Parse.com:在 TableViewCell 中检索布尔值 [英] Parse.com : Retrieve Boolean Value in TableViewCell

问题描述

Parse.com 我在我的项目中使用.在我的视图控制器中，我有一个搜索栏，它从一个与我需要的布尔值不同的类中获取数据.

Parse.com I'm using in my project . In my view controller I have a searchbar that fetches data from a class different from the one in which there is a Boolean value that I need.

简而言之，每个单元格都包含一个按钮，当按下该按钮时会消失，因为将创建一个布尔值，正如我上面所说，该值位于与主查询不同的另一个类中.

In a nutshell each cell contains a button that when pushed to disappear because is going to create a Boolean value that as I said above is in another class different from that of the main query .

为了帮助您理解:

搜索栏从类_USER"获取数据，其中所有驻留的注册用户应用程序

The search bar fetches the data from class " _USER " where all reside registered users app

按钮改为在Friends"类中创建一个布尔值

The button instead goes into creating a boolean value in the Class " Friends "

我无法连接这两个动作...

I can not connect the two actions ...

我做了一些测试，但我无法得到我想要的结果..你能解释一下我该如何解决这个问题吗?我不明白我的错误在哪里

I did some tests but I can not get the result I want .. Can you explain how I might do to fix this? I do not understand where is my mistake

这里我展示了查询和 cellForRowAtIndexPath

Here I show the query and the cellForRowAtIndexPath

- (Void) { retrieveFromParse
   
 
    PFQuery retrievePets * = [ PFQuery queryWithClassName : FF_USER_CLASS ] ;
    [ retrievePets orderByAscending : FF_USER_NOMECOGNOME ] ;
    
    [ retrievePets findObjectsInBackgroundWithBlock : ^ ( NSArray * objects , NSError * error ) {
        if ( error) {
            NSLog ( @ "% @ " , objects) ;
            allObjects = [ [ NSMutableArray alloc ] init ] ;
            for ( PFObject * object in objects) {
                [ allObjects addObject : object ] ;
                
            }
            
        }
        [ self.FFTableViewFindUser reloadData ] ;
    } ] ;
}






- ( UITableViewCell * ) tableView : ( UITableView * ) tableView cellForRowAtIndexPath : ( NSIndexPath * ) indexPath {
    static NSString * CellIdentifier = @ " CellFindUser " ;
    
    
    FFCellFindUser * cell = [ self.FFTableViewFindUser dequeueReusableCellWithIdentifier : CellIdentifier ] ;
    if ( cell) {
        cell = [ [ FFCellFindUser alloc ] initWithStyle : reuseIdentifier UITableViewCellStyleDefault : CellIdentifier ] ;
    }
    
    
       if (! isFiltered ) {
        
        
        PFObject * object = [ allObjects objectAtIndex : indexPath.row ] ;
        NSString * str = [object objectForKey : FF_USER_NOMECOGNOME ] ;

        cell.FFLabelCell_NomeCognome.text = str ;
        
        
        cell.FFIMGCell_FotoProfilo.image = [ UIImage imageNamed : @ " FFIMG_Camera "] ;
        [ cell.FFIMGCell_FotoProfilo.layer setMasksToBounds : YES] ;
        [ cell.FFIMGCell_FotoProfilo.layer setCornerRadius : 22.5f ] ;
        cell.FFIMGCell_FotoProfilo.file = [object objectForKey : FF_USER_FOTOPROFILO ] ;
        [ cell.FFIMGCell_FotoProfilo loadInBackground ] ;
        
       / / Cell.FFUserButton.tag = indexPath.row ;
       / / [ Cell.FFUserButton addTarget : self action: @ selector ( FFInviaRichiestaAmicizia :)
         / / ForControlEvents : UIControlEventTouchUpInside ] ;
          
           

/ / HERE I AM RECALLING THE BOOLEAN VALUE CLASS FRIENDSHIPS
         
  if ( [ [object objectForKey : @ " RICHIESTA_IN_ATTESA "] boolValue ] ) {
               
               [ cell.FFUserButton setHidden : YES] ;
           Else { }
               [ cell.FFUserButton setHidden : NO] ;
           }

}

推荐答案

您使用错误的方式来解决问题

You're approaching your problem in the wrong way by using

if ( [ [object objectForKey : @ " RICHIESTA_IN_ATTESA "] boolValue ] )

因为这意味着用户需要知道他们是否是当前用户的朋友.这是错误的方法.您当前的用户应该有其当前朋友的列表(对象 id 数组或 Parse 中的关系).您的表视图控制器也应该可以访问当前用户.然后，您编写代码来显示/隐藏按钮:

because that means that the users need to know if they are the friend of the current user. This is the wrong way round. You current user should have a list of its current friends (either an array of object ids or relationships in Parse). Your table view controller should also have access to the current user. Then, you write the code to show / hide the buttons as:

注意:currentUserFriends 是根据当前用户的关系/信息构建的用户对象 id 数组

Note: currentUserFriends is an array of user object ids built from the relationship / information on the current user

[cell.FFUserButton setHidden:([currentUserFriends containsObject: object.objectId])];

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