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

SCIColorMap

@interface SCIColorMap : NSObject

Defines a color map for SCIFastUniformHeatmapRenderableSeries.




colors

The color map colors.

Declaration

Objective-C

@property (nonatomic, strong, readonly) NSArray<UIColor *> *_Nonnull colors;

Swift

var colors: [UIColor] { get }




stops

The color map stop points.

Declaration

Objective-C

@property (nonatomic, strong, readonly) NSArray<NSNumber *> *_Nonnull stops;

Swift

var stops: [NSNumber] { get }




-initWithColors:andStops:

Creates a new instance of SCIColorMap class.

Declaration

Objective-C

- (nonnull instancetype)initWithColors:(nonnull NSArray<UIColor *> *)colors
                              andStops:(nonnull NSArray<NSNumber *> *)stops;

Swift

init(colors: [UIColor], andStops stops: [NSNumber])

Parameters

`colors`	The colors used by this color map.
`stops`	The stops used by this color map.




-initWithStartColor:endColor:

Creates a new instance of SCIColorMap class.

Declaration

Objective-C

- (nonnull instancetype)initWithStartColor:(nonnull UIColor *)startColor
                                  endColor:(nonnull UIColor *)endColor;

Swift

init(start startColor: UIColor, end endColor: UIColor)

Parameters

`startColor`	The start color.
`endColor`	The end color.

-lerpColorForValue:
Interpolates a data-value in a SCIColorMap.
Declaration
Objective-C

- (nonnull UIColor *)lerpColorForValue:(double)value;
Swift

func lerpColor(forValue value: Double) -> UIColor
Parameters

value

The value to interpolate color for.

Return Value

A linear interpolated color.




+createColorMapBitmap:width:height:

Helper method which creates SCIIntegerValues bitmap data from SCIColorMap instance.

Declaration

Objective-C

+ (nonnull SCIUnsignedIntegerValues *)createColorMapBitmap:
                                          (nonnull SCIColorMap *)colorMap
                                                     width:(int)width
                                                    height:(int)height;

Swift

class func createColorMapBitmap(_ colorMap: SCIColorMap, width: Int32, height: Int32) -> SCIUnsignedIntegerValues

Parameters

`colorMap`	The color map.
`width`	The width of bitmap.
`height`	The height of bitmap.

Return Value

The SCIUnsignedIntegerValues bitmap data.