当源类型为UIImagePickerController中的Camera时，获取图像元数据中的位置（一种地理标记）

Question

I am trying to get or capture user location within metadata of image picked by UIImagePickerController having source type set UIImagePickerControllerSourceTypeCamera .

When source type is camera(image clicked by camera), we can get metadata from the info parameter of didFinishPickingMediaWithInfo but it doesn't contain location information.

If source type is photolibrary (UIImagePickerControllerSourceTypePhotoLibrary) then we can get location in metadata with below code,

 -(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{


    NSURL *url = [info objectForKey:UIImagePickerControllerReferenceURL];
    PHFetchResult *fetchResult = [PHAsset fetchAssetsWithALAssetURLs:@[url] options:nil];
    PHAsset *asset = fetchResult.firstObject;

    NSLog(@"%f,%f",asset.location.coordinate.latitude,asset.location.coordinate.longitude);


[picker dismissViewControllerAnimated:YES completion:nil];

}

Second thing we can also manage location with CLLocationManager , I mean we can capture location in didFinishPickingMediaWithInfo . But I just want to know that is it possible to pick location with metadata in didFinishPickingMediaWithInfo when image is picked by camera or source type is camera ?

Any help will be appreciated. Thanks!

Answer 1

我得出的结论是，如果我们使用Camera则无法在元数据中获取位置，因此，如果要在从Camera捕获图像时获取位置，则必须在捕获时使用默认位置服务（ CLLocationManager ）-I在didFinishPickingMediaWithInfo方法中的平均值。