How do I debounce and throttle user input with Combine in Swift?

In Swift, using Combine to debounce and throttle user input can help improve performance and prevent excessive processing, especially in scenarios involving text input or gestures. Here's how you can implement both techniques.

Keywords: Swift, Combine, debounce, throttle, user input, performance, text input

Description: This guide explains how to use Combine framework in Swift to debounce and throttle user input, enhancing performance and user experience in your iOS applications.


        // Import Combine framework
        import Combine
        import UIKit

        class ViewController: UIViewController {
            @IBOutlet weak var textField: UITextField!
            private var cancellables = Set()
            
            override func viewDidLoad() {
                super.viewDidLoad()
                
                // Debounce user input
                textField.publisher
                    .compactMap { $0.text } // Extract text
                    .debounce(for: .milliseconds(300), scheduler: RunLoop.main) // Wait for 300 milliseconds
                    .sink { [weak self] text in
                        self?.performSearch(with: text) // Perform search with the input text
                    }
                    .store(in: &cancellables)

                // Throttle user input
                textField.publisher
                    .compactMap { $0.text } // Extract text
                    .throttle(for: .seconds(1), scheduler: RunLoop.main, latest: true) // Emit value every second
                    .sink { [weak self] text in
                        self?.updateUI(with: text) // Update UI with the input text
                    }
                    .store(in: &cancellables)
            }
            
            private func performSearch(with text: String) {
                // Implement search functionality
                print("Searching for: \(text)")
            }
            
            private func updateUI(with text: String) {
                // Update UI based on input
                print("UI updated with: \(text)")
            }
        }

Keywords: Swift Combine debounce throttle user input performance text input

How do I debounce and throttle user input with Combine in Swift?

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How do I debounce and throttle user input with Combine in Swift?

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