對于UITabBarController, 大家都不陌生, 但是有時候又不那麼的熟悉, 下面就來再認識一下這個熟悉的陌生人.
以下使用微信的tabBar圖示;
一. 系統UITabBarController基本使用
1.1 基本用法
UITabBarController的使用, 其實很簡單, 這裡直接給出相應代碼:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
// 初始化UITabBarController執行個體對象
UITabBarController *tabBar = [[UITabBarController alloc]init];
// 建立子控制器
UIViewController *vc1 = [[UIViewController alloc]init];
vc1.view.backgroundColor = [UIColor redColor];
// 設定标題
vc1.tabBarItem.title = @"微信";
// 設定選中狀态的圖檔
vc1.tabBarItem.selectedImage = [UIImage imageNamed:@"tabbar_mainframeHL"];
// 設定未選中狀态的圖檔
vc1.tabBarItem.image = [UIImage imageNamed:@"tabbar_mainframe"] ;
// 設定右上角顯示數字(例如: 未讀消息數目)
vc1.tabBarItem.badgeValue = @"100";
// 右上角數字背景色
vc1.tabBarItem.badgeColor = [UIColor greenColor];
UIViewController *vc2 = [[UIViewController alloc]init];
vc2.view.backgroundColor = [UIColor orangeColor];
vc2.tabBarItem.title = @"聯系人";
vc2.tabBarItem.selectedImage = [UIImage imageNamed:@"tabbar_contactsHL"];
vc2.tabBarItem.image = [UIImage imageNamed:@"tabbar_contacts"];
UIViewController *vc3 = [[UIViewController alloc]init];
vc3.view.backgroundColor = [UIColor cyanColor];
vc3.tabBarItem.title = @"發現";
vc3.tabBarItem.image = [UIImage imageNamed:@"tabbar_discover"];
vc3.tabBarItem.selectedImage = [UIImage imageNamed:@"tabbar_discoverHL"];
UIViewController *vc4 = [[UIViewController alloc]init];
vc4.view.backgroundColor = [UIColor whiteColor];
vc4.tabBarItem.title = @"我";
vc4.tabBarItem.image = [UIImage imageNamed:@"tabbar_me"];
vc4.tabBarItem.selectedImage = [UIImage imageNamed:@"tabbar_meHL"];
// 添加子視圖到tabbar
tabBar.viewControllers = @[vc1, vc2, vc3, vc4];
// 設定為window跟視圖
self.window.rootViewController = tabBar;
return YES;
}
以上代碼直接寫在xxAppDelegate.m的上面這個方法裡即可;
效果如下:
注意:這裡使用的是微信的圖示, 是綠色的, 設定完後變成了藍色, 而且上面也沒有設定選中及未選中文字的顔色, 這裡都被預設設定了, 最主要的是沒有顯示我原先圖示的顔色.( 這樣美工是不同意的 ��).
1.2. 顯示原圖
根據上面的問題, 我們先來看看圖示的問題, 為了不被系統渲染成藍色, 這裡我們在設定各個控制器的選中和未選中的圖示的時候, 調用一下UIImage的這個方法即可imageWithRenderingMode:
// 設定選中狀态的圖檔
vc1.tabBarItem.selectedImage = [[UIImage imageNamed:@"tabbar_mainframeHL"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
// 設定未選中狀态的圖檔
vc1.tabBarItem.image = [[UIImage imageNamed:@"tabbar_mainframe"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
這樣就能正确顯示我們原先的圖檔了;
1.3 修改文字顔色
但是文字的顔色并不是我們需要的, 我們可以通過下面的方法, 來修改文字的顔色:
// 未選中狀态下文字顔色
[vc1.tabBarItem setTitleTextAttributes:@{NSForegroundColorAttributeName: [UIColor redColor]} forState:UIControlStateNormal];
// 選中狀态下的文字顔色
[vc1.tabBarItem setTitleTextAttributes:@{NSForegroundColorAttributeName: [UIColor blueColor]} forState:UIControlStateSelected];
這是設定選中和未選中狀态下的标題屬性, 效果如下:
這裡我隻是修改了前兩個控制器的文字, 後面的還是用的預設的.
