Core Animation Programming Guide

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1、CoreAnimationProgrammingGuideContentsAboutCoreAnimation9AtaGlance9CoreAnimationManagesYourApp’sContent10LayerModificationsTriggerAnimations10LayersCanBeOrganizedintoHierarchies10ActionsLetYouChangeaLayer’sDefaultBehavior10HowtoUseThisDocument11Prerequisites11SeeAlso11CoreAnimationBasics12LayersProvi

2、detheBasisforDrawingandAnimations12TheLayer-BasedDrawingModel12Layer-BasedAnimations13LayerObjectsDefineTheirOwnGeometry14LayersUseTwoTypesofCoordinateSystems15AnchorPointsAffectGeometricManipulations17LayersCanBeManipulatedinThreeDimensions19LayerTreesReflectDifferentAspectsoftheAnimationState21The

3、RelationshipBetweenLayersandViews24SettingUpLayerObjects26EnablingCoreAnimationSupportinYourApp26ChangingtheLayerObjectAssociatedwithaView27ChangingtheLayerClassUsedbyUIView27ChangingtheLayerClassUsedByNSView28LayerHostingLetsYouChangetheLayerObjectinOSX28DifferentLayerClassesProvideSpecializedBehav

4、iors29ProvidingaLayer’sContents30UsinganImagefortheLayer’sContent30UsingaDelegatetoProvidetheLayer’sContent30ProvidingLayerContentThroughSubclassing32TweakingtheContentYouProvide33WorkingwithHigh-ResolutionImages352013-01-28

5、Copyright©2013AppleInc.AllRightsReserved.2ContentsAdjustingaLayer’sVisualSt

6、yleandAppearance35LayersHaveTheirOwnBackgroundandBorder36LayersSupportaCornerRadius37LayersSupportBuilt-InShadows38FiltersAddVisualEffectstoOSXViews39TheLayerRedrawPolicyforOSXViewsAffectsPerformance40AddingCustomPropertiestoaLayer42PrintingtheContentsofaLayer-BackedView42AnimatingLayerContent43Anim

7、atingSimpleChangestoaLayer’sProperties43UsingaKeyframeAnimationtoChangeLayerProperties45SpecifyingKeyframeValues46SpecifyingtheTimingofaKeyframeAnimation46StoppinganExplicitAnimationWhileItIsRunning47AnimatingMultipleChangesTogether48DetectingtheEndofanAnimation49HowtoAnimateLayer-BackedViews50Rules

8、forModifyingLayersiniOS50RulesforModifyingLayersinOSX51RemembertoUpdateViewConstraintsasPartofYourAnimation52BuildingaLayerHierarchy53ArrangingLayersintoaLayerHierarchy53Adding,Inserting,andRemovingSu