单手操作 iPhone 6 Plus 切换 TabBar 一直是一件很痛苦的事情，而滑动切换是一种不错的解决方案，希望这种交互方式能够得到广泛地应用。
你可以通过 CocoaPods 来安装 WXTabBarController ：
pod 'WXTabBarController', '~> 0.1'WXTabBarController 的用法与系统 UITabBarController 的用法是完全一致的：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
self.window.rootViewController = self.navigationController;
[self.window makeKeyAndVisible];
return YES;
}
- (UINavigationController *)navigationController {
if (_navigationController == nil) {
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:self.tabBarController];
navigationController.navigationBar.tintColor = [UIColor colorWithRed:26 / 255.0 green:178 / 255.0 blue:10 / 255.0 alpha:1];
_navigationController = navigationController;
}
return _navigationController;
}
- (WXTabBarController *)tabBarController {
if (_tabBarController == nil) {
WXTabBarController *tabBarController = [[WXTabBarController alloc] init];
ViewController *mainframeViewController = ({
ViewController *mainframeViewController = [[ViewController alloc] init];
UIImage *mainframeImage = [UIImage imageNamed:@"tabbar_mainframe"];
UIImage *mainframeHLImage = [UIImage imageNamed:@"tabbar_mainframeHL"];
mainframeViewController.title = @"微信";
mainframeViewController.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"微信" image:mainframeImage selectedImage:mainframeHLImage];
mainframeViewController.view.backgroundColor = [UIColor colorWithRed:48 / 255.0 green:67 / 255.0 blue:78 / 255.0 alpha:1];
mainframeViewController.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"barbuttonicon_add"]
style:UIBarButtonItemStylePlain
target:self
action:@selector(didClickAddButton:)];
mainframeViewController;
});
ViewController *contactsViewController = ({
ViewController *contactsViewController = [[ViewController alloc] init];
UIImage *contactsImage = [UIImage imageNamed:@"tabbar_contacts"];
UIImage *contactsHLImage = [UIImage imageNamed:@"tabbar_contactsHL"];
contactsViewController.title = @"通讯录";
contactsViewController.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"通讯录" image:contactsImage selectedImage:contactsHLImage];
contactsViewController.view.backgroundColor = [UIColor colorWithRed:115 / 255.0 green:155 / 255.0 blue:6 / 255.0 alpha:1];
contactsViewController;
});
ViewController *discoverViewController = ({
ViewController *discoverViewController = [[ViewController alloc] init];
UIImage *discoverImage = [UIImage imageNamed:@"tabbar_discover"];
UIImage *discoverHLImage = [UIImage imageNamed:@"tabbar_discoverHL"];
discoverViewController.title = @"发现";
discoverViewController.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"发现" image:discoverImage selectedImage:discoverHLImage];
discoverViewController.view.backgroundColor = [UIColor colorWithRed:32 / 255.0 green:85 / 255.0 blue:128 / 255.0 alpha:1];
discoverViewController;
});
ViewController *meViewController = ({
ViewController *meViewController = [[ViewController alloc] init];
UIImage *meImage = [UIImage imageNamed:@"tabbar_me"];
UIImage *meHLImage = [UIImage imageNamed:@"tabbar_meHL"];
meViewController.title = @"我";
meViewController.tabBarItem = [[UITabBarItem alloc] initWithTitle:@"我" image:meImage selectedImage:meHLImage];
meViewController.view.backgroundColor = [UIColor colorWithRed:199 / 255.0 green:135 / 255.0 blue:56 / 255.0 alpha:1];
meViewController;
});******
tabBarController.title = @"微信";
tabBarController.tabBar.tintColor = [UIColor colorWithRed:26 / 255.0 green:178 / 255.0 blue:10 / 255.0 alpha:1];
tabBarController.viewControllers = @[
[[UINavigationController alloc] initWithRootViewController:mainframeViewController],
[[UINavigationController alloc] initWithRootViewController:contactsViewController],
[[UINavigationController alloc] initWithRootViewController:discoverViewController],
[[UINavigationController alloc] initWithRootViewController:meViewController],
];
_tabBarController = tabBarController;
}
return _tabBarController;
}唯一一个需要注意的地方是，整个应用是由 WXTabBarController 的 navigationController 来进行导航的，而不是 Tab 页自己的 navigationController ：
- (void)didClickAddButton:(id)sender {
ViewController *viewController = [[ViewController alloc] init];
viewController.title = @"添加";
viewController.view.backgroundColor = [UIColor colorWithRed:26 / 255.0 green:178 / 255.0 blue:10 / 255.0 alpha:1];
[self.navigationController pushViewController:viewController animated:YES];
}为了更直观地理解这个约定，我们一起来看一下整个应用的导航层次结构图：
目前，WXTabBarController 已经在 MVVMReactiveCocoa 中正式使用，效果如下：
如果你有兴趣为这个库贡献代码的话，请先 Fork 这个库，然后在自己的库上做修改，最后提交 Pull request :
git clone https://github.com/your-username/WXTabBarController.git
cd WXTabBarController
pod installWXTabBarController is available under the MIT license. See the LICENSE file for more info.