UI一揽子计划 13 （UITabBarController 、UITabBar、UITabBarItem 、Block传值)

一.UITabBarController

.m

#import "RootTabBarViewController.h"

#import "OneViewController.h"
#import "TwoViewController.h"
#import "ThreeViewController.h"
#import "FourViewController.h"
#import "FiveViewController.h"
#import "SixViewController.h"

@interface RootTabBarViewController ()<UITabBarControllerDelegate>

@end

@implementation RootTabBarViewController

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

// 添加控制器

- (void)addViewController
{
    // 创建一个OneViewController 对象
    OneViewController *oneVC = [[OneViewController alloc]init];
    // 添加导航控制器
    UINavigationController *oneNavC = [[UINavigationController alloc]initWithRootViewController:oneVC];
   
    // 添加tabBar 的图片  tabBar  高度为44 最大是30 x 30 的,因为下面还有标题
    oneNavC.tabBarItem.image = [[UIImage imageNamed:@"1"] imageWithRenderingMode:(UIImageRenderingModeAutomatic)];
    /*
     这个方法的使用是图片的
     UIImageRenderingModeAutomatic,          // 默认的
     UIImageRenderingModeAlwaysOriginal,     // 真实图片的颜色
     UIImageRenderingModeAlwaysTemplate,     // 只显示图片的轮廓
     */
    //oneNavC.tabBarItem.selectedImage = [UIImage imageNamed:@"2"];
    oneNavC.tabBarItem.title = @"首页";
    // 添加第二个控制器
    TwoViewController *twoVC = [[TwoViewController alloc]init];
    UINavigationController *twoNavC = [[UINavigationController alloc]initWithRootViewController:twoVC];
    twoNavC.tabBarItem.image = [UIImage imageNamed:@"20-gear2"];
   // twoNavC.tabBarItem.selectedImage = [UIImage imageNamed:@"3"];
    twoNavC.tabBarItem.title = @"设置";
   
    // 添加消息数量  这个属性  是字符串类型的
    twoNavC.tabBarItem.badgeValue = @"99+";
   
   
    ThreeViewController *threeVC = [[ThreeViewController alloc]init];
    UINavigationController *threeNavC = [[UINavigationController alloc]initWithRootViewController:threeVC];
    threeNavC.tabBarItem.image = [UIImage imageNamed:@"75-phone"];
    threeNavC.tabBarItem.title = @"电话";

   
    FourViewController *fourVC =[[FourViewController alloc]init];
    UINavigationController *fourNavC = [[UINavigationController alloc]initWithRootViewController:fourVC];
    fourNavC.tabBarItem.image = [UIImage imageNamed:@"80-shopping-cart"];
    fourNavC.tabBarItem.title = @"购物车";
   
    FiveViewController *fiveVC =[[FiveViewController alloc]init];
    UINavigationController *fiveNavC = [[UINavigationController alloc]initWithRootViewController:fiveVC];
    fiveNavC.tabBarItem.image = [UIImage imageNamed:@"71-compass"];
    fiveNavC.tabBarItem.title = @"地图";
   
    SixViewController *sixVC = [[SixViewController alloc]init];
    UINavigationController *sixNavC =[[UINavigationController alloc]initWithRootViewController:sixVC];
    sixNavC.tabBarItem.image = [UIImage imageNamed:@"106-sliders"];
    sixNavC.tabBarItem.title = @"调节";
   
    // 添加到UITabBarViewController 的数组里  // 被管理
    self.viewControllers = @[oneNavC,twoNavC,threeNavC,fourNavC,fiveNavC];
    // 多少都能显示 但是一般最多只显示五个  其他的都在"More"里面
   
   
    // 默认选中第几个
    self.selectedIndex = 1;
   
    [oneVC release];
    [oneNavC release];
    [twoVC release];
    [twoNavC release];
    [threeVC release];
    [threeNavC release];
    [fourVC release];
    [fourNavC release];
    [fiveVC release];
    [fiveNavC release];
    [sixVC release];
    [sixNavC release];
   
   
   
}

// 封装一下

- (void)addViewControllerClass:(Class)class title:(NSString *)title image:(NSString *)image selectImage:(NSString *)selectImage
{
    // 创建一个UIViewController
    UIViewController *viewVC = [[class alloc] init];
   
    // 创建导航控制器
   
    UINavigationController *navC = [[UINavigationController alloc]initWithRootViewController:viewVC];
   
    // 设置标题 图片 点击图片
   
    navC.tabBarItem.title = title;
    navC.tabBarItem.image = [UIImage imageNamed:image];
    navC.tabBarItem.selectedImage = [UIImage imageNamed:selectImage];
   
    // 添加到数组里面  相当于添加到ViewController里面
    [self addChildViewController:navC];
   
    [viewVC release];
    [navC release];
}


// 使用封装的方法添加控制器
- (void)addChildViewController
{
    [self addViewControllerClass:[OneViewController class] title:@"首页" image:@"1" selectImage:@"1"];
    [self addViewControllerClass:[TwoViewController class] title:@"设置" image:@"20-gear2" selectImage:@"20-gear2"];
    [self addViewControllerClass:[ThreeViewController class] title:@"电话" image:@"75-phone" selectImage:@"75-phone"];
    [self addViewControllerClass:[FourViewController class] title:@"购物车" image:@"80-shopping-cart" selectImage:@"80-shopping-cart"];
    [self addViewControllerClass:[FiveViewController class] title:@"地图" image:@"71-compass" selectImage:@"71-compass"];
    [self addViewControllerClass:[SixViewController class] title:@"调节" image:@"106-sliders" selectImage:@"106-sliders"];
   
   
    // 设置bar 的颜色 和图片
   
    self.tabBar.barTintColor = [UIColor redColor];
    [self.tabBar setBackgroundImage:[UIImage imageNamed:@"tabBar"]];
   
    // 设置代理
    self.delegate = self;
   

}

#pragma mark - tabBarController 代理方法

- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController
{ // 获取点击的 下标做点事 例如刷新界面

    NSLog(@"%ld", tabBarController.selectedIndex);

}

//======================

// 用Block 传值的步骤
/**
 *  1. 定义一个Block 并且 要传的值作为Block的参数
    2. 把起好名的Block 写成属性 用copy声明
    3. 释放Block属性 使用Block_release方法
    4. 在要传值的位置 调用Block
    5. 在要接收传值的位置 实现Block
    6. 注意实现中使用self 时 用 _ _ Block修饰

 */

// 定义一个 无返回值 偶一个字符串参数的Block
typedef void(^WLBlock)(NSString *);

@interface RootViewController : UIViewController

// 定义一个Block属性

@property (nonatomic,copy)WLBlock wlBlock;

@end

- (void)dealloc
{
    Block_release(_wlBlock);    // 属性应该释放掉
    [super dealloc];
}
- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
#pragma mark -- 前情提要
/*
 
 // 属性语义控制copy的内部实现
 - (void)setName:(NSString *)name
 {
 if (_name != name) {
 [_name release];
 _name = [name copy];
 }
 }
 - (NSString *)name
 {
 return _name;
 }
 */
#pragma mark -- 内部实现  没啥大用

- (void)setWlBlock:(WLBlock)wlBlock   // 将栈区的Block 拷贝到了堆区
{
    if (_wlBlock != wlBlock) {
        Block_release(_wlBlock);    // 释放Block
        _wlBlock = Block_copy(wlBlock);   // 拷贝Block
    }

}

- (void)dealloc
{
    Block_release(_jjBlock);
    [super dealloc];
}

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor whiteColor];
   
    UIBarButtonItem *rightButton = [[UIBarButtonItem alloc]initWithTitle:@"传值" style:(UIBarButtonItemStylePlain) target:self action:@selector(rightButton:)];
    self.navigationItem.rightBarButtonItem = rightButton;
    [rightButton release];
   
    TouchView *touchView = [[TouchView alloc]initWithFrame:CGRectMake(100, 100, 100, 100)];
    touchView.backgroundColor = [UIColor redColor];
    [self.view addSubview:touchView];
    [touchView release];
   
       // Block 的实现
    // Block 出现的问题 循环引用的问题
    // 为了解决这个问题 需要用_ _ B l o c k来修饰一下
    // 如果要在Block里面的实现里面使用self的话,就必须用 __Block修饰下
   
   
    // 如果在ARC下面  需要用__Week 来修饰
    __block SecondViewController *mySelf = self;

    touchView.wlBlock = ^void(NSString *str){
        NSLog(@"%@", str);
        [mySelf.navigationController popViewControllerAnimated:YES];
    };
    // Block的主要用途 传值  从后往前传
   
    // Do any additional setup after loading the view.
}

- (void)right:(UIBarButtonItem *)button
{
    SecondViewController *secVC = [[SecondViewController alloc]init];
    [self.navigationController pushViewController:secVC animated:YES];
   
    __block RootViewController *mySelf = self;
    // 实现Block 并且接受参数
    secVC.jjBlock = ^void(NSString *str){
        mySelf.navigationItem.title = str;

    };
    [secVC release];

}

- (void)rightButton:(UIBarButtonItem *)button
{
   
    // 调用 (在要传值的位置调用Block)
    _jjBlock(@"传值");
    [self.navigationController popViewControllerAnimated:YES];

}