PNChart是一个简单漂亮的动画图表库，Piner和CoinsMan的 iOS 客户端中使用了这个框架。你也可以查看 Swift 版本（开源链接：https://github.com/kevinzhow/PNChart-Swift）。
要求
PNChart 适用于 iOS 7.0 或更高版本，与 ARC 项目兼容。如果需要支持 iOS 6 ，请使用 0.8.1 版本之前的 PNChart 。注意 0.8.2 版本仅支持 iOS 8.0+ ，0.8.3 及更新版本支持 iOS 7.0+ 。
PNChart 依赖于下列框架，这些框架已经嵌入了 Xcode 开发工具：
Foundation.framework
UIKit.framework
CoreGraphics.framework
QuartzCore.framework
你需要 LLVM 3.0 或更高版本来建立 PNChart 。
安装
通过CocoaPods安装（推荐）：
1、在你的 Podfile 文件中添加pod 'PNChart'。
2、运行pod install进行安装。
3、按需导入头文件#import "PNChart.h"。
手动安装：
拷贝PNChart文件夹到你的工程中。
使用
#import"PNChart.h"//For Line ChartPNLineChart*lineChart=[[PNLineChartalloc]initWithFrame:CGRectMake(0,135.0,SCREEN_WIDTH,200.0)];[lineChartsetXLabels:@[@"SEP 1",@"SEP 2",@"SEP 3",@"SEP 4",@"SEP 5"]];// Line Chart No.1NSArray*data01Array=@[@60.1,@160.1,@126.4,@262.2,@186.2];PNLineChartData*data01=[PNLineChartDatanew];data01.color=PNFreshGreen;data01.itemCount=lineChart.xLabels.count;data01.getData=^(NSUIntegerindex){CGFloatyValue=[data01Array[index]floatValue];return[PNLineChartDataItemdataItemWithY:yValue];};// Line Chart No.2NSArray*data02Array=@[@20.1,@180.1,@26.4,@202.2,@126.2];PNLineChartData*data02=[PNLineChartDatanew];data02.color=PNTwitterColor;data02.itemCount=lineChart.xLabels.count;data02.getData=^(NSUIntegerindex){CGFloatyValue=[data02Array[index]floatValue];return[PNLineChartDataItemdataItemWithY:yValue];};lineChart.chartData=@[data01,data02];[lineChartstrokeChart];
#import"PNChart.h"//For BarC hartPNBarChart*barChart=[[PNBarChartalloc]initWithFrame:CGRectMake(0,135.0,SCREEN_WIDTH,200.0)];[barChartsetXLabels:@[@"SEP 1",@"SEP 2",@"SEP 3",@"SEP 4",@"SEP 5"]];[barChartsetYValues:@[@1,@10,@2,@6,@3]];[barChartstrokeChart];``` Objective-C#import"PNChart.h"//For Circle ChartPNCircleChart*circleChart=[[PNCircleChartalloc]initWithFrame:CGRectMake(0,80.0,SCREEN_WIDTH,100.0)total:[NSNumbernumberWithInt:100]current:[NSNumbernumberWithInt:60]clockwise:NOshadow:NO];circleChart.backgroundColor=[UIColorclearColor];[circleChartsetStrokeColor:PNGreen];[circleChart strokeChart];```Objective-C# import"PNChart.h"//For Pie ChartNSArray*items=@[[PNPieChartDataItemdataItemWithValue:10color:PNRed],[PNPieChartDataItemdataItemWithValue:20color:PNBluedescription:@"WWDC"],[PNPieChartDataItemdataItemWithValue:40color:PNGreendescription:@"GOOL I/O"],];PNPieChart*pieChart=[[PNPieChartalloc]initWithFrame:CGRectMake(40.0,155.0,240.0,240.0)items:items];pieChart.descriptionTextColor=[UIColorwhiteColor];pieChart.descriptionTextFont=[UIFontfontWithName:@"Avenir-Medium"size:14.0];[pieChartstrokeChart];
# import"PNChart.h"//For Scatter ChartPNScatterChart*scatterChart=[[PNScatterChartalloc]initWithFrame:CGRectMake(SCREEN_WIDTH/6.0-30,135,280,200)];[scatterChartsetAxisXWithMinimumValue:20andMaxValue:100toTicks:6];[scatterChartsetAxisYWithMinimumValue:30andMaxValue:50toTicks:5];NSArray*data01Array=[selfrandomSetOfObjects];PNScatterChartData*data01=[PNScatterChartDatanew];data01.strokeColor=PNGreen;data01.fillColor=PNFreshGreen;data01.size=2;data01.itemCount=[[data01ArrayobjectAtIndex:0]count];data01.inflexionPointStyle=PNScatterChartPointStyleCircle;__blockNSMutableArray*XAr1=[NSMutableArrayarrayWithArray:[data01ArrayobjectAtIndex:0]];__blockNSMutableArray*YAr1=[NSMutableArrayarrayWithArray:[data01ArrayobjectAtIndex:1]];data01.getData=^(NSUIntegerindex){CGFloatxValue=[[XAr1objectAtIndex:index]floatValue];CGFloatyValue=[[YAr1objectAtIndex:index]floatValue];return[PNScatterChartDataItemdataItemWithX:xValueAndWithY:yValue];};[scatterChartsetup];self.scatterChart.chartData=@[data01];/***
this is for drawing line to compare
