UITabBarController的创建等基本方法

  1 #import "AppDelegate.h"
  2 
  3 @interface AppDelegate () <UITabBarControllerDelegate>
  4 
  5 @end
  6 
  7 @implementation AppDelegate
  8 
  9 
 10 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
 11     // Override point for customization after application launch.
 12     
 13     // 1.创建window
 14     self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
 15     self.window.backgroundColor = [UIColor whiteColor];
 16     [self.window makeKeyAndVisible];
 17     
 18     
 19     // 2.创建UITabBarController对象
 20     UITabBarController *mainTabBar = [[UITabBarController alloc] init];
 21     
 22     
 23     // 创建控制器对象
 24     UIViewController *firstVC = [[UIViewController alloc] init];
 25     firstVC.view.backgroundColor = [UIColor cyanColor];
 26     
 27     // 设置tabBarItem
 28     // 第一种方式：系统样式
 29     firstVC.tabBarItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemFeatured tag:100];
 30     
 31     
 32     // 第二种方式：自定义样式
 33     UIViewController *secondVC = [[UIViewController alloc] init];
 34     secondVC.view.backgroundColor = [UIColor orangeColor];
 35     
 36     // 创建图片
 37     UIImage *secondImg = [UIImage imageNamed:@"carGary@2x"];
 38     UIImage *selectSecondImg = [UIImage imageNamed:@"carRed@2x"];
 39     
 40     // 设置图片保留原有样式
 41     secondImg = [secondImg imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
 42     selectSecondImg = [selectSecondImg imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
 43     
 44     secondVC.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"two" image:secondImg selectedImage:selectSecondImg];
 45     
 46 
 47     UIViewController *thirdVC = [[UIViewController alloc] init];
 48     thirdVC.view.backgroundColor = [UIColor redColor];
 49     thirdVC.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"发现" image:[UIImage imageNamed:@"findGray@2x"] tag:101];
 50     
 51     
 52     UIViewController *fourthVC = [[UIViewController alloc] init];
 53     fourthVC.view.backgroundColor = [UIColor greenColor];
 54     
 55     fourthVC.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"用户" image:[UIImage imageNamed:@"userGray@2x"] tag:102];
 56     
 57     
 58     UIViewController *fifthVC = [[UIViewController alloc] init];
 59     fifthVC.view.backgroundColor = [UIColor greenColor];
 60     
 61     fifthVC.tabBarItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemHistory tag:103];
 62     
 63     
 64     UIViewController *sixVC = [[UIViewController alloc] init];
 65     sixVC.view.backgroundColor = [UIColor greenColor];
 66     
 67     sixVC.tabBarItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemTopRated tag:104];
 68 
 69     
 70     // 设置控制器数组
 71     mainTabBar.viewControllers = @[firstVC, secondVC, thirdVC, fourthVC, fifthVC, sixVC];
 72 //    [mainTabBar addChildViewController:firstVC];
 73 //    [mainTabBar addChildViewController:secondVC];
 74     
 75     // 3.将UITabBarController对象设置为window的根视图控制器
 76     self.window.rootViewController = mainTabBar;
 77     
 78     
 79     // 设置进入应用选中第几个
 80     mainTabBar.selectedIndex = 1;
 81     
 82     
 83 #pragma mark - TabBar的属性
 84     // 修改字体图标等的选中颜色
 85     mainTabBar.tabBar.tintColor = [UIColor greenColor];
 86     
 87     // 设置tabBar的半透明与否
 88     mainTabBar.tabBar.translucent = NO;
 89     
 90     // 设置tabBar的颜色
 91     mainTabBar.tabBar.barTintColor = [UIColor purpleColor];
 92     
 93     // 改变tabBar的位置
 94     [secondVC.tabBarItem setTitlePositionAdjustment:UIOffsetMake(50, 0)];
 95     
 96     
 97     // 设置消息提示
 98     thirdVC.tabBarItem.badgeValue = @"99+";
 99     
100     
101     // 设置代理
102     mainTabBar.delegate = self;
103     
104     return YES;
105 }
106 
107 
108 #pragma mark - 实现代理方法
109 // 清除提示消息
110 - (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController {
111     
112     viewController.tabBarItem.badgeValue = nil;
113 }
114 
115 @end