iOS 自定义UITabBarController的tabBar

             

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;

@end

/**
 *  素材图片的链接: http://pan.baidu.com/s/1geahYRT 密码: axmh
 *  注意图片的尺寸，否则会变形
 */
#import "AppDelegate.h"
#import "FirstViewController.h"
#import "SecondViewController.h"
#import "ThirdViewController.h"
#import "FourthViewController.h"

@interface AppDelegate ()<UITabBarControllerDelegate>
{
    float imgWidth;//tabBarController的宽度
    UITabBarController *_tabBarController;
    NSMutableArray *imageViewArr;
}
@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.window.backgroundColor = [UIColor whiteColor];
    
    //初始化数组
    imageViewArr = [[NSMutableArray alloc] init];
    //初始化控制器
    FirstViewController *firstVC = [[FirstViewController alloc] init];
    SecondViewController *secondVC = [[SecondViewController alloc] init];
    ThirdViewController *thirdVC = [[ThirdViewController alloc] init];
    FourthViewController *fourthVC = [[FourthViewController alloc] init];
    NSArray *array = @[firstVC,secondVC,thirdVC,fourthVC];
    //初始化UITabBarController
    _tabBarController = [[UITabBarController alloc] init];
    //背景图片
    [_tabBarController.tabBar setBackgroundImage:[UIImage imageNamed:@"1.png"]];
    //默认选中第一个
    _tabBarController.selectedIndex = 0;
    //设置代理
    _tabBarController.delegate = self;
    _tabBarController.viewControllers = array;
    imgWidth = [UIScreen mainScreen].bounds.size.width/(array.count*1.0);
    //初始化tabBarController
    [self setupView:CGRectMake(imgWidth*0, 0, imgWidth, 49) image:@"11.png"  selectedImageViewTag: 1000 selectedImage:@"111.png" tabBarItemTitle:@"首页"];
    [self setupView:CGRectMake(imgWidth*1, 0, imgWidth, 49) image:@"12.png"  selectedImageViewTag:1001 selectedImage:@"112.png" tabBarItemTitle:@"导航"];
    [self setupView:CGRectMake(imgWidth*2, 0, imgWidth, 49) image:@"13.png"  selectedImageViewTag:1002 selectedImage:@"113.png" tabBarItemTitle:@"消息"];
    [self setupView:CGRectMake(imgWidth*3, 0, imgWidth, 49) image:@"14.png"  selectedImageViewTag:1003 selectedImage:@"114.png" tabBarItemTitle:@"更多"];
    //设置文字的颜色
    [[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObject:[UIColor orangeColor]  forKey:UITextAttributeTextColor] forState:0];
    //设置选中时文字的颜色
    [[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObject:[UIColor whiteColor]  forKey:UITextAttributeTextColor] forState:UIControlStateSelected];
    
    self.window.rootViewController = _tabBarController;
    [self.window makeKeyAndVisible];
    return YES;
}
/**
 *  初始化tabBarController的tabBar
 *
 *  @param frame             图片的尺寸
 *  @param imageName         底层图片的名字
 *  @param tag               图片的标签
 *  @param selectedImageName 顶层图片的名字
 *  @param title             标题
 */
- (void)setupView:(CGRect)frame image:(NSString *)imageName  selectedImageViewTag:(int)tag selectedImage:(NSString *)selectedImageName tabBarItemTitle:(NSString*)title{
    //底层图片
    UIImageView *imgView = [[UIImageView alloc] initWithFrame:frame];
    imgView.image = [UIImage imageNamed:imageName];
    //顶层图片（不选中时隐藏）
    UIImageView *selectedImageView = [[UIImageView alloc] initWithFrame:frame];
    selectedImageView.tag = tag;
    selectedImageView.image = [UIImage imageNamed:selectedImageName];
    if ((tag-1000) == 0) {
        selectedImageView.hidden = NO;
    }else{
        selectedImageView.hidden = YES;
    }
    [_tabBarController.tabBar addSubview:imgView];
    [_tabBarController.tabBar addSubview:selectedImageView];
    UITabBar *tabBar = _tabBarController.tabBar;
    UITabBarItem *tabBarItem = [tabBar.items objectAtIndex:(tag - 1000)];
    //设置标题
    tabBarItem.title = title;
    //selectedImageView存放到数组
    [imageViewArr addObject:selectedImageView];
}
#pragma mark -- UITabBarControllerDelegate的方法 --
- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController{
    //遍历imageView，选中的就不隐藏，其它的隐藏
    for (UIImageView *imageView in imageViewArr) {
        if (imageView.tag == 1000+tabBarController.selectedIndex) {
            imageView.hidden = NO;
        }else{
            imageView.hidden = YES;
        }
    }
}

@end

#import <UIKit/UIKit.h>

@interface FirstViewController : UIViewController

@end

#import "FirstViewController.h"

@interface FirstViewController ()

@end

@implementation FirstViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor redColor];
}

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

#import <UIKit/UIKit.h>

@interface SecondViewController : UIViewController

@end

#import "SecondViewController.h"

@interface SecondViewController ()

@end

@implementation SecondViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor orangeColor];
}

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

@end

#import <UIKit/UIKit.h>

@interface ThirdViewController : UIViewController

@end

#import "ThirdViewController.h"

@interface ThirdViewController ()

@end

@implementation ThirdViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor yellowColor];
}

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



@end

#import <UIKit/UIKit.h>

@interface FourthViewController : UIViewController

@end

#import "FourthViewController.h"

@interface FourthViewController ()

@end

@implementation FourthViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    self.view.backgroundColor = [UIColor greenColor];

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

@end

@end