CPTAnnotation Class Reference

An annotation positions a content layer relative to some anchor point. More...

#import <CPTAnnotation.h>

Inheritance diagram for CPTAnnotation:

Collaboration diagram for CPTAnnotation:

Public Instance Methods
Initialization
(nonnull instancetype)	- init
	Initializes a newly allocated CPTAnnotation object. More...
(nullable instancetype)	- initWithCoder:
Layout
(void)	- positionContentLayer
	Positions the content layer relative to its reference anchor. More...
Public Instance Methods inherited from NSObject
(Class)	- classForCoder
(id)	- copy
(void)	- dealloc
(void)	- finalize
(id)	- init
(id)	- mutableCopy
Public Instance Methods inherited from <NSObject>
(NSString *)	- description
(NSUInteger)	- hash
(BOOL)	- isEqual:
Public Instance Methods inherited from <NSCoding>
(id)	- initWithCoder:
(void)	- encodeWithCoder:

Properties
CPTLayer *	contentLayer
	The annotation content. More...
CPTAnnotationHostLayer *	annotationHostLayer
	The host layer for the annotation content. More...
CGPoint	contentAnchorPoint
	The anchor point for the content layer. More...
CGPoint	displacement
	The displacement from the layer anchor point. More...
CGFloat	rotation
	The rotation of the label in radians. More...

Additional Inherited Members
Public Class Methods inherited from NSObject
(id)	+ alloc
(Class)	+ class
(void)	+ initialize
(void)	+ load
(id)	+ new
Public Class Methods inherited from <NSSecureCoding>
(BOOL)	+ supportsSecureCoding:

Detailed Description

An annotation positions a content layer relative to some anchor point.

Annotations can be used to add text or images that are anchored to a feature of a graph. For example, the graph title is an annotation anchored to the graph. The annotation content layer can be any CPTLayer.

Method Documentation

init

- (nonnull instancetype) init

Initializes a newly allocated CPTAnnotation object.

The initialized object will have the following properties:

• annotationHostLayer = nil
• contentLayer = nil
• displacement = (0.0, 0.0)
• contentAnchorPoint = (0.5, 0.5)
• rotation = 0.0

Returns

The initialized object.

initWithCoder:

- (nullable instancetype) initWithCoder:

(nonnull NSCoder *)

coder

Reimplemented in CPTLayerAnnotation, and CPTPlotSpaceAnnotation.

positionContentLayer

- (void) positionContentLayer

Positions the content layer relative to its reference anchor.

This method must be overridden by subclasses. The default implementation does nothing.

Provided by category CPTAnnotation(AbstractMethods).

Property Documentation

annotationHostLayer

- (nullable CPTAnnotationHostLayer *) annotationHostLayer

readwritenonatomicweak

The host layer for the annotation content.

contentAnchorPoint

- (CGPoint) contentAnchorPoint

readwritenonatomicassign

The anchor point for the content layer.

contentLayer

- (nullable CPTLayer *) contentLayer

readwritenonatomicstrong

The annotation content.

displacement

- (CGPoint) displacement

readwritenonatomicassign

The displacement from the layer anchor point.

rotation

- (CGFloat) rotation

readwritenonatomicassign

The rotation of the label in radians.

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The documentation for this class was generated from the following files:

• Source/CPTAnnotation.h
• Source/CPTAnnotation.m