解析查询检索 NSNumber 堆栈中的下一个对象

Question

我正在尝试从我的解析中检索下一组解析数据 class，但我完全停滞不前，无法完成我正在尝试做的事情。

示例用户从提示 #1 开始，然后按下一步并显示提示 #2，依此类推。

我在我的 "Next" 按钮上有一个解析查询，它应该将解析中的下一个提示加载到我的名为 tipBody 的 UILabel 中，并将下一个连续的提示编号加载到我的 tipNumber 标签中。

- (IBAction)nextTipAction:(id)sender
{
    [ProgressHUD show:@"Loading Next Tip"];
    //Get Current Comments//

    __weak typeof (self) weakSelf = self;

    PFQuery *query = [PFQuery queryWithClassName:@"Archive"];
    [query whereKey:@"body" equalTo:@"tipNumber"];
    [query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
        if (!error)
        {

            weakSelf.tipNumberLabel.text =[NSString stringWithFormat:@"Tip Number: %ld", [[weakSelf.currentTip objectForKey:@"tipNumber"] integerValue]];
            [self.currentTip incrementKey:@"tipNumber" byAmount:@+1];
            [ProgressHUD dismiss];

        }
        else
        {
            [ProgressHUD dismiss];
            [ProgressHUD showError:@"Sorry! Unable to load Tips"];
            // Log details of the failure
            NSLog(@"Error: %@ %@", error, [error userInfo]);
        }
    }];
}

非常感谢任何帮助！谢谢！

Answer 1

检查您的代码如下。

- (IBAction)nextTipAction:(id)sender
{
    NextTipNumber++;  // Assume that on didload it initiate to 1 and also load on view didload you have load first tip.

    [ProgressHUD show:@"Loading Next Tip"];
    //Get Current Comments//

    __weak typeof (self) weakSelf = self;

    PFQuery *query = [PFQuery queryWithClassName:@"Archive"];
    [query orderByAscending:@"tipNumber"];
    [query setLimit: NextTipNumber];   // Set the limit according which tip you want to access
    [query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
        if (!error)
        {
            PFObject *ArchiveObject = [objects lastObject];
            weakSelf.tipNumberLabel.text = [ArchiveObject objectForKey:@"tipNumber"];
            weakSelf.tipBody.text = [ArchiveObject objectForKey:@"body"];

            [ProgressHUD dismiss];
        }
        else
        {
            [ProgressHUD dismiss];
            [ProgressHUD showError:@"Sorry! Unable to load Tips"];
            // Log details of the failure
            NSLog(@"Error: %@ %@", error, [error userInfo]);
        }
    }];
}

解析查询检索 NSNumber 堆栈中的下一个对象

Parse Query Retrieving Next Object in NSNumber Stack

xcode

nsnumber

ios

parse-platform