iphone - iPhone 上图片的文件路径

Question

我有兴趣将文件(图像)从 iPhone 库/相机胶卷上传到远程网络服务器。我已经有一个脚本可以将任何文件从手机上传到网络服务器。但是，我假设要从 iPhone 上传图像，我需要该图像的路径。一旦用户从相机胶卷中选择了所述图像，有什么办法可以做到这一点？即，如何获取在相机胶卷中选择的图像的文件路径？

我试过了没有用。

谢谢!

Answer 1

你会想看看 ALAssetsLibrary功能 - 这些功能可让您访问存储在 iOS 设备上的照片和视频库中的照片和视频。

具体来说，像这样:

ALAssetsLibrary *assets = [[ALAssetsLibrary alloc] init];

[assets enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos
    usingBlock:^(ALAssetsGroup *group, BOOL *stop) {
        [group enumerateAssetsUsingBlock:^(ALAsset *asset, NSUInteger index, BOOL *stop) {
            //the ALAsset should be one of your photos - stick it in an array and after this runs, use it however you need
        }
    }
    failureBlock:^(NSError *error) {
        //something went wrong, you can't access the photo gallery
    }
];

编辑

如果您使用的是 UIImagePickerController 而不是纯粹的编程方法，这会大大简化它:

在:

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    UIImage *img = [info objectForKey:UIImagePickerControllerEditedImage];
    //you can use UIImagePickerControllerOriginalImage for the original image

    //Now, save the image to your apps temp folder, 

    NSString *path = [NSTemporaryDirectory() stringByAppendingPathComponent:@"upload-image.tmp"];
    NSData *imageData = UIImagePNGRepresentation(img);
    //you can also use UIImageJPEGRepresentation(img,1); for jpegs
    [imageData writeToFile:path atomically:YES];

    //now call your method
    [someClass uploadMyImageToTheWebFromPath:path];
}