上面是修改按鈕标題的文字屬性, 按鈕右上角的角标的文字屬性, 可使用下面的方法來修改:
// 未選中狀态下的角标文字顔色
[vc1.tabBarItem setBadgeTextAttributes:@{NSForegroundColorAttributeName: [UIColor blackColor]} forState:UIControlStateNormal];
// 選中狀态下的角标文字顔色
[vc1.tabBarItem setBadgeTextAttributes:@{NSForegroundColorAttributeName: [UIColor orangeColor]} forState:UIControlStateSelected];
以上就是系統自帶UITabBarController及相關屬性的設定, 對于圖示規則的需求基本都能滿足, 如果還有其他的需求, 系統不能滿足的, 就隻能自定義了.
二. 自定義tabBarController
對于自定義的tabBar, 我們一般還是定義為UITabBarController的子類:
這樣我們可以借助UITabBarController的一些屬性和方法, 例如切換控制器; 不用再去寫切換的邏輯;
實際上, 我們說的自定義的tabBar, 對數情況下是自定義的底部的tabBar; 是以, 我們的重點是來設定底部視圖的實作.
我們自定義的時候, 一般有兩種選擇:
- 一種是, 隐藏掉系統的tabBar, 完全重新布局;
- 另一種是, 使用系統的tabBar, 但是自定義tabBarItem
不管是哪一種, 都需要自定義一個tabBarItem, 是以, 先來看看怎麼定義這個tabBarItem;
2.1 自定義item –LZTabBarItem
這個類, 主要做的是布局item, 及響應點選事件
我們定義一個類* LZTabBarItem*, 繼承自UIView, .h聲明檔案如下:
//
// LZTabBarItem.h
// LZTabBarController
//
// Created by Artron_LQQ on 2016/12/12.
// Copyright © 2016年 Artup. All rights reserved.
//
@protocol LZTabBarItemDelegate;
@interface LZTabBarItem : UIView
@property (nonatomic, copy) NSString *icon;
@property (nonatomic, copy) NSString *title;
@property (nonatomic, strong) UIColor *titleColor;
@property (nonatomic, assign) id <LZTabBarItemDelegate> delegate;
@end
@protocol LZTabBarItemDelegate <NSObject>
- (void)tabBarItem:(LZTabBarItem *)item didSelectIndex:(NSInteger)index;
@end
這裡使用代理來回調點選事件; .m實作如下:
//
// LZTabBarItem.m
// LZTabBarController
//
// Created by Artron_LQQ on 2016/12/12.
// Copyright © 2016年 Artup. All rights reserved.
//
#import "LZTabBarItem.h"
static NSInteger defaultTag = ;
@interface LZTabBarItem ()
@property (nonatomic, strong)UIImageView *iconImageView;
@property (nonatomic, strong)UILabel *titleLabel;
@end
@implementation LZTabBarItem
- (instancetype)init {
self = [super init];
if (self) {
self.userInteractionEnabled = YES;
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(itemClicked:)];
[self addGestureRecognizer:tap];
}
return self;
}
// 重寫setTag方法
- (void)setTag:(NSInteger)tag {
[super setTag:tag + defaultTag];
}
- (UIImageView *)iconImageView {
if (_iconImageView == nil) {
_iconImageView = [[UIImageView alloc]init];
_iconImageView.contentMode = UIViewContentModeScaleAspectFit;
[self addSubview:_iconImageView];
}
return _iconImageView;
}
- (UILabel *)titleLabel {
if (_titleLabel == nil) {
_titleLabel = [[UILabel alloc]init];
_titleLabel.textAlignment = NSTextAlignmentCenter;
_titleLabel.font = [UIFont systemFontOfSize:];
_titleLabel.numberOfLines = ;
_titleLabel.textColor = [UIColor grayColor];
[self addSubview:_titleLabel];
}
return _titleLabel;
}
- (void)setIcon:(NSString *)icon {
_icon = icon;
self.iconImageView.image = [UIImage imageNamed:icon];
}
- (void)setTitle:(NSString *)title {
_title = title;
self.titleLabel.text = title;
}
- (void)setTitleColor:(UIColor *)titleColor {
_titleColor = titleColor;
self.titleLabel.textColor = titleColor;
}
- (void)layoutSubviews {
[super layoutSubviews];
CGFloat space = ;
if (self.icon.length > && self.title.length > ) {
CGFloat iconHeight = (CGRectGetHeight(self.frame) - space * )*/ ;
self.iconImageView.frame = CGRectMake(space, space, CGRectGetWidth(self.frame) - * space, iconHeight);
