Iphone 单选复选标记

我目前正在开发一个

UITableView

，其中包含带有复选标记的可供选择的项目。 问题是我需要对一次选择的项目数量进行限制

例如：

没有洋葱，没有盐，有牛奶，没有桔子

如本例所示，我需要一个限制，以便用户只能选择一个项目

当前代码：

-(void)checkButtonPressed:(id)sender event:(id)event {
    NSSet *touches = [event allTouches];
    UITouch *touch = [touches anyObject];
    CGPoint currentTouchPosition = [touch locationInView:self.myTableView];
    indexP = [self.myTableView indexPathForRowAtPoint: currentTouchPosition];

    NSMutableDictionary *item = [[NSMutableDictionary alloc] init];
    //MasterCell *cell = [self.tableView dequeueReusableCellWithIdentifier:@"MasterCell"];
    item = [arrayData objectAtIndex:indexP.row];

    if (indexP != nil) {
        [self tableView: self.myTableView accessoryButtonTappedForRowWithIndexPath:indexP];
    }

    [self.myTableView reloadData]; 
}

- (void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath {
    NSMutableDictionary *item = [arrayData objectAtIndex:indexPath.row];

    BOOL checked = [[item objectForKey:@"checked"] boolValue];

    [item setObject:[NSNumber numberWithBool:!checked] forKey:@"checked"];

    UITableViewCell *cell = [item objectForKey:@"cell"];
    UIButton *button = (UIButton *)cell.accessoryView;

    UIImage *newImage = (checked) ? [UIImage imageNamed:@"unchecked.png"] : [UIImage imageNamed:@"checked.png"];
    [button setBackgroundImage:newImage forState:UIControlStateNormal];

    NSLog(@"accessoryButtonTappedForRowWithIndexPath____");
}

My cellForRowAtIndexPath:

- (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];
    }

    NSMutableDictionary *item = [arrayData objectAtIndex:indexPath.row];
    UILabel *nomeLabel = (UILabel *)[cell viewWithTag:2];

    UIButton *btnCheck = (UIButton *)[cell viewWithTag:3];
    BOOL checked = [[item objectForKey:@"checked"] boolValue];
    UIImage *image = (checked) ? [UIImage imageNamed:@"checked.png"] : [UIImage imageNamed:@"unchecked.png"];
    [btnCheck setBackgroundImage:image forState:UIControlStateNormal];

    nomeLabel.text = [item valueForKey:@"nome"];
    nomeLabel.textColor = [UIColor blackColor];
    [btnCheck addTarget:self action:@selector(checkButtonPressed:event:) forControlEvents:UIControlEventTouchUpInside];

    return cell;
}

---

提前感谢，并为我糟糕的英语感到抱歉，请不要否决投票，只要问问你们是否有任何疑问，我随时都会回答

基本上，对于这种业务逻辑，您必须自己编写代码。当使用表视图作为基本单选按钮时，强制执行单一选择要求的唯一方法是编写代码，以处理用户试图按照系统要求的方式选择第二项的情况：

• 允许多个选择（此处不是这种情况，但在某些情况下可能会）
• 删除与此不兼容的所有其他检查，检查所选项目，并告诉表视图刷新刚刚更改的所有行
• 以某种方式（眨眼、提醒、声音）向用户显示错误——如果允许直接操作，这几乎不是一个好主意

---

基本上，对于这种业务逻辑，您必须自己编写代码。当使用表视图作为基本单选按钮时，强制执行单一选择要求的唯一方法是编写代码，以处理用户试图按照系统要求的方式选择第二项的情况：
• 允许多个选择（此处不是这种情况，但在某些情况下可能会）
• 删除与此不兼容的所有其他检查，检查所选项目，并告诉表视图刷新刚刚更改的所有行
• 以某种方式（眨眼、提醒、声音）向用户显示错误——如果允许直接操作，这几乎不是一个好主意

---

像这样尝试可能会对您有所帮助，这里lastIndexPath是在.h文件中声明的

nsindepath

变量

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

        UITableViewCell* Cell = [tableView cellForRowAtIndexPath:indexPath]; 
        int new = [indexPath row]; 
        int old = (lastIndexPath != nil) ? [lastIndexPath row] : -1; 

        if(new != old) 
        { 
            Cell.accessoryType = UITableViewCellAccessoryCheckmark; 
            UITableViewCell* oldCell = [tableView cellForRowAtIndexPath:lastIndexPath]; 
            oldCell.accessoryType = UITableViewCellAccessoryNone;
           lastIndexPath = indexPath; 

