custom search bar using UISearchController in iOS 8 - objective-c

Question

I have a custom search bar class, and I used interface builder to insert a search bar as an instance of this custom class. How do I use this search bar is search bar for the UISearchController? Its searchBar property is read-only so I can't assign my search bar to it.

Answer 1

You have to set your already initialized custom search bar to be returned in the overriden search bar getter for you custom UISearchController class and setup its properties after the searchcontroller init, this way all the UISearchController functionality are retained:
public class DSearchController: UISearchController {
private var customSearchBar = DSearchBar()
override public var searchBar: UISearchBar {
get {
return customSearchBar
}
}
required public init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
override init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: NSBundle?) {
super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)
}
public init(searchResultsController: UIViewController?,
searchResultsUpdater: UISearchResultsUpdating?,
delegate: UISearchControllerDelegate?,
dimsBackgroundDuringPresentation: Bool,
hidesNavigationBarDuringPresentation: Bool,
searchBarDelegate: UISearchBarDelegate?,
searchBarFrame: CGRect?,
searchBarStyle: UISearchBarStyle,
searchBarPlaceHolder: String,
searchBarFont: UIFont?,
searchBarTextColor: UIColor?,
searchBarBarTintColor: UIColor?, // Bar background
searchBarTintColor: UIColor) { // Cursor and bottom line
super.init(searchResultsController: searchResultsController)
self.searchResultsUpdater = searchResultsUpdater
self.delegate = delegate
self.dimsBackgroundDuringPresentation = dimsBackgroundDuringPresentation
self.hidesNavigationBarDuringPresentation = hidesNavigationBarDuringPresentation
customSearchBar.setUp(searchBarDelegate,
frame: searchBarFrame,
barStyle: searchBarStyle,
placeholder: searchBarPlaceHolder,
font: searchBarFont,
textColor: searchBarTextColor,
barTintColor: searchBarBarTintColor,
tintColor: searchBarTintColor)
}
}
And this is my custom searchBar:
public class DSearchBar: UISearchBar {
var preferredFont: UIFont?
var preferredTextColor: UIColor?
init(){
super.init(frame: CGRect.zero)
}
func setUp(delegate: UISearchBarDelegate?,
frame: CGRect?,
barStyle: UISearchBarStyle,
placeholder: String,
font: UIFont?,
textColor: UIColor?,
barTintColor: UIColor?,
tintColor: UIColor?) {
self.delegate = delegate
self.frame = frame ?? self.frame
self.searchBarStyle = searchBarStyle
self.placeholder = placeholder
self.preferredFont = font
self.preferredTextColor = textColor
self.barTintColor = barTintColor ?? self.barTintColor
self.tintColor = tintColor ?? self.tintColor
self.bottomLineColor = tintColor ?? UIColor.clearColor()
sizeToFit()
// translucent = false
// showsBookmarkButton = false
// showsCancelButton = true
// setShowsCancelButton(false, animated: false)
// customSearchBar.backgroundImage = UIImage()
}
required public init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
let bottomLine = CAShapeLayer()
var bottomLineColor = UIColor.clearColor()
override public func layoutSubviews() {
super.layoutSubviews()
for view in subviews {
if let searchField = view as? UITextField { setSearchFieldAppearance(searchField); break }
else {
for sView in view.subviews {
if let searchField = sView as? UITextField { setSearchFieldAppearance(searchField); break }
}
}
}
bottomLine.path = UIBezierPath(rect: CGRectMake(0.0, frame.size.height - 1, frame.size.width, 1.0)).CGPath
bottomLine.fillColor = bottomLineColor.CGColor
layer.addSublayer(bottomLine)
}
func setSearchFieldAppearance(searchField: UITextField) {
searchField.frame = CGRectMake(5.0, 5.0, frame.size.width - 10.0, frame.size.height - 10.0)
searchField.font = preferredFont ?? searchField.font
searchField.textColor = preferredTextColor ?? searchField.textColor
//searchField.backgroundColor = UIColor.clearColor()
//backgroundImage = UIImage()
}
}
Init example:
searchController = DSearchController(searchResultsController: ls,
searchResultsUpdater: self,
delegate: self,
dimsBackgroundDuringPresentation: true,
hidesNavigationBarDuringPresentation: true,
searchBarDelegate: ls,
searchBarFrame: CGRectMake(0.0, 0.0, SCREEN_WIDTH, 44.0),
searchBarStyle: .Minimal,
searchBarPlaceHolder: NSLocalizedString("Search a location...", comment: ""),
searchBarFont: nil,
searchBarTextColor: nil,
searchBarBarTintColor: UIColor.whiteColor(),
searchBarTintColor: iconsColor)
searchController.searchBar.keyboardAppearance = .Dark
definesPresentationContext = true
tableView.tableHeaderView = searchController.searchBar