tabBarViewController

NS_ASSUME_NONNULL_BEGIN

@class UIView, UIImage, UINavigationController, UITabBarItem;
@protocol UITabBarControllerDelegate;

NS_CLASS_AVAILABLE_IOS(2_0) @interface UITabBarController : UIViewController <UITabBarDelegate, NSCoding>

@property(nullable, nonatomic,copy) NSArray<__kindof UIViewController *> *viewControllers;
// If the number of view controllers is greater than the number displayable by a tab bar, a "More" navigation controller will automatically be shown.
// The "More" navigation controller will not be returned by -viewControllers, but it may be returned by -selectedViewController.
- (void)setViewControllers:(NSArray<__kindof UIViewController *> * __nullable)viewControllers animated:(BOOL)animated;

@property(nullable, nonatomic, assign) __kindof UIViewController *selectedViewController; // This may return the "More" navigation controller if it exists.
@property(nonatomic) NSUInteger selectedIndex;

@property(nonatomic, readonly) UINavigationController *moreNavigationController __TVOS_PROHIBITED; // Returns the "More" navigation controller, creating it if it does not already exist.
@property(nullable, nonatomic, copy) NSArray<__kindof UIViewController *> *customizableViewControllers __TVOS_PROHIBITED; // If non-nil, then the "More" view will include an "Edit" button that displays customization UI for the specified controllers. By default, all view controllers are customizable.

@property(nonatomic,readonly) UITabBar *tabBar NS_AVAILABLE_IOS(3_0); // Provided for -[UIActionSheet showFromTabBar:]. Attempting to modify the contents of the tab bar directly will throw an exception.

@property(nullable, nonatomic,weak) id<UITabBarControllerDelegate> delegate;

@end

@protocol UITabBarControllerDelegate <NSObject>
@optional
- (BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController NS_AVAILABLE_IOS(3_0);
- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController;

- (void)tabBarController:(UITabBarController *)tabBarController willBeginCustomizingViewControllers:(NSArray<__kindof UIViewController *> *)viewControllers NS_AVAILABLE_IOS(3_0) __TVOS_PROHIBITED;
- (void)tabBarController:(UITabBarController *)tabBarController willEndCustomizingViewControllers:(NSArray<__kindof UIViewController *> *)viewControllers changed:(BOOL)changed NS_AVAILABLE_IOS(3_0) __TVOS_PROHIBITED;
- (void)tabBarController:(UITabBarController *)tabBarController didEndCustomizingViewControllers:(NSArray<__kindof UIViewController *> *)viewControllers changed:(BOOL)changed __TVOS_PROHIBITED;

- (UIInterfaceOrientationMask)tabBarControllerSupportedInterfaceOrientations:(UITabBarController *)tabBarController NS_AVAILABLE_IOS(7_0) __TVOS_PROHIBITED;
- (UIInterfaceOrientation)tabBarControllerPreferredInterfaceOrientationForPresentation:(UITabBarController *)tabBarController NS_AVAILABLE_IOS(7_0) __TVOS_PROHIBITED;

- (nullable id <UIViewControllerInteractiveTransitioning>)tabBarController:(UITabBarController *)tabBarController
                      interactionControllerForAnimationController: (id <UIViewControllerAnimatedTransitioning>)animationController NS_AVAILABLE_IOS(7_0);

- (nullable id <UIViewControllerAnimatedTransitioning>)tabBarController:(UITabBarController *)tabBarController
            animationControllerForTransitionFromViewController:(UIViewController *)fromVC
                                              toViewController:(UIViewController *)toVC  NS_AVAILABLE_IOS(7_0);

@end

@interface UIViewController (UITabBarControllerItem)

@property(null_resettable, nonatomic, strong) UITabBarItem *tabBarItem; // Automatically created lazily with the view controller‘s title if it‘s not set explicitly.

@property(nullable, nonatomic, readonly, strong) UITabBarController *tabBarController; // If the view controller has a tab bar controller as its ancestor, return it. Returns nil otherwise.

