【发布时间】：2016-01-18 17:12:07
【问题描述】：
我正在使用 AVCaptureSession 创建一个相机，并尝试用它拍照。这是加载相机的代码...
func reloadCamera() {
cameraView.backgroundColor = UIColor.clearColor()
captureSession = AVCaptureSession()
captureSession!.sessionPreset = AVCaptureSessionPresetHigh
let backCamera = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)
if (camera == false) {
let videoDevices = AVCaptureDevice.devicesWithMediaType(AVMediaTypeVideo)
for device in videoDevices {
let device = device as! AVCaptureDevice
if device.position == AVCaptureDevicePosition.Front {
captureDevice = device
break
} else {
captureDevice = backCamera
}
}
} else {
captureDevice = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)
}
do {
let input = try AVCaptureDeviceInput(device: captureDevice)
if captureSession!.canAddInput(input) {
captureSession!.addInput(input)
stillImageOutput = AVCaptureStillImageOutput()
stillImageOutput!.outputSettings = [AVVideoCodecKey: AVVideoCodecJPEG]
if captureSession!.canAddOutput(stillImageOutput) {
captureSession!.addOutput(stillImageOutput)
previewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
previewLayer!.videoGravity = AVLayerVideoGravityResizeAspectFill
previewLayer!.connection?.videoOrientation = AVCaptureVideoOrientation.Portrait
previewLayer?.frame = cameraView.bounds
cameraView.layer.addSublayer(previewLayer!)
captureSession!.startRunning()
}
}
} catch let error as NSError {
// Handle any errors
print(error)
}
}
这是我拍照的方式...
func didPressTakePhoto(){
toggleFlash()
if let videoConnection = stillImageOutput?.connectionWithMediaType(AVMediaTypeVideo){
videoConnection.videoOrientation = (previewLayer?.connection.videoOrientation)!
stillImageOutput?.captureStillImageAsynchronouslyFromConnection(videoConnection, completionHandler: {
(sampleBuffer, error) in
if sampleBuffer != nil {
let imageData = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(sampleBuffer)
self.capturedImage = UIImage(data: imageData)
if self.camera == true {
self.capturedImage = UIImage(CGImage: self.capturedImage.CGImage!, scale: 1.0, orientation: UIImageOrientation.Right)
} else {
self.capturedImage = UIImage(CGImage: self.capturedImage.CGImage!, scale: 1.0, orientation: UIImageOrientation.LeftMirrored)
}
self.tempImageView.image = self.capturedImage
UIImageWriteToSavedPhotosAlbum(self.capturedImage, nil, nil, nil);
self.tempImageView.hidden = false
self.goButton.hidden = false
self.cameraView.hidden = true
self.removeImageButton.hidden = false
self.captureButton.hidden = true
self.flashChanger.hidden = true
self.switchCameraButton.hidden = true
}
})
}
}
但是发生的情况是拍摄的图片与整个屏幕一样大（如 Snapchat），但我只希望它与我从中获取它的 UIView 一样大。告诉我您是否需要更多信息。谢谢！
【问题讨论】：
-
“但是发生的事情是拍摄的图片与整个屏幕一样大”实际上我希望它会比这大得多。你怎么知道它有多大？我没有看到任何捕获图片或对捕获的图片执行任何操作的代码。
标签： ios swift uiimageview uiimage avcapturesession