Question

我想获取从图书馆挑选的图片的名称或新点击的图片 -

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

我正在使用此代码：

-(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];
    }
}

我该怎么做？

Answer 1

使用下面的代码，当您从相册中挑选图片时，您将获得类似assets-library://asset/asset.JPG?id=79450962-C0FD-484C-808B-83E045F40972&ext=JPG的路径。此路径有效。它包含资产ID和资产类型。

// 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);

如果您希望使用UIImagePickerController使用的路径再次选择图像用户。（这里可能您希望保存路径，以便您可以在不要求用户再次选择该图像的情况下读回该图像）您将需要ALAssetsLibrary，否则您不需要它。

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);
}];

Answer 2

看看UIImagePickerControllerDelegate协议。字符串 UIImagePickerControllerReferenceURL 包含文件的URL。您可以使用它从中构造文件名。

除此之外，似乎没有内置方法从UIImage或UIImageView对象获取文件名。

参考： Stackoverflow answer

Answer 3

您可以使用以下代码获取文件名：

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给出资源的原始文件名。

拾取图像的名称xcode

3 个答案: