AGSPointCollection Class Reference

Description

Represents vertices (immutable collection of points) of a single part of a multipart geometry (AGSMultipart).

Instances of this class represent the vertices of a single part of a multipart geometry (AGSMultipart). For example, polygons have multiple parts where each part is a ring and polylines have multiple parts where each part is a line. Each part is composed of a sequence of points. All points must have the same spatial reference.

Since

100

See also

AGSMultipart for multipart geometries

AGSPartCollection for parts of a multipart geometry

Inheritance diagram for AGSPointCollection:

Instance Methods
(NSArray< AGSPoint * > *)	- array
(void)	- enumerateXYCoordinatesUsingBlock:
(NSInteger)	- indexOfPoint:
(AGSPoint *)	- objectAtIndexedSubscript:
(AGSPoint *)	- pointAtIndex:
(AGSEnumerator *)	- pointEnumerator

Properties
NSInteger	count
BOOL	empty
AGSSpatialReference *	spatialReference

Method Documentation

array

- (NSArray<AGSPoint*>*) array

Returns an array of points.

Since

100

enumerateXYCoordinatesUsingBlock:

- (void) enumerateXYCoordinatesUsingBlock:

(void(^)(NSUInteger index, double x, double y))

block

Allows you to enumerate the X and Y coordinates of this point collection with a block. This is faster than other ways of enumerating the part that give out AGSPoint instances.

Since

100.5

indexOfPoint:

- (NSInteger) indexOfPoint:

(AGSPoint *)

point

Returns the index of the specified point.

Parameters

point

The point whose index needs to be located.

Returns

An index of specified point

Since

100

objectAtIndexedSubscript:

- (AGSPoint*) objectAtIndexedSubscript:

(NSInteger)

idx

Returns the vertex at the specified index. Supports accessing an individual vertex using array-style subscript expressions.

AGSPolygon* polygon = ... ; //polygon with 2 parts (rings)
AGSPartCollection* parts = polygon.parts;
AGSPointCollection* part = [parts partAtIndex:0]; //The 0th part
AGSPoint* vertex = part[0]; //The 0th vertex in the part

Parameters

idx	An index within the bounds of the collection.

Returns

The vertex located at the index

Since

100

pointAtIndex:

- (AGSPoint*) pointAtIndex:

(NSInteger)

index

Returns the vertex at the specified index.

Parameters

index

An index within the bounds of the collection.

Returns

The vertex located at the index

Since

100

pointEnumerator

- (AGSEnumerator*) pointEnumerator

Returns an enumerator object that lets you access each object in the point collection.

Since

100

Property Documentation

count

- (NSInteger) count

readnonatomicassign

The number of points in this collection.

Since

100

empty

- (BOOL) empty

readnonatomicassign

Determinse whether the collection is empty or not.

Since

100

spatialReference

- (AGSSpatialReference*) spatialReference

readnonatomicstrong

The spatial reference associated with the collection. It specifies the coordinate system for the geometry's x, y, and z coordinate values.

Since

100

Note

Geometries that represent geographic locations should always have a spatial reference. Otherwise the coordinates of the geometry are meaningless.