iPhone上的图像的文件路径

Question

我有兴趣从iPhone库/照相机卷上传文件（图像）到远程Web服务器。我已经有了一个脚本，可以将任何文件从手机上传到网络服务器。但是，我认为要从iPhone上传图像，我需要PATH来表示图像。一旦用户从相机胶卷中选取所述图像，是否有任何方法可以完成？也就是说，如何获取在相机胶卷中选择的图像的文件路径？

我试图无果。

谢谢！

Answer 1

您将需要查看ALAssetsLibrary函数 - 这些函数允许您访问存储在iOS设备照片和视频库中的照片和视频。

具体是这样的：

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

如果您正在使用的UIImagePickerController，而不是纯粹的programatical方法，这大大简化了它：

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]; 
}