iOS & macOS Charting Documentation - SciChart iOS & macOS Charts SDK v4.x

SCIProjectionCollection

@interface SCIProjectionCollection<__covariant T, __covariant TSource>
    : SCIObservableCollection <T>

Defines special read-only collection which projects items of one collection into another collection according to specified transform function.

Note

T - is the type of items to project to.

Note

TSource - is the type of source items which need to be projected.

-initWithProjectionFunc:
Creates a new SCIProjectionCollection instance with specified projection function.
Declaration
Objective-C

- (nonnull instancetype)initWithProjectionFunc:(nonnull SCIFunc1)func;
Swift

init(projectionFunc func: @escaping SCIFunc1)
Parameters

func

The function which transforms item from source collection to target item.




-initWithSourceCollection:projectionFunc:

Creates a new SCIProjectionCollection instance with specified projection function.

Declaration

Objective-C

- (nonnull instancetype)initWithSourceCollection:
                            (nonnull SCIObservableCollection *)collection
                                  projectionFunc:(nonnull SCIFunc1)func;

Swift

init(sourceCollection collection: SCIObservableCollection<AnyObject>, projectionFunc func: @escaping SCIFunc1)

Parameters

`collection`	The source collection to project from.
`func`	The function which transforms item from source collection to target item.




sourceCollection

Defines the source collection which is used to project from.

Declaration

Objective-C

@property (nonatomic, weak) SCIObservableCollection<TSource> *_Nullable sourceCollection;

Swift

weak var sourceCollection: SCIObservableCollection<TSource>? { get set }