Question

我是iOS新手我在tableview中创建动态按钮我在按钮上设置了一个图像以供检查和取消选中我要做的是当我点击（或检查）按钮时，indexpath行上的数据将添加到我的数组中。如果我取消选择它，数据将从我的数组中删除。请帮帮我

-(void)btnForCheckBoxClicked:(id)sender
{

UIButton *tappedButton = (UIButton*)sender;

indexForCheckBox= [sender tag];


if([tappedButton.currentImage isEqual:[UIImage imageNamed:@"checkbox_unchecked.png"]]) 
{

    [sender  setImage:[UIImage imageNamed: @"checkbox_checked.png"] forState:UIControlStateNormal];
    strinForCheckBox= [ApplicationDelegate.ArrayForSearchResults objectAtIndex:indexForCheckBox];
    [arrForCheckBox addObject:strinForCheckBox];
    NSLog(@"Sender Tag When Add %d", indexForCheckBox);
    NSLog(@"Array Count Check Box %d",[arrForCheckBox count]);

}

else
{

        [sender setImage:[UIImage imageNamed:@"checkbox_unchecked.png"]forState:UIControlStateNormal];
        [arrForCheckBox removeObjectAtIndex:indexForCheckBox];
        NSLog(@"Sender Tag After Remove %d", indexForCheckBox);
        NSLog(@"Array Count Uncheck Box %d",[arrForCheckBox count]);


   }


}

Answer 1

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

    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];
    }

    if ([selectedRowsArray containsObject:[contentArray objectAtIndex:indexPath.row]) {
        cell.imageView.image = [UIImage imageNamed:@"checked.png"];
    }
    else {
       cell.imageView.image = [UIImage imageNamed:@"unchecked.png"];
    }
    UITapGestureRecogniser *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleChecking:)
    [cell.imageView addGestureRecognizer:tap];
    [tap release];

    cell.textLabel.text = [contentArray objectAtIndex];
    return cell;
}

- (void) handleChecking:(UITapGestureRecognizer *)tapRecognizer {
    CGPoint tapLocation = [tapRecognizer locationInView:self.tableView];
    NSIndexPath *tappedIndexPath = [self.tableView indexPathForRowAtPoint:tapLocation];

    if (selectedRowsArray containsObject:[contentArray objectAtIndex:tappedIndexPath.row]) {
        [selectedRowsArray removeObject:[contentArray objectAtIndex:tappedIndexPath.row]];
    }
    else {
        [selectedRowsArray addObject:[contentArray objectAtIndex:tappedIndexPath.row]];
    }
    [self.tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:tappedIndexPath] withRowAnimation: UITableViewRowAnimationFade];
}

Answer 2

我认为这个问题已经回答了一段时间了！先检查一下然后告诉我们这是不是您要找的？

How to add checkboxes to UITableViewCell??

image http://img208.yfrog.com/img208/6119/screenshotkmr.png

Answer 3

您可以在按钮点击方法中添加此项。

首先设置Bool值，在一次单击时设置为yes，否则在第二次单击时以及第一次单击时使用array addobject属性和其他单击removeobject属性在数组中添加该索引值。

-(void)list
{

if(isCheck==YES)
{
    //add array object  here
    isCheck=NO;
}
else if(isCheck==NO)
{
  //remove array object here
   isCheck=YES;
}

}

Answer 4

我找到了另一种方式。从@The Saad提取的代码并且，我刚刚使用键/值对修改为有用的代码，如下面的代码 -

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

    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];
    }

    if ([[selectedRowsArray objectAtIndex:indexPath.row] containsObject:@"YES"])
        cell.imageView.image = [UIImage imageNamed:@"checked.png"];
    else
       cell.imageView.image = [UIImage imageNamed:@"unchecked.png"];

    UITapGestureRecogniser *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleChecking:)
    [cell.imageView addGestureRecognizer:tap];
    [tap release];

    cell.textLabel.text = [contentArray objectAtIndex];
    return cell;
}

- (void) handleChecking:(UITapGestureRecognizer *)tapRecognizer {
    CGPoint tapLocation = [tapRecognizer locationInView:self.tableView];
    NSIndexPath *tappedIndexPath = [self.tableView indexPathForRowAtPoint:tapLocation];

    if ([[selectedRowsArray objectAtIndex:tappedIndexPath.row] containsObject:@"YES"])
        [selectedRowsArray replaceObjectAtIndex:tappedIndexPath.row withObject:[NSSet setWithObject:@"NO"]];
    else
        [selectedRowsArray replaceObjectAtIndex:tappedIndexPath.row withObject:[NSSet setWithObject:@"YES"]];

    [self.tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:tappedIndexPath] withRowAnimation: UITableViewRowAnimationFade];
}

添加selectedRowsArray的对象，如下所示，计算self.tableView的行数。因此，您需要添加bool值，如下所示

for ( int i = 0; i < tableViewRowCount; i++ ) { // tableViewRowCount would be your tableView's row count
    ....
    ....
    ....
    [selectedRowsArray addObject:[NSSet setWithObject:@"NO"]];
    ....
    ....
}

希望这有帮助！干杯！

<强>更新

使用更新后的代码，您无需保持NSMutableDictionary的键/值对过度使用。 NSSet为您提供了更好的方法。

UITableview iPhone中的多个复选框

4 个答案: