UITabBar 宽度不随屏幕尺寸增加

Question

我正在另一个UITabBar 中实现UITabBar。我的问题是，无论屏幕大小如何，第二个 TabBar 的宽度都保持不变。这在更大的屏幕上非常突出。我附上截图让你更好地理解。使用蓝色背景表示选择

代码如下：

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;

iPhone6 Plus 截图

Answer 1

感谢您对突出显示按钮的 sn-p。
你想要这样的东西吗？
纵向：

横向：

我的 ViewController 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