CGPoint start = CGPointMake(20, 35);
CGPoint end = CGPointMake(80, 45);
[scatterChart drawLineFromPoint:start ToPoint:end WithLineWith:2 AndWithColor:PNBlack];
***/scatterChart.delegate=self;
图例
PNChart 允许在折线图和饼状图中添加图例，图例可以竖向堆叠布置或者横向并列布置。
#import"PNChart.h"//For Line Chart//Add Line Titles for the Legenddata01.dataTitle=@"Alpha";data02.dataTitle=@"Beta Beta Beta Beta";//Build the legendself.lineChart.legendStyle=PNLegendItemStyleSerial;self.lineChart.legendFontSize=12.0;UIView*legend=[self.lineChartgetLegendWithMaxWidth:320];//Move legend to the desired position and add to view[legendsetFrame:CGRectMake(100,400,legend.frame.size.width,legend.frame.size.height)];[self.viewaddSubview:legend];//For Pie Chart//Build the legendself.pieChart.legendStyle=PNLegendItemStyleStacked;self.pieChart.legendFontSize=12.0;UIView*legend=[self.pieChartgetLegendWithMaxWidth:200];//Move legend to the desired position and add to view[legendsetFrame:CGRectMake(130,350,legend.frame.size.width,legend.frame.size.height)];[self.viewaddSubview:legend];更新数据实时更新数据也非常简单。Objective-Cif([self.titleisEqualToString:@"Line Chart"]){// Line Chart #1NSArray*data01Array=@[@(arc4random()%300),@(arc4random()%300),@(arc4random()%300),@(arc4random()%300),@(arc4random()%300),@(arc4random()%300),@(arc4random()%300)];PNLineChartData*data01=[PNLineChartDatanew];data01.color=PNFreshGreen;data01.itemCount=data01Array.count;data01.inflexionPointStyle=PNLineChartPointStyleTriangle;data01.getData=^(NSUIntegerindex){CGFloatyValue=[data01Array[index]floatValue];return[PNLineChartDataItemdataItemWithY:yValue];};// Line Chart #2NSArray*data02Array=@[@(arc4random()%300),@(arc4random()%300),@(arc4random()%300),@(arc4random()%300),@(arc4random()%300),@(arc4random()%300),@(arc4random()%300)];PNLineChartData*data02=[PNLineChartDatanew];data02.color=PNTwitterColor;data02.itemCount=data02Array.count;data02.inflexionPointStyle=PNLineChartPointStyleSquare;data02.getData=^(NSUIntegerindex){CGFloatyValue=[data02Array[index]floatValue];return[PNLineChartDataItemdataItemWithY:yValue];};[self.lineChartsetXLabels:@[@"DEC 1",@"DEC 2",@"DEC 3",@"DEC 4",@"DEC 5",@"DEC 6",@"DEC 7"]];[self.lineChartupdateChartData:@[data01,data02]];}elseif([self.titleisEqualToString:@"Bar Chart"]){[self.barChartsetXLabels:@[@"Jan 1",@"Jan 2",@"Jan 3",@"Jan 4",@"Jan 5",@"Jan 6",@"Jan 7"]];[self.barChartupdateChartData:@[@(arc4random()%30),@(arc4random()%30),@(arc4random()%30),@(arc4random()%30),@(arc4random()%30),@(arc4random()%30),@(arc4random()%30)]];}elseif([self.titleisEqualToString:@"Circle Chart"]){[self.circleChartupdateChartByCurrent:@(arc4random()%100)];}代理回调Objective-C#import"PNChart.h"//For LineChartlineChart.delegate=self;动画默认绘制图表时使用动画，可以通过设置displayAnimation =NO来禁止动画。Objective-C#import"PNChart.h"//For LineChartlineChart.displayAnimation=NO;```Objective-C//For DelegateMethod-(void)userClickedOnLineKeyPoint:(CGPoint)pointlineIndex:(NSInteger)lineIndexpointIndex:(NSInteger)pointIndex{NSLog(@"Click Key on line %f, %f line index is %d and point index is %d",point.x,point.y,(int)lineIndex,(int)pointIndex);}-(void)userClickedOnLinePoint:(CGPoint)pointlineIndex:(NSInteger)lineIndex{NSLog(@"Click on line %f, %f, line index is %d",point.x,point.y,(int)lineIndex);}
开源协议
PNChart 在MIT开源协议下可以使用，也就是说，只要在项目副本中包含了版权声明和许可声明，用户就可以使用 PNChart 做任何想做的事情，而 PNChart 也无需承担任何责任。可以通过查看 LICENSE 文件来获取更多相关信息。
开源地址：https://github.com/kevinzhow/PNChart
转载自：https://www.jianshu.com/p/9c162d6f8f14
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