I had been using the following code prior to iOS 11 to customize the appearance of the UISearchController
search bar:
var searchController = UISearchController(searchResultsController: nil)
searchController.searchBar.setDefaultSearchBar()
searchController.searchResultsUpdater = self
if #available(iOS 11.0, *) {
navigationItem.searchController = searchController
} else {
tableView.tableHeaderView = searchController.searchBar
}
extension UISearchBar {
func setDefaultSearchBar() {
self.tintColor = UIColor.blue
self.searchBarStyle = .minimal
self.backgroundImage = UIImage(color: UIColor.clear)
let searchBarTextField = self.value(forKey: "searchField") as! UITextField
searchBarTextField.textColor = UIColor.white
searchBarTextField.tintColor = UIColor.blue
searchBarTextField = .dark
}
}
However, the appearance of the search bar fails to update when running the same code on iOS 11.
iOS 10:
iOS 11:
Much of the attention to this question so far has focused on the text color of the search bar. I am looking at more than this - the background color, tint color, the search indicator, clear button color, etc.
I just found out how to set them: (with some help of Brandon and Krunal, thanks!)
The "Cancel" text:
searchController.searchBar.tintColor = .white
The search icon:
searchController.searchBar.setImage(UIImage(named: "my_search_icon"), for: UISearchBarIcon.search, state: .normal)
The clear icon:
searchController.searchBar.setImage(UIImage(named: "my_search_icon"), for: UISearchBarIcon.clear, state: .normal)
The search text:
UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self]).defaultTextAttributes = [NSAttributedStringKey.foregroundColor.rawValue: UIColor.white]
The placeholder:
UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self]).attributedPlaceholder = NSAttributedString(string: "placeholder", attributes: [NSAttributedStringKey.foregroundColor: UIColor.white])
The white background:
if #available(iOS 11.0, *) {
let sc = UISearchController(searchResultsController: nil)
sc.delegate = self
let scb = sc.searchBar
scb.tintColor = UIColor.white
scb.barTintColor = UIColor.white
if let textfield = scb.value(forKey: "searchField") as? UITextField {
textfield.textColor = UIColor.blue
if let backgroundview = textfield.subviews.first {
// Background color
backgroundview.backgroundColor = UIColor.white
// Rounded corner
backgroundview.layer.cornerRadius = 10;
backgroundview.clipsToBounds = true;
}
}
if let navigationbar = self.navigationController?.navigationBar {
navigationbar.barTintColor = UIColor.blue
}
navigationItem.searchController = sc
navigationItem.hidesSearchBarWhenScrolling = false
}
Taken from here .
To properly set the text typed into the search bar to white use (when using a dark field color):
searchController.searchBar.barStyle = .black
To set the textfield background color
if #available(iOS 11.0, *) {
if let textfield = searchController.searchBar.value(forKey: "searchField") as? UITextField {
if let backgroundview = textfield.subviews.first {
// Background color
backgroundview.backgroundColor = UIColor.white
// Rounded corner
backgroundview.layer.cornerRadius = 10;
backgroundview.clipsToBounds = true;
}
}
}
However using something like
textfield.textColor = UIColor.blue
in the above does not seem to work.
将调用setDefaultSearchBar
移动到viewDidAppear
应该可以解决这个问题。
You need to find the UISearchBar
's underlying UITextField
and change its text color.
Notice this only have effect when search controller is going to present ( UISearchControllerDelegate.willPresentSearchController
) or presented.
class ViewController : UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// setup your search controller...
// set search controller's delegate
navigationItem.searchController?.delegate = self
}
}
extension ViewController : UISearchControllerDelegate {
func willPresentSearchController(_ searchController: UISearchController) {
// update text color
searchController.searchBar.textField?.textColor = .white
}
}
extension UISearchBar {
var textField: UITextField? {
for subview in subviews.first?.subviews ?? [] {
if let textField = subview as? UITextField {
return textField
}
}
return nil
}
}
UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self]).defaultTextAttributes = [NSForegroundColorAttributeName: UIColor.white]
Try it: searchController.<YOUR SEARCHBAR>.barStyle = .blackOpaque
instead of self.searchBarStyle = .minimal
.
Thus:
var searchController = UISearchController(searchResultsController: nil)
searchController.searchBar.setDefaultSearchBar()
//Add this line below
searchController.searchBar.barStyle = .blackOpaque
searchController.searchResultsUpdater = self
if #available(iOS 11.0, *) {
navigationItem.searchController = searchController
} else {
tableView.tableHeaderView = searchController.searchBar
}
extension UISearchBar {
func setDefaultSearchBar() {
self.tintColor = UIColor.blue
//Delete this line below
self.searchBarStyle = .minimal
self.backgroundImage = UIImage(color: UIColor.clear)
let searchBarTextField = self.value(forKey: "searchField") as! UITextField
searchBarTextField.textColor = UIColor.white
searchBarTextField.tintColor = UIColor.blue
searchBarTextField = .dark
}
}
如果您需要更改搜索栏中 textField 的背景颜色,请在此处查看我的答案: https ://stackoverflow.com/a/46315974/1109892
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