ios - 如何通过 iOS 中的 JSON webservices post 方法将一组图像发送到服务器？

Question

我想知道如何使用 UIImagePickerController 获取一组图像，并将一个数组发布到服务器，以及如何使用 JSON Web 服务从服务器获取一组图像。而且我还需要将图像信息(拍摄日期)发布到服务器。

我正在使用 UIImagePickerController 获取图像。这是我的代码

-(IBAction)fileselectionAction:(id)sender{

    [self.view endEditing:YES];
    UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Pick Photo From" delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:@"Photo Album", @"Take New Photo", @"Cancel", nil];

    [actionSheet showFromToolbar:self.navigationController.toolbar];
}
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
    self.imagePickerController = [[UIImagePickerController alloc] init];
    self.imagePickerController.delegate = self;

    if (buttonIndex == 0) {
        //[self.imagePickerController setAllowsEditing:YES];
        self.imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        self.imagePickerController.allowsEditing = YES;
        [self presentViewController:self.imagePickerController animated:YES completion:nil];

    } else if (buttonIndex == 1) {

        if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
            self.imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
            [self.imagePickerController setAllowsEditing:YES];
            //self.imagePickerController.showsCameraControls = YES;

            [self presentViewController:self.imagePickerController animated:YES completion:nil];

        }
    }
}
- (void)imagePickerController:(UIImagePickerController *)picker
        didFinishPickingImage:(UIImage *)image
                  editingInfo:(NSDictionary *)info
{

   [picker dismissViewControllerAnimated:YES completion:nil];
    picker = nil;
    NSData *imageData = UIImageJPEGRepresentation(image,0.0);
    self.image1 = [UIImage imageWithData:imageData];
}

提前致谢。

Answer 1

Web 服务不提供用于发送图像的 API 吗？如果是这样，请使用它。

否则，如果您也自己开发网络服务，请不要使用 JSON 嵌入图像，而是使用适当的内容类型。

如果您绝对必须使用 JSON，则需要将图像编码为 JSON 兼容的字符串，例如base64，然后将带有元数据的图像作为 JSON 字符串发送。