记录iOS 13以上如何做tabbar的适配

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适配自定义的UITabBarController,tabbar的字体颜色和选中时的背景以及字体颜色适配

1. 字体消失的问题比较普遍,网上一搜就能找到
2. 选中会默认带背景色这个,只发现在iPhone X机型上有

    UIColor *normalColor = [UIColor blackColor];
    UIColor *selectColor = [UIColor orangeColor];
    UIFont *font = [UIFont fontWithName:@"PingFang SC" size:10];
    NSDictionary *normalAttributes = @{
        NSForegroundColorAttributeName : normalColor,
        NSFontAttributeName : font
    };
    NSDictionary *selectedAttributes = @{
        NSForegroundColorAttributeName : selectColor,
        NSFontAttributeName : font
    };
    
    if (@available(iOS 13.0, *)) {
        //iOS 13不设置tintColor 字体颜色会消失
         self.tabBar.tintColor = selectColor;
        [self.tabBar setUnselectedItemTintColor:normalColor];
    }else{
        [[UITabBarItem appearance] setTitleTextAttributes:normalAttributes forState:UIControlStateNormal];
        [[UITabBarItem appearance] setTitleTextAttributes:selectedAttributes forState:UIControlStateSelected];
    }
    UIImage *barImg = [UIImage imageFromWithColor:[UIColor whiteColor]];
    UIImage *lineImg = [UIImage imageFromWithColor:RGBA(228,228,228,1)];
    // 这个不设置在iPhone X上会有默认的选中背景颜色 因为背景是白的 所以搞个白的图片
    self.tabBar.selectionIndicatorImage = barImg;
    self.tabBar.backgroundImage = barImg;
    self.tabBar.shadowImage = lineImg;