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iOS Chart Annotations are Easy!
// iOS Chart Examples
SciChart’s iOS Chart library ships with ~60 Objective-C and Swift 4 iOS Chart Examples which you can browse, play with, view the source-code and even export each iOS Objective-C / Swift Chart Example to a stand-alone XCode project. All of this is possible with the new and improved SciChart iOS Examples Suite, which ships as part of the SciChart iOS SDK.
An introduction to the SciChart iOS Charts Annotations API, which allows UIView elements to be placed over the iOS Chart at specific X and Y data-values.
This can be used to display Text Labels, Boxes, Lines and Custom markers over the chart at specific X,Y locations as well as Watermarks or other custom UI at specific points on the viewport.
Annotation Types Include:
– AxisMarkerAnnotation
– BoxAnnotation
– CustomAnnotation
– HorizontalLineAnnotation
– LineAnnotation
– LineArrowAnnotation
– TextAnnotation
– VerticalLineAnnotation
Documentation Links
– iOS Annotations API Documentation
– Combining Multiple Annotations
– iOS Annotations Module – Doxygen
// Source Code
The Swift 4 and Objective-C source code for the iOS Chart Annotations are Easy! example is included below (Scroll down!).
Did you know you can also view the source code from one of the following sources as well?
- Clone the SciChart.iOS.Examples from Github.
- Or, view source and export each example to an XCode project from the Obj-C version of the SciChart iOS Examples app.
- Also the SciChart iOS Trial contains the full source for the examples (link below).
// AnnotationsChartView.m
//******************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2018. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales: sales@scichart.com
//
// AnnotationsChartView.m is part of the SCICHART® Examples. Permission is hereby granted
// to modify, create derivative works, distribute and publish any part of this source
// code whether for commercial, private or personal use.
//
// The SCICHART® examples are distributed in the hope that they will be useful, but
// without any warranty. It is provided "AS IS" without warranty of any kind, either
// expressed or implied.
//******************************************************************************
#import "AnnotationsChartView.h"
@implementation AnnotationsChartView
- (void)initExample {
SCINumericAxis * xAxis = [SCINumericAxis new];
xAxis.growBy = [[SCIDoubleRange alloc] initWithMin:SCIGeneric(0.1) Max:SCIGeneric(0.1)];
xAxis.visibleRange = [[SCIDoubleRange alloc] initWithMin:SCIGeneric(0.0) Max:SCIGeneric(10.0)];
SCINumericAxis * yAxis = [SCINumericAxis new];
yAxis.growBy = [[SCIDoubleRange alloc] initWithMin:SCIGeneric(0.1) Max:SCIGeneric(0.1)];
yAxis.visibleRange = [[SCIDoubleRange alloc] initWithMin:SCIGeneric(0.0) Max:SCIGeneric(10.0)];
[SCIUpdateSuspender usingWithSuspendable:self.surface withBlock:^{
[self.surface.xAxes add:xAxis];
[self.surface.yAxes add:yAxis];
// Watermark
SCITextAnnotation * watermark = [SCITextAnnotation new];
watermark.coordinateMode = SCIAnnotationCoordinate_Relative;
watermark.x1 = SCIGeneric(0.5);
watermark.y1 = SCIGeneric(0.5);
watermark.text = @"Create \n Watermarks";
watermark.horizontalAnchorPoint = SCIHorizontalAnchorPoint_Center;
watermark.verticalAnchorPoint = SCIHorizontalAnchorPoint_Center;
watermark.style.textColor = [UIColor fromARGBColorCode:0x22FFFFFF];
