AVCaptureSession和预览层没有填充整个屏幕
AVCaptureSession和预览层没有填充整个屏幕
提问于 2017-02-20 15:21:03
因此，我尝试在我的应用程序中使用手机上的摄像头，而且我成功了，但不幸的是，当使用预览时，该层没有填充整个屏幕这是一张图片，给你看它是什么样子。
这是我的密码：
if let previewLayer = AVCaptureVideoPreviewLayer(session: captureSession) {
self.previewLayer = previewLayer
self.view.layer.addSublayer(self.previewLayer)
self.previewLayer.frame = self.view.layer.frame
captureSession.startRunning()
let dataOutput = AVCaptureVideoDataOutput()
dataOutput.videoSettings = [(kCVPixelBufferPixelFormatTypeKey as NSString):NSNumber(value:kCVPixelFormatType_32BGRA)]
dataOutput.alwaysDiscardsLateVideoFrames = true
if captureSession.canAddOutput(dataOutput) {
captureSession.addOutput(dataOutput)
}
captureSession.commitConfiguration()
let queue = DispatchQueue(label: "com.Osmo.captureQueue")
dataOutput.setSampleBufferDelegate(self, queue: queue)
}回答 3
Stack Overflow用户
回答已采纳
发布于 2017-02-21 04:59:03
请试用以下方法：
if let previewLayer = AVCaptureVideoPreviewLayer(session: captureSession) {
self.previewLayer = previewLayer
self.previewLayer.frame = self.view.bounds
self.previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
self.view.layer.insertSublayer(self.previewLayer, at: 0)
captureSession.startRunning()
let dataOutput = AVCaptureVideoDataOutput()
dataOutput.videoSettings = [(kCVPixelBufferPixelFormatTypeKey as NSString):NSNumber(value:kCVPixelFormatType_32BGRA)]
dataOutput.alwaysDiscardsLateVideoFrames = true
if captureSession.canAddOutput(dataOutput) {
captureSession.addOutput(dataOutput)
}
captureSession.commitConfiguration()
let queue = DispatchQueue(label: "com.Osmo.captureQueue")
dataOutput.setSampleBufferDelegate(self, queue: queue)
}Stack Overflow用户
发布于 2017-07-12 14:10:11
这可能是因为您试图从视图中设置预览层的框架，该框架具有自动布局约束。尝试将viewDidLayoutSubviews方法的重写添加到视图控制器：
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
self.previewLayer.frame = self.view.layer.bounds
}Stack Overflow用户
发布于 2017-02-22 05:18:44
试试下面的代码：
if let previewLayer = AVCaptureVideoPreviewLayer(session: captureSession) {
previewLayer.bounds = view.bounds
previewLayer.position = CGPoint(x: view.bounds.midX, y: view.bounds.midY) //CGPointMake(view.bounds.midX, view.bounds.midY)
previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
let cameraPreview = UIView(frame: CGRect(x: 0.0, y: 0.0, width: view.bounds.width, height: view.bounds.height));
cameraPreview.tag = 44221007
cameraPreview.layer.addSublayer(previewLayer)
//cameraPreview.addGestureRecognizer(UITapGestureRecognizer(target: self, action:Selector(("saveToCamera:"))))
view.addSubview(cameraPreview)
self.view.sendSubview(toBack: cameraPreview);
}苹果文件：
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原文链接：
https://stackoverflow.com/questions/42348237
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