        } 

    }   

---

尝试这样做可能会对您有所帮助，这里lastIndexPath是在.h文件中声明的

nsindepath

变量

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

        UITableViewCell* Cell = [tableView cellForRowAtIndexPath:indexPath]; 
        int new = [indexPath row]; 
        int old = (lastIndexPath != nil) ? [lastIndexPath row] : -1; 

        if(new != old) 
        { 
            Cell.accessoryType = UITableViewCellAccessoryCheckmark; 
            UITableViewCell* oldCell = [tableView cellForRowAtIndexPath:lastIndexPath]; 
            oldCell.accessoryType = UITableViewCellAccessoryNone;
           lastIndexPath = indexPath; 

        } 

    }   

试试这个：
.h文件

@property(nonatomic, retain) NSIndexPath *lastIndexPath;

.m文件

int oldRow, newRow;

表格方法：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CustomCellIdentifier = @"customCell";
    customCell *cell = (customCell *)[tableView dequeueReusableCellWithIdentifier: CustomCellIdentifier];
    if (cell == nil)
    {
        NSArray *nib;
        nib= [[NSBundle mainBundle] loadNibNamed:@"customCell" owner:self options:nil];
        for (id oneObject in nib)
            if ([oneObject isKindOfClass:[customCell class]])
                cell = (customCell *)oneObject;

        newRow = [indexPath row];
        oldRow = [[self lastIndexPath] row];


        cell.accessibilityViewIsModal = (newRow == oldRow && lastIndexPath != nil) ? NO : YES;

        if(cell.accessibilityViewIsModal == NO)
            cell.imgCheck.image = [UIImage imageNamed:@"Checkbox_Checked_New.png"];
        else
            cell.imgCheck.image = [UIImage imageNamed:@"Checkbox_Unchecked_New.png"];

        return cell;
    }
}

DidSelect:：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    newRow = [indexPath row];
    oldRow = [[self lastIndexPath] row];

    //Check Mark Feature
    if (newRow != oldRow)
    {
        customCell *newCell = (customCell *)[tableView cellForRowAtIndexPath:indexPath];
        newCell.imgCheck.image = [UIImage imageNamed:@"Checkbox_Checked_New.png"];

        customCell *oldCell = (customCell *)[tableView cellForRowAtIndexPath:lastIndexPath];
        oldCell.imgCheck.image = [UIImage imageNamed:@"Checkbox_Unchecked_New.png"];

        [self setLastIndexPath:indexPath];
    }
    else
    {
        customCell *newCell = (customCell *)[tableView cellForRowAtIndexPath:indexPath];
        newCell.imgCheck.image = [UIImage imageNamed:@"Checkbox_Checked_New.png"];

        [self setLastIndexPath:indexPath];
    }
}

试试这个：
.h文件

@property(nonatomic, retain) NSIndexPath *lastIndexPath;

.m文件

int oldRow, newRow;

表格方法：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CustomCellIdentifier = @"customCell";
    customCell *cell = (customCell *)[tableView dequeueReusableCellWithIdentifier: CustomCellIdentifier];
    if (cell == nil)
    {
        NSArray *nib;
        nib= [[NSBundle mainBundle] loadNibNamed:@"customCell" owner:self options:nil];
        for (id oneObject in nib)
            if ([oneObject isKindOfClass:[customCell class]])
                cell = (customCell *)oneObject;

        newRow = [indexPath row];
        oldRow = [[self lastIndexPath] row];


        cell.accessibilityViewIsModal = (newRow == oldRow && lastIndexPath != nil) ? NO : YES;

        if(cell.accessibilityViewIsModal == NO)
            cell.imgCheck.image = [UIImage imageNamed:@"Checkbox_Checked_New.png"];
        else
            cell.imgCheck.image = [UIImage imageNamed:@"Checkbox_Unchecked_New.png"];

        return cell;
    }
}

DidSelect:：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    newRow = [indexPath row];
    oldRow = [[self lastIndexPath] row];

    //Check Mark Feature
    if (newRow != oldRow)
    {
        customCell *newCell = (customCell *)[tableView cellForRowAtIndexPath:indexPath];
        newCell.imgCheck.image = [UIImage imageNamed:@"Checkbox_Checked_New.png"];

        customCell *oldCell = (customCell *)[tableView cellForRowAtIndexPath:lastIndexPath];
        oldCell.imgCheck.image = [UIImage imageNamed:@"Checkbox_Unchecked_New.png"];

        [self setLastIndexPath:indexPath];
    }
    else
    {
        customCell *newCell = (customCell *)[tableView cellForRowAtIndexPath:indexPath];
        newCell.imgCheck.image = [UIImage imageNamed:@"Checkbox_Checked_New.png"];

        [self setLastIndexPath:indexPath];
    }
}

---

你需要什么？？单选或多选表格列表项？我已将自定义单元格与选中未选中的图像共享example@Bruno你得到答案了吗？你需要什么？？单选或多选表格列表项？我已将自定义单元格与选中未选中的图像共享example@Bruno你们得到答案了吗？我在这里取了带有imageview的自定义单元格，并设置了选中和未选中的图像。我在这里取了带有imageview的自定义单元格，并设置了选中和未选中的图像。