Class: CALayer

Inherits:

NSObject

• Object
• NSObject
• CALayer

show all

Overview

Instance Attribute Summary (collapse)

• - actions

  A dictionary mapping keys to objects that implement the CAAction protocol.

• - anchorPoint

  Defines the anchor point of the layer’s bounds rectangle.

• - anchorPointZ

  The Z component of the layer's anchor point.

• - backgroundColor

  Specifies the background color of the receiver.

• - backgroundFilters

  An optional array of CoreImage filters that are applied to the receiver’s background.

• - borderColor

  The color of the receiver’s border.

• - borderWidth

  Specifies the width of the receiver’s border.

• - bounds

  Specifies the bounds rectangle of the receiver.

• - compositingFilter

  A CoreImage filter used to composite the receiver’s contents with the background.

• - contents

  An object that provides the contents of the layer.

• - contentsCenter

  Specifies the area of the content image that should be scaled.

• - contentsGravity

  Determines how the receiver’s contents are positioned within its bounds.

• - contentsRect

  A rectangle, in the unit coordinate space, defining the sub-rectangle of contents that the receiver should draw.

• - contentsScale

  The scale factor applied to the layer.

• - cornerRadius

  Specifies a radius used to draw the rounded corners of the receiver’s background.

• - delegate

  Specifies the receiver’s delegate object.

• - doubleSided

  Determines whether the receiver is displayed when facing away from the viewer.

• - drawsAsynchronously

  A Boolean indicating whether drawing commands are deferred and processed asynchronously in a background thread.

• - edgeAntialiasingMask

  A bitmask defining how the edges of the receiver are rasterized.

• - filters

  An array of CoreImage filters that are applied to the contents of the receiver and its sublayers.

• - frame

  Specifies receiver’s frame rectangle in the super-layer’s coordinate space.

• - geometryFlipped

  Determines if the geometry of the layer and its sublayers are flipped vertically.

• - hidden

  Determines whether the receiver is displayed.

• - magnificationFilter

  The filter used when increasing the size of the content.

• - mask

  An optional layer whose alpha channel is used as a mask to select between the layer's background and the result of compositing the layer's contents with its filtered background.

• - masksToBounds

  Determines if the sublayers are clipped to the receiver’s bounds.

• - minificationFilter

  The filter used when reducing the size of the content.

• - minificationFilterBias

  The bias factor used by the minification filter to determine the levels of detail.

• - name

  The name of the receiver.

• - needsDisplayOnBoundsChange

  Returns whether the receiver must be redisplayed when the bounds rectangle is updated.

• - opacity

  Determines the opacity of the receiver.

• - opaque

  This property affects how the layer creates the content directly.

• - position

  Specifies the receiver’s position in the superlayer’s coordinate system.

• - rasterizationScale

  The scale at which to rasterize content, relative to the coordinate space of the layer.

• - shadowColor

  Specifies the color of the receiver’s shadow.

• - shadowOffset

  Specifies the offset of the receiver’s shadow.

• - shadowOpacity

  Specifies the opacity of the receiver’s shadow.

• - shadowPath

  Defines the shape of the shadow.

• - shadowRadius

  Specifies the blur radius used to render the receiver’s shadow.

• - shouldRasterize

  A Boolean that indicates whether the layer is rendered as a bitmap before compositing.

• - style

  An optional dictionary referenced to find property values that aren’t explicitly defined by the receiver.

• - sublayers

  An array containing the receiver's sublayers.

• - sublayerTransform

  Specifies a transform applied to each sublayer when rendering.

• - superlayer readonly

  Specifies receiver's superlayer.

• - transform

  Specifies the transform applied to the receiver, relative to the center of its bounds.

• - visibleRect readonly

  Returns the visible region of the receiver, in its own coordinate space.

• - zPosition

  Specifies the receiver’s position on the z axis.

Class Method Summary (collapse)

• + defaultActionForKey:

  Returns an object that implements the default action for the specified identifier.

• + defaultValueForKey:

  Specifies the default value of the property with the specified key.

• + layer

  Creates and returns an instance of the layer object.

