iPhone可达性检查

iPhone可达性检查

swift
import UIKit
class ViewController: UIViewController {
    @IBOutlet weak var textView: UITextView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let tapGesture = UITapGestureRecognizer(target: self, action: #selector(handleTap(_:)))
        textView.addGestureRecognizer(tapGesture)
    }
    
    @objc func handleTap(_ gesture: UITapGestureRecognizer) {
        if gesture.state == .ended {
            if textView.font!.pointSize < 30 {
                textView.font = UIFont.systemFont(ofSize: 30)
            } else {
                textView.font = UIFont.systemFont(ofSize: 17)
            }
        }
    }
}

swift
import UIKit
import Speech
class ViewController: UIViewController, SFSpeechRecognizerDelegate {
    private let speechRecognizer = SFSpeechRecognizer(locale: Locale(identifier: "en-US"))!
    private var recognitionRequest: SFSpeechAudioBufferRecognitionRequest?
    private var recognitionTask: SFSpeechRecognitionTask?
    private let audioEngine = AVAudioEngine()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        speechRecognizer.delegate = self
        
        SFSpeechRecognizer.requestAuthorization { (status) in
            switch status {
            case .authorized:
                // 用户已授权使用语音识别功能
                self.startRecording()
            case .denied:
                // 用户拒绝使用语音识别功能
                break
            case .restricted:
                // 语音识别功能受限制，用户无法使用
                break
            case .notDetermined:
                // 语音识别功能未授权，需要用户确认
                break
            @unknown default:
                break
            }
        }
    }
    
    func startRecording() {
        recognitionRequest = SFSpeechAudioBufferRecognitionRequest()
        
        let inputNode = audioEngine.inputNode
        guard let recognitionRequest = recognitionRequest else { fatalError("Unable to create recognition request") }
        
        recognitionTask = speechRecognizer.recognitionTask(with: recognitionRequest) { (result, error) in
            if let result = result {
                // 在此处理语音识别结果
            }
        }
        
        let recordingFormat = inputNode.outputFormat(forBus: 0)
        inputNode.installTap(onBus: 0, bufferSize: 1024, format: recordingFormat) { (buffer, when) in
            self.recognitionRequest?.append(buffer)
        }
        
        audioEngine.prepare()
        try? audioEngine.start()
    }
    
    func stopRecording() {
        audioEngine.stop()
        recognitionRequest?.endAudio()
        recognitionRequest = nil
        recognitionTask = nil
    }
}

swift
import UIKit
class ViewController: UIViewController {
    @IBOutlet weak var label: UILabel!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        label.adjustsFontForContentSizeCategory = true
        label.font = UIFont.preferredFont(forTextStyle: .body)
    }
}