#import "RootViewController.h"//加入头文件#import "NTChartView.h"- (void)viewDidLoad{    [super viewDidLoad];    // Do any additional setup after loading the view.            self.title=@"竖状图";            NTChartView *v = [[NTChartView alloc] initWithFrame:CGRectMake(10, 10, 300, 300)];        NSArray *g = [NSArray arrayWithObject:[NSMutableArray arrayWithObjects:                                           [NSNumber numberWithFloat:18],                                           [NSNumber numberWithFloat:30],                                           [NSNumber numberWithFloat:16.5],                                           [NSNumber numberWithFloat:55],                                           [NSNumber numberWithFloat:40],nil]];    v.groupData = g;        [self.view addSubview:v];    }