如何检查所选图像是全景图像还是非图像 [英] How to check a image selected is Panorama image or Not

问题描述

如何检查，从 UIImagePickerController 中选择的图像是不是全景图像？

How to check, the image selected from UIImagePickerController is a Panorama Image or not?

推荐答案

在这个 UIImagePickerController 委托方法中（确保将委托方法添加到View Controller类中）：

In this UIImagePickerController delegate method (be sure to add delegate methods to your View Controller class):

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
  [self dismissViewControllerAnimated:YES completion:NULL];
  UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];   

  // determine if it's panorama by checking its dimension
  CGFloat imageWidth = image.size.width;
  CGFloat imageHeight = image.size.height;

  // display the image if needed
  [self.imageView setImage:image];

  self.imagePickerController = nil;
}

理论上，全景图像的宽度比普通图像长得多。但这无法检查它是否是从其他地方下载的网络图像。

Theoretically panorama images have much longer width than normal image. But this can't check if it is a web image downloaded from elsewhere.

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