方法一

用自定義tabBar替換系統(tǒng)tabBar, 然后調(diào)用self.hidesBottomBarWhenPushed = YES直接隱藏

代碼實(shí)現(xiàn)

自定義tabBar

首先自定義一個(gè)tabBar繼承于UItabBar

tabBar.png

- (instancetype)initWithFrame:(CGRect)frame {
    
    self = [super initWithFrame:frame];
    
    if (self) {
    
        //添加發(fā)布按鈕
        UIButton *publishButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [publishButton setBackgroundImage:[UIImage imageNamed:@"tabBar_publish_icon"]
                                 forState:UIControlStateNormal];
        [publishButton setBackgroundImage:[UIImage imageNamed:@"tabBar_publish_click_icon"]
                                 forState:UIControlStateSelected];
        [self addSubview:publishButton];
        self.pButton = publishButton;
    }
    return self;
}

- (void)layoutSubviews {
    [super layoutSubviews];
    
    //設(shè)置發(fā)布按鈕的 frame
    self.pButton.size = self.publishButton.currentBackgroundImage.size;
    self.pButton.center = CGPointMake(self.width * 0.5, self.height * 0.5);
    
    //設(shè)置其他 UITabBarButton 的 frame
    CGFloat buttonY = 0;
    CGFloat buttonW = self.width / 5;
    CGFloat buttonH = self.height;
    
    NSInteger buttonIndex = 0;
    
    for (UIView *button in self.subviews) {
        
        /**
         計(jì)算按鈕 X 值, 為了空出中間的距離
         從第二個(gè)tabBarButton起, 第三個(gè)按鈕為我們自定義的按鈕, 第四個(gè)第五個(gè)為系統(tǒng)的按鈕
         index從0起, 那么當(dāng)buttonIndex > 1
         也就是我們看到的第四個(gè)按鈕起
         X值就為按鈕寬度 * (按鈕下標(biāo) + 1)
         */
        CGFloat buttonX = 0;
        
        if (buttonIndex > 1) {
            buttonX = buttonW * (buttonIndex + 1);
        } else {
            buttonX = buttonW * buttonIndex;
        }
        
        //如果按鈕不是tabBarButton, 那么不管它, 繼續(xù)
        if (![button isKindOfClass:NSClassFromString(@"UITabBarButton")]) {
            continue;
        }
        
        button.frame = CGRectMake(buttonX, buttonY, buttonW, buttonH);
        
        //增加索引
        buttonIndex++;
    }
}

自定義tabBarController

在tabBarController中用自定義tabBar替換系統(tǒng)自身tabBar
注意:

self.tabBar = sinaTabBar;

是行不通的, 大家可以試試, 因?yàn)閟elf.tabBar是私有屬性.
但是可以用****KVC****替換

SinaTabBar *sinaTabBar = [[SinaTabBar alloc] init];
    
[sinaTabBar.pButton addTarget:self
                             action:@selector(popToView)
                   forControlEvents:UIControlEventTouchUpInside];
    
    //替換系統(tǒng)tabBar為自定義的
[self setValue:sinaTabBar forKeyPath:@"tabBar"];

完整代碼

自定義tabBarController實(shí)現(xiàn)類(lèi)微博tabBar

#import "SinaTabBarController.h"
#import "FirstController.h"
#import "SecondController.h"
#import "ThirdController.h"
#import "FourthController.h"
#import "SinaTabBar.h"

@interface SinaTabBarController ()

@property (nonatomic, strong) UIView *popView;

@end

@implementation XMGTabBarController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    //添加子控制器
    [self addVC:[[FirstController alloc] init]
          title:@"一"
          image:@"tabBar_First_icon"
  selectedImage:@"tabBar_First_icon_click"];
    
    [self addVC:[[SecondController alloc] init]
          title:@"二"
          image:@"tabBar_second_icon"
  selectedImage:@"tabBar_second_icon_click"];
    
    [self addVC:[[ThirdController alloc] init]
          title:@"三"
          image:@"tabBar_third_icon"
  selectedImage:@"tabBar_third_icon_click"];
    