self.titleLabel.frame = CGRectMake(space, CGRectGetMaxY(self.iconImageView.frame) + space, CGRectGetWidth(self.frame) - *space, iconHeight/);
} else if (self.icon.length > ) {
self.iconImageView.frame = CGRectMake(, , CGRectGetWidth(self.frame) - , CGRectGetHeight(self.frame) - );
} else if (self.title.length > ) {
self.titleLabel.frame = CGRectMake(, CGRectGetHeight(self.frame) - , CGRectGetWidth(self.frame) - , );
}
}
- (void)itemClicked:(UITapGestureRecognizer *)tap {
if (self.delegate && [self.delegate respondsToSelector:@selector(tabBarItem:didSelectIndex:)]) {
[self.delegate tabBarItem:self didSelectIndex:self.tag - defaultTag];
}
}
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
// Drawing code
}
*/
@end
其實, 很簡單, 隻是添加了一個imageView, 一個label, 和一個單擊手勢來響應點選事件. 這裡我是在* layoutSubviews*方法裡來布局子視圖的, 這樣當視圖frame改變的時候, 其子視圖會做相應的調整;
這樣,tabBarItem的自定義就完成了,接下來就是自定義tabBar;
tabBar的定義, 有兩種方法:
- 一個是繼承自UIView, 完全自定義;
- 一個是繼承自UITabBar;
2.2 繼承自UIView
先來看一下繼承自UIView, 完全自定義的方法:
//
// LZTabBar.h
// LZTabBarController
//
// Created by Artron_LQQ on 2016/12/12.
// Copyright © 2016年 Artup. All rights reserved.
//
#import <UIKit/UIKit.h>
@class LZTabBarItem;
@protocol LZTabBarDelegate;
@interface LZTabBar : UIView
@property (nonatomic, strong)NSArray<LZTabBarItem *> *items;
@property (nonatomic, assign)id <LZTabBarDelegate> delegate;
@end
@protocol LZTabBarDelegate <NSObject>
- (void)tabBar:(LZTabBar *)tab didSelectItem:(LZTabBarItem *)item atIndex:(NSInteger)index ;
@end
這裡是.h檔案内容, 其屬性比較簡單, 隻設定了delegate和items;
.m的實作如下:
//
// LZTabBar.m
// LZTabBarController
//
// Created by Artron_LQQ on 2016/12/12.
// Copyright © 2016年 Artup. All rights reserved.
//
#import "LZTabBar.h"
#import "LZTabBarItem.h"
@interface LZTabBar ()<LZTabBarItemDelegate>
@property (nonatomic, strong) UIVisualEffectView *effectView;
@property (nonatomic, strong) UIView *topLine;
@end
@implementation LZTabBar
- (instancetype)init {
self = [super init];
if (self) {
self.backgroundColor = [UIColor whiteColor];
}
return self;
}
- (UIView *)topLine {
if (_topLine == nil) {
_topLine = [[UIView alloc]init];
_topLine.backgroundColor = [UIColor grayColor];
[self addSubview:_topLine];
}
return _topLine;
}
- (UIVisualEffectView *)effectView {
if (_effectView == nil) {
UIBlurEffect *effect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
_effectView = [[UIVisualEffectView alloc] initWithEffect:effect];
_effectView.alpha = ;
[self addSubview:_effectView];
}
return _effectView;
}
- (void)layoutSubviews {
[super layoutSubviews];
self.effectView.frame = self.bounds;
[self setupItems];
self.topLine.frame = CGRectMake(, , CGRectGetWidth(self.frame), );
}
- (void)setupItems {
CGFloat width = CGRectGetWidth(self.frame)/self.items.count;
CGFloat height = CGRectGetHeight(self.frame);
for (int i = ; i < self.items.count; i++) {
LZTabBarItem *item = [self.items objectAtIndex:i];
item.frame = CGRectMake(i*width, , width, height);
[self addSubview:item];
item.delegate = self;
}
}
- (void)tabBarItem:(LZTabBarItem *)item didSelectIndex:(NSInteger)index {
if (self.delegate && [self.delegate respondsToSelector:@selector(tabBar:didSelectItem:atIndex:)]) {
[self.delegate tabBar:self didSelectItem:item atIndex:index];
}
}
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
// Drawing code
}
*/
@end
這個類的主要作用是: 布局各個item, 在tabBar的位置, 及tabBar的一些内容.
