在我正在开发的应用程序中,用户需要进行“自拍”(是的,我知道,但该应用程序仅供私有(private)使用)。
我已经在圆形 UIView 区域中显示相机的所有内容,但是我无法正确缩放和填充圆圈。这是它现在正在做的事情:
这就是我希望它做的:
这是我的 UIView 的代码:
var cameraView = UIView()
cameraView.frame = CGRectMake(100, self.view.center.y-260, 568, 568)
cameraView.backgroundColor = UIColor(red:26/255, green:188/255, blue:156/255, alpha:1)
cameraView.layer.cornerRadius = 284
cameraView.layer.borderColor = UIColor.whiteColor().CGColor
cameraView.layer.borderWidth = 15
cameraView.contentMode = UIViewContentMode.ScaleToFill
cameraView.layer.masksToBounds = true
我尝试了几种不同的 contentMode 选项,包括 ScaleToFill、ScaleAspectFill 和 ScaleAspectFit。它们都产生完全相同的结果。
最佳答案
事实证明,相机的“self.previewLayer”有一个属性决定相机的内容如何填充 View 。
在下面的代码中,我将“self.previewLayer.videoGravity = AVLayerVideoGravityResizeAspect”更改为“self.previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill”
extension SelfieViewController: AVCaptureVideoDataOutputSampleBufferDelegate{
func setupAVCapture(){
session.sessionPreset = AVCaptureSessionPreset640x480
let devices = AVCaptureDevice.devices();
// Loop through all the capture devices on this phone
for device in devices {
// Make sure this particular device supports video
if (device.hasMediaType(AVMediaTypeVideo)) {
// Finally check the position and confirm we've got the front camera
if(device.position == AVCaptureDevicePosition.Front) {
captureDevice = device as? AVCaptureDevice
if captureDevice != nil {
beginSession()
break
}
}
}
}
}
func beginSession(){
var err : NSError? = nil
var deviceInput:AVCaptureDeviceInput = AVCaptureDeviceInput(device: captureDevice, error: &err)
if err != nil {
println("error: \(err?.localizedDescription)")
}
if self.session.canAddInput(deviceInput){
self.session.addInput(deviceInput)
}
self.videoDataOutput = AVCaptureVideoDataOutput()
var rgbOutputSettings = [NSNumber(integer: kCMPixelFormat_32BGRA):kCVPixelBufferPixelFormatTypeKey]
self.videoDataOutput.alwaysDiscardsLateVideoFrames=true
self.videoDataOutputQueue = dispatch_queue_create("VideoDataOutputQueue", DISPATCH_QUEUE_SERIAL)
self.videoDataOutput.setSampleBufferDelegate(self, queue:self.videoDataOutputQueue)
if session.canAddOutput(self.videoDataOutput){
session.addOutput(self.videoDataOutput)
}
self.videoDataOutput.connectionWithMediaType(AVMediaTypeVideo).enabled = true
self.previewLayer = AVCaptureVideoPreviewLayer(session: self.session)
self.previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
var rootLayer :CALayer = self.cameraView.layer
rootLayer.masksToBounds=true
self.previewLayer.frame = rootLayer.bounds
rootLayer.addSublayer(self.previewLayer)
session.startRunning()
}
func captureOutput(captureOutput: AVCaptureOutput!, didOutputSampleBuffer sampleBuffer: CMSampleBuffer!, fromConnection connection: AVCaptureConnection!) {
// do stuff here
}
// clean up AVCapture
func stopCamera(){
session.stopRunning()
}
}
关于ios - 前置摄像头填充圆形 UIView,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/28683863/