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- //
- // NegativeStackedBarChartViewController.m
- // ChartsDemo
- //
- // Copyright 2015 Daniel Cohen Gindi & Philipp Jahoda
- // A port of MPAndroidChart for iOS
- // Licensed under Apache License 2.0
- //
- // https://github.com/danielgindi/Charts
- //
- #import "NegativeStackedBarChartViewController.h"
- #import "ChartsDemo_iOS-Swift.h"
- @interface NegativeStackedBarChartViewController () <ChartViewDelegate, ChartAxisValueFormatter>
- @property (nonatomic, strong) IBOutlet HorizontalBarChartView *chartView;
- @end
- @implementation NegativeStackedBarChartViewController
- - (void)viewDidLoad
- {
- [super viewDidLoad];
-
- self.title = @"Stacked Bar Chart Negative";
-
- self.options = @[
- @{@"key": @"toggleValues", @"label": @"Toggle Values"},
- @{@"key": @"toggleIcons", @"label": @"Toggle Icons"},
- @{@"key": @"toggleHighlight", @"label": @"Toggle Highlight"},
- @{@"key": @"animateX", @"label": @"Animate X"},
- @{@"key": @"animateY", @"label": @"Animate Y"},
- @{@"key": @"animateXY", @"label": @"Animate XY"},
- @{@"key": @"saveToGallery", @"label": @"Save to Camera Roll"},
- @{@"key": @"togglePinchZoom", @"label": @"Toggle PinchZoom"},
- @{@"key": @"toggleAutoScaleMinMax", @"label": @"Toggle auto scale min/max"},
- @{@"key": @"toggleData", @"label": @"Toggle Data"},
- @{@"key": @"toggleBarBorders", @"label": @"Show Bar Borders"},
- ];
-
- NSNumberFormatter *customFormatter = [[NSNumberFormatter alloc] init];
- customFormatter.negativePrefix = @"";
- customFormatter.positiveSuffix = @"m";
- customFormatter.negativeSuffix = @"m";
- customFormatter.minimumSignificantDigits = 1;
- customFormatter.minimumFractionDigits = 1;
-
- _chartView.delegate = self;
-
- _chartView.chartDescription.enabled = NO;
-
- _chartView.drawBarShadowEnabled = NO;
- _chartView.drawValueAboveBarEnabled = YES;
- _chartView.highlightFullBarEnabled = NO;
-
- // scaling can now only be done on x- and y-axis separately
- _chartView.pinchZoomEnabled = NO;
-
- _chartView.drawBarShadowEnabled = NO;
-
- _chartView.leftAxis.enabled = NO;
- _chartView.rightAxis.axisMaximum = 25.0;
- _chartView.rightAxis.axisMinimum = -25.0;
- _chartView.rightAxis.drawGridLinesEnabled = NO;
- _chartView.rightAxis.drawZeroLineEnabled = YES;
- _chartView.rightAxis.labelCount = 7;
- _chartView.rightAxis.valueFormatter = [[ChartDefaultAxisValueFormatter alloc] initWithFormatter:customFormatter];
- _chartView.rightAxis.labelFont = [UIFont systemFontOfSize:9.f];
-
- ChartXAxis *xAxis = _chartView.xAxis;
- xAxis.labelPosition = XAxisLabelPositionBothSided;
- xAxis.drawGridLinesEnabled = NO;
- xAxis.drawAxisLineEnabled = NO;
- xAxis.axisMinimum = 0.0;
- xAxis.axisMaximum = 110.0;
- xAxis.centerAxisLabelsEnabled = YES;
- xAxis.labelCount = 12;
- xAxis.granularity = 10.0;
- xAxis.valueFormatter = self;
-
- _chartView.rightAxis.labelFont = [UIFont systemFontOfSize:9.f];
-
- ChartLegend *l = _chartView.legend;
- l.horizontalAlignment = ChartLegendHorizontalAlignmentRight;
- l.verticalAlignment = ChartLegendVerticalAlignmentBottom;
- l.orientation = ChartLegendOrientationHorizontal;
- l.drawInside = NO;
- l.formSize = 8.f;
- l.formToTextSpace = 4.f;
- l.xEntrySpace = 6.f;
-
- [self updateChartData];
- }
- - (void)updateChartData
