在UITableView中添加数组首尾处的UIbutoton

Question

问题：我要在UITableView中添加UIButton，并且只加在第一个和最后一个数组上，不知道应该怎么实现？我知道可以用tableFooterView添加按钮，但是不知道怎么样实现添加到指定数组位置中。请多多指教，谢谢

我的代码：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath   *)indexPath
{ 

    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }

    //Adding a UIButton in last row

    NSInteger lastSectionIndex = [editTable numberOfSections] - 1;
    NSLog(@"lastSectionIndex:%d",lastSectionIndex);

    // Then grab the number of rows in the last section
    NSInteger lastRowIndex = [editTable numberOfRowsInSection:lastSectionIndex] - 1;
    NSLog(@"lastRowIndex:%d",lastRowIndex);

    // Now just construct the index path
    NSIndexPath *pathToLastRow = [NSIndexPath indexPathForRow:lastRowIndex inSection:lastSectionIndex];
    NSLog(@"last index:%@",pathToLastRow);

    if (pathToLastRow.row == lastRowIndex) 
    {
        NSLog(@"row enters");

        checkButton1 = [UIButton buttonWithType:UIButtonTypeCustom];
        [checkButton1 setFrame:CGRectMake(200, 0, 168, 168)];
        [checkButton1 addTarget:self
                         action:@selector(customActionPressed:)
               forControlEvents:UIControlEventTouchDown];
        [checkButton1 setBackgroundImage:[[UIImage imageNamed:@"Up Arrow.jpg"] stretchableImageWithLeftCapWidth:0.0 topCapHeight:0.0] forState:UIControlStateNormal];
        editTable.tableFooterView = checkButton1;
        [cell addSubview:checkButton1]; 
    }

现在我可以在tableview的每个单元里面接受到Button。

Answer 1

先修改if条件句,

if ((lastSectionIndex == indexPath.section && lastRowIndex == indexPath.row ) || (indexPath.section == 0 && indexPath.row == 0 ))
{

然后就会这样：

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
        UIButton *checkButton1 = [UIButton buttonWithType:UIButtonTypeCustom];
        checkButton1.tag = 100;//not recommended, I would suggest to use custom UITableViewCell class and add this button as subview inside its init method
        [checkButton1 setFrame:CGRectMake(200, 0, 168, 168)];
        [checkButton1 addTarget:self
                     action:@selector(customActionPressed:)
           forControlEvents:UIControlEventTouchDown];
        [checkButton1 setBackgroundImage:[[UIImage imageNamed:@"Up Arrow.jpg"] stretchableImageWithLeftCapWidth:0.0 topCapHeight:0.0] forState:UIControlStateNormal];
        [cell addSubview:checkButton1]; 
    }

   //Adding a UIButton in last row
   NSInteger lastSectionIndex = [editTable numberOfSections] - 1;
   NSLog(@"lastSectionIndex:%d",lastSectionIndex);

   // Then grab the number of rows in the last section
   NSInteger lastRowIndex = [editTable numberOfRowsInSection:lastSectionIndex] - 1;
   NSLog(@"lastRowIndex:%d",lastRowIndex);

   // Now just construct the index path
   NSIndexPath *pathToLastRow = [NSIndexPath indexPathForRow:lastRowIndex inSection:lastSectionIndex];
   NSLog(@"last index:%@",pathToLastRow);

   UIButton *checkButton1 = (UIButton *)[cell viewWithTag:100];//not recommended, I would suggest to use custom UITableViewCell class and add this button as subview inside its init method
   if ((lastSectionIndex == indexPath.section && lastRowIndex == indexPath.row ) || (indexPath.section == 0 && indexPath.row == 0 ))
    {
       checkButton1.hidden = NO;
    } else {
       checkButton1.hidden = YES;
    }