Question

我在表格视图中创建了一个具有搜索栏的自定义单元格。用户输入的文本将用于搜索SQLite数据库和表视图中显示的结果。我现在的问题是，如果我使用自定义单元格，搜索结果不会显示在表格视图中，但是当我使用默认单元格时，搜索结果会起作用。例如，在下面的代码中，如果我使用[cell setText：currentSubLocality];它将显示结果，但如果我使用cell.lblG.text = currentLocation;它将不会显示结果。请帮助，一直在努力2天。感谢

#import "CustomViewController.h"
#import "FMDBDataAccess.h"
#import "locationCode.h"
#import "CustomCell.h"
@interface CustomViewController ()

@end

@implementation CustomViewController{
    NSMutableArray *searchResults;}

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{

    return [searchResults count];

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath    
    CustomCell *cell = [tableView dequeueReusableCellWithIdentifier:@"vvv"];

    if (cell==nil){
        cell = [[CustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"vvv"];

    }

    if (tableView == self.searchDisplayController.searchResultsTableView)
    {
        locationCode *code = [[locationCode alloc] init];
        code= [searchResults objectAtIndex:indexPath.row];
        NSString *currentLocation = code.location;
        NSString *currentSubLocality = code.subLocality

        //[cell setText:currentSubLocality];
        cell.lblG.text = currentLocation;
        cell.lblL.text = currentSubLocality;
    }


    return cell;

}


- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope
{
    NSString *databasePath = [[NSBundle mainBundle] pathForResource:@"spr" ofType:@"sqlite"];
    FMDatabase *database = [FMDatabase databaseWithPath:databasePath];

    [database open];
    searchResults = [[NSMutableArray alloc] initWithObjects:nil count:0];

    NSString *query = [NSString stringWithFormat:@"select * from Locations where locationCode like '%@%%'", searchText];

    FMResultSet *results = [database executeQuery:query];

    while([results next]) {

        locationCode *code = [[locationCode alloc] init];
        code.code = [results stringForColumn:@"locationcode"];
        code.subLocality= [results stringForColumn:@"sublocality"];
        code.longitude= [results stringForColumn:@"longitude"];
        code.latitude= [results stringForColumn:@"latitude"];

        [searchResults addObject:code];
    }

    [database close];

}

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

    return YES;
}

@end

Answer 1

试试这个会起作用。将以下代码粘贴到cellforrowatindexpath方法中，不要忘记在属性检查器中设置TableViewCell“Identifier”

static NSString *CellIdentifier = @"Cell";
    CustomCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell==nil) {
        cell = [[CustomCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }

Answer 2

我通过添加tableview作为插座解决了这个问题。然后更改以下行

CustomCell *cell = [tableView dequeueReusableCellWithIdentifier:@"vvv"];

到

CustomCell *cell = [customTableView dequeueReusableCellWithIdentifier:@"vvv"];

XCode中的自定义单元格不显示值

2 个答案: