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私のUITabBarItemsがUITabBarの中央に垂直に表示されません。私は私のUITabBarのカスタムサイズの背景画像を使用しています。UITabBarItemsがカスタムサイズのUITabBarにセンタリングしていません
UITabBarController *tabController = [[UITabBarController alloc] init];
UITabBar *tabBar = [controller tabBar];
UIImage *backgroundImage = [UIImage imageNamed:@"Images/bottomBar.png"];
[tabBar setBackgroundImage:backgroundImage];
SplashScreenController *introController = [[SplashScreenController alloc] init];
UIImage *introImage = [UIImage imageNamed:@"Images/navIntro.png"];
UITabBarItem *introItem = [[UITabBarItem alloc] initWithTitle:@"Intro" image:introImage tag:0];
[introController setTabBarItem:introItem];
NSMutableArray *controllers = [[NSMutableArray alloc] init];
[controllers addObject:introController];
NSArray *controllers = [self createControllers];
[tabController setViewControllers:controllers];