ios - 如何将 AVCaptureStillImageOutput 转换为 UIImage 并保存为 NSData？

Question

我正在尝试使用我正在开发的应用程序发送照片，我已经制作了应用程序来拍照，然后当您点击发送时，它会发送您刚刚拍摄的照片以通过邮件发送。

但我不知道如何将类型AVCaptureStillImageOutput为的照片转换为UIImage并将其存储在 aNSData中，以便将其用作addAttachmentData.

我试图这样做：

let data: NSData = UIImagePNGRepresentation(image: stillImageOutput)

我有这个功能

func doSomethingWithImage(image: UIImage) {
        // do something here
        mc.addAttachmentData(UIImageJPEGRepresentation(UIImage(named: imageAsUIIMage)!, CGFloat(1.0))!, mimeType: "image/jpeg", fileName: "backupOne.jpeg")
    }

但它显示了一个错误，“使用未解析的标识符‘imageAsUIIMage’

我想获取 UIImage 以便通过电子邮件发送它。

Answer 1

您可以捕获图像并将其保存到文件并将其转换为UIImage使用stillImageOutput.captureStillImageAsynchronouslyFromConnection()

// setup code
stillImageOutput.outputSettings = [AVVideoCodecKey: AVVideoCodecJPEG]

captureSession.startRunning()

let connection = stillImageOutput.connectionWithMediaType(AVMediaTypeVideo)
    stillImageOutput.captureStillImageAsynchronouslyFromConnection(connection) { (sampleBuffer, error) in
    // NSData of jpeg data. Save to file and add as email attachment.
    let jpegData = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(sampleBuffer)

    dispatch_async(dispatch_get_main_queue(), {
        self.doSomethingWithJPEGImageData(jpegData!)
    })
}

// later on
func doSomethingWithJPEGImageData(jpegData: NSData) {
    mc.addAttachmentData(jpegData, mimeType: "image/jpeg", fileName: "backupOne.jpeg")
}