https://github.com/dulingkang/camera
custom camera using swift
https://github.com/dulingkang/camera
Last synced: 12 months ago
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custom camera using swift
- Host: GitHub
- URL: https://github.com/dulingkang/camera
- Owner: dulingkang
- License: mit
- Created: 2015-12-11T03:19:47.000Z (over 10 years ago)
- Default Branch: master
- Last Pushed: 2015-12-15T08:40:56.000Z (over 10 years ago)
- Last Synced: 2025-03-25T09:21:24.678Z (over 1 year ago)
- Language: Swift
- Size: 50.8 KB
- Stars: 6
- Watchers: 1
- Forks: 2
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Camera
Custom camera using swift, can take photo, front camera flip
## 最基本的捕获图像
- 需要一个session：
```
let session = AVCaptureSession()
```
- 需要相机设备输入，前置或者后置：
```
let devices = AVCaptureDevice.devicesWithMediaType(AVMediaTypeVideo)
for device in devices {
if device.position == position {
captureDevice = device as! AVCaptureDevice
}
}
```
position为init时指定的前置或者后置相机位置
- 现在有了相机设备，就可以获得AVCaptureDeviceInput，将它设为session的输入：
```
do {
input = try AVCaptureDeviceInput.init(device: captureDevice)
if session.canAddInput(input) {
session.addInput(input)
}
} catch {
print("add video input error")
}
}
```
- 如果获得了相机使用权限，显示相机图像流简单的方法是用AVCaptureVideoPreviewLayer：
```
previewLayer = AVCaptureVideoPreviewLayer.init(session: session)
previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
previewLayer.frame = CGRectMake(0, 0, kScreenWidth, kScreenHeight - kCameraBottomHeight - kNavigationHeight)
```
## 使用相机
- 初始化preset:
```
camera = SSCamera.init(sessionPreset: AVCaptureSessionPresetPhoto, position: .Front)
```
- 添加上previewLayer:
```
cameraView.preview.layer.addSublayer(camera.previewLayer)
```
## 拍完照图像翻转
- 相机在不同的方向拍照时，拍出的照片带有方向信息，以前置拍照为例，如果想让前置所见即所得，应该这样：
```
outputImage = UIImage(CGImage: inputImage.CGImage!, scale: inputImage.scale, orientation: UIImageOrientation.LeftMirrored)
```
- 然后再来一次绘制，下面的方法会把图片按照当前的方向绘制出来：
```
UIGraphicsBeginImageContext(size)
inputImage.drawInRect(CGRectMake(0,0, size.width, size.height))
let scaledImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
```