    [self addVC:[[FourthController alloc] init]
          title:@"四"
          image:@"tabBar_fourth_icon"
  selectedImage:@"tabBar_fourth_icon_click"];
    
    SinaTabBar *sinaTabBar = [[SinaTabBar alloc] init];
    
    //彈出 popView 事件
    [sinaTabBar.pButton addTarget:self
                                action:@selector(popToView)
                      forControlEvents:UIControlEventTouchUpInside];
    
    //更換 tabBar
    [self setValue:sinaTabBar forKeyPath:@"tabBar"];
}

/**
 初始化自控制器
 
 @param title             tabBarItem名
 @param imageName         圖片名
 @param selectedImageName 選中圖片名
 */
- (void)addVC:(UIViewController *)vc
        title:(NSString *)title
        image:(NSString *)imageName
selectedImage:(NSString *)selectedImageName {
    
    vc.tabBarItem.title = title;
    vc.tabBarItem.image = [UIImage imageNamed:imageName];
    vc.tabBarItem.selectedImage = [UIImage imageNamed:selectedImageName];
    
    UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:vc];
    
    [self addChildViewController:nav];
}

#pragma mark - 點(diǎn)擊彈出的視圖
- (void)popToView {

    //點(diǎn)擊中間的按鈕彈出一個(gè)視圖
    self.popView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, kScreenWidth, kScreenHeight)];
    self.popView.backgroundColor = [UIColor whiteColor];
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(100, 100, 100, 40)];
    label.text = @"彈出視圖";
    label.textColor = [UIColor blackColor];
    [self.popView addSubview:label];
    [self.view addSubview:self.popView];
    
    //底部關(guān)閉按鈕
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = CGRectMake(0, kScreenHeight - 49, kScreenWidth, 49);
    [button setImage:[UIImage imageNamed:@"tabBar_publish_icon"] forState:UIControlStateNormal];
    button.backgroundColor = [UIColor lightGrayColor];
    [button addTarget:self action:@selector(tapToRemove) forControlEvents:UIControlEventTouchUpInside];
    [self.popView addSubview:button];
}

#pragma mark - 點(diǎn)擊彈出視圖上的關(guān)閉按鈕
- (void)tapToRemove {
    //移出當(dāng)前遮蓋的視圖
    [self.popView removeFromSuperview];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

此方法直接在二級(jí)頁(yè)面控制器中調(diào)用self.hidesBottomBarWhenPushed = YES即可隱藏自定義的tabBar

方法二

不用新建繼承于tabBar的子控件
隱藏系統(tǒng)tabBar, 用和 tabBar 一樣高度的View添加在 tabBar 處, 這個(gè)方法不可以用self.hidesBottomBarWhenPushed = YES方法實(shí)現(xiàn)跳轉(zhuǎn)隱藏

代碼實(shí)現(xiàn)

自定義tabBarController

在自定義tabBarController聲明方法中添加
@property (nonatomic, strong) UIView *sinaTabBar;
在.m中實(shí)現(xiàn)代碼

#import "SinaTabBarController.h"
#import "FViewController.h"
#import "SViewController.h"
#import "TViewController.h"
#import "FOViewController.h"

#define ScreenWidth [UIScreen mainScreen].bounds.size.width
#define ScreenHeight [UIScreen mainScreen].bounds.size.height

@interface SinaTabBarController ()

//中間彈出視圖
@property (nonatomic, strong) UIView *popView;

@end

@implementation SinaTabBarController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    [self setTabBar];
    [self setPopView];
    
    FViewController *first = [[FViewController alloc] init];
    SViewController *second = [[SViewController alloc] init];
    TViewController *third = [[TViewController alloc] init];
    FOViewController *fourth = [[FOViewController alloc] init];
    
    UINavigationController *firstNav = [[UINavigationController alloc] initWithRootViewController:first];
    UINavigationController *secondNav = [[UINavigationController alloc] initWithRootViewController:second];
    UINavigationController *thirdNav = [[UINavigationController alloc] initWithRootViewController:third];
    UINavigationController *fourthNav = [[UINavigationController alloc] initWithRootViewController:fourth];
    
    self.viewControllers = @[firstNav, secondNav, thirdNav, fourthNav];
}

#pragma mark - 點(diǎn)擊彈出視圖上的關(guān)閉按鈕
- (void)tapToRemove {
    //移出當(dāng)前遮蓋的視圖
    [self.popView removeFromSuperview];
}

