离开AVCaptureSession时停止ViewController

Question

ViewController和AVCaptureSession在一起。我可以轻松启动和停止AVCaptureSession：

var captureSession: AVCaptureSession?
captureSession = AVCaptureSession()

//start
captureSession?.startRunning() 

//stop
captureSession?.stopRunning() 

A想知道当用户打开另一个AVCaptureSession时如何停止ViewController。

Answer 1

只需让viewWillDisappear方法为您处理这个问题。

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