name of the picked image xcode

问题:

I want to get the name of the image picked from the library or newly clicked in -

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

I am using this code:

-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeSavedPhotosAlbum])
    {
        AppDelegate *del = [[UIApplication sharedApplication]delegate];
        [self dismissModalViewControllerAnimated:YES];
        image = [info objectForKey:UIImagePickerControllerOriginalImage];

        NSLog(@"imagekbgfg=====>%@",image);
        [self.imageView setImage:image];

        imgName = [info objectForKey:UIImagePickerControllerOriginalImage];

        del.mainImgName = imgName;
        del.imageData = UIImageJPEGRepresentation(image, 1.0);
        del.imageApp = image;
    }

    if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera])
    {
       image = [info objectForKey:UIImagePickerControllerOriginalImage];
    }
}

How can I do this?

回答1:

Using the code bellow you will get path like:assets-library://asset/asset.JPG?id=79450962-C0FD-484C-808B-83E045F40972&ext=JPG when your picking image from photo album. This path is valid. It contains the asset ID and asset type.

// Firstly get the picked image's file URL.
NSURL *imageFileURL = [info objectForKey:UIImagePickerControllerReferenceURL];

// Then get the file name.
NSString *imageName = [imageFileURL lastPathComponent];
NSLog(@"image name is %@", imageName);

If you want to get image user picked again using the path you get using UIImagePickerController.(Here maybe you want to save the path so that you can read that image back without asking user to pick that image again) You will need the ALAssetsLibrary otherwise you don't need it.

ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
__block UIImage *returnValue = nil;
[library assetForURL:imageFileURL resultBlock:^(ALAsset *asset) {
    returnValue = [UIImage imageWithCGImage:[[asset defaultRepresentation] fullResolutionImage]];
} failureBlock:^(NSError *error) {
    NSLog(@"error : %@", error);
}];

回答2:

Take a look at the UIImagePickerControllerDelegate Protocol. The string UIImagePickerControllerReferenceURL contains an URL of your file. You could use it to construct the filename from it.

Other than that there seems to be no built-in way to get the file name from an UIImage or UIImageView object.

Reference: Stackoverflow answer

回答3:

You can get the file name using below code:

NSURL *assetURL = [imageDic objectForKey:UIImagePickerControllerReferenceURL];

 __block NSString *originalFileName = nil;

 ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
 [library assetForURL:assetURL resultBlock:^(ALAsset *asset){
             originalFileName = [[asset defaultRepresentation] filename];
}

originalFileName give the original file name of resource.