选项卡栏控制器中的图像和标题是否重叠?

• 发现与动画相关的问题。
• 我能解决这个问题。
• 通过使用CustomTabBarClass对Interface builder中的UITabBar进行子分类

-班级CustomTabBarClass.swift

class CustomTabBarClass: UITabBar {

var oldSafeAreaInsets = UIEdgeInsets.zero

@available(iOS 11.0, *)
override func safeAreaInsetsDidChange() {
    super.safeAreaInsetsDidChange()

    if oldSafeAreaInsets != safeAreaInsets {
        oldSafeAreaInsets = safeAreaInsets

        invalidateIntrinsicContentSize()
        superview?.setNeedsLayout()
        superview?.layoutSubviews()
    }
}

override func sizeThatFits(_ size: CGSize) -> CGSize {
    var size = super.sizeThatFits(size)
    if #available(iOS 11.0, *) {
        let bottomInset = safeAreaInsets.bottom
        if bottomInset > 0 && size.height < 50 && (size.height + bottomInset < 90) {
            size.height += bottomInset
        }
    }
    return size
}

override var frame: CGRect {
    get {
        return super.frame
    }
    set {
        var tmp = newValue
        if let superview = superview, tmp.maxY != 
        superview.frame.height {
            tmp.origin.y = superview.frame.height - tmp.height
        }

        super.frame = tmp
        }
    }
}

-CustomTabBarClass.m

@implementation CustomTabBarClass{
    UIEdgeInsets oldSafeAreaInsets;
}


- (void)awakeFromNib {
    [super awakeFromNib];

    oldSafeAreaInsets = UIEdgeInsetsZero;
}


- (void)safeAreaInsetsDidChange {
    [super safeAreaInsetsDidChange];

    if (!UIEdgeInsetsEqualToEdgeInsets(oldSafeAreaInsets, self.safeAreaInsets)) {
        [self invalidateIntrinsicContentSize];

        if (self.superview) {
            [self.superview setNeedsLayout];
            [self.superview layoutSubviews];
        }
    }
}

- (CGSize)sizeThatFits:(CGSize)size {
    size = [super sizeThatFits:size];

    if (@available(iOS 11.0, *)) {
        float bottomInset = self.safeAreaInsets.bottom;
        if (bottomInset > 0 && size.height < 50 && (size.height + bottomInset < 90)) {
            size.height += bottomInset;
        }
    }

    return size;
}


- (void)setFrame:(CGRect)frame {
    if (self.superview) {
        if (frame.origin.y + frame.size.height != self.superview.frame.size.height) {
            frame.origin.y = self.superview.frame.size.height - frame.size.height;
        }
    }
    [super setFrame:frame];
}


@end

我不认为这是一个完美的答案,但下面的代码解决了我的问题。

1. 为tabbarcontroller创建子类

2. 添加代码 视图加载

   宽度=tabBar.bounds.width标签

   if UIDevice().userInterfaceIdiom == .phone {
       switch UIScreen.main.nativeBounds.height {
   
       case 2436:
           let tabSize = CGSize(width: width/5, height: 83)
           UIGraphicsBeginImageContext(tabSize)
           selectionImage?.draw(in: CGRect(x: 0, y: 0, width: tabSize.width, height: tabSize.height))
           selectionImage = UIGraphicsGetImageFromCurrentImageContext()
           UIGraphicsEndImageContext()
   
   
       default:
           let tabSize = CGSize(width: width/5, height: 49)
           UIGraphicsBeginImageContext(tabSize)
           selectionImage?.draw(in: CGRect(x: 0, y: 0, width: tabSize.width, height: tabSize.height))
           selectionImage = UIGraphicsGetImageFromCurrentImageContext()
           UIGraphicsEndImageContext()
   
   
       }
   }