@end

NS_ASSUME_NONNULL_END

- (void)viewDidLoad {
    [super viewDidLoad];
    self.tabBar.backgroundColor = [UIColor grayColor];
    
    //床架控制器
    self.V1 = [[ViewController alloc] init];
    //将控制器放入导航控制器中
    UINavigationController *navc= [[UINavigationController alloc] initWithRootViewController:self.V1];
    //设置tabBarItem的标题
    navc.tabBarItem.title = @"成长";
    //设置tabBarItem的标题图片
    navc.tabBarItem.image = [UIImage imageNamed:[NSString stringWithFormat:@"tab_growth"]];
    
//    navc.tabBarItem.image =  [self YZImageWithColor:[UIColor whiteColor] andSize:CGSizeMake(CGRectGetWidth(self.tabBar.bounds)/4, CGRectGetHeight(self.tabBar.bounds))];
    
    //设置tabBarItem标题点击之前的颜色
    [navc.tabBarItem setTitleTextAttributes:@{NSForegroundColorAttributeName: [UIColor whiteColor],NSFontAttributeName:[UIFont boldSystemFontOfSize:10]} forState:UIControlStateNormal];
    //设置tabBarItem标题点击之后的颜色
    [navc.tabBarItem setTitleTextAttributes:@{NSForegroundColorAttributeName: [UIColor redColor],NSFontAttributeName:[UIFont boldSystemFontOfSize:10]} forState:UIControlStateSelected];
    
    self.V3 = [[TwoViewController alloc] init];
    UINavigationController *navc1= [[UINavigationController alloc] initWithRootViewController:self.V3];
    navc1.navigationBar.barTintColor = [UIColor blueColor];
    navc1.tabBarItem.title = @"我";
    navc1.tabBarItem.image = [UIImage imageNamed:[NSString stringWithFormat:@"tab_mine"]];
    
//    navc1.tabBarItem.image =  [self YZImageWithColor:[UIColor whiteColor] andSize:CGSizeMake(CGRectGetWidth(self.tabBar.bounds)/4, CGRectGetHeight(self.tabBar.bounds))];
    
    [navc1.tabBarItem setTitleTextAttributes:@{NSForegroundColorAttributeName: [UIColor whiteColor],NSFontAttributeName:[UIFont boldSystemFontOfSize:10]} forState:UIControlStateNormal];
    [navc1.tabBarItem setTitleTextAttributes:@{NSForegroundColorAttributeName: [UIColor redColor],NSFontAttributeName:[UIFont boldSystemFontOfSize:10]} forState:UIControlStateSelected];
    //将控制器放入数组中
    NSArray * array = [NSArray arrayWithObjects:navc, navc1, nil];
    //将控制器
    [self setViewControllers:array animated:YES];
    //调用函数设置tabBar背景颜色
    self.tabBar.barTintColor = [UIColor purpleColor];
    //调用函数设置tabBar对应的每一个控制器点击之后的图标
    self.tabBar.selectionIndicatorImage = [self YZImageWithColor:[UIColor orangeColor] andSize:CGSizeMake(CGRectGetWidth(self.tabBar.bounds)/4, CGRectGetHeight(self.tabBar.bounds))];
    //重写UITabBarController代理
    self.delegate = self;
}

//设置图片的颜色和大小

- (UIImage *)YZImageWithColor:(UIColor *)color andSize:(CGSize)size{

    CGRect rect = CGRectMake(0.0f, 0.0f, size.width, size.height);

    UIGraphicsBeginImageContext(rect.size);

    CGContextRef context = UIGraphicsGetCurrentContext();

    CGContextSetFillColorWithColor(context, [color CGColor]);

    CGContextFillRect(context, rect);

    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return image;

}

//点击tabBarController之后调用的时间
- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController
{

    UITabBarItem *tabBarItem = [[self.viewControllers objectAtIndex:0] tabBarItem];
    if(tabBarController.selectedIndex == 0){
        if ([tabBarItem.title isEqualToString:@"相机"]) {
            //调用相机相册
            [self yzxShowCamera];
        }
        tabBarItem.image = [UIImage imageNamed:[NSString stringWithFormat:@"tab_ camera"]];
        tabBarItem.title = @"相机";
        
    }else{
        tabBarItem.title = @"成长";
        tabBarItem.image = [UIImage imageNamed:[NSString stringWithFormat:@"tab_growth"]];
    }
}