如何在iOS8.1上使用Swift按序列拍摄多张照片(每张照片延迟1秒)？

概述我试图在单个用户点击相机预览后拍几张照片,这样我就可以呈现它们,用户可以选择一个时机最好或者在“电影条”模式下全部使用.预期的用户体验是：“我打开相机,拍照,然后我看到每秒拍摄5张照片.我没有按下’拍照’按钮5次,一个就足以启动序列” . 我是iOS和Swift的新手,我的工作基于’Swift Recipes’一书(https://www.safaribooksonline.com/library 我试图在单个用户点击相机预览后拍几张照片,这样我就可以呈现它们,用户可以选择一个时机最好或者在“电影条”模式下全部使用.预期的用户体验是：“我打开相机,拍照,然后我看到每秒拍摄5张照片.我没有按下’拍照’按钮5次,一个就足以启动序列” .

我是iOS和Swift的新手,我的工作基于’Swift Recipes’一书(https://www.safaribooksonline.com/library/view/ios-8-swift/9781491908969/).

拍摄单张照片的源代码是：

controller = UIImagePickerController()    if let theController = controller{        theController.sourceType = .Camera        theController.mediaTypes = [kUTTypeImage as Nsstring]        theController.allowsEditing = true        theController.delegate = self        presentVIEwController(theController,animated: true,completion: nil)    }

加上相关的图像处理(通过func imagePickerController).我尝试使用上面的控制器目标,但悲惨地失败了:(我相信这不是正确的方式来获得我想要的,但我很难找到合适的.任何帮助将不胜感激.

解决方法 我不知道UIImagePickerController中是否存在此行为的模式.如果我是你,我会用 AVFoundation来实现这个.

import UIKitimport AVFoundationclass VIEwController: UIVIEwController {    var connection: AVCaptureConnection!    var output: AVCaptureStillimageOutput!    var vIDeoPrevIEwLayer: AVCaptureVIDeoPrevIEwLayer!    @IBOutlet var vIDePrevIEwVIEw: UIVIEw!    overrIDe func vIEwDIDLoad() {        super.vIEwDIDLoad()        self.createCamera()    }    overrIDe func vIEwDIDLayoutSubvIEws() {        super.vIEwDIDLayoutSubvIEws()        self.vIDeoPrevIEwLayer.bounds = self.vIDePrevIEwVIEw.bounds        self.vIDeoPrevIEwLayer.position = CGPoint(x: CGRectGetMIDX(self.vIDePrevIEwVIEw.bounds),y: CGRectGetMIDY(self.vIDePrevIEwVIEw.bounds))    }    func createCamera() {        let captureSession = AVCaptureSession()        if captureSession.canSetSessionPreset(AVCaptureSessionPresetHigh) {            captureSession.sessionPreset = AVCaptureSessionPresetHigh        } else {            println("Error: Couldn't set preset = \(AVCaptureSessionPresetHigh)")            return        }        let cameraDevice = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVIDeo)        var error: NSError?        let inputDevice = AVCaptureDeviceinput.deviceinputWithDevice(cameraDevice,error: &error) as AVCaptureDeviceinput        if let error = error {            println("Error: \(error)")            return        }        if captureSession.canAddinput(inputDevice) {            captureSession.addinput(inputDevice)        } else {            println("Error: Couldn't add input device")            return        }        let imageOutput = AVCaptureStillimageOutput()        if captureSession.canAddOutput(imageOutput) {            captureSession.addOutput(imageOutput)        } else {            println("Error: Couldn't add output")            return        }        // Store imageOutput. We will need it to take photo        self.output = imageOutput        let connection = imageOutput.connections.first as AVCaptureConnection!        // Store this connection in property. We will need it when we take image.        self.connection = connection        connection.vIDeoOrIEntation = AVCaptureVIDeoOrIEntation.Portrait        captureSession.startRunning()        // This will prevIEw the camera        let vIDeolayer = AVCaptureVIDeoPrevIEwLayer(session: captureSession)        vIDeolayer.vIDeoGravity = AVLayerVIDeoGravityResizeAspectFill        vIDeolayer.contentsScale = UIScreen.mainScreen().scale        self.vIDePrevIEwVIEw.layer.addSublayer(vIDeolayer)        // Store this layer instance in property. We will place it into a vIEw        self.vIDeoPrevIEwLayer = vIDeolayer    }    func takePhoto(completion: (UIImage?,NSError?) -> VoID) {        self.output.captureStillimageAsynchronouslyFromConnection(self.connection) { buffer,error in            if let error = error {                completion(nil,error)            } else {                let imageData = AVCaptureStillimageOutput.jpegStillimageNSDataRepresentation(buffer)                let image = UIImage(data: imageData,scale: UIScreen.mainScreen().scale)                completion(image,nil)            }        }    }}

现在你所要做的就是创建一个调用takePhoto 3次的动作.您可以使用NSTimer执行此 *** 作.

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