我正在使用 AVFoundation 相机制作 iPhone 应用程序，但相机无法正确缩放。
我想我已经做了很多工作来使其大小相同，我将视频重力更改为ResizeAspectFill，并将previewlayer.frame.size更改为self.layer.frame.size。
为什么我的预览图层没有延伸到整个 View ？是我输入错误还是只是忘记了需要输入的内容？谢谢!
代码:
import AVFoundation
import UIKit
import QuartzCore
class View1: UIViewController {
let captureSession = AVCaptureSession()
var previewLayer: CALayer!
var captureDevice: AVCaptureDevice!
@IBOutlet weak var photoButton: UIButton!
@IBOutlet weak var cameraView: UIView!
override func viewDidLoad() {
super.viewDidLoad()
photoButton.layer.zPosition = 1
}
@IBAction func photoButtonpressed(_ sender: UIButton) {
let button = sender as UIButton
if (button.tag == 1){
print("Photobutton clicked")
}
}
func prepareCamera(){
captureSession.sessionPreset = AVCaptureSessionPreset1920x1080
if let availableDevices = AVCaptureDeviceDiscoverySession(deviceTypes: [.builtInWideAngleCamera],
mediaType: AVMediaTypeVideo,
position: .back).devices {
captureDevice = availableDevices.first
beginSession()
}
}
func beginSession(){
do {
let captureDeviceInput = try AVCaptureDeviceInput(device: captureDevice)
captureSession.addInput(captureDeviceInput)
} catch {
print(error.localizedDescription)
}
if let previewLayer = AVCaptureVideoPreviewLayer(session: captureSession){
self.previewLayer = previewLayer
self.view.layer.addSublayer(self.previewLayer)
self.previewLayer.frame = self.view.layer.frame
self.previewLayer.bounds = self.view.bounds
self.previewLayer.contentsGravity = AVLayerVideoGravityResizeAspectFill
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()
}
}
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
prepareCamera()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
最佳答案
我复制您的代码并在 iOS 10.1.1、iPhone6、XCode 8.2.1 上运行，它可以工作。
如何加载View1？以编程方式？在 Storyboard中启动？ View1 的 view 的大小可能与您的设备屏幕不同。
关于ios - 为什么我的预览图层没有覆盖整个 View ？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/45405309/