used as an effect, or to decrease render time on complex scenes. Default 1.0.
可以缩减传出scene的规模。可以用作一个效果，或者在复杂scenes上减少底层处理所需的时间。
@property (nonatomic, assign) float outgoingDownScaleCCTransition.hDefines whether outgoing scene will be animated during transition. Default NO.
定义传出场景在transition过程中是否会被激活。默认NO
@property (nonatomic, getter=isOutgoingSceneAnimated) BOOL outgoingSceneAnimatedCCTransition.hNormalized (percentage) transition progress in the range 0.0 to 1.0.
把transition的进度规范化在0.0到1.0的范围内（百分比形式）
@property (nonatomic, readonly) float progressCCTransition.hTransition will be performed in retina resolution. Will force outgoingDownScale and incomingDownScale to 1.0 on non retina devices, and 2.0 on retina devices if not set. Default YES.
@property (nonatomic, getter=isRetinaTransition) BOOL retinaTransitionCCTransition.hThe actual transition runtime in seconds.
实际的transition运行时间。
@property (nonatomic, readonly) NSTimeInterval runTimeCCTransition.hDepth/stencil format used for transition. Default GL_DEPTH24_STENCIL8_OES.
@property (nonatomic, assign) GLuint transitionDepthStencilFormatCCTransition.hPixel format used for transition. Default CCTexturePixelFormat_RGBA8888.
@property (nonatomic, assign) CCTexturePixelFormat transitionPixelFormatCCTransition.hCreates a cross fade transition directly from outgoing to incoming scene.
创建一个交叉渐变transition。（旧场景 alpha 值从 1 变为 0，新场景的 alpha 值从 0 变为 1，两个 cross 在一起）
+ (CCTransition *)transitionCrossFadeWithDuration:(NSTimeInterval)durationThe duration of the transition in seconds.
The CCTransition Object.
CCTransition.hCreates a fade transition from outgoing to incoming scene, through color.
创建一个渐变transition，通过一个color场景。（先从旧场景 cross fade 到这个颜色场景，再从颜色场景 cross fade 到新场景）
+ (CCTransition *)transitionFadeWithColor:(CCColor *)color duration:(NSTimeInterval)durationThe color to fade through
The duration of the transition in seconds.
The CCTransition Object.
CCTransition.hCreates a fade transition from outgoing to incoming scene, through black.
穿件一个渐变transition，通过一个black场景.
+ (CCTransition *)transitionFadeWithDuration:(NSTimeInterval)durationThe duration of the transition in seconds.
The CCTransition Object.
CCTransition.hCreates a transition where the incoming scene is moved in over the outgoing scene.
创建一个transtion(效果是新scene像盖子一样挪过来盖在旧scene上面）
注：CCTransitionDirection：
typedef NS_ENUM(NSInteger, CCTransitionDirection ) {
CCTransitionDirectionUp,
CCTransitionDirectionDown,
CCTransitionDirectionRight,
CCTransitionDirectionLeft,
CCTransitionDirectionInvalid = -1,
};
+ (CCTransition *)transitionMoveInWithDirection:(CCTransitionDirection)direction duration:(NSTimeInterval)durationDirection to move the incoming scene.
The duration of the transition in seconds.
The CCTransition Object.
CCTransition.hCreates a transition where the incoming scene pushed the outgoing scene out.
效果是新scene把旧scene推走，平行移动。
+ (CCTransition *)transitionPushWithDirection:(CCTransitionDirection)direction duration:(NSTimeInterval)durationDirection to move incoming and outgoing scenes.
The duration of the transition in seconds.
The CCTransition Object.
CCTransition.hCreates a transition where the incoming scene is revealed by sliding the outgoing scene out.
旧场景盖在新场景下面，然后像揭盖子一样把旧的揭掉，新的就露出来了。与 move in 相反，一个是新场景盖过来，一个是老场景揭出去。
+ (CCTransition *)transitionRevealWithDirection:(CCTransitionDirection)direction duration:(NSTimeInterval)durationDirection to slide outcoing scene.
The duration of the transition in seconds.
The CCTransition Object.
CCTransition.hCCTransition类--Cocos2D-Swift v3.3
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原文地址：http://www.cnblogs.com/somebod-Y/p/4264114.html
