iOS：UISplitViewController的创建

UISplitViewController是iPad特有的系统方法，主要效果就是呈现iPad的经典切割界面

代码创建实例：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    MyFirstViewController* firstVC = [[MyFirstViewController alloc] initWithNibName:@"FirstNib" bundle:nil];
    MySecondViewController* secondVC = [[MySecondViewController alloc] initWithNibName:@"SecondNib" bundle:nil];
    UISplitViewController* splitVC = [[UISplitViewController alloc] init];
    splitVC.viewControllers = [NSArray arrayWithObjects:firstVC, secondVC, nil];
    [window addSubview:splitVC.view];
    [window makeKeyAndVisible];
    return YES;
}