完全自定义 TabBar

//
//  CustomTabBarController.h
//  Dream
//
//  Created by mac on 14-10-17.
//  Copyright (c) 2014年 HM. All rights reserved.
//

//标记一下方向
typedef enum
{
    ZYSlideDirectionRight = ,
    ZYSlideDirectionLeft

} ZYSlideDirection;

#import <UIKit/UIKit.h>

@interface CustomTabBarController : UIViewController<UINavigationControllerDelegate>
{
    UIView *_myTabBarView;
}
@property (retain, nonatomic) NSArray *viewControllers;
@property (retain, nonatomic) NSArray *previousNavViewController;
@property (retain, nonatomic) NSArray *buttonArray;
@property (retain, nonatomic) NSArray *normalImageArray;
@property (retain, nonatomic) NSArray *highLightImageArray;
@property (retain, nonatomic) NSArray *nameArray;
@property (assign, nonatomic) int selectedIndex;

- (instancetype)initWithNormalImage:(NSArray *)normalImageArray highLightImage:(NSArray *)highLightImageArray BtnName:(NSArray *)nameArray;

- (void)tabBarButtonClick:(id)sender;

- (void)showTabBar:(ZYSlideDirection)direction animated:(BOOL)isAnimated;
- (void)hideTabBar:(ZYSlideDirection)direction animated:(BOOL)isAnimated;

@end

//
//  CustomTabBarController.m
//  Dream
//
//  Created by mac on 14-10-17.
//  Copyright (c) 2014年 HM. All rights reserved.
//

//动画持续时间，该时间与压栈和出栈时间相当
#define SLIDE_ANIMATION_DURATION 0.33

#import "CustomTabBarController.h"
#import "Header.h"

@interface CustomTabBarController ()
@property (retain, nonatomic) NSArray *labArray;
@property (retain, nonatomic) NSArray *imageArray;
@end

@implementation CustomTabBarController

- (void)dealloc
{
    [_myTabBarView release];
    self.viewControllers = nil;
    self.normalImageArray = nil;
    self.highLightImageArray = nil;
    self.nameArray = nil;
    self.previousNavViewController = nil;
    self.buttonArray = nil;
    self.labArray = nil;
    self.imageArray = nil;
    [super dealloc];
}

- (instancetype)initWithNormalImage:(NSArray *)normalImageArray highLightImage:(NSArray *)highLightImageArray BtnName:(NSArray *)nameArray
{
    if (self = [super init])
    {
        _selectedIndex = -;
        self.normalImageArray = normalImageArray;
        self.highLightImageArray = highLightImageArray;
        self.nameArray = nameArray;

    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    self.view.backgroundColor = [UIColor whiteColor];

    _myTabBarView = [[UIView alloc]initWithFrame:CGRectMake(, , , )];
    [self.view addSubview:_myTabBarView];

    UIImageView *image = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"adv_bottom.png"]];
    image.frame = CGRectMake(, , , );
    [_myTabBarView addSubview:image];
    [image release];

    NSMutableArray *arrayB = [NSMutableArray array];
    NSMutableArray *arrayI = [NSMutableArray array];
    NSMutableArray *arrayL = [NSMutableArray array];

    for (int i = ; i < _nameArray.count; i ++)
    {
        UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
        btn.frame = CGRectMake(+*i, , , );
        btn.tag = i;
//        [btn setImage:[UIImage imageNamed:_normalImageArray[i]] forState:UIControlStateNormal];
//        [btn setImage:[UIImage imageNamed:_highLightImageArray[i]] forState:UIControlStateSelected];
        [btn addTarget:self action:@selector(tabBarButtonClick:) forControlEvents:UIControlEventTouchUpInside];
        [_myTabBarView addSubview:btn];
        [arrayB addObject:btn];

        UIImageView *imageView= [[UIImageView alloc]initWithFrame:CGRectMake(, , , )];
        imageView.image = [UIImage imageNamed:_normalImageArray[i]];
        imageView.highlightedImage = [UIImage imageNamed:_highLightImageArray[i]];
        [btn addSubview:imageView];

        [arrayI addObject:imageView];
        [imageView release];

        UILabel *lab = [[[UILabel alloc]init] autorelease];
        lab.text = _nameArray[i];
        lab.textAlignment = NSTextAlignmentCenter;
        lab.font = [UIFont systemFontOfSize:];
        lab.frame = CGRectMake(, , , );
        [btn addSubview:lab];

        [arrayL addObject:lab];
        [lab release];
    }
    self.buttonArray = arrayB;
    self.imageArray = arrayI;
    self.labArray = arrayL;

    if (_selectedIndex == -)
    {
        self.selectedIndex = ;
    }
    else
    {
        self.selectedIndex = _selectedIndex;
    }

}

- (void)setSelectedIndex:(int)selectedIndex
{
    //如果索引值没有改变不做其他操作
    if (_selectedIndex == selectedIndex) return;

    if (_selectedIndex >= )
    {
        //找出对应索引的视图控制器
        UIViewController *priviousViewController = [_viewControllers objectAtIndex:_selectedIndex];
        //移除掉
        [priviousViewController.view removeFromSuperview];

        UIButton *btn = _buttonArray[_selectedIndex];
        btn.selected = NO;

        UILabel *lab = _labArray[_selectedIndex];
        lab.textColor = [UIColor blackColor];

        UIImageView *image = _imageArray[_selectedIndex];
        image.image = [UIImage imageNamed:_normalImageArray[_selectedIndex]];

    }

    //记录一下当前的索引
    _selectedIndex = selectedIndex;

