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SwiftyCamera 是基于 Objective-C 开发的一个轻量级相机 SDK，其目的是想让开发相机应用的开发者更快速的集成相机功能。
在 Podfile 中引入：
pod 'SwiftyCamera' :git => 'https://github.com/machenshuang/SwiftyCamera', :branch => 'master'SwiftyCamera 通过 SYCameraConfig 配置相机的参数，使用 SYCameraManager 来管理相机对象，并用 SYCameraManagerDelegate 将相机的生命周期和状态回调给使用者。
构建单摄相机的过程：
let config = SYCameraConfig()
config.type = .singleDevice // 单摄模式
config.mode = .photoMode // 拍照模式
cameraManager.requestCamera(with: config) { [weak self](ret) in
guard let `self` = self else { return }
if ret == .success {
// 设置 delegate
self.cameraManager.delegate = self
// 将预览视图添加到 View 上
self.cameraManager.addPreview(to: self.previewView)
// 启动相机
self.cameraManager.startCapture()
}
}构建双摄相机的过程：
let config = SYCameraConfig()
config.type = .dualDevice // 双摄模式
config.mode = .photoMode // 拍照模式
cameraManager.requestCamera(with: config) { [weak self](ret) in
guard let `self` = self else { return }
if ret == .success {
// 设置 delegate
self.cameraManager.delegate = self
// 将预览视图添加到 View 上
self.cameraManager.addPreview(to: self.previewView)
// 启动相机
self.cameraManager.startCapture()
}
}构建和启动结果会通过 SYCameraManagerDelegate 方法回调：
extension ViewController: SYCameraManagerDelegate {
/// 相机配置结果
/// - Parameters:
/// - result: SYSessionSetupResult
/// - manager: SYCameraManager
func cameraSessionSetupResult(_ result: SYSessionSetupResult, with manager: SYCameraManager) {
}
/// 相机已启动
/// - Parameter manager: SYCameraManager
func cameraDidStarted(_ manager: SYCameraManager) {
}
/// 相机已停止
/// - Parameter manager: SYCameraManager
func cameraDidStoped(_ manager: SYCameraManager) {
}
}摄像头切换的过程：
@objc private func cameraFilp() {
// 判断相机状态
if cameraManager.result == .success {
isBacking = !isBacking
// 切换摄像头
cameraManager.changeCameraPosition(isBacking ? .back : .front)
}
}切换拍照和录制模式的过程：
@objc private func changeCameraMode(_ control: UISegmentedControl) {
if cameraManager.result != .success {
return
}
if control.selectedSegmentIndex == 0 {
// 切换拍照模式
cameraManager.changeCameraMode(.photoMode, withSessionPreset: nil)
} else if control.selectedSegmentIndex == 1 {
// 切换录制模式
cameraManager.changeCameraMode(.videoMode, withSessionPreset: nil)
}
}摄像头切换后的结果会通过 SYCameraManagerDelegate 方法回调：
extension ViewController: SYCameraManagerDelegate {
/// 相机设备切换改变
/// - Parameters:
/// - backFacing: 是否是后置
/// - manager: SYCameraManager
func cameraDidChangedPosition(_ backFacing: Bool, with manager: SYCameraManager) {
}
}调整焦点和曝光的过程：
@objc private func handleTapEvent(_ sender: UITapGestureRecognizer) {
if cameraManager.result != .success {
return
}
let point = sender.location(in: previewView)
cameraManager.focus(with: point, mode: .autoFocus)
cameraManager.exposure(with: point, mode: .autoExpose)
}调整焦点和曝光的结果会通过 SYCameraManagerDelegate 方法回调：
extension ViewController: SYCameraManagerDelegate {
/// 相机焦点调整改变
/// - Parameters:
/// - value: 位置
/// - mode: 模式
/// - manager: SYCameraManager
func cameraDidChangedFocus(_ value: CGPoint, mode: AVCaptureDevice.FocusMode, with manager: SYCameraManager) {
}
/// 相机曝光值调整改变
/// - Parameters:
/// - value: 曝光值
/// - mode: 模式
/// - manager: SYCameraManager
func cameraDidChangedExposure(_ value: CGPoint, mode: AVCaptureDevice.ExposureMode, with manager: SYCameraManager) {
}
}调整焦距的过程：
@objc private func handlePinchEvent(_ sender: UIPinchGestureRecognizer) {
if cameraManager.result != .success {
return
}
let scale = sender.scale
currentZoom = scale;
cameraManager.setZoom(currentZoom, withAnimated: true)
}调整焦距的结果会通过 SYCameraManagerDelegate 方法回调：
extension ViewController: SYCameraManagerDelegate {
/// 相机焦距调整改变
/// - Parameters:
/// - value: 焦距
/// - manager: SYCameraManager
func cameraDidChangedZoom(_ value: CGFloat, with manager: SYCameraManager) {
}
}拍照的过程：
@objc private func takePhoto() {
if cameraManager.result != .success {
return
}
cameraManager.takePhoto()
}拍照的结果会通过 SYCameraManagerDelegate 方法回调：
extension ViewController: SYCameraManagerDelegate {
/// 相机拍照结果
/// - Parameters:
/// - image: 图片
/// - metaData: 摘要
/// - manager: SYCameraManager
/// - error: 错误
func cameraDidFinishProcessingPhoto(_ image: UIImage?, withMetaData metaData: [AnyHashable : Any]?, with manager: SYCameraManager, withError error: Error?) {
}
}切换录制模式的过程：
@objc private func changeCameraMode(_ control: UISegmentedControl) {
if cameraManager.result != .success {
return
}
if control.selectedSegmentIndex == 0 {
cameraManager.changeCameraMode(.photoMode, withSessionPreset: nil)
} else if control.selectedSegmentIndex == 1 {
cameraManager.changeCameraMode(.videoMode, withSessionPreset: nil)
}
}模式切换的结果会通过 SYCameraManagerDelegate 方法回调：
extension ViewController: SYCameraManagerDelegate {
/// 相机模式改变
/// - Parameters:
/// - mode: 模式
/// - manager: SYCameraManager
func cameraDidChange(_ mode: SYCameraMode, with manager: SYCameraManager) {
}
}开始录制和结束录制的过程：
@objc private func handleRecordEvent(_ button: UIButton) {
if cameraManager.result != .success {
return
}
if recordMode == .recordNormal {
cameraManager.startRecord()
} else {
cameraManager.stopRecord()
}
}录制状态和录制结果会通过 SYCameraManagerDelegate 方法回调：
extension ViewController: SYCameraManagerDelegate {
/// 相机录制结果
/// - Parameters:
/// - outputURL: 保存路径
/// - manager: SYCameraManager
/// - error: error
func cameraDidFinishProcessingVideo(_ outputURL: URL?, with manager: SYCameraManager, withError error: Error?) {
}
/// 相机录制状态改变
/// - Parameters:
/// - status: 录制状态
/// - manager: SYCameraManager
func cameraRecordStatusDidChange(_ status: SYRecordStatus, with manager: SYCameraManager) {
}
}SwiftyCamera is available under the MIT license. See the LICENSE file for more info.