Swift 3.0 打开手机手电筒

发布时间：2020-12-14 06:38:41 所属栏目：百科来源：网络整理

导读：@IBAction func lightButtonClick(_ sender : UIButton) { let device = AVCaptureDevice.defaultDevice( withMediaType : AVMediaTypeVideo) if device == nil { sender.isEnabled = false return } if device?.torchMode == AVCaptureTorchMode. off { do

@IBAction func lightButtonClick(_ sender: UIButton) {
        let device = AVCaptureDevice.defaultDevice(withMediaType: AVMediaTypeVideo)
        if device == nil {
            sender.isEnabled = false
            return
        }
        if device?.torchMode == AVCaptureTorchMode.off{
            do {
                try device?.lockForConfiguration()
            } catch {
                return
            }
            device?.torchMode = .on
            device?.unlockForConfiguration()
            sender.isSelected = true
        }else {
            do {
                try device?.lockForConfiguration()
            } catch {
                return
            }
            device?.torchMode = .off
            device?.unlockForConfiguration()
            sender.isSelected = false
        }
    }

（编辑：李大同）

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