iOS拍照之系统拍照

拍照在App中使用频次高，入门级别直接调用系统拍照

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• 思路：

  系统拍照使用UIImagePickerController

  1.设置下plist，否则没权限，报错

  2.判断摄像头，获取权限，否则弹出界面黑着

  3.设置代理，实现代理

  4.代理方法中获取拍照的图片/视频

• 上菜

  • plist中添加Privacy - Camera Usage Description，文案根据App需要来

  • 权限

  if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) { }

  • 设置UIImagePickerController

  UIImagePickerController *vc = [[UIImagePickerController alloc] init];
  // 设置该属性的时候，出现拍照与拍视频选项
  vc.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];
  vc.sourceType = UIImagePickerControllerSourceTypeCamera;
  vc.delegate = self;
  vc.allowsEditing = NO;
  // 设置摄像头[后置摄像头]
  vc.cameraDevice = UIImagePickerControllerCameraDeviceRear;
  // 设置闪光模式
  vc.cameraFlashMode = UIImagePickerControllerCameraFlashModeAuto;
  // 设置摄像头模式
  vc.cameraCaptureMode = UIImagePickerControllerCameraCaptureModeVideo; // 当该模式设置为video的时候，meidaTypes设置出现拍照与拍视频选项时，先展示video视频拍摄选项
  // 录制的最大时间
  vc.videoMaximumDuration = 10;
  // 视频质量
  vc.videoQuality = UIImagePickerControllerQualityTypeHigh;
  vc.modalPresentationStyle = UIModalPresentationFullScreen;
  [[[[UIApplication sharedApplication] keyWindow] rootViewController] presentViewController:vc  animated:YES completion:nil];

  • 代理实现

    #pragma mark - UINavigationControllerDelegate, UIImagePickerControllerDelegate
    - (void)imagePickerController:(UIImagePickerController *)picker
    didFinishPickingMediaWithInfo:(NSDictionary<UIImagePickerControllerInfoKey,id> *)info {
            // 获取选中资源类型
            NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];
            if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) { // 拍照结果
                    UIImage *image = nil;
                    if (picker.allowsEditing) {
                            image = [info objectForKey:UIImagePickerControllerEditedImage];
                    } else {
                            image = [info objectForKey:UIImagePickerControllerOriginalImage];
                    }
                    [picker dismissViewControllerAnimated:YES completion:nil];
            } else if ([mediaType isEqualToString:(NSString *)kUTTypeMovie]) { // 视频结果
                    NSURL *url = [info objectForKey:UIImagePickerControllerMediaURL];
                    // 视频存放到系统相册
                    [PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {
                            if (status == PHAuthorizationStatusAuthorized) {
                                    [[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
                                                         [PHAssetChangeRequest creationRequestForAssetFromVideoAtFileURL:url];
                                                 } completionHandler:^(BOOL success, NSError * error) {
                                                         if (success) {
                                                                 NSLog(@"保存视频到相册");
                                                         } else {
                                                                 NSLog(@"保存视频到相册失败：%@", error);
                                                         }
                                                 }];
                            } else {
                                    NSLog(@"无访问相册权限");
                            }
                            dispatch_async(dispatch_get_main_queue(), ^{
                                    [picker dismissViewControllerAnimated:YES completion:nil];
                            });
                    }];
            }
    }
    - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
            [picker dismissViewControllerAnimated:YES completion:nil];
    }

• 结语：

  UIImagePickerController使用方便，可拍照、视频。适用于拍照界面无定制、简单取图这类需求

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