如何获取分隔符b / w UITabBarItems？

Question

我想在UItabBarItems中使用分隔符，如下图所示。

如何在标签项下添加小分隔线？

Answer 1

只有添加标签项的背景才有可能。您可以添加图像或子视图来制作背景。 您可以以编程方式为UITabBar创建背景：

#define SEPARATOR_WIDTH 0.4f
#define SEPARATOR_COLOR [UIColor whiteColor]

- (void) setupTabBarSeparators {
    CGFloat itemWidth = floor(self.tabBar.frame.size.width/self.tabBar.items.count);

    UIView *bgView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.tabBar.frame.size.width, self.tabBar.frame.size.height)];
    for (int i=0; i<self.tabBar.items.count - 1; i++) {
        UIView *separator = [[UIView alloc] initWithFrame:CGRectMake(itemWidth * (i +1) - SEPARATOR_WIDTH/2, 0, SEPARATOR_WIDTH, self.tabBar.frame.size.height)];
        [separator setBackgroundColor:SEPARATOR_COLOR];
        [bgView addSubview:separator];
    }

    UIGraphicsBeginImageContext(bgView.bounds.size);
    [bgView.layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *tabBarBackground = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    [[UITabBar appearance] setBackgroundImage:tabBarBackground];
}