UINavigationBar : Add SearchBar as TitleView - ios

Question

I want to add uisearchbar in place of title of controller.
I am facing 2 problems currently.
1)
I do not know from where this gray background is coming. Please check this picture.
2) I need this searchbar in other inner screens also. But when I push another controller this searchbar is removed.
Here is my code :
// Seachbar Container View
let searchBarContainer = ERView(frame: CGRectMake(0,0,280,44))
searchBarContainer.autoresizingMask = [.FlexibleWidth]
searchBarContainer.backgroundColor = UIColor.clearColor()
// Search Bar
let searchBar = ERSearchBar(frame: searchBarContainer.bounds)
searchBarContainer.addSubview(searchBar)
// Add View as Title View in Navigation Bar
self.navigationController!.navigationBar.topItem?.titleView = searchBarContainer
Here is Code of my UISearchBar Class
func commonInit() -> Void {
// Update UI
if let searchField = self.valueForKey("searchField") as? UITextField{
// To change background color
searchField.backgroundColor = UIColor.appNavigationBarDarkRedColor()
// Tint Color
if let leftViewRef = searchField.leftView {
leftViewRef.tintColor = UIColor.whiteColor()
}else if let imgLeftView = searchField.leftView as? UIImageView{
imgLeftView.tintColor = UIColor.whiteColor()
}
// Font Color
searchField.font = UIFont.robotoRegularFont(WithSize: 14.0)
// Text Color
searchField.textColor = UIColor.whiteColor()
// PlaceHolder Attributes
searchField.attributedPlaceholder = NSAttributedString(string: "Search", attributes: [NSForegroundColorAttributeName:UIColor.whiteColor()])
}
self.setImage(UIImage(named: "ic_search_white"), forSearchBarIcon: UISearchBarIcon.Search, state: UIControlState.Normal)
// To change placeholder text color
}
Please someone help me here.

Answer 1

For 1) Set the searchBarStyle property to minimal. This will provides no default background color in UIsearchBar.
2)I'm not quite sure what'd you mean by "inner screen". But if what you want is a Search Bar that can work across different view controllers, UISearchController is the one you're looking for.
You can fine the Apple sample code here