一、封装tabBarController
自己封装了一个底航栏控制器，具体实现步骤如下：
点击下载demo
二、自定义UITabBarController
创建一个继承于UITabBarController的文件。
.m文件实现如下：
1、单例实现初始化
+ (instancetype )shareTabar{
if (!tabar) {
static dispatch_once_t predicate;
dispatch_once(&predicate, ^{
tabar = [[self alloc]init];
});
}
return tabar;
}
2、移除交互控件
-(void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
for(UIView *child in self.tabBar.subviews){
if([child isKindOfClass:[UIControl class]]){
[child removeFromSuperview];//移除自带的tabBar
}
}
}
-(BOOL)shouldAutorotate{
return NO;
}
3、解决重影
-(void)viewWillLayoutSubviews{
[super viewWillLayoutSubviews];
for (UIView *child in self.tabBar.subviews) {
if ([child isKindOfClass:NSClassFromString(@"UITabBarButton")]) {
[child removeFromSuperview];
}
}
}
4、初始化ZJTabBar对象
初始化时是把新建的tabBar对象加载在了系统的tabBar上，只是把它给覆盖在了下边，会有重影的可能。
-(void)setupTabBar{
ZJTabBar *customTabBar=[ZJTabBar shareTabBar];
customTabBar.frame=self.tabBar.bounds;
self.customTabBar=customTabBar;
customTabBar.delegate=self;
[self.tabBar addSubview:customTabBar];
}
5、监听按钮的点击
- (void)tabBar:(ZJTabBar *)tabBar didselectedButtonFrom:(int)from to:(int)to{
self.selectedIndex=to;
}
6、添加子视图控制器
-(void)setUPAllChildViewController{
[self.childItemsArray enumerateObjectsUsingBlock:^(NSDictionary *dict, NSUInteger idx, BOOL *stop) {
UIViewController *vc = [NSClassFromString(dict[kClassKey]) new];
vc.title = dict[kTitleKey];
ZJNavigationController *nav = [[ZJNavigationController alloc] initWithRootViewController:vc];
UITabBarItem *item = nav.tabBarItem;
item.title = dict[kTitleKey];
item.image = [UIImage imageNamed:dict[kImgKey]];
item.selectedImage = [[UIImage imageNamed:dict[kSelImgKey]] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
[self addChildViewController:nav];//添加视图控制器
[self.customTabBar addTabBarButtonWithItem:item];
}];
}
三、自定义TabBar
建一个继承于UIView的ZJTabBar文件
.m文件实现如下：
1、单例初始化对象
+ (id)shareTabBar
{
static ZJTabBar *myTabBar = nil;
static dispatch_once_t predicate;
dispatch_once(&predicate, ^{
myTabBar = [[ZJTabBar alloc]init];
});
return myTabBar;
}
2、添加ZJTabBarButton对象
-(void)addTabBarButtonWithItem:(UITabBarItem *)item{
//1、创建按钮
ZJTabBarButton *button=[[ZJTabBarButton alloc]init];
[self addSubview:button];
//添加按钮到数组中
[self.tabBarButtons addObject:button];
//2、设置数据
button.item=item;
//3、监听按钮点击
[button addTarget:self action:@selector(buttonClick:) forControlEvents:UIControlEventTouchDown];
button.tag = self.tabBarButtons.count - 1;
//4、默认选中第零个
if(self.tabBarButtons.count==1){
[self buttonClick:button];
}
}
3、监听按钮点击
-(void)buttonClick:(ZJTabBarButton *)button{
if([self.delegate respondsToSelector:@selector(tabBar:didselectedButtonFrom:to:)]){
[self.delegate tabBar:self didselectedButtonFrom:(int )self.selectedButton.tag to:(int)button.tag];
}
self.selectedButton.selected = NO;
button.selected=YES;
self.selectedButton=button;
}
4、实现layoutSubviews方法，来布局
-(void)layoutSubviews{
[super layoutSubviews];
CGFloat buttonW = self.frame.size.width/self.subviews.count;
CGFloat buttonH = self.frame.size.height;
CGFloat buttonY = 0;
for(int index = 0;index<self.tabBarButtons.count;index++){
ZJTabBarButton *button = self.tabBarButtons[index];
CGFloat buttonX = index*buttonW;
button.frame=CGRectMake(buttonX, buttonY, buttonW, buttonH);
button.tag=index;
}
}
四、自定义TabBarButton
