自定义UITabBarController

用的时候直接拷贝代码即可.

1.在AppDelegate设置跟控制器为:PQTabBarController

#import "PQTabBarController.h"
@interface AppDelegate ()
@end
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // 1.创建window
    self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
    // 2.创建根控制器
    PQTabBarController *tabBarVc = [[PQTabBarController alloc]init];
    self.window.rootViewController = tabBarVc;
    
    // 3.显示window
    [self.window makeKeyAndVisible];
    return YES;
}

2.自定义TabBar,   PQTabBar.h文件:

#import <UIKit/UIKit.h>
@class PQTabBar;

@protocol PQTabBarDelegate <NSObject>
- (void)tabBar:(PQTabBar *)tabBar didSelectedButtonFrom:(NSInteger)from to:(NSInteger)to;

@end

@interface PQTabBar : UIView
@property(nonatomic,weak)id<PQTabBarDelegate>delegate;
- (void)addTabBarButtonWith:(UITabBarItem *)item;

@end

　　　　　　　　PQTabBar.m文件:

#import "PQTabBar.h"
#import "PQTaBarButton.h"
@interface PQTabBar()

@property (nonatomic,weak)UIButton * currentSelectedBtn;

@end
@implementation PQTabBar



- (void)addTabBarButtonWith:(UITabBarItem *)item{
    // 创建按钮
    PQTaBarButton *btn = [PQTaBarButton buttonWithType:UIButtonTypeCustom];
    [self addSubview:btn];
    // 设置图片
    [btn setBackgroundImage:item.image forState:UIControlStateNormal];
    [btn setBackgroundImage:item.selectedImage forState:UIControlStateSelected];
    // 监听点击事件
    [btn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchDown];
    // 设置默认选中的第0个按钮
    NSInteger count = self.subviews.count;
    if(1 == count){
        [self btnClick:btn];
    }
}

- (void)layoutSubviews
{
    NSInteger count = self.subviews.count;
    CGFloat btnW = self.frame.size.width/5;
    CGFloat btnH = self.frame.size.height;
    for (int i = 0; i < count; i++) {
        // 1.取出对应的按钮
        UIButton *btn = self.subviews[i];
        // 2.计算frame
        CGFloat btnY = 0;
        CGFloat btnX = btnW * i;
        // 3.设置frame
        btn.frame = CGRectMake(btnX, btnY, btnW, btnH);
        
        // 4.设置按钮的tag
        btn.tag = i;
    }
}

- (void)btnClick:(UIButton *)btn
{
     //1.通知代理
    if([self.delegate respondsToSelector:@selector(tabBar:didSelectedButtonFrom:to:)]){
        [self.delegate tabBar:self didSelectedButtonFrom:self.currentSelectedBtn.tag to:btn.tag];
    }

    // 取消上一次选中
    self.currentSelectedBtn.selected = NO;
    // 设置按钮为选中
    btn.selected = YES;
    // 记录当前选中的按钮
    self.currentSelectedBtn = btn;
}


@end

3.自定义TabBarItem.       PQTaBarButton.h文件:

#import <UIKit/UIKit.h>
@interface PQTaBarButton : UIButton
@end

                        PQTaBarButton.m文件中:

#import "PQTaBarButton.h"

@implementation PQTaBarButton
- (void)setHighlighted:(BOOL)highlighted{    
}
@end

4.自定义UITabBarController,    PQTabBarController.h文件

#import <UIKit/UIKit.h>

@interface PQTabBarController : UITabBarController

@end

　　　　　　　　　　　　　　　PQTabBarController.m文件

#import "PQTabBarController.h"
#import "PQGameViewController.h"
#import "PQMenuViewController.h"
#import "PQMessageViewController.h"
#import "PQCommunityViewController.h"
#import "PQReservationViewController.h"
#import "PQTabBar.h"
#import "PQTaBarButton.h"

@interface PQTabBarController ()<PQTabBarDelegate>

@property (nonatomic,weak)PQTabBar * customTabBar;
@end

@implementation PQTabBarController

- (void)viewDidLoad {
    [super viewDidLoad];
    // 2.添加自定义的tabBar
    [self setupTabBar];
    //添加子控制器
    [self setUpAllChlidVc];   

}

- (void)setupTabBar
{
    // 1.添加自定义
    PQTabBar *cutomTabBar = [[PQTabBar alloc]init];
    cutomTabBar.backgroundColor = [UIColor greenColor];
    cutomTabBar.frame = self.tabBar.frame;
    self.customTabBar = cutomTabBar;
    
     // 成为自定义tabBar的代理
    cutomTabBar.delegate = self;
    [self.view addSubview:cutomTabBar];
    
    // 2.删除系统自带
    [self.tabBar removeFromSuperview];
    
}
- (void)setUpAllChlidVc
{
    PQGameViewController *gameVc = (PQGameViewController *)[self addChildVcWithName:@"PQGameViewController" title:@"游戏" image:@"TabBar1" selectedImage:@"avater"];
    
    PQMenuViewController *menuVc = (PQMenuViewController *)[self addChildVcWithName:@"PQMenuViewController" title:@"菜单" image:@"TabBar2" selectedImage:@"avater"];
    
    PQMessageViewController *messageVc = (PQMessageViewController *)[self addChildVcWithName:@"PQMessageViewController" title:@"消息" image:@"TabBar3" selectedImage:@"avater"];
    
    PQCommunityViewController *communityVc = (PQCommunityViewController *)[self addChildVcWithName:@"PQCommunityViewController" title:@"社区" image:@"TabBar4" selectedImage:@"avater"];
    
    PQReservationViewController *reservationVc = (PQReservationViewController *)[self addChildVcWithName:@"PQReservationViewController" title:@"待选" image:@"TabBar5" selectedImage:@"avater"];
    
    self.viewControllers = @[gameVc , menuVc , messageVc , communityVc , reservationVc];
    
}

- (UIViewController *)addChildVcWithName:(NSString *)vcName title:(NSString *)title image:(NSString *)image selectedImage:(NSString *)selectedImage
{
    UIStoryboard *sb = [UIStoryboard storyboardWithName:vcName bundle:nil];
    UIViewController *Vc = sb.instantiateInitialViewController;
    
    //设置对应控制器按钮的图片
    Vc.tabBarItem.image = [UIImage imageNamed:image];
    Vc.tabBarItem.selectedImage = [UIImage imageNamed:selectedImage];// 调用自定义TabBar创建按钮的方法
    [self.customTabBar addTabBarButtonWith:Vc.tabBarItem];
    return Vc;
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];    
}


#pragma mark 代理方法
- (void)tabBar:(PQTabBar *)tabBar didSelectedButtonFrom:(NSInteger)from to:(NSInteger)to{
    
    self.selectedIndex = to;
}

@end