Ios 标签不'；我不会相应地改变

我遇到了以下问题：标签总是更改为标签9001中定义的标签。有人能帮我找出错误吗

ViewController.m：

- (IBAction)switch0:(id)sender

{(button.tag = 9001);
UIButton *buttonPressed = (UIButton *)sender;
SecondViewController *second =[[SecondViewController alloc] initWithNibName:nil     bundle:nil];
 [self presentModalViewController:second animated:YES];
second.buttonTag  = buttonPressed.tag;
 }


- (IBAction)switch2:(id)sender2

{ (button2.tag = 9002); 
UIButton *buttonPressed = (UIButton *)sender2;
SecondViewController *third =[[SecondViewController alloc] initWithNibName:nil bundle:nil];
[self presentModalViewController:third animated:YES];
second.buttonTag  = buttonPressed.tag;

}

SecondViewcontroller.m

  - (void)viewDidLoad
 {
[super viewDidLoad];

if (buttonTag == 9001) {
self.label1.text = [[NSString alloc] initWithFormat:@"Radnomtext"];
self.label2.text = [[NSString alloc] initWithFormat:@"Randomtext"];
self.label3.text = [[NSString alloc] initWithFormat:@"Randomtext?"];
}
if (buttonTag == 9002) {
self.label1.text = [[NSString alloc] initWithFormat:@"Radnomtext2"];
self.label2.text = [[NSString alloc] initWithFormat:@"Randomtext2"];
self.label3.text = [[NSString alloc] initWithFormat:@"Randomtext2?"];

---

下面是一个示例，您两次展示视图，我在这个示例中取出了模态：

   - (IBAction)switch0:(id)sender

    {
    UIButton *buttonPressed = (UIButton *)sender;
    SecondViewController *second =[[SecondViewController alloc] initWithNibName:nil     bundle:nil];

 NSInteger tagToSet = 9001;
    second.buttonTag  = tagToSet;;
      [self.navigationController pushViewController:second animated:YES];
     }

---

而使用关键字切换是不好的。它在目标C中是一个保留字。

可能是因为您忘记关闭第一个

的结束括号，如果

if (buttonTag == 9001) {
    self.label1.text = [[NSString alloc] initWithFormat:@"Radnomtext"];
    self.label2.text = [[NSString alloc] initWithFormat:@"Randomtext"];
    self.label3.text = [[NSString alloc] initWithFormat:@"Randomtext?"];
} // bracket supposed to be here

if (buttonTag == 9002) {

或者您将
按钮标记设置为不正确的实例

- (IBAction)switch2:(id)sender2

{
UIButton *buttonPressed = (UIButton *)sender2;
SecondViewController *third =[[SecondViewController alloc] initWithNibName:nil bundle:nil];
[self presentModalViewController:third animated:YES];
second.buttonTag  = buttonPressed.tag; // supposed to be third?
[self.navigationController pushViewController:third animated:YES];
(button2.tag = 9002); 
}

为了安全起见，您应该在按下view.secondButton.tag=9001之前设置
presentModalViewController
您需要设置标签；和secondButton.tag=9002；在推送视图之前。如果将其设置为senders标记，则可以在interface builder或情节提要中设置标记。请参阅上面编辑的代码，如果希望使用ModalView，只需将推送方法更改为presentModalViewController:animated；谢谢你的代码，我实现了它，但遗憾的是它仍然没有改变到另一个标签，除了9001Good eye man的标签。我想这里可能会有一些编译器警告。它在编译器中，我只是忘了把它复制到这里。所以，这（很遗憾）不是错误，而是thx指出的：）谢谢，我确实忘记了，仍然没有做这个把戏。另外，在另一个按钮之前设置buttontag也没有帮助：（我也注意到了这一点：sender2应该是sender。我编辑它以显示正确的代码！谢谢大家的帮助