ios - 为 UITableView 的不同部分设置按钮标签

Question

我列出了来自 Web 服务的联系人并将其显示在联系人“分段”tableView 中，如屏幕截图所示。



问题是我为 A 部分和 S 部分的第一行的复选框获得了相同的标记值。我已经对一个数组进行了排序并显示在索引表 View 中。无论显示的部分数量如何，如何根据 indexPath.row 获取不同的标记值。这是我尝试过的

    In cellForRowAtIndexPath: 
     UIButton *checkBox;
        if(UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
        {
            checkBox = [[UIButton alloc]initWithFrame:CGRectMake(7, 8, 30, 30)];
        }
        else
        {
            checkBox = [[UIButton alloc]initWithFrame:CGRectMake(15, 13, 30, 30)];
        }

        //int cnt = 0;
        // for (int i = indexPath.section - 1; i > 0 ; i--)
        // {
        //     cnt += [[objectsForCharacters objectForKey:[arrayOfCharacters objectAtIndex:i]] count]; //arrayOfCharachters has char 'A' to 'Z'
        // }

        //checkBox.tag = cnt + indexPath.row;

        [checkBox setImage:[UIImage imageNamed:@"checkBox.png"] forState:UIControlStateNormal];
        [checkBox addTarget:self action:@selector(checkBoxClicked:) forControlEvents:UIControlEventTouchUpInside];
        [checkBox setTag:indexPath.row];
        [cell.contentView addSubview:checkBox];
        return cell;
    }

    -(void)checkBoxClicked:(id)sender
    {

        CGPoint buttonPosition = [sender convertPoint:CGPointZero toView:self.tableViewContact];
        NSIndexPath *indexPath = [self.tableViewContact indexPathForRowAtPoint:buttonPosition];
        UIButton *tappedButton = (UIButton*)sender;
        NSLog(@"Tag number = %d", [sender tag]);

        if([tappedButton.currentImage isEqual:[UIImage imageNamed:@"checkBox.png"]])
        {
            [sender  setImage:[UIImage imageNamed: @"checkBoxMarked.png"] forState:UIControlStateNormal];
            if(indexPath != Nil)
            {
                NSString *finalIntId = [mutableArrayOfIds objectAtIndex:indexPath.row]; // store check box ids in mutableArrayOfIds
                NSLog(@"Tagged checked button id = %@", finalIntId);
                [arrayOfIds addObject:finalIntId];
            }
            //NSString *finalIntId = [mutableArrayOfIds objectAtIndex:tappedButton.tag];
            //NSString *finalIntId = [mutableArrayOfIds objectAtIndex:indexPath.row];
        }
        else
        {
            [sender setImage:[UIImage imageNamed:@"checkBox.png"]forState:UIControlStateNormal];
            NSLog(@"UnChecked");
            //[arrayOfIds removeObjectAtIndex:tappedButton.tag];

        }
    }

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {

    if ([arrayOfCharacters count] == 0)
    {
        return @"";
    }

    return [NSString stringWithFormat:@"%@", [arrayOfCharacters objectAtIndex:section]];
}

- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView
{
     NSArray *toBeReturned = [NSArray arrayWithArray:
                                 [@"A|B|C|D|E|F|G|H|I|J|K|L|M|N|O|P|Q|R|S|T|U|V|W|X|Y|Z|#"
                                  componentsSeparatedByString:@"|"]];

      return toBeReturned;

}

- (NSInteger)tableView:(UITableView *)tableView sectionForSectionIndexTitle:(NSString *)title atIndex:(NSInteger)index
{


        NSInteger count = 0;

        for (NSString *character in arrayOfCharacters) {

            if ([character isEqualToString:title]) {
                return count;
            }

            count ++;
        }

        return 0;


}



- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{

        return [arrayOfCharacters count];
        //return 1;

}



- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{


        //return [mutableArray count];
        return [[objectsForCharacters objectForKey:[arrayOfCharacters objectAtIndex:section]] count];

}

Answer 1

您正在为具有相同行的所有部分设置相同的标记值。
indexPath 有两个属性，{section,row}。

假设 A 部分有两行，

for row1 -> indexPath.section=0, indexPath.row=0;
for row2->  indexPath.section=0, indexPath.row=1;

假设 S 部分有两行，

for row1 -> indexPath.section=1, indexPath.row=0;
for row2->  indexPath.section=1, indexPath.row=1;

因此，对于 A 部分的 row1 和 S 部分的 row1，您正在设置相同的标记值，即 0。这是您的问题。

尝试设置标签值，如下所示。

button.tag = indexPath.section*1000 +indexPath.row;

检索部分和行时，

NSInteger section = (button.tag)/1000;
NSInteger row = (button.tag)%1000;