watermark.style.textStyle.fontSize = 42;
watermark.style.backgroundColor = UIColor.clearColor;
// Text annotations
SCITextAnnotation * textAnnotation1 = [SCITextAnnotation new];
textAnnotation1.x1 = SCIGeneric(0.3);
textAnnotation1.y1 = SCIGeneric(9.7);
textAnnotation1.text = @"Annotations are Easy!";
textAnnotation1.style.textColor = UIColor.whiteColor;
textAnnotation1.style.textStyle.fontSize = 24;
textAnnotation1.style.backgroundColor = UIColor.clearColor;
SCITextAnnotation * textAnnotation2 = [SCITextAnnotation new];
textAnnotation2.x1 = SCIGeneric(1.0);
textAnnotation2.y1 = SCIGeneric(9.0);
textAnnotation2.text = @"You can create text";
textAnnotation2.style.textColor = UIColor.whiteColor;
textAnnotation2.style.textStyle.fontSize = 10;
textAnnotation2.style.backgroundColor = UIColor.clearColor;
// Text with Anchor Points
SCITextAnnotation * textAnnotation3 = [SCITextAnnotation new];
textAnnotation3.x1 = SCIGeneric(5.0);
textAnnotation3.y1 = SCIGeneric(8.0);
textAnnotation3.text = @"Anchor Center (x1, y1)";
textAnnotation3.horizontalAnchorPoint = SCIHorizontalAnchorPoint_Center;
textAnnotation3.verticalAnchorPoint = SCIVerticalAnchorPoint_Bottom;
textAnnotation3.style.textColor = UIColor.whiteColor;
textAnnotation3.style.textStyle.fontSize = 12;
SCITextAnnotation * textAnnotation4 = [SCITextAnnotation new];
textAnnotation4.x1 = SCIGeneric(5.0);
textAnnotation4.y1 = SCIGeneric(8.0);
textAnnotation4.text = @"Anchor Right";
textAnnotation4.horizontalAnchorPoint = SCIHorizontalAnchorPoint_Right;
textAnnotation4.verticalAnchorPoint = SCIVerticalAnchorPoint_Top;
textAnnotation4.style.textColor = UIColor.whiteColor;
textAnnotation4.style.textStyle.fontSize = 12;
SCITextAnnotation * textAnnotation5 = [SCITextAnnotation new];
textAnnotation5.x1 = SCIGeneric(5.0);
textAnnotation5.y1 = SCIGeneric(8.0);
textAnnotation5.text = @"or Anchor Left";
textAnnotation5.horizontalAnchorPoint = SCIHorizontalAnchorPoint_Left;
textAnnotation5.verticalAnchorPoint = SCIVerticalAnchorPoint_Top;
textAnnotation5.style.textColor = UIColor.whiteColor;
textAnnotation5.style.textStyle.fontSize = 12;
// Line and line arrow annotations
SCITextAnnotation * textAnnotation6 = [SCITextAnnotation new];
textAnnotation6.x1 = SCIGeneric(0.3);
textAnnotation6.y1 = SCIGeneric(6.1);
textAnnotation6.text = @"Draw Lines with \nor without Arrows";
textAnnotation6.verticalAnchorPoint = SCIVerticalAnchorPoint_Bottom;
textAnnotation6.style.textColor = UIColor.whiteColor;
textAnnotation6.style.textStyle.fontSize = 12;
SCILineAnnotation * lineAnnotation = [SCILineAnnotation new];
lineAnnotation.x1 = SCIGeneric(1.0);
lineAnnotation.y1 = SCIGeneric(4.0);
lineAnnotation.x2 = SCIGeneric(2.0);
lineAnnotation.y2 = SCIGeneric(6.0);
lineAnnotation.style.linePen = [[SCISolidPenStyle alloc] initWithColorCode:0xFF555555 withThickness:2];
// Should be line annotation with arrow here
// Box annotations
SCITextAnnotation * textAnnotation7 = [SCITextAnnotation new];
textAnnotation7.x1 = SCIGeneric(3.5);
textAnnotation7.y1 = SCIGeneric(6.1);
textAnnotation7.text = @"Draw Boxes";
textAnnotation7.verticalAnchorPoint = SCIVerticalAnchorPoint_Bottom;
textAnnotation7.style.textColor = UIColor.whiteColor;
textAnnotation7.style.textStyle.fontSize = 12;
SCIBoxAnnotation * boxAnnotation1 = [SCIBoxAnnotation new];
boxAnnotation1.x1 = SCIGeneric(3.5);
boxAnnotation1.y1 = SCIGeneric(4.0);
boxAnnotation1.x2 = SCIGeneric(5.0);
