https://github.com/kevinzhow/PNChart

官方demo 写的很清楚了，更多自定义需要看api
注1：建议不使用pod，直接拖入工程，还能更好的自定义。
注2：需要添加额外一个变化数字的label库（pod会自动添加） https://github.com/dataxpress/UICountingLabel
注3：可能回报CGfloat 的问题，请添加#import <UIKit/UIkit.h>

折线图

    // 折线图设置
    PNLineChart * lineChart = [[PNLineChart alloc] initWithFrame:CGRectMake(0, 135.0, SCREEN_WIDTH, 200.0)];
    [lineChart setXLabels:@[@"SEP 1",@"SEP 2",@"SEP 3",@"SEP 4",@"SEP 5"]];
    
    
    // 折现数据配置1
    NSArray * data01Array = @[@60.1, @160.1, @126.4, @262.2, @186.2];
    PNLineChartData *data01 = [PNLineChartData new];
    data01.color = PNFreshGreen;
    data01.itemCount = lineChart.xLabels.count;
    data01.getData = ^(NSUInteger index) {
        CGFloat yValue = [data01Array[index] floatValue];
        return [PNLineChartDataItem dataItemWithY:yValue];
    };
    
    // 折现数据配置2
    NSArray * data02Array = @[@20.1, @180.1, @26.4, @202.2, @126.2];
    PNLineChartData *data02 = [PNLineChartData new];
    data02.color = PNTwitterColor;
    data02.itemCount = lineChart.xLabels.count;
    data02.getData = ^(NSUInteger index) {
        CGFloat yValue = [data02Array[index] floatValue];
        return [PNLineChartDataItem dataItemWithY:yValue];
    };
    
    
    // 整合数据 // 绘制折现
    lineChart.chartData = @[data01, data02];
    [lineChart strokeChart];
    [self.view addSubview:lineChart];
    

圆环图

    PNCircleChart * circleChart = [[PNCircleChart alloc] initWithFrame:CGRectMake(0, 80.0, SCREEN_WIDTH, 100.0) total:@(100) current:@(23) clockwise:YES shadow:YES shadowColor:[UIColor grayColor] displayCountingLabel:YES overrideLineWidth:@(6)];
    circleChart.backgroundColor = [UIColor clearColor];
    [circleChart setStrokeColor:PNGreen];
    [circleChart strokeChart];
    
    [self.view addSubview:circleChart];

圆饼图

    // 数据源
    NSArray *items = @[[PNPieChartDataItem dataItemWithValue:10 color:PNRed],
                       [PNPieChartDataItem dataItemWithValue:20 color:PNBlue description:@"WWDC"],
                       [PNPieChartDataItem dataItemWithValue:40 color:PNGreen description:@"GOOL I/O"],
                       ];
    
    
    // 圆饼图
    PNPieChart *pieChart = [[PNPieChart alloc] initWithFrame:CGRectMake(40.0, 155.0, 240.0, 240.0) items:items];
    pieChart.descriptionTextColor = [UIColor whiteColor];
    pieChart.descriptionTextFont  = [UIFont fontWithName:@"Avenir-Medium" size:14.0];
    [pieChart strokeChart];
    
    [self.view addSubview:pieChart];
    

柱状图

    PNBarChart * barChart = [[PNBarChart alloc] initWithFrame:CGRectMake(0, 135.0, SCREEN_WIDTH, 200.0)];
    [barChart setXLabels:@[@"SEP 1",@"SEP 2",@"SEP 3",@"SEP 4",@"SEP 5"]];
    [barChart setYValues:@[@1, @10, @2, @6, @3]];
    [barChart strokeChart];
    

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