iOS使用Charts框架绘制柱形图

self.barChartView = [[BarChartView alloc] init];self.barChartView.delegate = self;//设置代理[self.view addSubview:self.barChartView];[self.barChartView mas_makeConstraints:^(MASConstraintMaker *make) { make.size.mas_equalTo(CGSizeMake(self.view.bounds.size.width-20, 300)); make.center.mas_equalTo(self.view);}];

self.barChartView.backgroundColor = [UIColor colorWithRed:230/255.0f green:253/255.0f blue:253/255.0f alpha:1];self.barChartView.noDataText = @"暂无数据";//没有数据时的文字提示self.barChartView.drawValueAboveBarEnabled = YES;//数值显示在柱形的上面还是下面self.barChartView.drawHighlightArrowEnabled = NO;//点击柱形图是否显示箭头self.barChartView.drawBarShadowEnabled = NO;//是否绘制柱形的阴影背景

self.barChartView.scaleYEnabled = NO;//取消Y轴缩放self.barChartView.doubleTapToZoomEnabled = NO;//取消双击缩放self.barChartView.dragEnabled = YES;//启用拖拽图表self.barChartView.dragDecelerationEnabled = YES;//拖拽后是否有惯性效果self.barChartView.dragDecelerationFrictionCoef = 0.9;//拖拽后惯性效果的摩擦系数(0~1)，数值越小，惯性越不明显

ChartXAxis *xAxis = self.barChartView.xAxis;xAxis.axisLineWidth = 1;//设置X轴线宽xAxis.labelPosition = XAxisLabelPositionBottom;//X轴的显示位置，默认是显示在上面的xAxis.drawGridLinesEnabled = NO;//不绘制网格线xAxis.spaceBetweenLabels = 4;//设置label间隔，若设置为1，则如果能全部显示，则每个柱形下面都会显示labelxAxis.labelTextColor = [UIColor brownColor];//label文字颜色

leftAxis.forceLabelsEnabled = NO;//不强制绘制制定数量的labelleftAxis.showOnlyMinMaxEnabled = NO;//是否只显示最大值和最小值leftAxis.axisMinValue = 0;//设置Y轴的最小值leftAxis.startAtZeroEnabled = YES;//从0开始绘制leftAxis.axisMaxValue = 105;//设置Y轴的最大值leftAxis.inverted = NO;//是否将Y轴进行上下翻转leftAxis.axisLineWidth = 0.5;//Y轴线宽leftAxis.axisLineColor = [UIColor blackColor];//Y轴颜色

ChartYAxis *leftAxis = self.barChartView.leftAxis;//获取左边Y轴leftAxis.labelCount = 5;leftAxis.forceLabelsEnabled = NO;

leftAxis.labelPosition = YAxisLabelPositionOutsideChart;//label位置 leftAxis.labelTextColor = [UIColor brownColor];//文字颜色leftAxis.labelFont = [UIFont systemFontOfSize:10.0f];//文字字体

leftAxis.valueFormatter = [[NSNumberFormatter alloc] init];//自定义格式leftAxis.valueFormatter.positiveSuffix = @" $";//数字后缀单位

leftAxis.gridLineDashLengths = @[@3.0f, @3.0f];//设置虚线样式的网格线leftAxis.gridColor = [UIColor colorWithRed:200/255.0f green:200/255.0f blue:200/255.0f alpha:1];//网格线颜色leftAxis.gridAntialiasEnabled = YES;//开启抗锯齿

ChartLimitLine *limitLine = [[ChartLimitLine alloc] initWithLimit:80 label:@"限制线"];limitLine.lineWidth = 2;limitLine.lineColor = [UIColor greenColor];limitLine.lineDashLengths = @[@5.0f, @5.0f];//虚线样式limitLine.labelPosition = ChartLimitLabelPositionRightTop;//位置[leftAxis addLimitLine:limitLine];//添加到Y轴上leftAxis.drawLimitLinesBehindDataEnabled = YES;//设置限制线绘制在柱形图的后面

//为柱形图设置数据- (BarChartData *)setData{ int xVals_count = 12;//X轴上要显示多少条数据 double maxYVal = 100;//Y轴的最大值 //X轴上面需要显示的数据 NSMutableArray *xVals = [[NSMutableArray alloc] init]; for (int i = 0; i < xVals_count; i++) { [xVals addObject:[NSString stringWithFormat:@"%d月", i+1]]; } //对应Y轴上面需要显示的数据 NSMutableArray *yVals = [[NSMutableArray alloc] init]; for (int i = 0; i < xVals_count; i++) { double mult = maxYVal + 1; double val = (double)(arc4random_uniform(mult)); BarChartDataEntry *entry = [[BarChartDataEntry alloc] initWithValue:val xIndex:i]; [yVals addObject:entry]; } //创建BarChartDataSet对象，其中包含有Y轴数据信息，以及可以设置柱形样式 BarChartDataSet *set1 = [[BarChartDataSet alloc] initWithYVals:yVals label:nil]; set1.barSpace = 0.2;//柱形之间的间隙占整个柱形(柱形+间隙)的比例 set1.drawValuesEnabled = YES;//是否在柱形图上面显示数值 set1.highlightEnabled = NO;//点击选中柱形图是否有高亮效果，（双击空白处取消选中） [set1 setColors:ChartColorTemplates.material];//设置柱形图颜色 //将BarChartDataSet对象放入数组中 NSMutableArray *dataSets = [[NSMutableArray alloc] init]; [dataSets addObject:set1]; //创建BarChartData对象, 此对象就是barChartView需要最终数据对象 BarChartData *data = [[BarChartData alloc] initWithXVals:xVals dataSets:dataSets]; [data setValueFont:[UIFont fontWithName:@"HelveticaNeue-Light" size:10.f]];//文字字体 [data setValueTextColor:[UIColor orangeColor]];//文字颜色 NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init]; //自定义数据显示格式 [formatter setNumberStyle:NSNumberFormatterDecimalStyle]; [formatter setPositiveFormat:@"#0.0"]; [data setValueFormatter:formatter]; return data;}

self.data = [self setData]; //为柱形图提供数据 self.barChartView.data = self.data;//设置动画效果，可以设置X轴和Y轴的动画效果[self.barChartView animateWithYAxisDuration:1.0f];

- (void)chartValueSelected:(ChartViewBase * _Nonnull)chartView entry:(ChartDataEntry * _Nonnull)entry dataSetIndex:(NSInteger)dataSetIndex highlight:(ChartHighlight * _Nonnull)highlight{ NSLog(@"---chartValueSelected---value: %g", entry.value);}

- (void)chartValueNothingSelected:(ChartViewBase * _Nonnull)chartView{ NSLog(@"---chartValueNothingSelected---");}

- (void)chartScaled:(ChartViewBase * _Nonnull)chartView scaleX:(CGFloat)scaleX scaleY:(CGFloat)scaleY{ NSLog(@"---chartScaled---scaleX:%g, scaleY:%g", scaleX, scaleY);}

- (void)chartTranslated:(ChartViewBase * _Nonnull)chartView dX:(CGFloat)dX dY:(CGFloat)dY{ NSLog(@"---chartTranslated---dX:%g, dY:%g", dX, dY);}