boxAnnotation1.y2 = SCIGeneric(5.0);
boxAnnotation1.style.fillBrush = [[SCILinearGradientBrushStyle alloc] initWithColorCodeStart:0x550000FF finish:0x55FFFF00 direction:SCILinearGradientDirection_Vertical];
boxAnnotation1.style.borderPen = [[SCISolidPenStyle alloc] initWithColorCode:0xFF279B27 withThickness:1.0];
SCIBoxAnnotation * boxAnnotation2 = [SCIBoxAnnotation new];
boxAnnotation2.x1 = SCIGeneric(4.0);
boxAnnotation2.y1 = SCIGeneric(4.5);
boxAnnotation2.x2 = SCIGeneric(5.5);
boxAnnotation2.y2 = SCIGeneric(5.5);
boxAnnotation2.style.fillBrush = [[SCISolidBrushStyle alloc] initWithColorCode:0x55FF1919];
boxAnnotation2.style.borderPen = [[SCISolidPenStyle alloc] initWithColorCode:0xFFFF1919 withThickness:1.0];
SCIBoxAnnotation * boxAnnotation3 = [SCIBoxAnnotation new];
boxAnnotation3.x1 = SCIGeneric(4.5);
boxAnnotation3.y1 = SCIGeneric(5.0);
boxAnnotation3.x2 = SCIGeneric(6.0);
boxAnnotation3.y2 = SCIGeneric(6.0);
boxAnnotation3.style.fillBrush = [[SCISolidBrushStyle alloc] initWithColorCode:0x55279B27];
boxAnnotation3.style.borderPen = [[SCISolidPenStyle alloc] initWithColorCode:0xFF279B27 withThickness:1.0];
// Custom shapes
SCITextAnnotation * textAnnotation8 = [SCITextAnnotation new];
textAnnotation8.x1 = SCIGeneric(7.0);
textAnnotation8.y1 = SCIGeneric(6.1);
textAnnotation8.text = @"Or Custom Shapes";
textAnnotation8.verticalAnchorPoint = SCIVerticalAnchorPoint_Bottom;
textAnnotation8.style.textColor = UIColor.whiteColor;
textAnnotation8.style.textStyle.fontSize = 12;
SCICustomAnnotation * customAnnotationGreen = [SCICustomAnnotation new];
customAnnotationGreen.customView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"GreenArrow"]];
customAnnotationGreen.x1 = SCIGeneric(8);
customAnnotationGreen.y1 = SCIGeneric(5.5);
SCICustomAnnotation * customAnnotationRed = [SCICustomAnnotation new];
customAnnotationRed.customView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"RedArrow"]];
customAnnotationRed.x1 = SCIGeneric(7.5);
customAnnotationRed.y1 = SCIGeneric(5);
// Horizontal Line Annotations
SCIHorizontalLineAnnotation * horizontalLine = [SCIHorizontalLineAnnotation new];
horizontalLine.x1 = SCIGeneric(5.0);
horizontalLine.y1 = SCIGeneric(3.2);
horizontalLine.horizontalAlignment = SCIHorizontalLineAnnotationAlignment_Right;
horizontalLine.style.linePen = [[SCISolidPenStyle alloc] initWithColor:UIColor.orangeColor withThickness:2];
[horizontalLine addLabel:[self createLabelWithText:@"Right Aligned, with text on left" alignment:SCILabelPlacement_TopLeft color:UIColor.orangeColor backColor:UIColor.clearColor]];
SCIHorizontalLineAnnotation * horizontalLine1 = [SCIHorizontalLineAnnotation new];
horizontalLine1.y1 = SCIGeneric(7.5);
horizontalLine1.y1 = SCIGeneric(2.8);
horizontalLine1.style.linePen = [[SCISolidPenStyle alloc] initWithColor:UIColor.orangeColor withThickness:2];
[horizontalLine1 addLabel:[self createLabelWithText:@"" alignment:SCILabelPlacement_Axis color:UIColor.blackColor backColor:UIColor.orangeColor]];
// Vertical Line annotations
SCIVerticalLineAnnotation * verticalLine = [SCIVerticalLineAnnotation new];
verticalLine.x1 = SCIGeneric(9.0);
verticalLine.y1 = SCIGeneric(4.0);
verticalLine.verticalAlignment = SCIVerticalLineAnnotationAlignment_Bottom;
verticalLine.style.linePen = [[SCISolidPenStyle alloc] initWithColorCode:0xFFA52A2A withThickness:2];
[verticalLine addLabel:[self createLabelWithText:@"" alignment:SCILabelPlacement_Axis color:UIColor.blackColor backColor:[UIColor fromARGBColorCode:0xFFA52A2A]]];
