• 我打开了，获取僵尸对象，报的错是PUUIImageViewController retain.

#pragma mark 修改头像
- (void)avatarChangeOnClicked {
    UIAlertController *alterController = [UIAlertController alertControllerWithTitle:nil message:nil preferredStyle:UIAlertControllerStyleActionSheet];
    UIAlertAction *cameraAction = [UIAlertAction actionWithTitle:@"相机" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        [self openCamera];
    }];
    UIAlertAction *albumAction = [UIAlertAction actionWithTitle:@"相册" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        [self openAlbum];
    }];
    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

    }];
    [alterController addAction:cameraAction];
    [alterController addAction:albumAction];
    [alterController addAction:cancelAction];
    [self presentViewController:alterController animated:YES completion:nil];
}

- (void)openCamera {
    [self openImagePickerController:UIImagePickerControllerSourceTypeCamera];
}

- (void)openAlbum {
    // 如果想自己写一个图片选择控制器，得利用AssetsLibrary.framework，利用这个框架可以获得手机上的所有相册图片
    // UIImagePickerControllerSourceTypePhotoLibrary > UIImagePickerControllerSourceTypeSavedPhotosAlbum
    [self openImagePickerController:UIImagePickerControllerSourceTypePhotoLibrary];
}

- (void)openImagePickerController:(UIImagePickerControllerSourceType)type {

    if (![UIImagePickerController isSourceTypeAvailable:type]) return;

    if (type == UIImagePickerControllerSourceTypeCamera) {
        if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {

            if ([[AVCaptureDevice class] respondsToSelector:@selector(authorizationStatusForMediaType:)]) {
                AVAuthorizationStatus authorizationStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
                if (authorizationStatus == AVAuthorizationStatusRestricted
                    || authorizationStatus == AVAuthorizationStatusDenied) {

                    // 没有权限
                    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:nil
                                                                        message:@"没有权限访问相机，您可以在 (设置 > 隐私 > 相机)打开应用访问权限，即可自定义图片!"
                                                                       delegate:nil
                                                              cancelButtonTitle:@"OK"
                                                              otherButtonTitles:nil];
                    [alertView show];
                    return;
                }
            }
        }
    }

    UIImagePickerController *ipc = [[UIImagePickerController alloc] init];
    ipc.delegate = self;
    ipc.allowsEditing = YES;
    ipc.sourceType = type;
    [self presentViewController:ipc animated:YES completion:nil];
}

#pragma mark - UIImagePickerControllerDelegate
/**
 * 从UIImagePickerController选择完图片后就调用（拍照完毕或者选择相册图片完毕）
 */
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    /*
     ==<PUUIAlbumListViewController: 0x1360eae00>
     ==<PUUIPhotosAlbumViewController: 0x135a3a000>
     ==<PUUIImageViewController: 0x137574330>
     -[PUUIImageViewController retain]
     */
    for (UIViewController *vc in [picker viewControllers]) {
        Class class = NSClassFromString(@"PUUIImageViewController");
        if ([vc isKindOfClass:class]) {
            [self addChildViewController:vc];
        }
    }

    [picker dismissViewControllerAnimated:YES completion:nil];
    // info中就包含了选择的图片
    UIImage *editImage = info[UIImagePickerControllerEditedImage];
    self.avatarImageView.image = editImage;
    // 上传头像
    [self avatarChangeFromImage:editImage];
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
     [picker dismissViewControllerAnimated:YES completion:nil];
}

参考链接