自己写 UISearchBar 发现有一个阴影如下

感谢stackoverflow

链接如下stackoverflow 地址

let searchView = UISearchBar.init(frame: CGRect.init(x: 8, y: 26, width: ScreenWidth - 16 - 44, height: 30))

navigationView.addSubview(searchView)

for subView in searchView.subviews {

for view in subView.subviews {

if view.isKind(of:NSClassFromString("UISearchBarBackground")!) {

let imageView = view as! UIImageView

imageView.removeFromSuperview()

}

}

}

最后解决如下