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 | func removeSearchBarBgView(frome view: UIView) {for sv in view.subviews {
 
 if let className = NSClassFromString("UISearchBarBackground") {
 if sv.isKind(of: className) {
 sv.removeFromSuperview()
 continue
 }
 }
 
 if let t = sv as? UITextField {
 t.enablesReturnKeyAutomatically = false
 }
 removeSearchBarBgView(frome: sv)
 }
 }
 searchBar = UISearchBar()
 searchBar.placeholder = "搜索"
 searchBar.backgroundColor = UIColor.clear
 searchBar.delegate = self
 searchBar.tintColor = UIColor.paOrange
 removeSearchBarBgView(frome: searchBar)
 
 |