#import "ViewController.h"@interface ViewController ()//指定要画得view@property(nonatomic,assign)CPTGraphHostingView *hostview;//指定画布@property(nonatomic,retain)CPTXYGraph *graph;@property(nonatomic,retain)NSMutableArray *data;@end@implementation ViewController- (void)viewDidLoad{    [super viewDidLoad];    self.data=[NSMutableArray array];    for (int i=0; i<50; i++) {                id x=[NSNumber numberWithInt:i];        id y=[NSNumber numberWithInt:(i+0.11)];        [self.data addObject:@{
    @"x":x,@"y":y}];    }    self.hostview=[[CPTGraphHostingView alloc] initWithFrame:CGRectMake(0, 0, 320, 200)];        //创建x,Y轴画布    self.graph=[[[CPTXYGraph alloc] initWithFrame:CGRectZero] autorelease];    //设置主题    CPTTheme *them=[CPTTheme themeNamed:kCPTStocksTheme];    //设置x.y周画布的主题    [self.graph applyTheme:them];        self.graph.paddingBottom=0.0f;    self.graph.paddingLeft=0.0f;    self.graph.paddingRight=0.0f;    self.graph.paddingTop=0.0f;    self.hostview.hostedGraph=self.graph;    [self.view addSubview:self.hostview];            CPTMutableLineStyle *linestyle=[CPTMutableLineStyle lineStyle];    linestyle.lineWidth=3.0f;    linestyle.lineColor=[CPTColor redColor];    linestyle.miterLimit=1.0f;        CPTScatterPlot *scatter=[[CPTScatterPlot alloc] init];    scatter.dataLineStyle=linestyle;    scatter.dataSource=self;    scatter.identifier=@"red";    [self.graph addPlot:scatter];    }-(NSUInteger)numberOfRecordsForPlot:(CPTPlot *)plot;{    return  self.data.count;}-(NSNumber *)numberForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index{    NSString *key= (fieldEnum==CPTScatterPlotFieldX?@"x":@"y");    NSDictionary *dic=self.data[index];    NSLog(@"%@--->%@",key,dic[key]);    return dic[key];        }- (void)didReceiveMemoryWarning{    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}- (void)dealloc{    [_graph release];    [super dealloc];}@end