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@sunstripe2011(縞 太陽)

【iOS】（tabBarController）UITabBarControllerの学習

Last updated at Posted at 2020-06-25

UITabBarControllerの学習

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POINT 1

UITabBarControllerDelegate の設定

@interface BooksXCOTabBarFirstViewController () <UITabBarControllerDelegate>

POINT 2

UITabBarControllerDelegate の設定

self.tabBarController.delegate = self;

POINT 3

タブバーと同じ動きになるように設定

NSInteger selectedIndex = button.tag;
UIViewController *vc = self.tabBarController.viewControllers[selectedIndex];
[self.tabBarController setSelectedViewController:vc];
self.tabBarController.title = vc.title;

POINT 4

ボタンのタグとタブの位置情報を紐付ける

tabButton.tag = index;

POINT 5

タイトルを選択されたビューのタイトにる切り替える

self.tabBarController.title = viewController.title;

サンプルコード

BooksXCOTabBarMainViewController.m

/// @property (retain,nonatomic) NSArray *viewControllerNameList;

- (IBAction)callTabBarController:(id)sender {
  // タブを要素に持つ tabVCListを初期化
  NSMutableArray *tabVCList = [NSMutableArray new];
  for (NSString *viewControllerName in viewControllerNameList) {
    if (viewControllerName) {
      /// Tabに設定するViewControllerのインスタンスを生成.
      Class class = NSClassFromString(viewControllerName);
      vc = [[class alloc] init];
      [tabVCList addObject:vc];
    }
  }
        
  // UITabControllerの作成する.
  UITabBarController *tbc = [[UITabBarController alloc] init];
        
  // ViewControllerを設定する.
  [tbc setViewControllers:tabVCList];
  tbc.selectedViewController = vc;
  UINavigationController *nv = [[UINavigationController alloc] initWithRootViewController:tbc];
  [self presentViewController:nv animated:YES completion:nil];
}
BooksXCOTabBarFirstViewController.h
#import <UIKit/UIKit.h>

@interface BooksXCOTabBarFirstViewController : UIViewController

@end
BooksXCOTabBarFirstViewController.h
#import "BooksXCOTabBarFirstViewController.h"

/// POINT 1:UITabBarControllerDelegate の設定
@interface BooksXCOTabBarFirstViewController () <UITabBarControllerDelegate>

@end

@implementation BooksXCOTabBarFirstViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    
    // Viewの背景色をCyanに設定する.
    
    self.view.backgroundColor = UIColor.cyanColor;
    
    //tabBarItemのアイコンをFeaturedに、タグを1と定義する.

    self.tabBarItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemFeatured tag:1];
    
    /// POINT 2:UITabBarControllerDelegate の設定
    self.tabBarController.delegate = self;

    // Controllerのタイトルを設定する.
    self.title = @"My 1st View";
    self.tabBarController.title = self.title;
    
    // Viewの背景色をCyanに設定する.
    self.view.backgroundColor = UIColor.cyanColor;
}

- (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.
}
*/

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    // 表示前に設定
    [self setupTapTabButtons];
}

/*
 ボタンイベント
 */

- (IBAction)onClickTabButton:(id)sender {
    UIButton *button = sender;
    /// POINT 3:タブバーと同じ動きになるように設定
    NSInteger selectedIndex = button.tag;
    UIViewController *vc = self.tabBarController.viewControllers[selectedIndex];
    [self.tabBarController setSelectedViewController:vc];
    self.tabBarController.title = vc.title;
}

- (void)setupTapTabButtons {
    CGFloat TAB_BUTTON_WIDHT      = 150;
    CGFloat TAB_BUTTON_HEIGHT     = 50;
    CGFloat TAB_BUTTON_POSITION_Y = 300;
    
    NSInteger index = 0;
    NSInteger max = self.tabBarController.viewControllers.count;
    for (UIViewController *vc in self.tabBarController.viewControllers) {
        
