Question

我从Facebook获取用户信息，图片和用户名。我向用户显示此信息。但问题是;图片即将推迟。所以我使用SVProgressHUD就像加载...我想在下载我的图片并向用户显示后解雇我的SVProgressHUD。我需要使用Asynchronous或类似的东西是什么？

这是我的代码部分;

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.

RoundedImageView *profileImageView = [[RoundedImageView alloc] initWithFrame:CGRectMake(27, 80, 70, 70)];

_userNameLabel.hidden = YES;
profileImageView.hidden = YES;
[SVProgressHUD showWithStatus:@"Loading..."];

//[NSTimer scheduledTimerWithTimeInterval:2.0f target:self selector:@selector(LoadingDismiss) userInfo:nil repeats:NO];

[[FBRequest requestForMe] startWithCompletionHandler:^(FBRequestConnection *connection, NSDictionary<FBGraphUser> *FBuser, NSError *error) {
    if (error) {
        // Handle error
    }

    else {
        NSString *username = [FBuser name];
        NSLog(@"username = %@",username);

        NSString *userBirtday = [FBuser birthday];
        NSLog(@"birthday = %@",userBirtday);

        NSString *email = [FBuser objectForKey:@"email"];
        NSLog(@"email = %@",email);

        NSString *userID = [FBuser objectForKey:@"id"];
        NSLog(@"userID = %@",userID);
        //==========================================================================ResimAlma
        NSString *userImageURL = [NSString stringWithFormat:@"https://graph.facebook.com/%@/picture?type=normal", userID];
        NSURL * imageURL = [NSURL URLWithString:userImageURL];
        NSData * imageData = [NSData dataWithContentsOfURL:imageURL];
        UIImage *image = [UIImage imageWithData:imageData];



        //Configring the rounded imageview by setting appropriate image and offset.
        profileImageView.imageOffset = 2.5;
        profileImageView.image = image;
        profileImageView.backgroundImage = [UIImage imageNamed:@"dp_holder_large.png"];

        [self.view addSubview:profileImageView];

        if (image == nil) {

            profileImageView.imageOffset = 2.5;
            profileImageView.image = [UIImage imageNamed:@"noImage.png"];
            profileImageView.backgroundImage = [UIImage imageNamed:@"dp_holder_large.png"];

        }else{
            profileImageView.imageOffset = 2.5;
            profileImageView.image = image;
            profileImageView.backgroundImage = [UIImage imageNamed:@"dp_holder_large.png"];

        }

        _userNameLabel.text = username;

        _userNameLabel.hidden = NO;
        profileImageView.hidden = NO;

    }
}];

[SVProgressHUD dismiss];

}

感谢您的关注和帮助。：）

Answer 1

将[SVProgressHUD dismiss]放入完成块的结束。使用您当前的代码，进度指示器将在您向Facebook发出请求后立即解除（因为该呼叫是非阻塞的）。

Answer 2

把

[SVProgressHUD dismiss];

在完成块内

下载数据异步ios

2 个答案: