UI（三十九）录像、拍照

录像拍照

 1、导入框架#import -> UIImagePickerController

 2、先区分 选择摄像头、相册  sourceType

 （1）UIImagePickerControllerSourceTypePhotoLibrary 摄像头

 （2）UIImagePickerControllerSourceTypeCamera 相册

 （3）UIImagePickerControllerSourceTypeSavedPhotosAlbum 相册

 3、再区分录像与拍照 cameraCaptureMode:

 （0）设置录像-> 要先选择媒体的类型 默认拍照不崩溃因为默认设置媒体类型是kUTTypeImage ※※※※※※不然会崩溃

 （1）录像:UIImagePickerControllerCameraCaptureModeVideo

 （2）拍照:UIImagePickerControllerCameraCaptureModePhoto

 4、区分前后摄像头 cameraDevice

 （1）UIImagePickerControllerCameraDeviceRear 前摄像头

 （2）UIImagePickerControllerCameraDeviceFront 后摄像头

 5、选择媒体类型 mediaTypes

 （1）选择媒体类型 默认kUTTypeImage

 （2）kUTTypeImage包含在框架->#import

 （3）需要的内容不是OC里面的字符串类型 需要强制转换

 （4）录制视频 -> 类型要选择kUTTypeMovie 它里面包含了audio和vidio

 6、设置是否显示控制控件 showsCameraControls

 7、设置拍照 takePicture

 8、录像 startVideoCapture、stopVideoCapture

 9、设置视频清晰度 videoQu

 （1）UIImagePickerControllerQualityTypeHigh

 （2）UIImagePickerControllerQualityTypeMedium

 （3）UIImagePickerControllerQualityTypeLow

 （4）UIImagePickerControllerQualityType640x480

 （5）UIImagePickerControllerQualityTypeIFrame1280x720

 （6）UIImagePickerControllerQualityTypeIFrame960x540

 10、设置视频最大的录像时间videoMaximumDuration

 11、设置闪光 cameraFlashMode

 （1）UIImagePickerControllerCameraFlashModeOff 关闭

 （2）UIImagePickerControllerCameraFlashModeAuto自动-默认

 （3）UIImagePickerControllerCameraFlashModeOn 开启

 12、设置调用摄像头视频页面的覆盖视图cameraOverlayView

 13、设置拍照页面的形态 cameraViewTransform

 14、代理 delegate 需要导入两个代理

   

 方法：

 - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info;采集完成之后调用、不区分摄像拍照

 - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker;采集取消的时候调用

 15、（1）把图片保存到相册

 UIImageWriteToSavedPhotosAlbum(finishImage, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);

 （2）保存成功的回调方法

 - (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo{

 NSLog(@"图片保存成功");

 }

16、（1）保存视频到相册

 NSString *path = (NSString *)[info[UIImagePickerControllerMediaURL] path];

 UISaveVideoAtPathToSavedPhotosAlbum(path, self, @selector(video:didFinishSavingWithError:contextInfo:), nil);

 （2）视频保存到相册之后调用

 - (void)video:(NSString *)videoPath didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo{

}

 17、（1）JPEG格式图片转换成NSData

 NSData *imageData = UIImageJPEGRepresentation(finishImage, 0.1);

 （2）PNG格式图片转换成NSData

 NSData *imageData1 = UIImagePNGRepresentation(finishImage);