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标题: iphone - UIImagePickerController 选择多个图像 [打印本页]

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作者: 菜鸟教程小白    时间: 2022-12-12 23:29
标题: iphone - UIImagePickerController 选择多个图像

我正在尝试使用 UIImagePickerController 从照片库中选择多个图像，我希望可以在照片选择器底部添加一个 subview ，使其看起来像这个应用程序:

有简单的方法可以做到吗？我的代码目前只以标准方式弹出图像，但我只在加载 6 张图像时关闭 Controller

重要的是，如果我可以向照片选择器 View 添加一个小 View /工具栏，就像示例中所做的那样，那么我可以完成剩下的工作

    - (void)getMediaFromSourceUIImagePickerControllerSourceType)sourceType{
      //get all available source types
      NSArray *mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:sourceType];

      //if source type available and supported media type is not null
      if ([UIImagePickerController isSourceTypeAvailable:sourceType
           && [mediaTypes count] > 0]) {

        UIImagePickerController *picker = [[UIImagePickerController alloc] init];
        //picker.mediaTypes = mediaTypes;   //allow videos
        picker.delegate = self;
        picker.sourceType = sourceType; //set source type to the given type

        /** WANT TO ADD A CUSTOM VIEW IN THE PHOTO PICKER VIEW **/

        [self presentViewController:picker animated:YES completion:nil];
      } else {
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle"Error accessing media"
                                                        message"Device doesn't support that media type"
                                                       delegate:nil
                                              cancelButtonTitle"Drat !"
                                              otherButtonTitles: nil];
        [alert show];
      }
    }

    - (void)imagePickerControllerUIImagePickerController *)picker didFinishPickingMediaWithInfoNSDictionary *)info{
      self.lastChosenMediaType = [info objectForKey:UIImagePickerControllerMediaType];  //record media type

      //if media type is image
      if ([lastChosenMediaType isEqualNSString *) kUTTypeImage]) {
        UIImage *chosenImage = [info objectForKey:UIImagePickerControllerOriginalImage];    //load image

        //save the image if is from camera shot
        if (imageOrVideoSourceType == UIImagePickerControllerSourceTypeCamera) {
          UIImageWriteToSavedPhotosAlbum (chosenImage, nil, nil , nil);
        }

        [images addObject:chosenImage]; //add to image list
        imageNum++;
      }

      changeImageOrVideo = true;

      if(imageNum >= 5){
          [picker dismissViewControllerAnimated:YES completion:nil];
      }
    }

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Best Answer-推荐答案

使用诸如将 UIImagePickerController 向上移动并在下方显示所选图像之类的技巧的主要原因是， Assets 库替代方案会涉及到用户被要求访问位置，因为有关照片拍摄地点的信息在图像元数据中可用.

在 iOS 6 中，系统会询问用户是否要允许应用访问他们的照片(而不是位置)，并且对于 Assets 库方法和 UIImagePickerController 方法都会询问您这个问题。

因此，我认为像上面这样的黑客已经接近了它们的用处。 Here is a link to a library providing selection of multiple images using the Assets library还有其他的。

关于iphone - UIImagePickerController 选择多个图像，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/13093143/

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