(Swift) UISearchController로 Search Bar 구현하기

• UISearchController 을 통해, Search bar 의 search 중인 입력값 /  placeholder 등을 구현할 수 있다. 

 

class SearchViewController: UIViewController {
	...
    
    self.navigationItem.title = "Search"
    // search bar
    let searchController = UISearchController(searchResultController: nil)
    searchController.hideNavigationBarDuringPresentation = true
    searchController.searchBar.placeholder = "Search~~~"
    searchController.searchResultsUpdater = self // Must confirm delegate
    // search controller to integrate into navigation interface
    self.navigationItem.searchController = searchController
}

extend SearchViewController: UISearchResultsUpdating {
	func updateSearchResults(for searchController: UISearchController) {
    	let search = searchController.searchBar.text
        print("searching....: \(search)") // searching 되고있는 키보드 값 받아옴 
    }
}

 

 

1) hideNavigationBarDuringPresentation

 

: search bar 에서 입력시, Navigation bar 를 보여줄 것인가 / 숨길 것인가

   true : 숨기기

   false : 보여주기 

 

 

 

2) searchResultsUpdater

: UISearchResultsUpdating delegate 준수 하기 

 

 

 

3) navigationItem.searchController

: search controller 를 navigation interface 와 통합시키기

 

https://developer.apple.com/documentation/uikit/uinavigationitem/2897305-searchcontroller

searchController | Apple Developer Documentation