iOS Chart Plot Diagram 图表, Line Chart, Curve Chart, Bar Chart, Gradient Chart
XGChart是一个简洁的iOS 图表库，可以快速集成自定义折线图，曲线图和条形图。
首先，下载XGChart，将XGChart文件夹拖入工程。
然后，导入XGChart.h头文件，配置参数，创建即可。
#import "XGChart.h" // configuration
XGChartConfiguration *configuration = [[XGChartConfiguration alloc] init];
configuration.chartType = XGChartTypeLineChart;
configuration.paddingTop = 20;
configuration.paddingLeft = 20;
configuration.paddingBottom = 20;
configuration.paddingRight = 20;
configuration.xGridCount = 3;
configuration.yGridCount = 4;
configuration.gridColor = [UIColor grayColor];
configuration.xAxisLabelColor = [UIColor whiteColor];
configuration.xAxisLabelFontSize = 12;
configuration.yAxisLabelColor = [UIColor whiteColor];
configuration.yAxisLabelFontSize = 12;
NSMutableArray<XGChartPoint *> *chartPoints = [[NSMutableArray alloc] init];
for (int i = 1; i < 31; i++) {
XGChartPoint *point =
[[XGChartPoint alloc] initWithX:i andY:arc4random_uniform(100)];
[chartPoints addObject:point];
}
configuration.chartPoints = chartPoints;
configuration.strokeColor = [UIColor redColor];
configuration.fillColor = [UIColor redColor];
configuration.lineWidth = 3;
// line chart
XGChart *lineChart = [[XGChart alloc]
initWithFrame:CGRectMake(0, 64, self.view.bounds.size.width,
(self.view.bounds.size.height - 64) / 3)
configuration:configuration];
lineChart.backgroundColor = [UIColor blackColor];
[self.view addSubview:lineChart];