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

SCIPinchZoomModifier

@interface SCIPinchZoomModifier : SCIGestureModifierBase

The SCIPinchZoomModifier provides zooming of the SCIChartSurface with the pinch gesture.




gestureRecognizer

Defines UIPinchGestureRecognizer which is used to detect pinch gestures.

Declaration

Objective-C

@property (nonatomic, weak, readonly, nullable) UIPinchGestureRecognizer *gestureRecognizer;

Swift

weak var gestureRecognizer: UIPinchGestureRecognizer? { get }

scaleFactor
Defines the scale factor to scale (or shrink) both axes on pinch gesture.
Declaration
Objective-C

@property (nonatomic) CGFloat scaleFactor;
Swift

var scaleFactor: CGFloat { get set }
direction
Defines the SCIDirection2D which restricts zoom interactivity to.
Declaration
Objective-C

@property (nonatomic) SCIDirection2D direction;
Swift

var direction: SCIDirection2D { get set }
isUniformZoom
Defines the value which indicates whether uniform zoom should be used by this modifier.

Note
When uniform zoom is set to YES - then modifier applies same scale factor for both x and y direction, otherwise - scale factor calculated separately for x and y direction based on information from touch events.
Declaration
Objective-C

@property (nonatomic) BOOL isUniformZoom;
Swift

var isUniformZoom: Bool { get set }