从 UITableView didSelectRowAtIndexPath 检测 UISegmentedControl 中的选择更改

Posted 2023-02-27

【中文标题】从 UITableView didSelectRowAtIndexPath 检测 UISegmentedControl 中的选择更改

【英文标题】：Detect select change in UISegmentedControl From UITableView didSelectRowAtIndexPath

【发布时间】：2016-01-02 22:59:23

【问题描述】：

我正在尝试检测 UISegmentedControl 选择是否更改为执行操作，但是当我更改选择时没有任何反应，我从单元格中的标签获得 UISegmentedControl

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


UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath]; 
UISegmentedControl *doing = (UISegmentedControl *)[cell viewWithTag:512];

 NSString *done = [NSString stringWithFormat:@"%@", [[_myarraytask objectAtIndex:indexPath.row]valueForKey:@"done"]];
if ([done isEqualToString:@"NO"]) 



doing.userInteractionEnabled = YES;

if(doing.selectedSegmentIndex==0)


    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Task finish ?" message:@"Please confirm" preferredStyle:UIAlertControllerStyleAlert];

    [alertController addAction:[UIAlertAction actionWithTitle:@"Confirm" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) 

    ]];


    [alertController addAction:[UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) 
        [self closeAlertview:(cell)];
    ]];

    dispatch_async(dispatch_get_main_queue(), ^ 
        [self presentViewController:alertController animated:YES completion:nil];
    );

【参考方案1】：

UISegmentedControl 不是这样工作的，您需要为其分配一个选择器方法事件 (UIControlEventValueChanged)。这样它就会监听索引的变化然后调用那个函数。`

所以在你的牢房里

UISegmentedControl *doing = (UISegmentedControl *)[cell viewWithTag:512];
[doing addTarget:self
          action:@selector(action:)
forControlEvents:UIControlEventValueChanged];

然后将该代码从委托中移出到它自己的函数中：

-(void)action(id)sender
    UISegmentedControl* doing = (UISegmentedControl*)sender;
    if(doing.selectedSegmentIndex==0)
     //...
    else
     //...