1.改变UITabBarItem 字体颜色

[[UITabBarItemappearance]setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColorwhiteColor],UITextAttributeTextColor,nil]forState:UIControlStateNormal];

[[UITabBarItemappearance]setTitleTextAttributes:[NSDictionarydictionaryWithObjectsAndKeys:[UIColorcolorWithHexString:"#00C8D3"],UITextAttributeTextColor,nil]forState:UIControlStateSelected];

2.改变UITabBarItem 字体颜色和大小

[[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor blackColor], NSForegroundColorAttributeName, [UIFont fontWithName:@"Helvetica" size:12.0f],NSFontAttributeName,nil] forState:UIControlStateNormal];

[[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor redColor], NSForegroundColorAttributeName, [UIFont fontWithName:@"Helvetica" size:12.0f],NSFontAttributeName,nil] forState:UIControlStateSelected];

    这里需要注意的是在设置字体的时候要选择支持中文的字体，不然的话修改字号是无效的，比如字体设置成“ProximaNova-Semibold”，这种字体本身只支持英语的，不支持中文所以使用该字体并不能调整字体大小

3.改变UITabBarItem的选中和非选中图片

UINavigationController *nav1 = [[UINavigationController alloc] initWithRootViewController:[[ServiceProviderViewController alloc] init]];

nav1.tabBarItem.image = [ImageNamed(@"tabicon1_unselect") imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

nav1.tabBarItem.selectedImage = [ImageNamed(@"tabicon1_select") imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

nav1.tabBarItem.title = @"服务商";

4.改变UITabBarController的颜色

UIView*mView=[[UIViewalloc]initWithFrame:CGRectMake(0,0,320,48)];//这是整个tabbar的颜色

[mViewsetBackgroundColor:[UIColorcolorWithPatternImage:[UIImageimageNamed:@"tabbar.png"]]];

[tab.tabBarinsertSubview:mViewatIndex:1];

mView.alpha=0.8;

5.如何隐藏系统自带的tabbar

有时候有的页面并不需要显示tabbar，但是返回的时候要显示tabbar，举个例子A->B 当A push到 B 时需要设置self.navigationController.hidesBottomBarWhenPushed= YES;

同时在B页面要

- (void)viewWillAppear:(BOOL)animated

{

[superviewWillAppear:animated];

self.tabBarController.tabBar.hidden=YES;

}

- (void)viewWillDisappear:(BOOL)animated

{

[superviewWillDisappear:animated];

self.tabBarController.tabBar.hidden=NO;

}