如何以240fps的速度调用captureOutput？

import AVFoundation

class CameraViewController: UIViewController, AVCaptureVideoDataOutputSampleBufferDelegate {
    let captureSession = AVCaptureSession()
    let videoOutput = AVCaptureVideoDataOutput()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 设置输入设备为摄像头
        guard let camera = AVCaptureDevice.default(for: .video) else { return }
        guard let input = try? AVCaptureDeviceInput(device: camera) else { return }
        captureSession.addInput(input)
        
        // 设置输出为视频数据
        videoOutput.setSampleBufferDelegate(self, queue: DispatchQueue(label: "videoQueue"))
        captureSession.addOutput(videoOutput)
        
        // 设置帧率为240fps
        for vFormat in camera.formats {
            let ranges = vFormat.videoSupportedFrameRateRanges as [AVFrameRateRange]
            let frameRates = ranges[0]
            if frameRates.maxFrameRate == 240 {
                do {
                    try camera.lockForConfiguration()
                    camera.activeFormat = vFormat as AVCaptureDevice.Format
                    camera.activeVideoMinFrameDuration = frameRates.minFrameDuration
                    camera.activeVideoMaxFrameDuration = frameRates.maxFrameDuration
                    camera.unlockForConfiguration()
                } catch {
                    print("Error setting frame rate: \(error)")
                }
            }
        }
        
        // 开始捕获
        captureSession.startRunning()
    }
    
    // 捕获输出的回调方法
    func captureOutput(_ output: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) {
        // 在这里处理每一帧的图像数据
        // ...
    }
}