iOS 5自定义标签栏图像垂直对齐

本文介绍了iOS 5自定义标签栏图像垂直对齐的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 限时删除！！ 我的自定义标签栏出现了一些奇怪的行为。图像似乎未正确对齐。这是一个截图（我删除了自己的标签栏背景以突出显示我的问题）：I'm getting some odd behaviour with my custom tab bar. The images seem to be aligned incorrectly. Here is a screenshot (I have removed my own tab bar background to highlight my problem):这是我用来为每个州设置图像的代码：Here is the code I'm using to set the images for each state:self.tabBarController = [[[UITabBarController alloc] init] autorelease];self.tabBarController.viewControllers = [NSArray arrayWithObjects:homeNavController, whatsOnNavController, mapNavController, infoNavController, nil];self.tabBarController.delegate = self;// For iOS 5 only - custom tabsif ([self.tabBarController.tabBar respondsToSelector:@selector(selectedImageTintColor)]){ // Set the background images //[[UITabBar appearance] setBackgroundImage: [UIImage imageNamed:@"nav_bg.png"]]; [[UITabBar appearance] setSelectionIndicatorImage:[UIImage imageNamed:@"nav_over.png"]]; [homeNavController.tabBarItem setFinishedSelectedImage:[UIImage imageNamed:@"nav_home_over"] withFinishedUnselectedImage:[UIImage imageNamed:@"nav_home"]]; [whatsOnNavController.tabBarItem setFinishedSelectedImage:[UIImage imageNamed:@"nav_whats_on_over"] withFinishedUnselectedImage:[UIImage imageNamed:@"nav_whats_on"]]; [mapNavController.tabBarItem setFinishedSelectedImage:[UIImage imageNamed:@"nav_map_over"] withFinishedUnselectedImage:[UIImage imageNamed:@"nav_map"]]; [infoNavController.tabBarItem setFinishedSelectedImage:[UIImage imageNamed:@"nav_info_over"] withFinishedUnselectedImage:[UIImage imageNamed:@"nav_info"]];}我所有的替换标签图像都是正确尺寸的（49像素）非视网膜版本的高和80像素宽。）All of my replacement tab images are correctly sized (49 pixels high and 80 pixels wide for the non-retina versions).可能导致这种奇怪行为的原因是什么？What could be causing this odd behaviour?这是一个更新的截图，背景到位：Here is an updated screenshot with the background in place:推荐答案It turns out that you should always have text inside a tabitem. The space was created by blank text. 这篇关于iOS 5自定义标签栏图像垂直对齐的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 1403页，肝出来的..