#import <UIKit/UIKit.h>@interface RootViewController : UIViewController@end

#import "RootViewController.h"//加入頭文件#import "My97DatePicker.h"@interface RootViewController ()@end@implementation RootViewController- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil{ self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) {  // Custom initialization } return self;}- (void)viewDidLoad{ [super viewDidLoad]; // Do any additional setup after loading the view.   CGRect frame = CGRectMake(131, 155, 122, 29); My97DatePicker* piker = [[My97DatePicker alloc] initWithFrame:frame]; [self.view addSubview:piker];  }