[bug]:如果把第一个tabbarItem设置成plusButton,其他的tabbarItem会不显示title

[liu521227]

我的修复方案如下，不知道会不会引起其他的坑：

for (UIViewController *viewController in _viewControllers) {
            NSString *title = nil;
            id normalImageInfo = nil;
            id selectedImageInfo = nil;
            UIOffset titlePositionAdjustment = UIOffsetZero;
            UIEdgeInsets imageInsets = UIEdgeInsetsZero;
            NSURL *lottieURL = nil;
            NSValue *lottieSizeValue = nil;
            if (viewController != CYLPlusChildViewController) {
                title = _tabBarItemsAttributes[idx][CYLTabBarItemTitle];
                normalImageInfo = _tabBarItemsAttributes[idx][CYLTabBarItemImage];
                selectedImageInfo = _tabBarItemsAttributes[idx][CYLTabBarItemSelectedImage];
                lottieURL = _tabBarItemsAttributes[idx][CYLTabBarLottieURL];
                lottieSizeValue = _tabBarItemsAttributes[idx][CYLTabBarLottieSize];

                NSValue *offsetValue = _tabBarItemsAttributes[idx][CYLTabBarItemTitlePositionAdjustment];
                UIOffset offset = [offsetValue UIOffsetValue];
                titlePositionAdjustment = offset;

                NSValue *insetsValue = _tabBarItemsAttributes[idx][CYLTabBarItemImageInsets];
                UIEdgeInsets insets = [insetsValue UIEdgeInsetsValue];
                imageInsets = insets;
            } else {
                idx--;
                //**如果是CYLPlusChildViewController ，title设置为空字符串，解决把第一个tabbarItem设置成plusButton,其他的 
                   tabbarItem会不显示title问题**
                title = @"";
            }

[ChenYilong]

新版本v1.29.1中已修复 

变更记录见: https://github.com/ChenYilong/CYLTabBarController/commit/062ad52c9cb0cee9fabbb9de6c3a0ad893713d86