ios - 点击对焦但曝光不起作用

Question

我尝试点击聚焦有一段时间了，我几乎尝试了所有方法，但似乎都不适合我。以下是我的接触开始，但它不起作用。应该但事实并非如此。我究竟做错了什么？

var newFocusPoint = CGPoint(x: touchPoint.locationInView(cameraView).x / screenSize.width, y: touchPoint.locationInView(cameraView).y / screenSize.height)

    if let cameraDevice = device {
        if(cameraDevice.lockForConfiguration(nil)) {
            if cameraDevice.focusPointOfInterestSupported {
                cameraDevice.focusPointOfInterest = newFocusPoint
                cameraDevice.focusMode = AVCaptureFocusMode.ContinuousAutoFocus
            }
            if cameraDevice.exposurePointOfInterestSupported {
                cameraDevice.exposurePointOfInterest = newFocusPoint
                cameraDevice.exposureMode = AVCaptureExposureMode.ContinuousAutoExposure
            }
            cameraDevice.unlockForConfiguration()
        }
    }

Answer 1

You made minor mistakes in your code, the lines below should fix it.

 cameraDevice.focusPointOfInterest = focusPoint
 cameraDevice.focusMode = AVCaptureFocusMode.AutoFocus
 cameraDevice.exposurePointOfInterest = focusPoint
 cameraDevice.exposureMode = AVCaptureExposureMode.ContinuousAutoExposure