iphone - iOS:点击 TableView 中行的计数器

Question

我正在开发 tableView，其中每行都必须显示点击计数器和行号。初始化应用程序时，每个单元格的初始点击计数器值必须为 0。然后，每当用户单击单元格时，就增加单元格内的点击计数器值。

我有 26 个固定行。我已获取如附图所示的 tableData.plist 文件。

我正在使用 plist 初始化 self.dataArray 。

现在我想在 didSelectRowAtIndexPath 委托(delegate)方法中实现，如果点击任何行，该行的点击计数器应该增加。

- (void)viewDidLoad {
    [super viewDidLoad];

    NSString *path = [[NSBundle mainBundle] pathForResource:@"tableData" ofType:@"plist"];
    self.dataArray = [NSMutableArray arrayWithContentsOfFile:path];//array initialized with plist
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [self.dataArray count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *kCustomCellID = @"MyCellID";
    UILabel *label1 = [[UILabel alloc] initWithFrame:CGRectMake(160.0f, 2.0f, 30.0f, 20.0f)];//label for rowid
    UILabel *label2 = [[UILabel alloc] initWithFrame:CGRectMake(160.0f, 24.0f, 30.0f, 30.0f)];//label for counter
    label2.textColor = [UIColor grayColor];
    UITableViewCell *cell = (UITableViewCell *)[tableView dequeueReusableCellWithIdentifier:kCustomCellID];
    if (cell == nil)
    {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:kCustomCellID] autorelease];
        cell.selectionStyle = UITableViewCellSelectionStyleNone;
    }
    if([self.dataArray count]>indexPath.row)
    {
        label1.text = [[self.dataArray objectAtIndex:indexPath.row] objectForKey:@"Lable1"];
        label2.text =[[self.dataArray objectAtIndex:indexPath.row] objectForKey:@"Lable2"]; 
    }
    else {
        label1.text = @"";
        label2.text =@"";
    }
    [cell.contentView addSubview:label1];
    [cell.contentView addSubview:label2];
    [label1 release];
    [label2 release];
    return cell;
}


#pragma mark -
#pragma mark Table view delegate

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
   //implementation for row counter incrementer.
}

Answer 1

试试这个。

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
   //take dictionary object from dataArray at selected index
   //take Lable2 value as a string and convert it into integer and increment the integer value
   //now convert this incremented integer value into string
   //now save it new string in Lable2 for the object dictionary and add this dict object into dataArray at selected index
    NSMutableDictionary * tempDict = [self.dataArray objectAtIndex:indexPath.row];
    int tempLableInt = [[tempDict objectForKey:@"Lable2"] intValue];
    tempLableInt = tempLableInt +1;
    [tempDict setObject:[NSString stringWithFormat:@"%d",tempLableInt] forKey:@"Lable2"];
    [self.dataArray replaceObjectAtIndex:indexPath.row withObject:tempDict];
    [tableView reloadData];
}