UITabBar宽度不随屏幕大小而增加

Question

我在另一个UITabBar内执行UITabBar。我的问题是，无论屏幕大小如何，第二个TabBar宽度都保持不变。这在更大的屏幕上突出了很多。我附上截图让你更好地理解。

GRect rect = CGRectMake(0, 0, self.tabBar.frame.size.width/2, self.tabBar.frame.size.height); 
    UIGraphicsBeginImageContext(rect.size); 
    CGContextRef context = UIGraphicsGetCurrentContext(); 
    CGContextSetFillColorWithColor(context, 
            [[UIColor colorWithRed:102.0/255.0 green:197.0/255.0 blue:234.0/255.0 alpha:1.0] CGColor]); 

    CGContextFillRect(context, rect); 
    UIImage *img = UIGraphicsGetImageFromCurrentImageContext(); 
    UIGraphicsEndImageContext(); 
    self.tabBar.selectionIndicatorImage = img; 

从iPhone6加

截图：选择是使用蓝色背景

下面的代码表示

Answer 1

谢谢你的高亮按钮片段。
你想要这样的东西吗？
纵向方向：

横向方向：

我的视图控制器的代码：

#import "ViewController.h" 

@interface ViewController() 
@property (weak, nonatomic) IBOutlet UITabBar *tabBar; 
@property (weak, nonatomic) IBOutlet UITabBar *topTabBar; 

@end 

@implementation ViewController 

- (void)viewDidLoad { 
    [super viewDidLoad]; 
    [[UITabBar appearance] setTintColor:[UIColor redColor]]; 
    [[UITabBarItem appearance] setTitleTextAttributes:@{NSFontAttributeName : [UIFont boldSystemFontOfSize:20]} forState:UIControlStateNormal]; 
} 

- (void)viewDidLayoutSubviews { 

    [self highlightTabBarItems:self.tabBar]; 
    [self highlightTabBarItems:self.topTabBar]; 
} 

- (void)highlightTabBarItems:(UITabBar*)currentTabBar { 

    CGFloat highlightedWidth = self.view.frame.size.width/currentTabBar.items.count; 
    [currentTabBar setItemWidth:highlightedWidth]; 
    CGRect rect = CGRectMake(0, 0, highlightedWidth, currentTabBar.frame.size.height); 
    UIGraphicsBeginImageContext(rect.size); 
    CGContextRef context = UIGraphicsGetCurrentContext(); 
    CGContextSetFillColorWithColor(context, [[UIColor colorWithRed:102.0/255.0 green:197.0/255.0 blue:234.0/255.0 alpha:1.0] CGColor]); 
    CGContextFillRect(context, rect); 
    UIImage *img = UIGraphicsGetImageFromCurrentImageContext(); 
    UIGraphicsEndImageContext(); 
    currentTabBar.selectionIndicatorImage = img; 
} 

@end