单击 UITableCell 时确定 UISwitch 的状态

Question

我是 IOS 编程的新手，我遇到了问题。我有一个表视图，我使用 cellForRowAtIndexPath 中的以下代码在每个单元格中动态加载 UISwitch ，

UISwitch *mySwitch = [[UISwitch alloc]init];
self.myNewSwitch = mySwitch;
[mySwitch release];
[cell setAccessoryView: self.myNewSwitch];
[(UISwitch *)cell.accessoryView addTarget:self action:@selector(changeState:) forControlEvents:UIControlEventValueChanged];

效果很好。当我单击开关时，changeState 中的代码运行良好。

这就是我的问题所在。当用户按下表格中的单元格时，我想查看开关处于什么状态（打开或关闭）。我的问题是我无法弄清楚如何在 didSelectRowAtIndexPath 代码中确定这一点。我可以确定正确的单元格，但当我使用 Google 搜索时，我无法找到如何访问该单元格上的开关。这是我的 didSelectRowAtIndexPath 代码：

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

    //If the on/off switch is on, go to the probes page.  if off, do not do anything
    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];

   //Determine the switch state here.    
    UISwitch *theSwitch;
    theSwitch = ???????  //<- What do I do???

    if (theSwitch.isOn) {
      //define the probes view controller
      Probes *detailViewController = [[Probes alloc] initWithNibName:@"Probes" bundle:nil];
      //pass in the ip address
      detailViewController.lblIPAddr = cell.detailTextLabel.text;

    // Pass the selected object to the new view controller.
      [self.navigationController pushViewController:detailViewController animated:YES];
      [detailViewController release];
    }
    //Deselect this row
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
}

任何帮助/代码都会有帮助。

-NC格林博

Answer 1

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

    //If the on/off switch is on, go to the probes page.  if off, do not do anything
    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];

   //Determine the switch state here.         

    UISwitch *theSwitch = (UISwitch *)cell.accessoryView ;       

    if (theSwitch.isOn) {
      //define the probes view controller
      Probes *detailViewController = [[Probes alloc] initWithNibName:@"Probes" bundle:nil];
      //pass in the ip address
      detailViewController.lblIPAddr = cell.detailTextLabel.text;

    // Pass the selected object to the new view controller.
      [self.navigationController pushViewController:detailViewController animated:YES];
      [detailViewController release];
    }
    //Deselect this row
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
}

但我不知道你为什么使用，

UISwitch *mySwitch = [[UISwitch alloc]init];
self.myNewSwitch = mySwitch;
[mySwitch release];
[cell setAccessoryView: self.myNewSwitch];

每次你创建新的 UITableViewCell 时， self.myNewSwitch 都是相同的 UISwitch （最后一个 UiSwitch ）。