接下來, 就是定義LZTabBarController了;
2.3 自定義LZTabBarController
這個類的主要作用是: 提供資料源, 繪制底部tabBar, 及關聯viewController;
在提供資料的時候, 我單獨設定了一個類類儲存這些資料, 而沒有直接設定為* LZTabBarController*的屬性:
#pragma mark - LZTabBarConfig
@interface LZTabBarConfig : NSObject
/**
控制器數組, 必須設定
*/
@property (nonatomic, strong) NSArray *viewControllers;
/**
item标題數組, 選擇設定
*/
@property (nonatomic, strong) NSArray *titles;
/**
是否是導航, 預設 YES
*/
@property (nonatomic, assign) BOOL isNavigation;
/**
選中狀态下的圖檔數組
*/
@property (nonatomic, strong) NSArray *selectedImages;
/**
正常狀态下的圖檔數組
*/
@property (nonatomic, strong) NSArray *normalImages;
/**
選中狀态下的标題顔色 預設: red
*/
@property (nonatomic, strong) UIColor *selectedColor;
/**
正常狀态下的标題顔色 預設: gray
*/
@property (nonatomic, strong) UIColor *normalColor;
@end
提供資料源的時候, 隻需要配置這個config即可;
其.m檔案, 隻是設定了一些預設值:
@implementation LZTabBarConfig
- (instancetype)init {
self = [super init];
if (self) {
_isNavigation = YES;
_normalColor = [UIColor grayColor];
_selectedColor = [UIColor redColor];
}
return self;
}
@end
下面, 回到* LZTabBarController*, 其.h的聲明, 就簡潔許多:
#import <UIKit/UIKit.h>
@class LZTabBarConfig;
typedef LZTabBarConfig*(^tabBarBlock)(LZTabBarConfig *config);
@interface LZTabBarController : UITabBarController
/**
是否可用自動旋轉螢幕
*/
@property (nonatomic, assign) BOOL isAutoRotation;
/**
建立tabBarController
@param block 配置建立tabBarController所需的參數
@return 傳回tabBarController執行個體對象
*/
+ (instancetype)createTabBarController:(tabBarBlock)block;
/**
擷取目前的tabBarController執行個體, 執行個體建立後可通過此方法擷取目前執行個體
@return 傳回tabBarController執行個體對象
*/
+ (instancetype)defaultTabBarController;
/**
隐藏底部tabBar的方法
@param isAnimation 是否需要動畫
*/
- (void)hiddenTabBarWithAnimation:(BOOL)isAnimation;
/**
顯示底部tabBar的方法
@param isAnimation 是否需要動畫
*/
- (void)showTabBarWithAnimation:(BOOL)isAnimation;
@end
隻是提供了建立的方法, 及擷取目前執行個體和隐藏/顯示底部tabBar的方法;
.m中的實作:
//
// LZTabBarController.m
// LZTabBarController
//
// Created by Artron_LQQ on 2016/12/12.
// Copyright © 2016年 Artup. All rights reserved.
