如何打包ipa文件

//
//  RootViewController.m
//  YouXianMing
//
//  Copyright (c) 2014年 Y.X. All rights reserved.
//

#import "RootViewController.h"

@interface RootViewController ()

@end

@implementation RootViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    UILabel *label      = [[UILabel alloc] initWithFrame:self.view.bounds];
    label.text          = @"YouXianMing";
    label.textAlignment = NSTextAlignmentCenter;
    label.font          = [UIFont fontWithName:@"HelveticaNeue-UltraLight"
                                          size:50.f];
    [self.view addSubview:label];
}

@end