- {
- if (self.shouldHideData)
- {
- _chartView.data = nil;
- return;
- }
-
- [self setChartData];
- }
- - (void)setChartData
- {
- NSMutableArray *yValues = [NSMutableArray array];
- [yValues addObject:[[BarChartDataEntry alloc] initWithX:5 yValues:@[ @-10, @10 ]]];
- [yValues addObject:[[BarChartDataEntry alloc] initWithX:15 yValues:@[ @-12, @13 ]]];
- [yValues addObject:[[BarChartDataEntry alloc] initWithX:25 yValues:@[ @-15, @15 ]]];
- [yValues addObject:[[BarChartDataEntry alloc] initWithX:35 yValues:@[ @-17, @17 ]]];
- [yValues addObject:[[BarChartDataEntry alloc] initWithX:45 yValues:@[ @-19, @20 ] icon: [UIImage imageNamed:@"icon"]]];
- [yValues addObject:[[BarChartDataEntry alloc] initWithX:55 yValues:@[ @-19, @19 ]]];
- [yValues addObject:[[BarChartDataEntry alloc] initWithX:65 yValues:@[ @-16, @16 ]]];
- [yValues addObject:[[BarChartDataEntry alloc] initWithX:75 yValues:@[ @-13, @14 ]]];
- [yValues addObject:[[BarChartDataEntry alloc] initWithX:85 yValues:@[ @-10, @11 ]]];
- [yValues addObject:[[BarChartDataEntry alloc] initWithX:95 yValues:@[ @-5, @6 ]]];
- [yValues addObject:[[BarChartDataEntry alloc] initWithX:105 yValues:@[ @-1, @2 ]]];
-
- BarChartDataSet *set = nil;
- if (_chartView.data.dataSetCount > 0)
- {
- set = (BarChartDataSet *)_chartView.data.dataSets[0];
- [set replaceEntries: yValues];
- [_chartView.data notifyDataChanged];
- [_chartView notifyDataSetChanged];
- }
- else
- {
- NSNumberFormatter *customFormatter = [[NSNumberFormatter alloc] init];
- customFormatter.negativePrefix = @"";
- customFormatter.positiveSuffix = @"m";
- customFormatter.negativeSuffix = @"m";
- customFormatter.minimumSignificantDigits = 1;
- customFormatter.minimumFractionDigits = 1;
-
- set = [[BarChartDataSet alloc] initWithEntries:yValues label:@"Age Distribution"];
-
- set.drawIconsEnabled = NO;
-
- set.valueFormatter = [[ChartDefaultValueFormatter alloc] initWithFormatter:customFormatter];
- set.valueFont = [UIFont systemFontOfSize:7.f];
- set.axisDependency = AxisDependencyRight;
- set.colors = @[
- [UIColor colorWithRed:67/255.f green:67/255.f blue:72/255.f alpha:1.f],
- [UIColor colorWithRed:124/255.f green:181/255.f blue:236/255.f alpha:1.f]
- ];
- set.stackLabels = @[
- @"Men", @"Women"
- ];
-
- BarChartData *data = [[BarChartData alloc] initWithDataSet:set];
-
- data.barWidth = 8.5;
-
- _chartView.data = data;
- [_chartView setNeedsDisplay];
- }
- }
- - (void)didReceiveMemoryWarning
- {
- [super didReceiveMemoryWarning];
- // Dispose of any resources that can be recreated.
- }
- - (void)optionTapped:(NSString *)key
- {
- [super handleOption:key forChartView:_chartView];
- }
- #pragma mark - ChartViewDelegate
- - (void)chartValueSelected:(ChartViewBase * __nonnull)chartView entry:(ChartDataEntry * __nonnull)entry highlight:(ChartHighlight * __nonnull)highlight
- {
- NSLog(@"chartValueSelected, stack-index %ld", (long)highlight.stackIndex);
- }
- - (void)chartValueNothingSelected:(ChartViewBase * __nonnull)chartView
- {
- NSLog(@"chartValueNothingSelected");
- }
- #pragma mark - AxisValueFormatter
- - (NSString *)stringForValue:(double)value
- axis:(ChartAxisBase *)axis
- {
- return [NSString stringWithFormat:@"%03.0f-%03.0f", value, value + 10.0];
- }
- @end
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