SCIVerticalLineAnnotation * verticalLine1 = [SCIVerticalLineAnnotation new];
verticalLine1.x1 = SCIGeneric(9.5);
verticalLine1.y1 = SCIGeneric(10.0);
verticalLine1.style.linePen = [[SCISolidPenStyle alloc] initWithColorCode:0xFFA52A2A withThickness:2];
[verticalLine1 addLabel:[self createLabelWithText:@"" alignment:SCILabelPlacement_Axis color:UIColor.blackColor backColor:[UIColor fromARGBColorCode:0xFFA52A2A]]];
[verticalLine1 addLabel:[self createLabelWithText:@"Bottom-aligned" alignment:SCILabelPlacement_TopRight color:[UIColor fromARGBColorCode:0xFFA52A2A] backColor:UIColor.clearColor]];
self.surface.annotations = [[SCIAnnotationCollection alloc] initWithChildAnnotations:@[watermark, textAnnotation1, textAnnotation2,
textAnnotation3, textAnnotation4, textAnnotation5,
textAnnotation6, lineAnnotation,
textAnnotation7, boxAnnotation1, boxAnnotation2, boxAnnotation3,
textAnnotation8, customAnnotationGreen, customAnnotationRed,
horizontalLine, horizontalLine1, verticalLine, verticalLine1]];
self.surface.chartModifiers = [[SCIChartModifierCollection alloc] initWithChildModifiers:@[[SCIPinchZoomModifier new], [SCIZoomExtentsModifier new], [SCIZoomPanModifier new]]];
}];
}
- (SCILineAnnotationLabel *)createLabelWithText:(NSString *)text alignment:(SCILabelPlacement)labelPlacement color:(UIColor*)color backColor:(UIColor*)backColor {
SCILineAnnotationLabel * lineAnnotationLabel = [SCILineAnnotationLabel new];
lineAnnotationLabel.text = text;
lineAnnotationLabel.style.backgroundColor = backColor;
lineAnnotationLabel.style.labelPlacement = labelPlacement;
lineAnnotationLabel.style.textStyle.color = color;
return lineAnnotationLabel;
}
@end
// AnnotationsChartView.swift
//******************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2018. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales: sales@scichart.com
//
// AnnotationsChartView.swift is part of the SCICHART® Examples. Permission is hereby granted
// to modify, create derivative works, distribute and publish any part of this source
// code whether for commercial, private or personal use.
//
// The SCICHART® examples are distributed in the hope that they will be useful, but
// without any warranty. It is provided "AS IS" without warranty of any kind, either
// expressed or implied.
//******************************************************************************
class AnnotationsChartView: SingleChartLayout {
override func initExample() {
let xAxis = SCINumericAxis()
xAxis.growBy = SCIDoubleRange(min: SCIGeneric(0.1), max: SCIGeneric(0.1))
let yAxis = SCINumericAxis()
yAxis.growBy = SCIDoubleRange(min: SCIGeneric(0.1), max: SCIGeneric(0.1))
SCIUpdateSuspender.usingWithSuspendable(surface) {
self.surface.xAxes.add(xAxis)
self.surface.yAxes.add(yAxis)
// Watermark
let watermark = SCITextAnnotation()
watermark.coordinateMode = .relative
watermark.x1 = SCIGeneric(0.5)
watermark.y1 = SCIGeneric(0.5)
watermark.text = "Create \n Watermarks"
watermark.horizontalAnchorPoint = .center
watermark.verticalAnchorPoint = .center
watermark.style.textColor = UIColor.fromARGBColorCode(0x22FFFFFF)
watermark.style.textStyle.fontSize = 42
watermark.style.backgroundColor = UIColor.clear
// Text annotations
let textAnnotation1 = SCITextAnnotation()
textAnnotation1.x1 = SCIGeneric(0.3)
textAnnotation1.y1 = SCIGeneric(9.7)
textAnnotation1.text = "Annotations are Easy!"
