ios - AVCaptureDevice弱光加速

有谁知道如何为您的ios相机应用设置弱光增强？这是我拥有的代码，但无法使其正常工作。

let backCamera = AVCaptureDevice.defaultDevice(withMediaType: AVMediaTypeVideo)
    do {
                try backCamera?.lockForConfiguration()
                if (backCamera?.isLowLightBoostSupported == true) {
                   backCamera?.automaticallyEnablesLowLightBoostWhenAvailable = true
                }
                 backCamera?.unlockForConfiguration()
                 }
                 catch{
                     print(error)
                 }

最佳答案

你不需要那个。将其放在didMoveToView中:

captureSession!.sessionPreset = AVCaptureSessionPresetPhoto