IOS 自定义导航栏和标签栏

大多数ios应用都是以标签栏加导航栏的形式呈现，一般根控制器都是UIToolbar，然后再以UINavigationController为子控制器，然后再加入UIViewController。为什么要这样？因为不同的标签栏的项一般对应不 同的功能，那么导航栏的标题一般就不同。如果所有导航栏都一样，那你就随便设置根控制器。
主要代码： AppDelegate.h中
@class cscControllerOne;
@class cscControllerTwo;
@class cscControllerThree;
@class cscControllerFour;
@interface cscAppDelegate : UIResponder {
       cscControllerOne *oneRootView;
       cscControllerTwo *twoRootView;
       cscControllerThree *threeRootView;
       cscControllerFour   *fourRootView;
       UITabBarController *tabBarController;
       UINavigationController *unc1;
       UINavigationController *unc2;
       UINavigationController *unc3;
       UINavigationController *unc4;
}

AppDelegate.m中
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOp tions:(NSDictionary *)launchOptions
{
       self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
       // Override point for customization after application launch.
       oneRootView=[[cscControllerOne alloc]init];
       oneRootView.title=@"视图1";
       twoRootView=[[cscControllerTwo alloc]init];
       twoRootView.title=@"视图2";
       threeRootView=[[cscControllerThree alloc]init];
       threeRootView.title=@"视图3";
       fourRootView=[[cscControllerFour alloc]init];
       fourRootView.title=@"视图4";
       unc1=[[UINavigationController alloc]initWithRootViewControll er:oneRootView];
       unc2=[[UINavigationController alloc]initWithRootViewControll er:twoRootView];
       unc3=[[UINavigationController alloc]initWithRootViewControll er:threeRootView];
       unc4=[[UINavigationController alloc]initWithRootViewControll er:fourRootView];
       unc1.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"淘宝搜索" image:[UIImage imageNamed:@"Area.png"]   tag:2];
       unc2.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"我的淘宝" image:[UIImage imageNamed:@"Summary.png"]   tag:3];
       unc3.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"淘宝功能" image:[UIImage imageNamed:@"Apple.png"]   tag:4];
       unc4.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"软件设置" image:[UIImage imageNamed:@"BoxVolume.png"]   tag:5];
       NSArray *viewsArray=[[NSArray alloc]initWithObjects:unc1,unc2,unc3,unc4, nil];
       tabBarController=[[UITabBarController alloc]init];
       tabBarController.viewControllers=viewsArray;
     
       self.window.rootViewController = tabBarController;
       [self.window makeKeyAndVisible];
       return YES;
}
可能这段代码并不难，刚入门的新手都能轻松做出来，但是一个新手与一个有多年开发经验的高手，区别之一在于代码的积累，所以大量的案例，是一个高手的必备，是二次开发的利器。
下载地址http://www.kuaipan.cn/file/id_30491149655343756.htm
有时候可能会遇到在push之后隐藏标签栏，其实很简单，只要一条语句：
self.hidesBottomBarWhenPushed    =NO;
下载一个push隐藏的例子
效果图：





效果图二：图中第二到第五张图是iphone5真机中的效果，自定义标签栏，万能的方法。
有自定义的标签栏，自定义的导航栏，隐藏标签栏，隐藏导航栏，并且不阻塞viewWillAppear,自定义导航栏的返回按钮
        具体办法是隐藏系统自带的标签栏，绘制自己的标签栏，然后为每个标签设置点击事件。