textAnnotation1.style.textColor = UIColor.white
textAnnotation1.style.textStyle.fontSize = 24
textAnnotation1.style.backgroundColor = UIColor.clear
let textAnnotation2 = SCITextAnnotation()
textAnnotation2.x1 = SCIGeneric(1.0)
textAnnotation2.y1 = SCIGeneric(9.0)
textAnnotation2.text = "You can create text"
textAnnotation2.style.textColor = UIColor.white
textAnnotation2.style.textStyle.fontSize = 10
textAnnotation2.style.backgroundColor = UIColor.clear
// Text with Anchor Points
let textAnnotation3 = SCITextAnnotation()
textAnnotation3.x1 = SCIGeneric(5.0)
textAnnotation3.y1 = SCIGeneric(8.0)
textAnnotation3.text = "Anchor Center (x1, y1)"
textAnnotation3.horizontalAnchorPoint = .center
textAnnotation3.verticalAnchorPoint = .bottom
textAnnotation3.style.textColor = UIColor.white
textAnnotation3.style.textStyle.fontSize = 12
let textAnnotation4 = SCITextAnnotation()
textAnnotation4.x1 = SCIGeneric(5.0)
textAnnotation4.y1 = SCIGeneric(8.0)
textAnnotation4.text = "Anchor Right"
textAnnotation4.horizontalAnchorPoint = .right
textAnnotation4.verticalAnchorPoint = .top
textAnnotation4.style.textColor = UIColor.white
textAnnotation4.style.textStyle.fontSize = 12
let textAnnotation5 = SCITextAnnotation()
textAnnotation5.x1 = SCIGeneric(5.0)
textAnnotation5.y1 = SCIGeneric(8.0)
textAnnotation5.text = "or Anchor Left";
textAnnotation5.horizontalAnchorPoint = .left
textAnnotation5.verticalAnchorPoint = .top
textAnnotation5.style.textColor = UIColor.white
textAnnotation5.style.textStyle.fontSize = 12
// Line and line arrow annotations
let textAnnotation6 = SCITextAnnotation()
textAnnotation6.x1 = SCIGeneric(0.3)
textAnnotation6.y1 = SCIGeneric(6.1)
textAnnotation6.text = "Draw Lines with \nor without Arrows"
textAnnotation6.verticalAnchorPoint = .bottom
textAnnotation6.style.textColor = UIColor.white
textAnnotation6.style.textStyle.fontSize = 12
let lineAnnotation = SCILineAnnotation()
lineAnnotation.x1 = SCIGeneric(1.0)
lineAnnotation.y1 = SCIGeneric(4.0)
lineAnnotation.x2 = SCIGeneric(2.0)
lineAnnotation.y2 = SCIGeneric(6.0)
lineAnnotation.style.linePen = SCISolidPenStyle(colorCode: 0xFF555555, withThickness: 2)
// Should be line annotation with arrow here
// Box annotations
let textAnnotation7 = SCITextAnnotation()
textAnnotation7.x1 = SCIGeneric(3.5)
textAnnotation7.y1 = SCIGeneric(6.1)
textAnnotation7.text = "Draw Boxes"
textAnnotation7.verticalAnchorPoint = .bottom
textAnnotation7.style.textColor = UIColor.white
textAnnotation7.style.textStyle.fontSize = 12
let boxAnnotation1 = SCIBoxAnnotation()
boxAnnotation1.x1 = SCIGeneric(3.5)
boxAnnotation1.y1 = SCIGeneric(4.0)
boxAnnotation1.x2 = SCIGeneric(5.0)
boxAnnotation1.y2 = SCIGeneric(5.0)
boxAnnotation1.style.fillBrush = SCILinearGradientBrushStyle(colorCodeStart: 0x550000FF, finish: 0x55FFFF00, direction: .vertical)
boxAnnotation1.style.borderPen = SCISolidPenStyle(colorCode: 0xFF279B27, withThickness: 1.0)
let boxAnnotation2 = SCIBoxAnnotation()
boxAnnotation2.x1 = SCIGeneric(4.0)
boxAnnotation2.y1 = SCIGeneric(4.5)
boxAnnotation2.x2 = SCIGeneric(5.5)
boxAnnotation2.y2 = SCIGeneric(5.5)
boxAnnotation2.style.fillBrush = SCISolidBrushStyle(colorCode: 0x55FF1919)
boxAnnotation2.style.borderPen = SCISolidPenStyle(colorCode: 0xFFFF1919, withThickness: 1.0)
let boxAnnotation3 = SCIBoxAnnotation()
boxAnnotation3.x1 = SCIGeneric(4.5)
boxAnnotation3.y1 = SCIGeneric(5.0)
boxAnnotation3.x2 = SCIGeneric(6.0)
boxAnnotation3.y2 = SCIGeneric(6.0)
boxAnnotation3.style.fillBrush = SCISolidBrushStyle(colorCode: 0x55279B27)
