如何同步AVCaptureDevice setFocusModeLockedWithLensPosition调用

import AVFoundation

func setFocusModeLockedWithLensPosition() {
    guard let device = AVCaptureDevice.default(for: .video) else {
        print("无法获取摄像头设备")
        return
    }
    
    guard device.isFocusModeSupported(.locked) else {
        print("设备不支持锁定焦点模式")
        return
    }
    
    do {
        try device.lockForConfiguration()
        defer {
            device.unlockForConfiguration()
        }
        
        let lensPosition: Float = 0.5 // 设置焦距位置，范围为0.0到1.0
        
        device.setFocusModeLocked(lensPosition: lensPosition, completionHandler: nil)
        
        // 其他设置，如曝光、白平衡等
        // ...
        
    } catch {
        print("无法锁定设备配置：\(error.localizedDescription)")
    }
}