iOS 系统相机 2021-07-27

1、权限配置

相机权限 Privacy - Camera Usage Description App想要访问您手机的系统相机，是否允许？
麦克风权限 Privacy - Microphone Usage Description App想要访问您手机的麦克风，是否允许？

录制音视频需要以上权限

2、引入头文件:里面定义了kUTTypeImage、kUTTypeMovie等，不引入会报错

  #import <MobileCoreServices/MobileCoreServices.h>

3、打开系统相机录制视频的方法

  - (void)openCamera {
      UIImagePickerController *pickerCon = [[UIImagePickerController alloc]init];
      pickerCon.sourceType = UIImagePickerControllerSourceTypeCamera;
      pickerCon.mediaTypes = @[(NSString *)kUTTypeMovie];//设定相机为视频
      pickerCon.cameraDevice = UIImagePickerControllerCameraDeviceRear;//设置相机后摄像头
      pickerCon.videoMaximumDuration = 10;//最长拍摄时间
      pickerCon.videoQuality = UIImagePickerControllerQualityTypeHigh;//拍摄质量
      pickerCon.allowsEditing = NO;
      pickerCon.delegate = self;
      [self presentViewController:pickerCon animated:YES completion:nil];
  }

4、回调

#pragma mark - UIImagePickerControllerDelegate
//selected
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    //此处需要先dismiss掉picker，然后再present出alert，佛否则alert显示会出bug
    [picker dismissViewControllerAnimated:YES completion:nil];

    if (picker.sourceType == UIImagePickerControllerSourceTypeCamera)
    {
            NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];
    //如果是拍照
            if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) {
        
           }
            //如果是录制视频
            else if([mediaType isEqualToString:(NSString *)kUTTypeMovie]) {
                  NSLog(@"*******info*******%@",info);
                  NSURL *url = [info objectForKey:UIImagePickerControllerMediaURL];
                  NSString *videoPath = url.path;
                  //保存到相册
                  if (UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(videoPath)) {
                        NSLog(@"保存成功");
                  } else {
                      NSLog(@"保存失败");
                }
        }
    }
}
//cancel
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
      [picker dismissViewControllerAnimated:YES completion:nil];
}