ios：仅设置标签栏顶部边框

Question

  

我已将这个波纹管代码应用于tabbar border

self.tabBarController？.tabBar.layer.borderWidth = 0.8 self.tabBarController？。tabBar.layer.borderColor = self.tabBarController？.tabBar.tintColor.cgColor

  

但使用此代码边框适用于所有方面，我只想在标签栏my tabbar that show tabbar border all side (top,left,right,bottom) 的顶部边框   i want tabbar like this sample image that show border only at top side   现在该怎么办？   感谢

Answer 1

//First, remove the default top line and background
UITabBar.appearance().shadowImage = UIImage()
UITabBar.appearance().backgroundImage = UIImage()

//Then, add the custom top line view with custom color. And set the default background color of tabbar     
let lineView = UIView(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 1))
lineView.backgroundColor = UIColor.red
self.tabBarController?.tabBar.addSubview(lineView)
self.tabBarController?.tabBar.backgroundColor = UIColor.init(colorLiteralRed: 248.0/255.0, green: 248.0/255.0, blue: 248.0/255.0, alpha: 1.0)

看起来像这样：