boxAnnotation3.style.borderPen = SCISolidPenStyle(colorCode: 0xFF279B27, withThickness: 1.0)
// Custom shapes
let textAnnotation8 = SCITextAnnotation()
textAnnotation8.x1 = SCIGeneric(7.0)
textAnnotation8.y1 = SCIGeneric(6.1)
textAnnotation8.text = "Or Custom Shapes"
textAnnotation8.verticalAnchorPoint = .bottom
textAnnotation8.style.textColor = UIColor.white
textAnnotation8.style.textStyle.fontSize = 12
let customAnnotationGreen = SCICustomAnnotation()
customAnnotationGreen.customView = UIImageView(image: UIImage(named: "GreenArrow"))
customAnnotationGreen.x1 = SCIGeneric(8)
customAnnotationGreen.y1 = SCIGeneric(5.5)
let customAnnotationRed = SCICustomAnnotation()
customAnnotationRed.customView = UIImageView(image: UIImage(named: "RedArrow"))
customAnnotationRed.x1 = SCIGeneric(7.5)
customAnnotationRed.y1 = SCIGeneric(5)
// Horizontal Line Annotations
let horizontalLine = SCIHorizontalLineAnnotation()
horizontalLine.x1 = SCIGeneric(5.0)
horizontalLine.y1 = SCIGeneric(3.2)
horizontalLine.horizontalAlignment = .right
horizontalLine.style.linePen = SCISolidPenStyle(color: UIColor.orange, withThickness: 2)
horizontalLine.add(self.createLabelWith(text: "Right Aligned, with text on left", labelPlacement: .topLeft, color: UIColor.orange, backColor: UIColor.clear))
let horizontalLine1 = SCIHorizontalLineAnnotation()
horizontalLine1.y1 = SCIGeneric(7.5)
horizontalLine1.y1 = SCIGeneric(2.8)
horizontalLine1.style.linePen = SCISolidPenStyle(color: UIColor.orange, withThickness: 2)
horizontalLine1.add(self.createLabelWith(text: "", labelPlacement: .axis, color: UIColor.black, backColor: UIColor.orange))
// Vertical Line annotations
let verticalLine = SCIVerticalLineAnnotation()
verticalLine.x1 = SCIGeneric(9.0)
verticalLine.y1 = SCIGeneric(4.0)
verticalLine.verticalAlignment = .bottom;
verticalLine.style.linePen = SCISolidPenStyle(colorCode: 0xFFA52A2A, withThickness: 2)
verticalLine.add(self.createLabelWith(text: "", labelPlacement: .axis, color: UIColor.black, backColor: UIColor.fromARGBColorCode(0xFFA52A2A)))
let verticalLine1 = SCIVerticalLineAnnotation()
verticalLine1.x1 = SCIGeneric(9.5)
verticalLine1.y1 = SCIGeneric(10.0)
verticalLine1.style.linePen = SCISolidPenStyle(colorCode: 0xFFA52A2A, withThickness: 2)
verticalLine.add(self.createLabelWith(text: "", labelPlacement: .axis, color: UIColor.black, backColor: UIColor.fromARGBColorCode(0xFFA52A2A)))
verticalLine.add(self.createLabelWith(text: "Bottom-aligned", labelPlacement: .topRight, color: UIColor.fromARGBColorCode(0xFFA52A2A), backColor: UIColor.clear))
self.surface.annotations = SCIAnnotationCollection(childAnnotations: [watermark, textAnnotation1, textAnnotation2,
textAnnotation3, textAnnotation4, textAnnotation5,
textAnnotation6, lineAnnotation,
textAnnotation7, boxAnnotation1, boxAnnotation2, boxAnnotation3,
textAnnotation8, customAnnotationGreen, customAnnotationRed,
horizontalLine, horizontalLine1, verticalLine, verticalLine1])
self.surface.chartModifiers = SCIChartModifierCollection(childModifiers: [SCIPinchZoomModifier(), SCIZoomExtentsModifier(), SCIZoomPanModifier()])
}
}
fileprivate func createLabelWith(text: String, labelPlacement: SCILabelPlacement, color: UIColor, backColor: UIColor) -> SCILineAnnotationLabel {
let lineAnnotationLabel = SCILineAnnotationLabel()
lineAnnotationLabel.text = text
lineAnnotationLabel.style.backgroundColor = backColor
lineAnnotationLabel.style.labelPlacement = labelPlacement
lineAnnotationLabel.style.textStyle.color = color
return lineAnnotationLabel
}
}