如何将按钮标签传递给 prepareForSegue

Posted 2023-03-08

【中文标题】如何将按钮标签传递给 prepareForSegue

【英文标题】：How to pass button tag to prepareForSegue

【发布时间】：2013-11-22 12:10:43

【问题描述】：

在 Xcode（iPhone 应用程序）中，我以编程方式创建了许多按钮，如下所示：

- (void)viewDidLoad

    [super viewDidLoad];

    // By Road Button
    byRoadButton = [UIButton buttonWithType:UIButtonTypeCustom];
    byRoadButton.tag = 3;
    byRoadButton.frame = CGRectMake(20, 246, 280.f, 40.f);
    UIImage *roadButton = [UIImage imageNamed:@"gettingHereByRoadButton.png"];
    [byRoadButton setBackgroundImage:roadButton forState:UIControlStateNormal];
    [self.view addSubview:byRoadButton];
    [byRoadButton addTarget:self action:@selector(byRoadButtonClicked) forControlEvents:UIControlEventTouchUpInside];

然后我检查哪个按钮被按下：@selector，然后调用 performSegueWithIdentifier。 NSLog 在此处显示正确的按钮标记作为检查。

- (void) byRoadButtonClicked

    NSLog(@"Button Pushed Tag Number: %d", byRoadButton.tag);
    [self performSegueWithIdentifier:@"gettingHereSegue" sender:self];

但是？思路是把这个标签传给prepareForSegue，根据标签号，把那个按钮关联的信息传给下一个ViewController？

我试过了：

[self performSegueWithIdentifier:@"gettingHereSegue" sender:byRoadButton.tag];

但是得到一个错误提示我试图传递一个 int 而不是一个 id。

在我的 prepareForSegue 中，我有以下内容：

- (void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender

    // ThIS IS WHAT I WANT TO DO - PSEUDO CODE
    //int tagNumber = sender;
    //if (tagNumber == 3)
    //
          //Set relevant content of Object here
    //

    //THIS IS WHAT I CURRENTLY HAVE - NO CHECK FOR TAG
    GettingHereContent *gettingHereContent = [[GettingHereContent alloc] init];
    gettingHereContent.content = @"This is my custom content based on this buttons click";

    GettingHereViewController *vc = (GettingHereViewController *)segue.destinationViewController;
    vc.gettingHere = gettingHereContent;   

或者任何人都可以提出解决方案或更好的方法吗？

【问题讨论】：

尝试 [self performSegueWithIdentifier:@"gettingHereSegue" sender:byRoadButton];然后在prepareForSegue if (byRoadButton.tagNumber == 3) //这里设置Object的相关内容

是的，非常感谢。在 prepareForSegue 中，我所要做的就是检查按钮是否等于发送者，如下所示： if (byRoadButton == sender) // Do something here 我不必担心标签号来检查按钮点击。再次感谢

【参考方案1】：

  // try This replace with your code
 [self performSegueWithIdentifier:@"gettingHereSegue" sender:byRoadButton];

-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(UIButton *)sender

  NSLog(@"%ld",(long)sender.tag);

【参考方案2】：

试试

[self performSegueWithIdentifier:@"gettingHereSegue" sender:byRoadButton]; 

然后在prepareForSegue

if (sender.tagNumber == 3)  //Set relevant content of Object here