UITabBarController，UITabBarItem设置

self.tabBarController = [[UITabBarController
alloc] init];

HomeViewController *homeVC = [[HomeViewController
alloc] init];

UINavigationController *nav1 = [[UINavigationController
alloc] initWithRootViewController:homeVC];

UITabBarItem *bar1 = [[UITabBarItem
alloc]initWithTitle:@"首页"
image:[UIImage
imageNamed:@"tab_home"]
tag:101];

//设置选中后的背景图片

[bar1 setSelectedImage:[UIImage
imageNamed:@"tab_home_select"]];

//把bar上的字体向上移4个像素。

nav1.tabBarItem.titlePositionAdjustment =
UIOffsetMake(0, -4);

nav1.tabBarItem = bar1;

//设置背景图片

[[UITabBar
appearance]  setBackgroundImage:[UIImage
imageNamed:@"tab_bacgground"]];

if (IOSSystemVersion>=7) {

//设置选中后bar的颜色，图片和字体都改变

[[UITabBar
appearance]setTintColor:COLOR_HEX_RGB(0xff783a)];

}else

{

//         [[UITabBar appearance]  setBackgroundImage:[UIImage imageNamed:@"tab_bacgground"]];

//设置选中后字体的颜色，低版本ios

[[UITabBarItem
appearance] setTitleTextAttributes:  [NSDictionary
dictionaryWithObjectsAndKeys:COLOR_HEX_RGB(0xff6600),UITextAttributeTextColor,nil]forState:UIControlStateSelected];

}