• + needsDisplayForKey:

  Returns whether changes to the specified key requires the layer to be redisplayed.

Instance Method Summary (collapse)

• - actionForKey:

  Returns an object that implements the action for the specified identifier.

• - addAnimation:forKey:

  Add an animation object to the receiver’s render tree for the specified key.

• - addSublayer:

  Appends the layer to the receiver’s sublayers array.

• - affineTransform

  Convenience method for getting the transform property as an affine transform.

• - animationForKey:

  Returns the animation added to the receiver with the specified identifier.

• - animationKeys

  Returns an array containing the keys of all animations currently attached to the receiver.

• - containsPoint:

  Returns whether the receiver contains a specified point.

• - contentsAreFlipped

  Returns whether the layer content is implicitly flipped when rendered.

• - convertPoint:fromLayer:

  Converts the point from the specified layer’s coordinate system to the receiver’s coordinate system.

• - convertPoint:toLayer:

  Converts the point from the receiver’s coordinate system to the specified layer’s coordinate system.

• - convertRect:fromLayer:

  Converts the rectangle from the specified layer’s coordinate system to the receiver’s coordinate system.

• - convertRect:toLayer:

  Converts the rectangle from the receiver’s coordinate system to the specified layer’s coordinate system.

• - convertTime:fromLayer:

  Converts the time interval from the specified layer’s time space to the receiver’s time space.

• - convertTime:toLayer:

  Converts the time interval from the receiver’s time space to the specified layer’s time space.

• - display

  Reload the content of this layer.

• - displayIfNeeded

  Displays the layer if it has been marked as needing display.

• - drawInContext:

  Draws the receiver’s content in the specified graphics context.

• - hitTest:

  Returns the farthest descendant of the receiver in the layer hierarchy (including itself) that contains a specified point.

• - init

  Returns an initialized CALayer object.

• - initWithLayer:

  Override to copy or initialize custom fields of the specified layer.

• - insertSublayer:above:

  Inserts the layer into the receiver’s sublayers array, above the specified sublayer.

• - insertSublayer:atIndex:

  Inserts the layer as a sublayer of the receiver at the specified index.

• - insertSublayer:below:

  Inserts the layer into the receiver’s sublayers array, below the specified sublayer.

• - layoutIfNeeded

  Recalculate the receiver’s layout, if required.

• - layoutSublayers

  Called when the layer requires layout.

• - modelLayer

  Returns the model layer of the receiver, if it represents a current presentation layer.

• - needsDisplay

  Returns whether the layer has been marked as requiring display.

• - needsLayout

  Returns whether the layer has been marked as requiring layout.

• - preferredFrameSize

  Returns the preferred frame size of the layer in the coordinate space of the superlayer.

• - presentationLayer

  Returns a copy of the layer containing all properties as they were at the start of the current transaction, with any active animations applied.

• - removeAllAnimations

  Remove all animations attached to the receiver.

• - removeAnimationForKey:

  Remove the animation attached to the receiver with the specified key.

• - removeFromSuperlayer

  Removes the layer from the sublayers array or mask property of the receiver’s superlayer.

• - renderInContext:

  Renders the receiver and its sublayers into the specified context.

• - replaceSublayer:with:

  Replaces the layer in the receiver’s sublayers array with the specified new layer.

• - scrollPoint:

  Scrolls the receiver’s closest ancestor CAScrollLayer so that the specified point lies at the origin of the layer.

• - scrollRectToVisible:

  Scrolls the receiver’s closest ancestor CAScrollLayer the minimum distance needed so that the specified rectangle becomes visible.

• - setAffineTransform:

  Convenience method for setting the transform property as an affine transform.

• - setNeedsDisplay

  Marks the receiver as needing display before the content is next committed.

• - setNeedsDisplayInRect:

  Marks the region of the receiver within the specified rectangle as needing display.

• - setNeedsLayout

  Called when the preferred size of the receiver may have changed.

• - shouldArchiveValueForKey:

  Specifies whether the value of the property for a given key is archived.

Methods inherited from NSObject

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Defaults to nil.