搜索后TableView中的错误单元格值

时间:2013-11-10 07:59:30

标签: ios uitableview searchdisplaycontroller

大家好

我的项目中有两个数组

- (void)viewDidLoad
    {
        [super viewDidLoad];
        deviceName = [[NSArray alloc] initWithObjects: @"iPhone", @"Galaxy", @"iPad", @"iMac", @"HTC One", nil];
        companyName = [[NSArray alloc] initWithObjects:@"Apple", @"Samsung", @"Apple", @"Apple", @"HTC", nil];
    }

我正在使用此代码修改单元格..

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    if (tableView == self.searchDisplayController.searchResultsTableView) {
        return [searchResult count];
    } else {
        return [deviceName count];
    }
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *identifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];

    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier] autorelease];
    }

        if ([self.searchDisplayController isActive]) {

            NSString *name = [searchResult objectAtIndex:indexPath.row];
            NSString *company = [companyName objectAtIndex:indexPath.row];
            cell.textLabel.text = [NSString stringWithFormat:@"%@ - %@", name, company];

        } else {

            NSString *name = [deviceName objectAtIndex:indexPath.row];
            NSString *company = [companyName objectAtIndex:indexPath.row];
            cell.textLabel.text = [NSString stringWithFormat:@"%@ - %@", name, company];
        }
    return cell;
}

我正在使用此代码进行搜索..

#pragma mark - UISearchDisplayController delegate methods

- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope
{
    NSPredicate *resultPredicate = [NSPredicate
                                    predicateWithFormat:@"SELF contains[cd] %@",
                                    searchText];
    [searchResult release];
    searchResult = [[deviceName filteredArrayUsingPredicate:resultPredicate]retain];
}

-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
    [self filterContentForSearchText:searchString
                               scope:[[self.searchDisplayController.searchBar scopeButtonTitles]
                                      objectAtIndex:[self.searchDisplayController.searchBar
                                                     selectedScopeButtonIndex]]];
    return YES;
}

一开始,单元格就像这样

cell1- iPhone - Apple

cell2- Galaxy - Samaung

...

当我搜索'htc'时,搜索工作正常,但像这样的单元格

cell1- HTC One - Apple

...

我该怎么做才能解决这个问题?

1 个答案:

答案 0 :(得分:2)

您有两个单独的数组作为表视图数据源:

deviceName  = [ "iPhone", "Galaxy", "iPad", "iMac", "HTC One"]
companyName = [ "Apple", "Samsung", "Apple", "Apple", "HTC" ]

然后在示例

中从deviceName创建一个过滤后的数组
searchResult = [ "HTC One"]

cellForRowAtIndexPath中,您使用过滤后的数组和原始数组companyName,这就是显示“HTC One - Apple”的原因。

要解决此问题,您不应使用两个单独的数组作为数据源, 但是一个单个数组字典,其中每个字典包含设备名称和 公司名称:

allDevices = @[
            @{@"name": @"iPhone", @"company": @"Apple"},
            @{@"name": @"Galaxy", @"company": @"Samsung"},
            ...
            ];

您可以像这样过滤数组:

NSPredicate *resultPredicate = [NSPredicate
                                predicateWithFormat:@"name CONTAINS[cd] %@",
                                searchText];
filteredDevices = [allDevices filteredArrayUsingPredicate:resultPredicate];

这样filteredDevices也是一个字典数组,包含名称​​和 公司为每个设备。然后,在cellForRowAtIndexPath中,您只需执行

即可
NSDictionary *device;
if ([self.searchDisplayController isActive]) {
    device = filteredDevices[indexPath.row];
} else {
    device = allDevices[indexPath.row];
}
NSString *name = device[@"name"];
NSString *company = device[@"company"];
cell.textLabel.text = [NSString stringWithFormat:@"%@ - %@", name, company];

备注:我省略了所有保留/释放呼叫,因为我通常使用ARC。