Question

我想用查询绘制，我的用户在UIImageView中的个人资料图片...这段代码给了我图片但只有昵称...你能帮我理解错误在哪里吗？

谢谢！

 -(void)viewDidAppear:(BOOL)animated {

    //Prepare the query to get the profile image
    //1
    PFQuery *query = [PFQuery queryWithClassName:@"User"];
    PFQuery* queryPhoto = [PFQuery queryWithClassName:@"Foto_Profilo"];

    //2
    PFUser* currentUser = [PFUser currentUser];
    if (currentUser) {
        [query whereKey:@"user" equalTo:currentUser];
        [queryPhoto whereKey:@"Immagine" equalTo:currentUser];

        [query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
            // Verify if there are no errors
            if (!error) {

                // Retrieve Usename
                self.profileViewUsernameLabel.text = [NSString stringWithFormat:@"%@",[[PFUser currentUser]valueForKey:@"username"]] ;

                // Retrieve Photo

                PFObject* profilePhotoObject = [PFObject objectWithClassName:@"Foto_Profilo"];
                PFFile* currentUserPhoto = (PFFile *)[profilePhotoObject objectForKey:@"Immagine"];
                UIImageView* currentUserImage = [[UIImageView alloc]initWithImage:[UIImage imageWithData:currentUserPhoto.getData]];



                [self.showfoto addSubview:currentUserImage];
            } else {
                NSString *errorString = [[error userInfo] objectForKey:@"error"];
                UIAlertView *errorAlertView = [[UIAlertView alloc] initWithTitle:@"Error" message:errorString delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil];
                [errorAlertView show];

            }

        } ];

    }
}

Answer 1

问题不完全清楚，但我想你得到了名字，而不是图片。

profilePhotoObject是一个新的空对象，因此当您从中请求objectForKey:@"Immagine"时，您将获得无效。

您定义queryPhoto但从未实际执行过它。执行它并将结果与当前块分开处理。

您创建了2个查询。执行1并且不使用结果。你不执行另一个（看起来实际上有图像的那个）。

让我们尝试用以下代码替换您当前的查询：

        [queryPhoto findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
        // Verify if there are no errors
        if (objects.count >= 1) {

            // Retrieve Usename
            self.profileViewUsernameLabel.text = [NSString stringWithFormat:@"%@",[[PFUser currentUser]valueForKey:@"username"]] ;

            // Retrieve Photo

            PFObject* profilePhotoObject = objects[0]
            PFFile* currentUserPhoto = (PFFile *)[profilePhotoObject objectForKey:@"Immagine"];
            UIImageView* currentUserImage = [[UIImageView alloc]initWithImage:[UIImage imageWithData:currentUserPhoto.getData]];

请注意，这会使用您创建的其他查询并使用执行查询的结果。

Answer 2

使用此...

PFQuery *queryUser = [PFUser query];
[queryUser whereKey:@"username" equalTo:[[PFUser currentUser]username]];
[queryUser getFirstObjectInBackgroundWithBlock:^(PFObject *object, NSError *error){

        //Cargo la imagen de la celda
        PFFile *theImage = [object objectForKey:@"userImage"];
        NSData *imageData = [theImage getData];
        UIImage *profileImage = [UIImage imageWithData:imageData];

        if (profileImage == nil) {
            _imgProfile.image = [UIImage imageNamed:@"noPhoto.png"];
        } else {
            _imgProfile.image = profileImage;
        }


}];

查询解析图像

2 个答案: