竖状图(NTChartViewDemo)

效果图：

工程图：

此代码需要加入第三方库NTChartView.

代码：

#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];

}