Hello world

extension TodoListViewController: UISearchBarDelegate {
    func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
        let request: NSFetchRequest<Item> = Item.fetchRequest()
        
        let predicate = NSPredicate(format: "title CONTAINS %@", searchBar.text!)
        request.predicate = predicate
        
        let sordDescriptr = NSSortDescriptor(key: "title", ascending: true)
        
        request.sortDescriptors = [sordDescriptr]
        
        do {
            itemArray = try context.fetch(request)
        } catch {
            print("Error fetching data from context \\(error)")
        }
        
        tableView.reloadData()
    }
}

• 검색할 데이터를 가져오고 (위의 예시에서는 코어데이터의 Item Entity)
• 검색 조건을 설정해준다 (NSPredicate) : 서치바에 입력된 문자가 포함된 'title'이라는 속성
• request의 조건에 설정한 predicate를 부착
• sortDescriptor도 설정
• context.가져오기(설정했던 요청사항대로)
• itemArray에는 조건을 만족하는 데이터들이 들어감

Delegate

text 변경을 감지

func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
    if searchBar.text?.count == 0 {
        loadItems()
				DispatchQueue.main.async {
	          searchBar.resignFirstResponder()
        }
    }
}

❓How to force first letter to lower capitalize?

// uisearchbar first letter lower capitalize???
searchBar.searchTextField.autocapitalizationType = .none

&ref

First Letter Capitalize | https://stackoverflow.com/questions/34529909/uitextfield-and-uisearch-bar-disable-capital-letters-button-swift

ResignFirstResponder | https://developer.apple.com/documentation/uikit/uiresponder/1621097-resignfirstresponder