离开时停止 AVCaptureSession ViewController

Question

我有 ViewController AVCaptureSession。我可以轻松启动和停止 AVCaptureSession :

var captureSession: AVCaptureSession?
captureSession = AVCaptureSession()

//start
captureSession?.startRunning() 

//stop
captureSession?.stopRunning() 

想知道当用户打开另一个 ViewController.

时如何停止 AVCaptureSession

Answer 1

让 viewWillDisappear 方法为您处理。

override func viewWillDisappear(animated: Bool) {
    super.viewWillDisappear(animated)
    captureSession?.stopRunning()
}