        CGPoint point = CGPointMake((self.view.frame.size.width / max) * index + ((self.view.frame.size.width/ max)  - TAB_BUTTON_WIDHT )/ 2, TAB_BUTTON_POSITION_Y);
        // ボタンの定義をおこなう.
        UIButton *tabButton = [[UIButton alloc] initWithFrame:CGRectMake(point.x,point.y,TAB_BUTTON_WIDHT,TAB_BUTTON_HEIGHT)];
        
        /// POINT 4:ボタンのタグとタブの位置情報を紐付ける
        tabButton.tag = index;
        
        tabButton.backgroundColor = UIColor.orangeColor;
        
        tabButton.layer.masksToBounds = true;
        
        [tabButton setTitle:vc.title forState:UIControlStateNormal];
        
        tabButton.layer.cornerRadius = 20.0;
        
        [tabButton addTarget:self action:@selector(onClickTabButton:) forControlEvents:UIControlEventTouchUpInside];
        
        // ボタンをViewに追加する.
        [self.view addSubview:tabButton];
        index++;
    }
}

- (BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController {
    return YES;
}

- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController {
    /// POINT 5:タイトルを選択されたビューのタイトにる切り替える
    self.tabBarController.title = viewController.title;
}

- (void)tabBarController:(UITabBarController *)tabBarController willBeginCustomizingViewControllers:(NSArray<__kindof UIViewController *> *)viewControllers {
    
}

- (void)tabBarController:(UITabBarController *)tabBarController willEndCustomizingViewControllers:(NSArray<__kindof UIViewController *> *)viewControllers changed:(BOOL)changed {
    
}

- (void)tabBarController:(UITabBarController *)tabBarController didEndCustomizingViewControllers:(NSArray<__kindof UIViewController *> *)viewControllers changed:(BOOL)changed {
    
}

- (UIInterfaceOrientationMask)tabBarControllerSupportedInterfaceOrientations:(UITabBarController *)tabBarController {
    return UIInterfaceOrientationMaskLandscape;
}

- (UIInterfaceOrientation)tabBarControllerPreferredInterfaceOrientationForPresentation:(UITabBarController *)tabBarController {
    return UIInterfaceOrientationPortrait;
}

//- (nullable id <UIViewControllerInteractiveTransitioning>)tabBarController:(UITabBarController *)tabBarController
//                               interactionControllerForAnimationController: (id <UIViewControllerAnimatedTransitioning>)animationController {
//    
//}

//- (nullable id <UIViewControllerAnimatedTransitioning>)tabBarController:(UITabBarController *)tabBarController
//                     animationControllerForTransitionFromViewController:(UIViewController *)fromVC
//                                                       toViewController:(UIViewController *)toVC {
//    
//}

@end
BooksXCOTabBarSecondViewController.h
#import <UIKit/UIKit.h>

@interface BooksXCOTabBarSecondViewController : UIViewController

@end
BooksXCOTabBarSecondViewController.h
#import "BooksXCOTabBarSecondViewController.h"

@interface BooksXCOTabBarSecondViewController () <UITabBarControllerDelegate>

@end

@implementation BooksXCOTabBarSecondViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    // Viewの背景色をGreenに設定する.
    
    self.view.backgroundColor = UIColor.greenColor;
    
    // tabBarItemのアイコンをFeaturedに、タグを2と定義する.
    
    self.tabBarItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemFeatured tag:2];
    
    self.tabBarController.delegate = self;
    
    self.title = @"My 2nd View";
    
    // Viewの背景色を定義する.
    self.view.backgroundColor = UIColor.blueColor;
    
    // ボタンの定義をおこなう.
    UIButton *closeButton = [[UIButton alloc] initWithFrame:CGRectMake(0,0,100,50)];
    
    closeButton.backgroundColor = [UIColor.yellowColor colorWithAlphaComponent:0.8];
    
    closeButton.layer.masksToBounds = true;
    
    [closeButton setTitleColor:UIColor.redColor forState:UIControlStateNormal];
    
    closeButton.titleLabel.font = [UIFont systemFontOfSize:20];
    
