自定義UITabBarController

#import "JWTabBarButton.h"
#import "JWTabBarController.h"

#import "ViewController1.h"
#import "ViewController2.h"
#import "ViewController13.h"
#import "ViewController14.h"
@interface JWTabBarController ()
@property (nonatomic,weak) UIButton *selectedButton;
@end

@implementation JWTabBarController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self createControllers];
    [self createTabBar];
  
    self.tabBar.backgroundColor = HEXCOLOR(0xffffff);
    self.tabBar.translucent = NO;
    // Do any additional setup after loading the view.
}
- (void)createControllers{
    ViewController1 *View1 = [[ViewController1 alloc]init];
    ViewController2 *View2 = [[ViewController2 alloc] init];
    ViewController3 *View3 = [[ViewController3 alloc] init];
    ViewController4 *View4 = [[ViewController4 alloc] init];
    
    NSArray *vcArr = @[View1,View2,View3,View4];
    NSMutableArray *navVCArr = [NSMutableArray array];
    for (int i = 0; i < vcArr.count; i++) {
       
            JWNavigationController *nav = [[JWNavigationController alloc] initWithRootViewController:vcArr[i]];
            [navVCArr addObject:nav];
     
    }
    self.viewControllers = navVCArr;

}
/**
 *  建立TabBar
 */
- (void)createTabBar{
    // 1 移除TabbarButton
    for (UIView *child in self.tabBar.subviews) {
        if ([child isKindOfClass:[UIControl class]]) {
            [child removeFromSuperview];
        }
    }
    
    // 2 建立button
    NSArray *titles = @[@"View1",@"View2",@"View3",@"View4"];
    
    for (NSInteger i = 0; i < titles.count; i++) {
        JWTabBarButton *button = [JWTabBarButton buttonWithType:UIButtonTypeCustom];
        button.frame = CGRectMake((WIDTH/3.0) * i, 0, WIDTH/3.0, 49);
        [button setTitle:titles[i] forState:UIControlStateNormal];
        [button setImage:[UIImage imageNamed:images[i]] forState:UIControlStateNormal];
        [button setTitleColor:HEXCOLOR(0x6b6b6b) forState:UIControlStateNormal];
        [button setTitleColor:HEXCOLOR(0xff645f) forState:UIControlStateSelected];
        button.titleLabel.textAlignment = NSTextAlignmentCenter;
        button.titleLabel.font = [UIFont boldSystemFontOfSize:9];
        NSString *selectedImage = [NSString stringWithFormat:@"%@_selected",images[i]];
        UIImage *image = [UIImage imageNamed:selectedImage];
        [button setImage:image forState:UIControlStateSelected];
        [button setImage:image forState:UIControlStateHighlighted];
        button.tag = 1000 + i;
        button.alpha = 1;
        [button addTarget:self action:@selector(selectAction:) forControlEvents:UIControlEventTouchUpInside];
        
        if (i == self.tabBarSelectIndex ) {
            button.selected = YES;
            self.selectedButton = button;
            
        }else{
            button.selected = NO;
        }
        
        [self.tabBar addSubview:button];
        
    }

}

- (void)selectAction:(JWTabBarButton *)button{
    if (button.tag != self.selectedButton.tag) {
        self.selectedButton.selected = NO;
        button.selected = YES;
        self.selectedButton = button;
        self.selectedIndex = self.selectedButton.tag - 1000;
    }
    self.tabBarSelectIndex = (NSInteger)self.selectedButton.tag -1000;
}

- (void)setTabBarSelectIndex:(NSInteger)tabBarSelectIndex{
    _tabBarSelectIndex = tabBarSelectIndex;
    if (self.selectedButton.tag -1000 != tabBarSelectIndex) {
        JWTabBarButton * btn = (JWTabBarButton *)[self.tabBar viewWithTag:tabBarSelectIndex+1000];
        btn.selected = YES;
        self.selectedButton.selected = NO;
        self.selectedButton = btn;
        
    }
    self.selectedIndex = _tabBarSelectIndex;
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}



===========================================================

#import "JWTabBarButton.h"

@implementation JWTabBarButton

/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    // Drawing code
}
*/
- (CGRect)imageRectForContentRect:(CGRect)contentRect {
    return CGRectMake((contentRect.size.width - 24) / 2, 9, 24, 24);
}

- (CGRect)titleRectForContentRect:(CGRect)contentRect {
    return  CGRectMake(contentRect.size.width * .15, 37, contentRect.size.width * .7, 11);
}
@end