ios 中使用 Search Display Controller 来对 UITableView 进行前台查询

最新推荐文章于 2017-10-02 16:37:32 发布

remote_roamer

最新推荐文章于 2017-10-02 16:37:32 发布

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使用 Search Display Controller 控件
实现
UISearchDisplayDelegate
定义全部的table的数据和过滤后的数据，以及过滤标记

@property (strong, nonatomic) NSArray *arOriginal;

@property (strong, nonatomic) NSArray *arFiltered;

@property (readwrite, nonatomic) BOOL isSearching;

在过滤输入框激活调用中实现

- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString {
    if(self.searchDisplayController.searchBar.text.length>0) {
        self.isSearching=YES;
        NSString *strSearchText = self.searchDisplayController.searchBar.text;
        NSMutableArray *ar=[NSMutableArray array];
        // correctly working ! Thanx for watching video !
        for (NSDictionary *d in self.arOriginal) {
            NSString *strData = [d valueForKey:@"name"];
            if([strData rangeOfString:strSearchText].length>0) {
                [ar addObject:d];
            }
        }
        self.arFiltered=[NSArray arrayWithArray:ar];
    } else {
        self.isSearching=NO;
    }
    return YES;
}

在显示每个cell的时候实现

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[NSBundle mainBundle] loadNibNamed:@"CCell" owner:self options:nil] objectAtIndex:0];
    }
    NSDictionary *dToAccess = (self.isSearching)?[self.arFiltered objectAtIndex:indexPath.row]:[self.arOriginal objectAtIndex:indexPath.row];
    
    [(UILabel*)[cell viewWithTag:1] setText:[dToAccess valueForKey:@"name"]];
    [(UILabel*)[cell viewWithTag:2] setText:[dToAccess valueForKey:@"price"]];
    return cell;
}