       self.customTabBar = [[[CustomTabBar alloc] init] autorelease];
       self.customTabBar.tabBarController = self.viewController;
       [self.customTabBar custom];
       [self.viewController.tabBarController.tabBar setHidden:YES];
自定义一个按钮，然后加到导航栏中，可以是替换系统的返回按钮
UIButton *btn=[UIButton buttonWithType:UIButtonTypeCustom];
       btn.frame=CGRectMake(0, 0, 60, 30);
       [btn setBackgroundImage:[UIImage imageNamed:@"按钮p.png"] forState:UIControlStateNormal];
//       [btn setTitle:@"aaaaaa" forState:UIControlStateNormal];
       [btn setBackgroundImage:[UIImage imageNamed:@"按钮n.png"] forState:UIControlStateHighlighte d];   // highlighted
       [btn addTarget:self action:@selector(pushAction) forControlEvents:UIControlEventTouchUpIns ide];
       UIBarButtonItem *BarBtn = [[UIBarButtonItem alloc] initWithCustomView:btn ];
       self.navigationItem.leftBarButtonItem=BarBtn;
       [BarBtn release];
       [btn release];
设置系统样式UIBarButtonItem按钮
UIBarButtonItem *addButton = [[[UIBarButtonItem alloc] initWithTitle:@"button" style:UIBarButtonItemStyleBord ered target:self action:@selector(Action)] autorelease];
       self.navigationItem.rightBarButtonItem = addButton;
设置一个包含自定义图标的UIBarButtonItem按钮
UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"email.png"] style:UIBarButtonItemStyleBord ered target:self action:@selector(action:)];
self.navigationItem.rightBarButtonItem = addButton;
设置一个分段控件替换导航栏上的按钮
UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] initWithItems: [NSArray arrayWithObjects: [UIImage imageNamed:@"up.png"], [UIImage imageNamed:@"down.png"], nil]];
       [segmentedControl addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChang ed];
       segmentedControl.frame = CGRectMake(0, 0, 90, kCustomButtonHeight);
       segmentedControl.segmentedControlStyle = UISegmentedControlStyleB ar;
       segmentedControl.momentary = YES;
       UIBarButtonItem *segmentBarItem = [[UIBarButtonItem alloc] initWithCustomView:segmentedControl];
       [segmentedControl release];
       self.navigationItem.rightBarButtonItem = segmentBarItem;
       [segmentBarItem release];
中间第二个标签有一个远较，是因为那部分图片是透明的，根据需要可以设置标签栏的样式。
点击下载http://www.kuaipan.cn/file/id_30491149655345680.htm
设置导航栏为半透明
[UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleBlackTra nslucent;
self.navigationController.navigationBar.barStyle = UIBarStyleBlackTransluce nt;
设置导航栏为透明
[UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleBlackOpa que;
self.navigationController.navigationBar.barStyle = UIBarStyleBlackOpaque;
设置导航栏为默认
[UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleDefault;
self.navigationController.navigationBar.barStyle = UIBarStyleDefault;
设置一个分段控件替换标题视图
NSArray *segmentTextContent = [NSArray arrayWithObjects: NSLocalizedString(@"Image", @""), NSLocalizedString(@"Text", @""), NSLocalizedString(@"Video", @""), nil];
       UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] initWithItems:segmentTextContent];
       segmentedControl.selectedSegmentIndex = 0;
       segmentedControl.autoresizingMask = UIViewAutoresizingFlexib leWidth;
       segmentedControl.segmentedControlStyle = UISegmentedControlStyleB ar;
       segmentedControl.frame = CGRectMake(0, 0, 400, kCustomButtonHeight);
       [segmentedControl addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChang ed];
       self.navigationItem.titleView = segmentedControl;
       [segmentedControl release];
判断选中事件
UISegmentedControl *segmentedControl = (UISegmentedControl *)sender;
       NSLog(@"Segment clicked: %d", segmentedControl.selectedSegmentIndex);
在导航栏上显示一行字
self.navigationItem.prompt = NSLocalizedString(@"Please select the appropriate media type:", @"Page Five Prompt");

          

弹出式菜单栏的做法，其实就是自定义view；然后以某一个视图为根视图，进行其它操作。首先是uiview，uiview中加入scrollview，一般情况下是 scrollview无法滑动，但是加入一个方法之后就可以了

- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event {

    //所点击的位置在view的范围

    if (point.y < 0) {

        [self showFullAppBar];

        [_selectedButton setSelected:NO];

        return NO;

    }

    return YES;