#pragma mark - 點(diǎn)擊自定義的 tabBar 視圖上的按鈕
- (void)tapButton:(UIButton *)button {
    
    if (button.tag == 2) {
        [self.view addSubview:self.popView];
    } else if (button.tag >= 3) {
        //因?yàn)橛形鍌€(gè)按鈕, 而只有4個(gè) viewController, selectedIndex 會(huì)向前移動(dòng)一個(gè)
        [self setSelectedIndex:button.tag - 1];
    } else {
        [self setSelectedIndex:button.tag];
    }
}

#pragma mark - 配置 tabBarView
- (void)setTabBar {
    
    self.tabBar.hidden = YES;
    
    self.sinaTabBar = [[UIView alloc] initWithFrame:self.tabBar.frame];
    self.sinaTabBar.backgroundColor = [UIColor colorWithRed:0.134 green:0.283 blue:0.344 alpha:0.195];
    self.sinaTabBar.tag = 1000;
    [self.view addSubview:self.sinaTabBar];
    
    for (NSInteger i = 0; i < 5; i++) {
        UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
        button.frame = CGRectMake(i * ScreenWidth / 5, 0, ScreenWidth * 0.2, self.tabBar.frame.size.height);
        UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"tabBar%ld", i]];
        [button setImage:image forState:UIControlStateNormal];
        button.tag = i;
        [button addTarget:self action:@selector(tapButton:) forControlEvents:UIControlEventTouchUpInside];
        [self.sinaTabBar addSubview:button];
    }
    
}

#pragma mark - 初始化彈出的視圖
- (void)setPopView {
    
    //點(diǎn)擊中間的按鈕彈出一個(gè)視圖
    self.popView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, ScreenWidth, ScreenHeight)];
    self.popView.backgroundColor = [UIColor whiteColor];
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(200, 200, 100, 40)];
    label.text = @"彈出視圖";
    label.textColor = [UIColor blackColor];
    [self.popView addSubview:label];
    
    //底部關(guān)閉按鈕
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = CGRectMake(0, ScreenHeight - 49, ScreenWidth, 49);
    [button setImage:[UIImage imageNamed:@"5"] forState:UIControlStateNormal];
    button.backgroundColor = [UIColor lightGrayColor];
    [button addTarget:self action:@selector(tapToRemove) forControlEvents:UIControlEventTouchUpInside];
    [self.popView addSubview:button];
}

- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

跳轉(zhuǎn)隱藏

在二級(jí)頁(yè)面控制器中調(diào)用兩個(gè)視圖加載方法:

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    
    UIView *sinaBar = [self.tabBarController.view viewWithTag:1000];
    [UIView animateWithDuration:0.25 animations:^{
        sinaBar.frame = CGRectMake(0, kScreenHeight, kTabBarWidth, kTabBarHeight);
    }];
    
}

- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
    
    UIView *sinaBar = [self.tabBarController.view viewWithTag:1000];
    [UIView animateWithDuration:0.25 animations:^{
        sinaBar.frame = CGRectMake(0, kScreenHeight- kTabBarHeight, kTabBarWidth, kTabBarHeight);
    }];
}

這樣會(huì)有一個(gè)隱藏的動(dòng)畫(huà)效果, 也可以不用, 就和系統(tǒng)的隱藏方法一樣了

PS:

方法一中也可以在viewWill的兩個(gè)方法中用偏移量解決
self.tabBarcontroller.tabBar.frame = (...)

彈出的View上子控件的動(dòng)畫(huà)

這里推薦一個(gè)國(guó)外大牛的三方
facebook/pop
動(dòng)畫(huà)很全面了
自己設(shè)置好初始坐標(biāo)和結(jié)束坐標(biāo), 添加動(dòng)畫(huà)
這里就不再贅述了