UITabbar的简单操作和实际应用

简易编辑Tabbar

//**标签栏控制器的初始化

UITabBarController * tabbarC = [[UITabBarController alloc] init];

//设置tabBar的颜色

tabbarC.tabBar.barTintColor = [UIColor brownColor];

//设置按钮颜色

tabbarC.tabBar.tintColor = [UIColor cyanColor];

//**创建视图控制器，类似ViewController

UIViewController * c1 = [[UIViewController alloc] init];

c1.view.backgroundColor = [UIColor greenColor];

//**创建系统自带的UITabBarItem

UITabBarItem * c1Item = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemDownloads tag:0];

//另外两种种初始化方法

UITabBarItem * c2Item = [[UITabBarItem alloc] initWithTitle:@"设置" image:[UIImage imageNamed:@"tab_3"] selectedImage:selectedImage2];

UITabBarItem * c3Item = [[UITabBarItem alloc] initWithTitle:@"首页" image:[UIImage imageNamed:@"tab_0"] tag:0];

//设置右上角红色小气泡

c1Item.badgeValue = @"100";

//**创建好的item赋值给tabBarItem

c1.tabBarItem = c1Item;

//第一种方式添加子控制器

[tabbar addChildViewController:c1];

[tabbar addChildViewController:c2];

[tabbar addChildViewController:c3];

//**第二种方式添加子控制器

tabbarC.viewControllers = @[c1,c2,c3,c4,c5,c6];

//**设置主控制器

self.window.rootViewController = tabbarC;

//**更改显示先后顺序

[self.window makeKeyAndVisible];

//更改选中状态图片UIImageRenderingModeAlwaysOriginal 不做任何修改的图片

self.tabBarItem.selectedImage = [[UIImage imageNamed:@"tab_0"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

Nav + Tabbar

重要：

1、实现UIviewcontroller（继承于此类）的实例化

2、实现UINavigationController（继承于此类）的实例化

3、将viewcontroller 传给navigationcontroller

4、实现UITabBarController（继承于此类）的实例化

5、将navigationcontroller传给tabBarController

6、self.window.rootViewController

//当导航视图控制器压栈时，隐藏tabbar

vc.hidesBottomBarWhenPushed = YES;

1、简单易懂

UITabBarController * tabbarVC = [[UITabBarController alloc] init];

FirstViewController * firstVC = [[FirstViewController alloc] init];

firstVC.title = @"第一页";

UINavigationController * firstNav = [[UINavigationController alloc] initWithRootViewController:firstVC];

SecondViewController * secondVC = [[SecondViewController alloc] init];

secondVC.title = @"第二页";

UINavigationController * secondNav = [[UINavigationController alloc] initWithRootViewController:secondVC];

ThirdViewController * thirdVC = [[ThirdViewController alloc] init];

thirdVC.title = @"第三页";

UINavigationController * thirdNav = [[UINavigationController alloc] initWithRootViewController:thirdVC];

tabbarVC.viewControllers = @[firstNav,secondNav,thirdNav];

tabbarVC.viewControllers = @[firstVC,secondVC,thirdVC];

self.window.rootViewController = tabbarVC;

2、for循环遍历

//以视图控制器的名字创建字符串数组

NSMutableArray * viewControllerNames = [NSMutableArray arrayWithArray:@[@"FirstViewController",@"SecondViewController",@"ThirdViewController"]];

//以视图控制器的标题创建字符串数组

NSArray * titleNames = @[@"第一页",@"第二页",@"第三页"];

//遍历viewControllerNames数组

for (NSInteger i = 0; i < viewControllerNames.count; i++) {

//获取数组中的每一项

NSString * vcName = viewControllerNames[i];//FirstViewController

//将字符串转换为Class类型，并通过Class初始化对象

UIViewController * vc = [[NSClassFromString(vcName) alloc] init];

//设置题目

vc.title = titleNames[i];

//创建导航控制器

UINavigationController * nav = [[UINavigationController alloc] initWithRootViewController:vc];

//nav替换viewControllerNames数组中的字符串

[viewControllerNames replaceObjectAtIndex:i withObject:nav];

}