    [closeButton setTitle:@"CLOSE" forState:UIControlStateNormal];
    
    closeButton.layer.cornerRadius = 20.0;
    
    closeButton.layer.position = CGPointMake(self.view.bounds.size.width/2,200);
    
    closeButton.layer.borderColor = UIColor.redColor.CGColor;
    
    closeButton.layer.borderWidth = 2.0;
    
    [closeButton addTarget:self action:@selector(onClickCloseButton:) forControlEvents:UIControlEventTouchUpInside];
    
    // ボタンをViewに追加する.
    [self.view addSubview:closeButton];
}

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

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    // 表示前に設定
    [self setupTapTabButtons];
}

/*
#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.
}
*/

- (void)onClickCloseButton:(id)sender {
    [self dismissViewControllerAnimated:YES completion:nil];
}

/*
 ボタンイベント
 */

- (IBAction)onClickTabButton:(id)sender {
    UIButton *button = sender;
    NSInteger selectedIndex = button.tag;
    UIViewController *vc = self.tabBarController.viewControllers[selectedIndex];
    [self.tabBarController setSelectedViewController:vc];
    self.tabBarController.title = vc.title;
}

- (void)setupTapTabButtons {
    CGFloat TAB_BUTTON_WIDHT      = 150;
    CGFloat TAB_BUTTON_HEIGHT     = 50;
    CGFloat TAB_BUTTON_POSITION_Y = 300;
    
    NSInteger index = 0;
    NSInteger max = self.tabBarController.viewControllers.count;
    for (UIViewController *vc in self.tabBarController.viewControllers) {
        
        CGPoint point = CGPointMake((self.view.frame.size.width / max) * index + ((self.view.frame.size.width/ max)  - TAB_BUTTON_WIDHT )/ 2, TAB_BUTTON_POSITION_Y);
        // ボタンの定義をおこなう.
        UIButton *tabButton = [[UIButton alloc] initWithFrame:CGRectMake(point.x,point.y,TAB_BUTTON_WIDHT,TAB_BUTTON_HEIGHT)];
        
        tabButton.tag = index;
        
        tabButton.backgroundColor = UIColor.orangeColor;
        
        tabButton.layer.masksToBounds = true;
        
        [tabButton setTitle:vc.title forState:UIControlStateNormal];
        
        tabButton.layer.cornerRadius = 20.0;
        
        [tabButton addTarget:self action:@selector(onClickTabButton:) forControlEvents:UIControlEventTouchUpInside];
        
        // ボタンをViewに追加する.
        [self.view addSubview:tabButton];
        index++;
    }
}

- (BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController {
    return YES;
}

- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController {
    self.tabBarController.title = viewController.title;
}

- (void)tabBarController:(UITabBarController *)tabBarController willBeginCustomizingViewControllers:(NSArray<__kindof UIViewController *> *)viewControllers {
    
}

- (void)tabBarController:(UITabBarController *)tabBarController willEndCustomizingViewControllers:(NSArray<__kindof UIViewController *> *)viewControllers changed:(BOOL)changed {
    
}

- (void)tabBarController:(UITabBarController *)tabBarController didEndCustomizingViewControllers:(NSArray<__kindof UIViewController *> *)viewControllers changed:(BOOL)changed {
    
}

- (UIInterfaceOrientationMask)tabBarControllerSupportedInterfaceOrientations:(UITabBarController *)tabBarController {
    return UIInterfaceOrientationMaskLandscape;
}

- (UIInterfaceOrientation)tabBarControllerPreferredInterfaceOrientationForPresentation:(UITabBarController *)tabBarController {
    return UIInterfaceOrientationPortrait;
}

//- (nullable id <UIViewControllerInteractiveTransitioning>)tabBarController:(UITabBarController *)tabBarController
//                               interactionControllerForAnimationController: (id <UIViewControllerAnimatedTransitioning>)animationController {
//
//}

//- (nullable id <UIViewControllerAnimatedTransitioning>)tabBarController:(UITabBarController *)tabBarController
//                     animationControllerForTransitionFromViewController:(UIViewController *)fromVC
//                                                       toViewController:(UIViewController *)toVC {
//
//}

@end

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