//
#import "LZTabBarController.h"
#import "LZTabBar.h"
static CGFloat lzTabBarHeight = ;
@interface LZTabBarController ()<LZTabBarDelegate>
@property (nonatomic, strong) LZTabBar *customTabBar;
@property (nonatomic, strong) LZTabBarConfig *config;
@end
@implementation LZTabBarController
- (LZTabBar *)customTabBar {
if (_customTabBar == nil) {
_customTabBar = [[LZTabBar alloc]init];
_customTabBar.delegate = self;
}
return _customTabBar;
}
+ (instancetype)createTabBarController:(tabBarBlock)block {
static dispatch_once_t onceToken;
static LZTabBarController *tabBar;
dispatch_once(&onceToken, ^{
tabBar = [[LZTabBarController alloc]initWithBlock:block];
});
return tabBar;
}
+ (instancetype)defaultTabBarController {
return [LZTabBarController createTabBarController:nil];
}
- (void)hiddenTabBarWithAnimation:(BOOL)isAnimation {
if (isAnimation) {
[UIView animateWithDuration: animations:^{
self.customTabBar.alpha = ;
}];
} else {
self.customTabBar.alpha = ;
}
}
- (void)showTabBarWithAnimation:(BOOL)isAnimation {
if (isAnimation) {
[UIView animateWithDuration: animations:^{
self.customTabBar.alpha = ;
}];
} else {
self.customTabBar.alpha = ;
}
}
- (instancetype)initWithBlock:(tabBarBlock)block {
self = [super init];
if (self) {
LZTabBarConfig *config = [[LZTabBarConfig alloc]init];
NSAssert(block, @"Param in zhe function, can not be nil");
if (block) {
_config = block(config);
}
NSAssert(_config.viewControllers, @"Param 'viewControllers' in the 'config', can not be nil");
[self setupViewControllers];
[self setupTabBar];
_isAutoRotation = YES;
}
return self;
}
- (void)setupViewControllers {
if (_config.isNavigation) {
NSMutableArray *vcs = [NSMutableArray arrayWithCapacity:_config.viewControllers.count];
for (UIViewController *vc in _config.viewControllers) {
if (![vc isKindOfClass:[UINavigationController class]]) {
UINavigationController *nav = [[UINavigationController alloc]initWithRootViewController:vc];
[vcs addObject:nav];
} else {
[vcs addObject:vc];
}
}
self.viewControllers = [vcs copy];
} else {
self.viewControllers = [_config.viewControllers copy];
}
}
- (void)setupTabBar {
NSMutableArray *items = [NSMutableArray array];
for (int i = ; i < _config.viewControllers.count; i++) {
LZTabBarItem *item = [[LZTabBarItem alloc]init];
if (i == ) {
item.icon = _config.selectedImages[i];
if (_config.titles.count > ) {
item.titleColor = _config.selectedColor;
}
} else {
item.icon = _config.normalImages[i];
if (_config.titles.count > ) {
item.titleColor = _config.normalColor;
}
}
if (i < _config.titles.count) {
item.title = _config.titles[i];
}
[items addObject:item];
item.tag = i;
}
// 隐藏掉系統的tabBar
self.tabBar.hidden = YES;
self.customTabBar.items = [items copy];
self.customTabBar.frame = CGRectMake(, CGRectGetHeight(self.view.frame) - lzTabBarHeight, CGRectGetWidth(self.view.frame), lzTabBarHeight);
[self.view addSubview:self.customTabBar];
}
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor whiteColor];
self.selectedIndex = ;
}
#pragma mark - LZTabBarDelegate
- (void)tabBar:(LZTabBar *)tab didSelectItem:(LZTabBarItem *)item atIndex:(NSInteger)index {
NSMutableArray *items = [NSMutableArray arrayWithCapacity:];
for (UIView *view in tab.subviews) {
if ([view isKindOfClass:[LZTabBarItem class]]) {
[items addObject:view];
}
}
for (int i = ; i < items.count; i++) {
UIView *view = items[i];
if ([view isKindOfClass:[LZTabBarItem class]]) {
LZTabBarItem *item = (LZTabBarItem *)view;
