标签是特定文本时更改视图控制器？

2 回答

• 0

  如果要检查字符串是否等于特定字符串，则在设置标签文本时可以执行以下操作：

  label.text = string;
  
  if ([string isEqualToString:@"Specific String"]) {
      ExampleViewController *exampleViewController = [[ExampleViewController alloc] init];
      [self.navigationController pushViewController:exampleViewController animated:YES
  }
  

  如果您想要延迟以便显示标签，那么在延迟推送下一个视图控制器后，您可以执行以下操作：

  label.text = string;
  
  double delayInSeconds = 2.0;
  dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);
  dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
      //code to be executed on the main queue after delay
      if ([string isEqualToString:@"Specific String"]) {
          ExampleViewController *exampleViewController = [[ExampleViewController alloc] init];
          [self.navigationController pushViewController:exampleViewController animated:YES
      }
  });
  

  回复于 2024-05-14T16:09:40+08:00
• 0

  我试过了

  [_lblStatus performSelectorOnMainThread:@selector(setText:) withObject:[metadataObj stringValue] waitUntilDone:NO];
  
  
          if ([_lblStatus isEqual:@"A123"]) {
              NSString * storyboardName = @"Main_iPhone";
              UIStoryboard *storyboard = [UIStoryboard storyboardWithName:storyboardName bundle: nil];
              UIViewController *vc = [storyboard instantiateViewControllerWithIdentifier:@"CheckViewController"];
              [self presentViewController:vc animated:YES completion:nil];
  
          }
  

  我确实将标签更改为A123，但在此之后我无法切换到其他视图控制器 . 我试过你的答案@ferris但是我不能设置我的_lblStatus = string; （字符串会导致错误，除非我在.h文件中定义它 .

  回复于 2024-05-14T16:09:40+08:00