新建继承于UIButton的ZJTabBarButton文件。
在.h文件增加属性
#import <UIKit/UIKit.h>
@interface ZJTabBarButton : UIButton
@property(nonatomic,strong)UITabBarItem *item;
@end
在.m实现设置方法。
1、初始化时设置属性
-(id)initWithFrame:(CGRect)frame{
if(self=[super initWithFrame:frame]){
self.imageView.contentMode = UIViewContentModeCenter;
self.titleLabel.textAlignment = NSTextAlignmentCenter;
self.titleLabel.font = [UIFont systemFontOfSize:14];
[self setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
[self setTitleColor:RGBACOLOR(63, 101, 186, 1.0) forState:UIControlStateSelected];//设置选中颜色
[self setTitleColor:RGBACOLOR(102, 102, 102, 1.0) forState:UIControlStateNormal];
}//选中状态
return self;
}
2、去掉高亮的状态
-(void)setHighlighted:(BOOL)highlighted{}
3、复写两个方法
-(CGRect)imageRectForContentRect:(CGRect)contentRect{
CGFloat imageW=contentRect.size.width;
CGFloat imageH=contentRect.size.height*IWTabBarButtonImageRatio;
return CGRectMake(0, 0, imageW , imageH);
}
//内部文字的frame
-(CGRect)titleRectForContentRect:(CGRect)contentRect{
CGFloat titleY = contentRect.size.height*IWTabBarButtonImageRatio;
CGFloat titleW = contentRect.size.width;
CGFloat titleH = contentRect.size.height-titleY;
return CGRectMake(0, titleY, titleW, titleH);
}
4、设置文字和背景图片，实现属性item的set方法
-(void)setItem:(UITabBarItem *)item{
_item = item;
//设置 文字
[self setTitle:self.item.title forState:UIControlStateNormal];
[self setTitle:self.item.title forState:UIControlStateSelected];
//设置图片
[self setImage:self.item.selectedImage forState:UIControlStateSelected];
[self setImage:self.item.image forState:UIControlStateNormal];
}
五、自定义UINavigationController
1、重写Push方法，当push到二级界面后隐藏底导航栏
-(void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated{
if (self.viewControllers.count > 0) {
viewController.hidesBottomBarWhenPushed=YES;
}
[super pushViewController:viewController animated:YES];
}
2、允许优化返回上一级
系统提供的backbarbuttonitem,不用添加任何代码即可实现向右滑动后退功能,但是往往要对按钮修改样式等时,就需要自定义leftbarbuttonitem,此时向右滑动即失效.通过下面方法即可解决该问题.
主要是通过设置navigationController.interactivePopGestureRecognizer
interactivePopGestureRecognizer属性，这个属性是iOS7以后才有的,自己重新设置interactivePopGestureRecognizer的delegate以让手势继续下去，触发系统的动画action。
self.interactivePopGestureRecognizer.delegate = self;
如果想要右滑的比较顺畅，建议阅读这篇文章:一个丝滑的全屏滑动返回手势。
使用说明：基本使用，把基础类导入到工程中，创建一个继承于ZJTabBarController的类，demo中是MyTabBarController，实现setUPAllChildViewController方法。调回父类是因为在父类中又使用了childItemsArray数组来配置视图控制器。
如下：
-(void)setUPAllChildViewController{
self.childItemsArray = @[
@{kClassKey : @"HomeController",
kTitleKey : @"首页",
kImgKey : @"shouyexuanzhong",
kSelImgKey : @"shouye"},
@{kClassKey : @"ServiceController",
kTitleKey : @"服务",
kImgKey : @"fuwu",
kSelImgKey : @"fuwuxuanzhong"},
@{kClassKey : @"MeController",
kTitleKey : @"我的",
kImgKey : @"wode",
kSelImgKey : @"wodexuanzhong"},
];
[super setUPAllChildViewController];
}
在APPDeledate里设置为根视图
#import "AppDelegate.h"
#import "MyTabBarController.h"
@interface AppDelegate ()
@property(nonatomic,strong)MyTabBarController * zjTabBarController;
@end
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor clearColor];
self.zjTabBarController = [MyTabBarController shareTabar];
self.window.rootViewController = self.zjTabBarController;
[self.window makeKeyAndVisible];
return YES;
}
这个是可以直接拿来用的呦。
demo地址:https://github.com/zhengju/TabBarDemo
