自定义相机视图Swift iOS 8 iPhone xCode 6.1
我想在我的iPhone里面使用相机。 我不想使用典型的全屏相机视图，但我自己的。
例如，我想在屏幕中间有一个正方形的200×200，并有一个相机预览。 在这个广场下面，我想要一个button来拍照。 怎么做？ 我很快就开始
您将需要使用AVFoundation Framework来让您在您的故事板中创build的视图中创build自己的AVCaptureSession 。 下面是一个很好的教程，向您展示如何find相机并创build捕获会话：
http://jamesonquave.com/blog/taking-control-of-the-iphone-camera-in-ios-8-with-swift-part-1/
本教程使用整个视图作为捕获视图，因此，如果在代码之后对相机进行build模，相机将会变得多大。 要在屏幕中间放置一个200×200的正方形，你必须在你的视图控制器上画出一个在你的故事板上，将它链接到swift文件中的一个variables，在所有的代码中，然后更改底部的部分说的是，
previewLayer?.frame = self.view.layer.frame
到your200by200View.layer.frame
希望这可以帮助。 如果没有，我可以尝试帮助更多，或者有人可以纠正我。
祝你好运！
另一个代码块。 如何使用iPhone手动对焦
import UIKit class ViewController: UIViewController { @IBOutlet var cameraView: CameraView! override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view, typically from a nib. } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } @IBAction func sliderChanged(sender: UISlider) { cameraView.setFocusWithLensPosition(sender.value) } } import UIKit import AVFoundation class CameraView: UIView { // AVFoundation properties let captureSession = AVCaptureSession() var captureDevice: AVCaptureDevice! var captureDeviceFormat: AVCaptureDeviceFormat? let stillImageOutput = AVCaptureStillImageOutput() var cameraLayer: AVCaptureVideoPreviewLayer? required init?(coder aDecoder: NSCoder) { super.init(coder: aDecoder) initCamera() } func initCamera() { captureSession.beginConfiguration() stillImageOutput.outputSettings = [AVVideoCodecKey: AVVideoCodecJPEG] // get the back camera if let device = cameraDeviceForPosition(AVCaptureDevicePosition.Back) { captureDevice = device captureDeviceFormat = device.activeFormat let error: NSErrorPointer = nil do { try captureDevice!.lockForConfiguration() } catch let error1 as NSError { error.memory = error1 } captureDevice!.focusMode = AVCaptureFocusMode.Locked captureDevice!.unlockForConfiguration() var deviceInput: AVCaptureDeviceInput! do { deviceInput = try AVCaptureDeviceInput(device: captureDevice) } catch let error1 as NSError { error.memory = error1 deviceInput = nil } if(error == nil) { captureSession.addInput(deviceInput) } captureSession.addOutput(stillImageOutput) // use the high resolution photo preset captureSession.sessionPreset = AVCaptureSessionPresetPhoto // setup camera preview cameraLayer = AVCaptureVideoPreviewLayer(session: captureSession) if let player = cameraLayer { player.videoGravity = AVLayerVideoGravityResizeAspectFill self.layer.addSublayer(player) player.frame = self.layer.bounds player.connection.videoOrientation = AVCaptureVideoOrientation.LandscapeRight } // commit and start capturing captureSession.commitConfiguration() captureSession.startRunning() } captureSession.commitConfiguration() } func setFocusWithLensPosition(pos: CFloat) { let error: NSErrorPointer = nil do { try captureDevice!.lockForConfiguration() } catch let error1 as NSError { error.memory = error1 } captureDevice!.setFocusModeLockedWithLensPosition(pos, completionHandler: nil) captureDevice!.unlockForConfiguration() } // return the camera device for a position func cameraDeviceForPosition(position:AVCaptureDevicePosition) -> AVCaptureDevice? { for device:AnyObject in AVCaptureDevice.devices() { if (device.position == position) { return device as? AVCaptureDevice; } } return nil } }
一个如何添加一个cameraOverlayView在屏幕中心创build一个200×200正方形的查看窗口的例子：
@IBAction func takePhoto(sender: AnyObject) { if !UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera){ return } var imagePicker = UIImagePickerController() imagePicker.delegate = self imagePicker.sourceType = UIImagePickerControllerSourceType.Camera; //Create camera overlay let pickerFrame = CGRectMake(0, UIApplication.sharedApplication().statusBarFrame.size.height, imagePicker.view.bounds.width, imagePicker.view.bounds.height - imagePicker.navigationBar.bounds.size.height - imagePicker.toolbar.bounds.size.height) let squareFrame = CGRectMake(pickerFrame.width/2 - 200/2, pickerFrame.height/2 - 200/2, 200, 200) UIGraphicsBeginImageContext(pickerFrame.size) let context = UIGraphicsGetCurrentContext() CGContextSaveGState(context) CGContextAddRect(context, CGContextGetClipBoundingBox(context)) CGContextMoveToPoint(context, squareFrame.origin.x, squareFrame.origin.y) CGContextAddLineToPoint(context, squareFrame.origin.x + squareFrame.width, squareFrame.origin.y) CGContextAddLineToPoint(context, squareFrame.origin.x + squareFrame.width, squareFrame.origin.y + squareFrame.size.height) CGContextAddLineToPoint(context, squareFrame.origin.x, squareFrame.origin.y + squareFrame.size.height) CGContextAddLineToPoint(context, squareFrame.origin.x, squareFrame.origin.y) CGContextEOClip(context) CGContextMoveToPoint(context, pickerFrame.origin.x, pickerFrame.origin.y) CGContextSetRGBFillColor(context, 0, 0, 0, 1) CGContextFillRect(context, pickerFrame) CGContextRestoreGState(context) let overlayImage = UIGraphicsGetImageFromCurrentImageContext() UIGraphicsEndImageContext(); let overlayView = UIImageView(frame: pickerFrame) overlayView.image = overlayImage imagePicker.cameraOverlayView = overlayView self.presentViewController(imagePicker, animated: true, completion: nil) }