item.icon = self.config.normalImages[i];
if (self.config.titles.count > ) {
item.titleColor = _config.normalColor;
}
}
}
item.icon = self.config.selectedImages[index];
if (self.config.titles.count > ) {
item.titleColor = self.config.selectedColor;
}
self.selectedIndex = index;
}
// 螢幕旋轉時調整tabbar
- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator {
[super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];
self.customTabBar.frame = CGRectMake(, size.height - lzTabBarHeight, size.width, lzTabBarHeight);
}
- (BOOL)shouldAutorotate {
return self.isAutoRotation;
}
- (UIInterfaceOrientationMask)supportedInterfaceOrientations {
if (self.isAutoRotation) {
return UIInterfaceOrientationMaskAllButUpsideDown;
} else {
return UIInterfaceOrientationMaskPortrait;
}
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
@end
這裡主要的其實就是, * setupTabBar*方法
和* LZTabBarDelegate*的代理方法tabBar:(LZTabBar )tab didSelectItem:(LZTabBarItem )item atIndex:(NSInteger)index, 需要處理一些狀态的轉換;
到此, 第一種的自定義就結束了, 效果如下:
需要注意的是:
因為我們自定義了tabBar , 是以控制器的屬性hidesBottomBarWhenPushed 就失去效果了, 解決的方法可以是在合适的地方來調用隐藏/顯示的方法;
如果, 還想使用系統的* hidesBottomBarWhenPushed*效果, 可在使用的時候, 調整一下方法:一般, 我們是直接将tabBarController作為window的rootvc, 然後在其子控制器分别加上導航, 我們可以做如下調整:
将tabBar作為UINavigationController的rootvc, 然後把這個導航作為window的rootvc:
// 為了能夠使用hidesBottomBarWhenPushed, 不直接把tabBar設定為window的跟視圖, 而是設定為導航的rootvc, 然後把導航設定為window的跟視圖
// 這樣, 在子控制器上就不用再添加導航了, 即設定: config.isNavigation = NO;
UINavigationController *nav = [[UINavigationController alloc]initWithRootViewController:tab];
// 打開hidesBottomBarWhenPushed
nav.hidesBottomBarWhenPushed = YES;
self.window.rootViewController = nav;
這樣做, 需要注意的是, 其子控制器就不用再添加導航了.
這樣, 就會有上面Gif的效果;
demo位址: LZTabBarController
2.4 繼承自UITabBar
繼承自UITabBar的方式, 與繼承自UIView, 主要的差別是LZTabBar的内容, 其他如LZTabBarItem 和LZTabBarController相關邏輯都是一樣的;
#import <UIKit/UIKit.h>
@class LZTabBarItem;
@protocol LZTabBarDelegate;
@interface LZTabBar : UITabBar
@property (nonatomic, strong)NSArray<LZTabBarItem *> *lzItems;
@property (nonatomic, assign)id <LZTabBarDelegate> lzDelegate;
@end
@protocol LZTabBarDelegate <NSObject>
- (void)tabBar:(LZTabBar *)tab didSelectItem:(LZTabBarItem *)item atIndex:(NSInteger)index ;
@end
.m的實作中, 主要是将系統的item移除掉, 然後添加上自定義的item:
#import "LZTabBar.h"
@interface LZTabBar ()<LZTabBarItemDelegate>
@end
@implementation LZTabBar
- (instancetype)init {
self = [super init];
if (self) {
self.backgroundColor = [UIColor whiteColor];
}
return self;
}
- (void)layoutSubviews {
[super layoutSubviews];
// 移除系統的tabBarItem
Class class = NSClassFromString(@"UITabBarButton");
for (UIView *item in self.subviews) {
if ([item isKindOfClass:class]) {
[item removeFromSuperview];
}
}
// 設定自定義的tabBarItem
[self setupItems];
}
- (void)setupItems {
CGFloat width = CGRectGetWidth(self.frame)/self.items.count;
CGFloat height = CGRectGetHeight(self.frame);
for (int i = ; i < self.lzItems.count; i++) {
LZTabBarItem *item = [self.lzItems objectAtIndex:i];
item.frame = CGRectMake(i*width, , width, height);
[self addSubview:item];
item.delegate = self;
}
}
- (void)tabBarItem:(LZTabBarItem *)item didSelectIndex:(NSInteger)index {
if (self.lzDelegate && [self.lzDelegate respondsToSelector:@selector(tabBar:didSelectItem:atIndex:)]) {
[self.lzDelegate tabBar:self didSelectItem:item atIndex:index];
}
}
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
// Drawing code
}
*/
@end
其最終的效果是一樣的, 隻不過我們可以在執行push操作的時候使用控制器的* hidesBottomBarWhenPushed*屬性來隐藏底部的tabBar;