使用 UISearchBar 后打开一个 detailViewController

Posted 2023-03-04

【中文标题】使用 UISearchBar 后打开一个 detailViewController

【英文标题】：Open a detailViewController after use of UISearchBar

【发布时间】：2013-01-11 09:11:38

【问题描述】：

我有一个 UISearchBar 来搜索 tableView 中的一些数据，然后在搜索后选择一行来打开 detailViewController 。为此，行必须保持索引路径，并且在搜索后不要更改初始 indexPath，否则我无法在数据库中找到正确的元素。如何保留初始 indexPath？还有其他方法吗？

 -(void) searchExpositorsTableView
      [searchResult removeAllObjects]; 
      //In this array there are the elements resulted after research

      for (Database *currow in self.mutableArray)
         NSLog(@"list of expositors %@", self.mutableArray);

        NSRange titleResultsRange = [currow.name rangeOfString:self.searchBar.text options: NSCaseInsensitiveSearch];;
          if (titleResultsRange.length >0) 
                [searchResult addObject:currow.name];
                /*While I build this new array every indexPath change and the database
                  can not track down the original items*/
          
        

    NSLog(@"%@", searchResult);
   

   -(NSIndexPath *)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath

      if(canSelectRow)

           NSLog(@"%d", indexPath.row);
           /*the indexPath is new and the database can not track down the original items*/
           return indexPath;

       else
        return nil;
       
    NSLog(@"%d", indexPath.row);
 

 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
   //Open wrong element
 

【参考方案1】：

这样做

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

    [tableView deselectRowAtIndexPath:indexPath animated:YES];

    if(searching) // where searching is boolean YES is searching, NO if not searched any element
    
        //get your data from searchResults and open detailViewController
        Database *currow = [searchResults objectAtIndex:indexPath.row];
        DetailViewController = detailView = [[DetailViewController alloc] initWithNibName:@"DetailViewController" bundle:nil];
        [self.navigationController pushViewController:detailView animated:YES];
        [detailView release];
    
    else
    
        //get your data from self.mutableArray and open detailViewController
        Database *currow = [self.mutableArray objectAtIndex:indexPath.row];
        DetailViewController = detailView = [[DetailViewController alloc] initWithNibName:@"DetailViewController" bundle:nil];
        [self.navigationController pushViewController:detailView animated:YES];
        [detailView release];
    

【讨论】：

非常感谢。我未能创建 SearchResult。我确实得到了数据库的元素数组，而不是字符串数组，这样我就可以提取元素了。

【参考方案2】：

您可能在表视图数据方法中传递 searchResult 数组以生成搜索研究表视图，在这种情况下，您的表视图 indexpath.row 和 searchResult 数组中的对象索引必须相同：所以使用以下

-(NSIndexPath *)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath

  if(canSelectRow)
     NSString * name = [searchResult objectAtIndex:indexPath.row] ;
/*
  or  you should instead save the Database object in searchResult Array directly instead of currow.name , in that case

       Database *currow = [searchResult objectAtIndex:indexPath.row] ;

    */

   else
    return nil;
   
NSLog(@"%d", indexPath.row);

【参考方案3】：

您应该使用单元格的标签来代替。在 cellForRowAtIndexPath 中使用此代码

 cell.tag = indexPath.row;

然后取回索引路径

 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath
        int ind = [tableView cellForRowAtIndexPath:indexPath].tag;
        //now you have real indexpath