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

The SCIPinchZoomModifier

SciChart iOS provides pinch zooming via the SCIPinchZoomModifier, available out of the box.

Besides common features which are inherited from the SCIChartModifierBase class, the SCIPinchZoomModifier allows to control its specific features via the following properties:

SCIPinchZoomModifier.scaleFactor - allows to set ScaleFactor to change zooming speed.
SCIPinchZoomModifier.direction - allows to restrict zooming to the horizontal or vertical direction only if needed.

Adding a SCIPinchZoomModifier to a Chart

Any Chart Modifier can be added to a SCIChartSurface via the ISCIChartSurface.chartModifiers property and SCIPinchZoomModifier with no difference:

    // Assume a surface has been created and configured somewhere
    id<ISCIChartSurface> surface;

    // Create a Modifier
    SCIPinchZoomModifier *pinchZoomModifier = [SCIPinchZoomModifier new];
    pinchZoomModifier.direction = SCIDirection2D_XDirection;
    pinchZoomModifier.scaleFactor = 1.5;

    // Add the modifier to the surface
    [self.surface.chartModifiers add:pinchZoomModifier];

    // Assume a surface has been created and configured somewhere
    let surface: ISCIChartSurface

    // Create a Modifier
    let pinchZoomModifier = SCIPinchZoomModifier()
    pinchZoomModifier.direction = .xDirection
    pinchZoomModifier.scaleFactor = 1.5

    // Add the modifier to the surface
    self.surface.chartModifiers.add(pinchZoomModifier)

    // Assume a surface has been created and configured somewhere
    IISCIChartSurface surface;

    // Create a Modifier
    var pinchZoomModifier = new SCIPinchZoomModifier();
    pinchZoomModifier.Direction = SCIDirection2D.XDirection;
    pinchZoomModifier.scaleFactor = 1.5;

    // Add the modifier to the surface
    Surface.ChartModifiers.Add(pinchZoomModifier);

NOTE: To learn more about features available, please visit the Chart Modifier APIs article.