如何在ios中获取图像的日期，位置，大小和方向？

Question

当我点击照片库中的照片时，它会转到另一个带有xip的视图控制器并在xip中显示此图像。还有一个细节按钮。当按下细节按钮时，我想在该xip上显示所选图像的创建日期，位置大小，图像路径，相机信息和白平衡。

请帮助我如何在目标c中执行此操作。

Answer 1

不要忘记在构建阶段添加框架工作

#import <AssetsLibrary/AssetsLibrary.h>



- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{

NSURL *refURL = [info valueForKey:UIImagePickerControllerReferenceURL];

 // define the block to call when we get the asset based on the url (below)
   ALAssetsLibraryAssetForURLResultBlock resultblock = ^(ALAsset *imageAsset)
{
ALAssetRepresentation *imageRep = [imageAsset defaultRepresentation];
NSLog(@"[imageRep filename] : %@", [imageRep filename]);
};

// get the asset library and fetch the asset based on the ref url (pass in block above)
ALAssetsLibrary* assetslibrary = [[ALAssetsLibrary alloc] init];
[assetslibrary assetForURL:refURL resultBlock:resultblock failureBlock:nil];

}