Hi,
I am using XCode 7.3 with swift version 1.2 to build a custom camera app. I need to create one switch button for front and back camera. On running the app, it displays result from one camera okay but as soon as I touch the switch button it doesn't fetch input from the front camera and displays white blank screen.
Code that I am using is like below:
import UIKit
import AVFoundation
class ViewController: UIViewController {
@IBOutlet weak var cameraView: UIView!
var captureSession = AVCaptureSession()
var sessionOutput = AVCaptureStillImageOutput()
var previewLayer = AVCaptureVideoPreviewLayer()
let screenSize:CGRect = UIScreen.mainScreen().bounds
enum cameraType{
case Back
case Front
}
var frontCamera = false
var cameraPosition = AVCaptureDevicePosition.Back
override func viewDidLoad() {
super.viewDidLoad()
reloadCamera()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
override func prefersStatusBarHidden() -> Bool {
return true
}
@IBAction func takePhoto(sender: AnyObject) {
if let videoConnection = sessionOutput.connectionWithMediaType(AVMediaTypeVideo){
sessionOutput.captureStillImageAsynchronouslyFromConnection(videoConnection, completionHandler: {
buffer, error in
let imageData = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(buffer)
UIImageWriteToSavedPhotosAlbum(UIImage(data:imageData)!, nil, nil, nil)
})
}
}
@IBAction func switchCamera(sender: AnyObject) {
frontCamera = !frontCamera
captureSession.stopRunning()
previewLayer.removeFromSuperlayer()
captureSession.commitConfiguration()
reloadCamera()
}
func reloadCamera(){
var captureDevice:AVCaptureDevice! = nil
if (frontCamera == true) {
let videoDevices = AVCaptureDevice.devicesWithMediaType(AVMediaTypeVideo)
for device in videoDevices{
let device = device as! AVCaptureDevice
if device.position == AVCaptureDevicePosition.Front {
captureDevice = device
break
}
}
} else {
captureDevice = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)
}
do{
let input = try AVCaptureDeviceInput(device: captureDevice)
captureSession.stopRunning()
previewLayer.removeFromSuperlayer()
captureSession.removeInput(input)
captureSession.removeOutput(sessionOutput)
if captureSession.canAddInput(input){
captureSession.addInput(input)
sessionOutput.outputSettings = [AVVideoCodecKey:AVVideoCodecJPEG]
if captureSession.canAddOutput(sessionOutput){
captureSession.addOutput(sessionOutput)
captureSession.startRunning()
previewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
previewLayer.connection.videoOrientation = AVCaptureVideoOrientation.Portrait
cameraView.layer.addSublayer(previewLayer)
previewLayer.frame = CGRectMake(0, 0, screenSize.width , screenSize.height)
}
}
}
catch{
print("Error")
}
}
}
