【转】同时创建navigationController和tabBarController

最新推荐文章于 2020-10-17 21:31:20 发布

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最新推荐文章于 2020-10-17 21:31:20 发布

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原文链接：http://www.cnblogs.com/learnios/archive/2012/08/24/2654570.html

本文介绍两种在iOS应用中同时实现TabBar与NavigationBar的方法。第一种是在AppDelegate中设置TabBarController，并为每个子控制器配置NavigationController；第二种是在初始视图控制器中动态创建并管理TabBar。

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上次说了如何通过代码创建TabBar，但是在这一过程中我遇到一个困难，就是又要创建navigationBarController又要创建TabBarController，所以这就比较纠结了。不过经过一番Google之后，还是解决了这个问题，所以在这也就写一下，当做自己总结了。如果有错误还请提出：

第一种方式是在AppDelegate中将tabBarController作为subView，然后再在tabBarController的基础上增加navigationController，代码如下：
在applicationDidFinishLauchingWithOptions中加入以下代码：

-(BOOL)application:(UIApplication*)applicationDidFinishLauchingWithOptions:(NSDictionary*)lauchingOptions
{self.window =[[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];self.window.backgroundColor =[UIColor whiteColor];UITabBarController*tabBarController =[[[UITabBarController alloc] init]autorelease];FirstViewController*firstController =[[FirstViewController alloc] initWithNibName:nil bundle:nil];UINavigationController*firstNavigation =[[[UINavigationController alloc] initWithRootViewController:firstController]autorelease];[firstController release];SecondViewController*secondController =[[SecondViewController alloc] initWithNibName:nil bundle:nil];UINavigationController*secondNavigation =[[[UINavigationController alloc] initWithRootViewController:secondController]autorelease];[secondController release];

    tabBarController.viewControllers =[NSArray arrayWithObjects:firstNavigation,secondNavigation,nil];[window addSubview:tabBarController.view];[window makeKeyAndVisible];}

这样之后分别在FirstViewController.m和SecondViewController.m里面加入如下代码：

-(id)init
{self=[super initWithNibName:nil bundle:nil];if(self){UITabBarItem*tabBarItem =[self tabBarItem];[tabBarItem setTitle]=@"xxx";[tabBarItem setImage]=[UIImage imageNamed:@"xxxxx"];}returnself;}-(id)initWithNibName:(NSString*)nibName bundle:(NSBundle*bundle){return[self init];}

这样的话，就创建了既有navigationBar又有TabBar的应用了，而且这种方法是tabBar在每个界面都是存在的。

第二种方法，仅仅是在一个页面上显示tabBar，这种方法不像上一种，需要将两个tabBar的界面放在一个根视图（假设为InitialViewController），代码如下：
在applicationDidFinishLauchingWithOptions中加入以下代码：

-(BOOL)application:(UIApplication*)applicationDidFinishLauchingWithOptions:(NSDictionary*)lauchingOptions
{self.window =[[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];self.window.backgroundColor =[UIColor whiteColor];InitialViewController*initial =[[[InitialViewController alloc]init]autorelease];UINavigationController*navigationController =[[[UINavigationController alloc]initWithRootViewController:initial]autorelease];[self.window addSubview:navigationController.view];[self.window makeKeyAndVisible];}

然后在InitialViewController.m中import需要加载到tabBar的ViewController，加上如下方法：

-(id)initWithNibName:(NSString*)nibNameOrNil bundle:(NSBundle*)nibBundleOrNil
{if(self=[super initWithNibName:nil bundle:nil]){FirstViewController*firstController =[[FirstViewController alloc]init];UIImage*image1 =[UIImage imageNamed:@"tabBar1.png"];
        firstController.tabBarItem =[[[UITabBarItem alloc] initWithTitle:@"xxxx" image:image1 tag:0]autorelease];SecondViewController*secondController =[[SecondViewController alloc] init];UIImage*image2 =[UIImage imageNamed:@"tabBar2.png"];
        secondController.tabBarItem =[[[UITabBarItem alloc] initWithTitle:@"xxxx" image:image2 tag:0]autorelease];// 组装TabBarself.viewControllers =[NSArray arrayWithObjects:firstController,secondController,nil];[firstController release];[secondController release];}returnself;}