- (void)viewDidLoad  {      [super viewDidLoad];      // Do any additional setup after loading the view.             UIImageView *imageView = [[UIImageView alloc] init];      imageView.frame = CGRectMake(0, 0, 80, 120);      imageView.backgroundColor = [UIColor greenColor];      imageView.tag = 101;             [self.view addSubview:imageView];             UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];      button.frame = CGRectMake(0, 200, 100, 30);      [button setTitle:@"打开相册" forState:UIControlStateNormal];      [button addTarget:self action:@selector(openPics) forControlEvents:UIControlEventTouchUpInside];      [self.view addSubview:button];             UIButton *button2 = [UIButton buttonWithType:UIButtonTypeRoundedRect];      button2.frame = CGRectMake(0, 300, 100, 30);      [button2 setTitle:@"打开相机" forState:UIControlStateNormal];      [button2 addTarget:self action:@selector(openCamera) forControlEvents:UIControlEventTouchUpInside];      [self.view addSubview:button2];  }     // 打开相机  - (void)openCamera {      // UIImagePickerControllerCameraDeviceRear 后置摄像头      // UIImagePickerControllerCameraDeviceFront 前置摄像头      BOOL isCamera = [UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceRear];      if (!isCamera) {          NSLog(@"没有摄像头");          return ;      }             UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];      imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;      imagePicker.delegate = self;      // 编辑模式      imagePicker.allowsEditing = YES;             [self  presentViewController:imagePicker animated:YES completion:^{      }];            }        // 打开相册  - (void)openPics {         UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];      imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;      imagePicker.delegate = self;      [self  presentViewController:imagePicker animated:YES completion:^{      }];                }        // 选中照片     - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{      NSLog(@"%@", info);      UIImageView  *imageView = (UIImageView *)[self.view viewWithTag:101];      // UIImagePickerControllerOriginalImage 原始图片      // UIImagePickerControllerEditedImage 编辑后图片      UIImage *image = [info objectForKey:UIImagePickerControllerEditedImage];      imageView.image = image;      [picker dismissViewControllerAnimated:YES completion:NULL];         }           // 取消相册  - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {      [picker dismissViewControllerAnimated:YES completion:NULL];     }