UINavigationController UITabbarController 一起使用实例一

在上两篇文章中，我们分别介绍了  UINavigationController 与 UITabbarController 的简单使用，当然，除了里面介绍的实现方法外，当然还存在其他的方法去实现。
那么，在具备了上两篇文章的基础之后，我想，这里有必要实现一个稍微复杂一点的功能了，这个功能将UINavigationController and UITabbarController  结合起来使用

本文转自 http://www.999dh.net/article/iphone_ios_art/48.html  转载请注明，谢谢！

功能实现后的运行效果如下图所示




实现如下
1.建立一个 empty application

2.建立3个派生自 UIViewController的类 分别为MyViewController NavRootController 以及 NavSecondController。

在 XYZAppDelegate.m 文件里面，实现如下：

#import "XYZAppDelegate.h"
#import "MyViewController.h"
#import "NavRootController.h"

@implementation XYZAppDelegate

@synthesize window = _window;

- (void)dealloc
{
    [_window release];
    [super dealloc];
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
    // Override point for customization after application launch.
    self.window.backgroundColor = [UIColor whiteColor];
    
    MyViewController * myView = [[MyViewController alloc] initWithNibName:@"MyViewController" bundle:nil];
    [myView.view setBackgroundColor:[UIColor blueColor]];
    
    [myView setTitle:@"My View"];
    
    NavRootController * navController = [[NavRootController alloc] initWithNibName:@"NavRootController" bundle:nil];
    [navController.view setBackgroundColor:[UIColor yellowColor]];
    [navController setTitle:@"Nav Root-View"];
    
    UINavigationController * nav   = [[UINavigationController alloc] init];
    [nav pushViewController:navController animated:NO];
    
    NSArray * array = [NSArray arrayWithObjects:myView,nav,nil];//这里是关键  第二个object是nav

    UITabBarController * tabbarController = [[UITabBarController alloc]init];
    [tabbarController setViewControllers:array];
    
    self.window.rootViewController = tabbarController;
    
    [self.window makeKeyAndVisible];
    return YES;
}

3.在NavRootViewController.m文件里面实现如下 

#import "NavRootController.h"
#import "NavSecondController.h"

@interface NavRootController ()

@end

@implementation NavRootController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    NSLog(@"initWithNibName");
    
    UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    [button addTarget:self action:@selector(goNext) forControlEvents:UIControlEventTouchDown];
    [button setTitle:@"Second View" forState:UIControlStateNormal];
    
    button.frame = CGRectMake(0,0,100.0,40.0);
    [self.view addSubview:button];
    
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];

    if (self) {
        // Custom initialization
    }
    return self;
}


-(void)goNext
{
    NavSecondController * secView = [[NavSecondController alloc] init];
    [self.navigationController pushViewController:secView animated:YES];
}

-(void)leftPressed:(id)sender
{
    UIAlertView * alert = [[UIAlertView alloc] initWithTitle:@"AA" message:@"bbbb" delegate:nil cancelButtonTitle:@"ok" otherButtonTitles:nil, nil];
    
    [alert show];
    [alert release];
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    UIBarButtonItem * leftButton = [[UIBarButtonItem alloc] initWithTitle:@"aaa" style:UIBarButtonItemStyleDone target:self action:@selector(leftPressed:)];
    
    //self.navigationController.
    self.navigationItem.leftBarButtonItem = leftButton;
    
    [leftButton release];
    
    NSLog(@"viewDidLoad");
}

这样就实现了将 UINavigationController与UITabbarController一起使用的效果，这样的效果在很多app里面有使用到。 当然，还能实现更加复杂的功能，后续会附上。