如何从 tableview 单元格中搜索数据?
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【中文标题】如何从 tableview 单元格中搜索数据?【英文标题】:How can I search data from tableview cell? 【发布时间】:2011-11-30 06:30:09 【问题描述】:我有一个UITableview
控制器,它代表获取的 XML 数据。为了表示这些数据,我使用了五个UILabel
。现在我必须在UITableview
的顶部添加一个searchbar
。所以我以编程方式添加了一个searchbar
。
现在我使用搜索定理来搜索来自UITableview
的数据。但它不起作用。我可以search
来自UItableview
的数据,当UItableviewcell
中只有一个文本没有任何UIlabel
或其他内容但在我的UItableviewcell
单元格中占用五个UILabel
这就是为什么@987654333 对我来说变得困难@来自UItableviewcell
的数据。为了便于理解,我附上了我如何在tableview
单元格中表示我的 XML 数据的代码。
这是我在UITableviewCell
...中的 XML 数据表示...
static NSString *MyIdentifier = @"MyIdentifier";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:MyIdentifier];
if (cell == nil)
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:MyIdentifier] autorelease];
cell.textLabel.font = [UIFont fontWithName:@"Helvetica" size:15.0];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"arrow.png"]];
cell.accessoryView = imageView;
cell.accessoryType = UITableViewCellSelectionStyleNone;
tableView.separatorColor = [UIColor clearColor];
tableView.separatorStyle = UITableViewCellSeparatorStyleSingleLine;
cellView = [[[UIView alloc] initWithFrame:CGRectMake(5,8,290, 120)] autorelease];
cellView.backgroundColor = [UIColor clearColor];
cellView.tag =10;
[cell.contentView addSubview:cellView];
imgView = [[UIImageView alloc] initWithFrame:CGRectMake(2, 40, 48, 48)];
imgView.image = [UIImage imageNamed:@"productbox.png"];
imgView.layer.borderColor = [UIColor blackColor].CGColor;
imgView.layer.borderWidth = 2.0;
imgView.tag = 5;
[cellView addSubview:imgView];
CGRect idLabelRect = CGRectMake(65, 0, 190, 18);
idLabel = [[[UILabel alloc] initWithFrame:idLabelRect] autorelease];
idLabel.textAlignment = UITextAlignmentLeft;
idLabel.textColor = [UIColor blackColor];
idLabel.font = [UIFont systemFontOfSize:12];
idLabel.backgroundColor = [UIColor clearColor];
idLabel.layer.borderColor = [UIColor grayColor].CGColor;
idLabel.tag = 0;
CGRect statusRect = CGRectMake(65, 22, 190, 22);
statusLabel = [[[UILabel alloc] initWithFrame:statusRect] autorelease];
statusLabel.textAlignment = UITextAlignmentLeft;
statusLabel.textColor = [UIColor blackColor];
statusLabel.font = [UIFont systemFontOfSize:12];
statusLabel.backgroundColor = [UIColor clearColor];
statusLabel.layer.borderColor = [UIColor grayColor].CGColor;
statusLabel.tag = 1;
CGRect orderDateRect = CGRectMake(65, 48, 190, 22);
orderDate = [[[UILabel alloc] initWithFrame:orderDateRect] autorelease];
orderDate.textAlignment = UITextAlignmentLeft;
orderDate.textColor = [UIColor blackColor];
orderDate.font = [UIFont systemFontOfSize:12];
orderDate.backgroundColor = [UIColor clearColor];
orderDate.layer.borderColor = [UIColor grayColor].CGColor;
orderDate.tag = 2;
CGRect byRect = CGRectMake(65, 75, 190, 22);
byLabel = [[[UILabel alloc] initWithFrame:byRect] autorelease];
byLabel.textAlignment = UITextAlignmentLeft;
byLabel.textColor = [UIColor blackColor];
byLabel.font = [UIFont systemFontOfSize:12];
byLabel.backgroundColor = [UIColor clearColor];
byLabel.layer.borderColor = [UIColor grayColor].CGColor;
byLabel.tag = 3;
CGRect totalRect = CGRectMake(65, 98, 190, 22);
totalLabel = [[[UILabel alloc] initWithFrame:totalRect] autorelease];
totalLabel.textAlignment = UITextAlignmentLeft;
totalLabel.textColor = [UIColor blackColor];
totalLabel.font = [UIFont systemFontOfSize:12];
totalLabel.backgroundColor = [UIColor clearColor];
totalLabel.layer.borderColor = [UIColor grayColor].CGColor;
totalLabel.tag = 4;
[cellView addSubview:idLabel];
[cellView addSubview:statusLabel];
[cellView addSubview:orderDate];
[cellView addSubview:byLabel];
[cellView addSubview:totalLabel];
if(searching == YES)
//[cell setText:[tableData objectAtIndex:indexPath.row]];
cell.textLabel.text = [tableData objectAtIndex:indexPath.row];
else
cellView = (UIView *)[cell.contentView viewWithTag:10];
idLabel = (UILabel *)[cellView viewWithTag:0];
statusLabel = (UILabel *)[cellView viewWithTag:1];
orderDate = (UILabel *)[cellView viewWithTag:2];
byLabel = (UILabel *)[cellView viewWithTag:3];
totalLabel = (UILabel *)[cellView viewWithTag:4];
imgView = (UIImageView *)[cellView viewWithTag:5];
if(pendingOrder == NO && todaysOrder == NO)
idLabel.text = [NSString stringWithFormat:@"Order Id: %@",[[records objectAtIndex:indexPath.section] objectAtIndex:0]];
statusLabel.text = [NSString stringWithFormat:@"Status: %@",[[records objectAtIndex:indexPath.section] objectAtIndex:1]];
orderDate.text = [NSString stringWithFormat:@"Date: %@",[[records objectAtIndex:indexPath.section] objectAtIndex:2]];
byLabel.text =[NSString stringWithFormat:@"By: %@",[[records objectAtIndex:indexPath.section] objectAtIndex:3]];
totalLabel.text =[NSString stringWithFormat:@"Total: %@",[[records objectAtIndex:indexPath.section] objectAtIndex:4]];
else if(pendingOrder == YES && todaysOrder == NO)
idLabel.text = [NSString stringWithFormat:@"Order Id: %@",[[pendingRecords objectAtIndex:indexPath.section] objectAtIndex:0]];
statusLabel.text = [NSString stringWithFormat:@"Status: %@",[[pendingRecords objectAtIndex:indexPath.section] objectAtIndex:1]];
orderDate.text = [NSString stringWithFormat:@"Date: %@",[[pendingRecords objectAtIndex:indexPath.section] objectAtIndex:2]];
byLabel.text =[NSString stringWithFormat:@"By: %@",[[pendingRecords objectAtIndex:indexPath.section] objectAtIndex:3]];
totalLabel.text =[NSString stringWithFormat:@"Total: %@",[[pendingRecords objectAtIndex:indexPath.section] objectAtIndex:4]];
return cell;
还有这个搜索委托.....
- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar
searching = YES;
// only show the status bar’s cancel button while in edit mode
sBar.showsCancelButton = YES;
sBar.autocorrectionType = UITextAutocorrectionTypeNo;
// flush the previous search content
[tableData removeAllObjects];
- (void)searchBarTextDidEndEditing:(UISearchBar *)searchBar
searching = NO;
sBar.showsCancelButton = NO;
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
[tableData removeAllObjects];// remove all data that belongs to previous search
if([searchText isEqualToString:@""] && searchText==nil)
[tableview reloadData];
return;
NSInteger counter = 0;
for(NSString *name in dataSource)
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc]init];
NSRange r = [name rangeOfString:searchText];
if(r.location != NSNotFound)
if(r.location== 0)//that is we are checking only the start of the names.
[tableData addObject:name];
counter++;
[pool release];
[tableview reloadData];
- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar
// if a valid search was entered but the user wanted to cancel, bring back the main list content
[tableData removeAllObjects];
searching = NO;
[tableData addObjectsFromArray:dataSource];
@try
searching = NO;
[tableview reloadData];
@catch(NSException *e)
[sBar resignFirstResponder];
sBar.text = @"";
// called when Search (in our case “Done”) button pressed
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar
[sBar resignFirstResponder];
为了了解更多帮助,我还附上了我的viewDidLoad
....
//Add the search bar
sBar = [[UISearchBar alloc]initWithFrame:CGRectMake(0,0,320,50)];
sBar.delegate = self;
searching = NO;
[self.view addSubview:sBar];
tableview.dataSource = self;
tableview.delegate = self;
//initialize the two arrays; datasource will be initialized and populated by appDelegate
searchData = [[NSMutableArray alloc] init];
tableData = [[NSMutableArray alloc] init];
[tableData addObjectsFromArray:dataSource];//on launch it should display all the records
编辑
这是我编辑的numberOfSectionsInTableView
和numberOfRowsInSection
的部分...
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
if(searching == YES)
searching = NO;
sectionCount = [tableData count];
else
if(pendingOrder == NO && todaysOrder == NO)
sectionCount = [records count];
NSLog(@"section cout: %d",sectionCount);
else if(pendingOrder == YES && todaysOrder == NO)
//Total pending order counting
sectionCount = [pendingRecords count];
NSLog(@"section cout for pending: %d",sectionCount);
else if(pendingOrder == NO && todaysOrder == YES)
NSLog(@"todays order number counting");
return sectionCount;
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
return 1;
【问题讨论】:
【参考方案1】:试试这个:-
copylistofItem 是 NSMutableArray 复制符合搜索栏条件的数据。
- (void) searchBarSearchButtonClicked:(UISearchBar *)theSearchBar
NSString *searchText = searchBar.text;
NSMutableArray *searchArray = [[NSMutableArray alloc] init];
int i=0
for (NSString *str in [records objectAtIndex:indexPath.i] objectAtIndex:0])
[searchArray addObject:str];
i++;
for (NSString *sTemp in searchArray)
NSString *txtToSearch =[[NSString alloc] initWithString:[sTemp substringWithRange:NSMakeRange(0,[searchText length])]];
if([[txtToSearch lowercaseString] isEqualToString:[searchText lowercaseString]])
[copyListOfItems addObject:sTemp];
[searchArray release];
searchArray = nil;
我们还想知道你在 numberOfSections tableView Delegate 中写了什么。
【讨论】:
if(searching == YES) //[cell setText:[tableData objectAtIndex:indexPath.row]]; cell.textLabel.text = [tableData objectAtIndex:indexPath.row];我认为你必须在调用 search_done 函数时更改这部分,用 copylistOfItems 数组重新加载 tableview。 我怎样才能在- (void) searchBarSearchButtonClicked:(UISearchBar *)theSearchBar
中获得[records objectAtIndex:indexPath.i] objectAtIndex:0]
,因为我需要indexPath 值。
Record 是您在头文件中初始化的二维数组。当搜索未完成时,从记录数组中加载 tableview 搜索完成时,它将使用 copylistofitems 数组填充 tableview,但该数组将只给出所有部分的记录数组中的索引 0 行数据。你必须为所有索引工作就像 copylistofitems 一维数组一样。以上是关于如何从 tableview 单元格中搜索数据?的主要内容,如果未能解决你的问题,请参考以下文章
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