tabBar : view

// MyTabBarController.h

@interface MyTabBarController : UITabBarController
@end

// MyTabBarController.m

#import "MyTabBarController.h"
#import "ViewController.h"

@interface MyTabBarController ()
{
    NSArray *_vcArray;
    UIButton *_previousBtn;
}
@end

@implementation MyTabBarController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    _vcArray = @[@"新闻", @"阅读", @"视听", @"话题", @"我"];
    NSMutableArray *navCs = [NSMutableArray array];

    for (NSInteger i = 0; i < _vcArray.count; i ++) {
        ViewController *vc = [[ViewController alloc] init];
        vc.title = _vcArray[i];
        UINavigationController *navC = [[UINavigationController alloc] initWithRootViewController:vc];
        [navCs addObject:navC];
    }
    self.viewControllers = navCs;
    [self creatCustomTabBar];
}

- (void)creatCustomTabBar {
    for (UIView *view in self.tabBar.subviews) {
        [view removeFromSuperview];
    }

    for (NSInteger i = 0; i < _vcArray.count; i ++) {
        UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
        if (i == 0) {
            btn.selected = YES;
            _previousBtn = btn;
        }
        btn.frame = CGRectMake(i * self.view.frame.size.width / _vcArray.count, 0, self.view.frame.size.width / _vcArray.count, 49);
        [btn setTitle:_vcArray[i] forState:UIControlStateNormal];
        [btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [btn setTitleColor:[UIColor redColor] forState:UIControlStateSelected];
        btn.titleLabel.font = [UIFont systemFontOfSize:12];
        [btn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
        btn.tag = 1000 + i;
        [self.tabBar addSubview:btn];
    }
}

- (void)btnClick:(UIButton *)btn {
    self.selectedIndex = btn.tag - 1000;
    _previousBtn.selected = NO;
    btn.selected = YES;
    [_previousBtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    [btn setTitleColor:[UIColor redColor] forState:UIControlStateSelected];
    _previousBtn = btn;
}

@end