    //获得对应的按钮并且设置为高亮状态下的图片
    UIButton *currentButton = _buttonArray[_selectedIndex];
    currentButton.selected = YES;
    UILabel *lab = _labArray[_selectedIndex];
    lab.textColor = PINK(0.6);
    UIImageView *image = _imageArray[_selectedIndex];
    image.image = [UIImage imageNamed:_highLightImageArray[_selectedIndex]];

    //获得对应的视图控制器
    UIViewController *currentViewController = [_viewControllers objectAtIndex:_selectedIndex];

    //如果此条件成立表示当前是第一个，即“导航控制器”
    if ([currentViewController isKindOfClass:[UINavigationController class]])
    {
        //设置导航控制器的代理
        ((UINavigationController *)currentViewController).delegate = self;
    }
    //设置当前视图的大小
    currentViewController.view.frame = CGRectMake(, , , self.view.bounds.size.height - );

    //添加到Tab上
    [self.view addSubview:currentViewController.view];

    //把视图放到TabBar下面
    [self.view sendSubviewToBack:currentViewController.view];

}

- (void)tabBarButtonClick:(id)sender
{
    //获得索引
    UIButton *btn = (UIButton *)sender;
    int index = (int)btn.tag;

    //用self.赋值默认会调set方法
    self.selectedIndex = index;
}

#pragma mark -
#pragma mark UINavigationControllerDelegate

- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
//    NSLog(@"vc is %@",viewController);
    /*
     第一次加载根视图:previousNavViewController当前导航控制器里面的视图控制器数组
     之后显示视图:previousNavViewController操作前的视图控制器数组
     */
    if (!_previousNavViewController)
    {
        //导航控制器中的视图数组
        self.previousNavViewController = navigationController.viewControllers;
    }

    /*
     是否为压栈的标记，初始化为NO
     如果原来的控制器数不大于当前导航的视图控制器数表示是压栈
     */
    BOOL isPush = NO;

    if ([_previousNavViewController count] <= [navigationController.viewControllers count])
    {
        isPush = YES;
    }

    /*
     上一个视图控制器当压栈的时候底部条是否隐藏
     当前视图控制器当压栈的时候底部条是否隐藏
     这两个视图控制器有可能是同一个
     */
    BOOL isPreviousHidden = [[_previousNavViewController lastObject] hidesBottomBarWhenPushed];

    BOOL isCurrentHidden = viewController.hidesBottomBarWhenPushed;
    //    [[navigationController.viewControllers lastObject] hidesBottomBarWhenPushed]

    //重新记录当前导航器中的视图控制器数组
    self.previousNavViewController = navigationController.viewControllers;

    /*
     如果状态相同不做其他操作
     如果上一个显示NO，这个隐藏YES，则隐藏TabBar
     如果上一个隐藏YES，这个显示NO，则显示TabBar
     */
    if (!isPreviousHidden && !isCurrentHidden)
    {
        return;
    }
    else if(isPreviousHidden && isCurrentHidden)
    {
        return;
    }
    else if(!isPreviousHidden && isCurrentHidden)
    {
        //隐藏tabbar 压栈
        [self hideTabBar:isPush ? ZYSlideDirectionLeft : ZYSlideDirectionRight  animated:animated];
    }
    else if(isPreviousHidden && !isCurrentHidden)
    {
        //显示tabbar 出栈
        [self showTabBar:isPush ? ZYSlideDirectionLeft : ZYSlideDirectionRight animated:animated];
    }

}

/*
 显示底部TabBar相关
 需要重置当前视图控制器View的高度为整个屏幕的高度-TabBar的高度
 */
- (void)showTabBar:(ZYSlideDirection)direction animated:(BOOL)isAnimated
{
    //根据压栈还是出栈设置TabBar初始位置
    CGRect tempRect = _myTabBarView.frame;
    tempRect.origin.x = self.view.bounds.size.width * ( (direction == ZYSlideDirectionRight) ? - : );
    _myTabBarView.frame = tempRect;

    //执行动画
    [UIView animateWithDuration:isAnimated ? SLIDE_ANIMATION_DURATION :  delay: options: animations:^
     {
         //动画效果
         CGRect tempRect = _myTabBarView.frame;
         tempRect.origin.x = ;
         _myTabBarView.frame = tempRect;

     }
                     completion:^(BOOL finished)
     {
         //动画结束时
         //重置当前视图控制器View的高度为整个屏幕的高度-TabBar的高度
         UIViewController *currentViewController = [_viewControllers objectAtIndex:_selectedIndex];

         CGRect viewRect = currentViewController.view.frame;
         viewRect.size.height = self.view.bounds.size.height - ;
         currentViewController.view.frame = viewRect;
     }];
}

/*
 隐藏底部TabBar相关
 需要重置当前视图控制器View的高度为整个屏幕的高度
 */
- (void)hideTabBar:(ZYSlideDirection)direction animated:(BOOL)isAnimated
{
    //获得当前视图控制器
    UIViewController *currentViewController = [_viewControllers objectAtIndex:_selectedIndex];
    //重置高度
    CGRect viewRect = currentViewController.view.frame;
    viewRect.size.height = self.view.bounds.size.height;
    currentViewController.view.frame = viewRect;

    //设置TabBar的位置
    CGRect tempRect = _myTabBarView.frame;
    tempRect.origin.x = ;
    _myTabBarView.frame = tempRect;

    //采用Block的形式开启一个动画
    [UIView animateWithDuration:isAnimated ? SLIDE_ANIMATION_DURATION :  delay: options: animations:^(void)
     {
         //根据压栈还是出栈设置动画效果
         CGRect tempRect = _myTabBarView.frame;
         tempRect.origin.x = self.view.bounds.size.width * (direction == ZYSlideDirectionLeft ? - : );
         _myTabBarView.frame = tempRect;

     }
                     completion:^(BOOL finished){}
     ];
}

@end