iphone - 如何从表格 View 单元格中搜索数据？

Question

我有一个 UITableview Controller ，它表示获取的 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 顶部添加一个 searchbar。因此，我以编程方式添加了一个搜索栏。

现在我已经使用搜索定理从 UITableview 中搜索数据。但它不起作用。当 UItableviewcell 中只有一个文本而没有任何 UIlabel 或其他内容但在我的UItableviewcell 单元格占用了五个 UILabel，这就是为什么我很难从 UItableviewcell 中搜索数据。为了便于理解，我附上了我的代码，如何在 tableview 单元格中表示 XML 数据。

这是我在 UITableviewCell 中的 XML 数据表示形式...

 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;
}

还有这个搜索代表......

- (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];
}

为了获得更多帮助，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 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;
}

Answer 1

试试这个:-

copylistofItem 是 NSMutableArray，复制与搜索栏条件匹配的数据。

- (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;

}

我们还想知道您在 numberOfSections tableView Delegate 中写入的内容。