@interface AppDelegate ()
@property (nonatomic, retain)UITabBarController *tabBarController;
@end
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];
FirstViewController *firstVC = [[FirstViewController alloc] init];
UINavigationController *firstNaVC = [[UINavigationController alloc] initWithRootViewController:firstVC];
firstNaVC.tabBarItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemRecents tag:1000];
SecondViewController *secondVC = [[SecondViewController alloc] init];
UINavigationController *secondNaVC = [[UINavigationController alloc] initWithRootViewController:secondVC];
secondNaVC.tabBarItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemBookmarks tag:1001];
self.tabBarController = [[UITabBarController alloc] init];
self.tabBarController.viewControllers = @[firstNaVC, secondNaVC];
[self.window addSubview:self.tabBarController.view];
self.window.rootViewController = self.tabBarController;
[self addCenterTabbarButton];
[self.window makeKeyAndVisible];
return YES;
}
- (void)addCenterTabbarButton {
UIButton *centerButton = [UIButton buttonWithType:UIButtonTypeCustom];
// [centerButton setImage:[UIImage imageNamed:@"camera.png"] forState:0];
UIImage *centerImage = [UIImage imageNamed:@"camera.png"];
centerButton.frame = CGRectMake(0, 0, centerImage.size.width, centerImage.size.height);
[centerButton setImage:centerImage forState:0];
[centerButton addTarget:self action:@selector(centerButtonClick:) forControlEvents:UIControlEventTouchUpInside];
CGFloat imageHeight = centerImage.size.height;
CGFloat barHeight = self.tabBarController.tabBar.frame.size.height;
CGFloat delta = imageHeight - barHeight;
if (delta <= 0) {
centerButton.center = self.tabBarController.tabBar.center;
} else {
CGPoint center = self.tabBarController.tabBar.center;
center.y = center.y - delta / 2.0;
centerButton.center = center;
}
[self.tabBarController.view addSubview:centerButton];
}
- (void)centerButtonClick:(UIButton *)button {
NSLog(@"centerButton did clicked");
}
自定义UITabBarController
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