Swift

1，打开相机拍照

通过设置图片控制器UIImagePickerController的来源为UIImagePickerControllerSourceType.Camera，便可以打开相机

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import UIKit   class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {     override func viewDidLoad() {         super.viewDidLoad()     }        //拍照     @IBAction func fromPhotograph(sender: AnyObject) {         if UIImagePickerController.isSourceTypeAvailable(.Camera){             //创建图片控制器             let picker = UIImagePickerController()             //设置代理             picker.delegate = self             //设置来源             picker.sourceType = UIImagePickerControllerSourceType.Camera             //允许编辑             picker.allowsEditing = true             //打开相机             self.presentViewController(picker, animated: true, completion: { () -> Void in                               })         }else{             println("找不到相机")         }     }           override func didReceiveMemoryWarning() {         super.didReceiveMemoryWarning()     } }

2，调用前置，后置摄像头

相机默认使用后置摄像头，可以设置UIImagePickerControllerCameraDevice类型来使用前置摄像头或后置摄像头。

像iTouch设备不具备前置摄像头，我们可以事先判断下是否支持前置。

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//如果有前置摄像头则调用前置摄像头 if UIImagePickerController.isCameraDeviceAvailable(UIImagePickerControllerCameraDevice.Front){     picker.cameraDevice = UIImagePickerControllerCameraDevice.Front }

3，设置闪光灯
通过cameraFlashMode属性可以设置闪光灯：开启/关闭/自动

1 2	//开启闪光灯 picker.cameraFlashMode = UIImagePickerControllerCameraFlashMode.On