当在 UISearchBar 中粘贴搜索字段时，searchBar textDidChange 被调用两次

Posted 2023-03-04

【中文标题】当在 UISearchBar 中粘贴搜索字段时，searchBar textDidChange 被调用两次

【英文标题】：searchBar textDidChange is called two times when search field taped in UISearchBar

【发布时间】：2012-03-20 16:27:35

【问题描述】：

我有一个 UISearchBar 在以这种方式从 viewDidLoad 调用的函数中以编程方式创建

//***************************************
//***  Build the UINavigationBar        *
//***************************************
- (void) buildBar 

    search = [[UISearchBar alloc] init];
    [search sizeToFit];
    search.delegate = self;
    [[search.subviews objectAtIndex:0] removeFromSuperview];

    self.navigationItem.titleView = search;

    tools = [[UIToolbar alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 110.0f, 44.01f)];
   tools.barStyle = UIBarStyleBlackTranslucent; 
    if(tools.subviews.count >0)
    
        [[[tools subviews] objectAtIndex:0] removeFromSuperview];
    
    NSMutableArray *buttons = [[NSMutableArray alloc] initWithCapacity:2];
    [buttons addObject:[self editButtonItem]];
    bi = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh target:self action:@selector(activateActions:)];

    bi.style = UIBarButtonItemStyleBordered;

    [buttons addObject:bi];
    [bi release];

    [tools setItems:buttons animated:NO];

    [buttons release];

    UIBarButtonItem *tollbarButtons = [[UIBarButtonItem alloc] initWithCustomView:tools];

    self.navigationItem.rightBarButtonItem = tollbarButtons; 

    [tollbarButtons release];

 //   [tools release];
//    [search release];

当我点击搜索字段时，我的 [searchBar textDidChange] 委托被调用了两次，我无法弄清楚，仅在用户第一次点击搜索字段时发生，这是正常响应吗？ 听到是密码

-(void) searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText 
      if([searchText length] == 0 && firstTimeSearch == NO )
          firstTimeSearch = YES;
          [filterCalls removeAllObjects];
          [filterCalls addObjectsFromArray:allCalls];

/*          [searchBar performSelector: @selector(resignFirstResponder) 
                          withObject: nil 
                          afterDelay: 0.1];*/
    
    else
          firstTimeSearch = NO;
          [filterCalls removeAllObjects]; 
        [filteredCallsDetails removeAllObjects];

 //        
          int i = 0;
          for(NSDictionary *call in callsDetails )

//              NSNumber *callId = [call objectForKey:@"CallID"];

              generalUtils *gu = [[generalUtils alloc]init];
              NSArray *callDetail = [[NSArray alloc]initWithArray:[gu getFilteredCallDetails:i :filterCalls :filteredCallsDetails]]; 

              for (NSDictionary *answer in callDetail) 
                  NSRange r = [[answer objectForKey:@"answer"] rangeOfString:searchText options:NSCaseInsensitiveSearch];
                  if(r.location != NSNotFound)

                      [filterCalls addObject:call]; 
                      [filteredCallsDetails addObject:callDetail];                  

              

              i++;
        
    
       [self.tableView reloadData];

我正在使用 xCode 4.3.1 我知道我在这个函数中有无法解释的代码，但即使我注释它它仍然调用了两次，试图解决它但不能罚款 Y 很高兴得到帮助

【参考方案1】：

使用

 - (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar 

而不是

 - (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText

【讨论】：

好的，我将如何从搜索字段中获取文本？

@ShimonWiener searchBar.text 将保存您的搜索文本

感谢您的回答，但我需要在用户点击键盘时对我的数据数组执行搜索，所以我需要实现“textDidChange”，你知道它调用两次的方式吗？

看这个链接，可能是这样的问题jomnius.blogspot.in/2010/07/…

抱歉，你邀请我聊天是在晚上。我睡着了。