iphone - 在警报中显示当前视图控制器的名称

Question

如果屏幕上显示的视图控制器是“PrimaryViewController”，我正在尝试显示警报我不确定如何获取视图控制器的名称，然后将其转换为 NSString ...任何帮助将不胜感激！ ！！

//get name of current view controller
UIViewController *currentVC = self.navigationController.visibleViewController;
if ([currentVC isEqualToString:@"PrimaryViewController"])
{
    //display name of current view controller in alert    
    UIAlertView *alert = [[UIAlertView alloc]
initWithTitle:@"Your current view controller:" message:currentVC delegate:nil 
cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [alert show];
}

Answer 1

您可以使用NSStringFromClass(). 它以字符串形式返回类的名称。

示例代码：

if ([NSStringFromClass([currentVC class]) isEqualToString:@"PrimaryViewController"])
{
    UIAlertView *alert = [[UIAlertView alloc]
    initWithTitle:@"Your current view controller:" message:NSStringFromClass([currentVC class]) delegate:nil 
    cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [alert show];
}

Answer 2

UIAlertView *alert = [[UIAlertView alloc]
initWithTitle:@"Your current view controller:" message:NSStringFromClass([currentVC class]) delegate:nil 
cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];

Answer 3

您可以用作

if ([NSStringFromClass([self class]) isEqualToString:@"PrimaryViewController"])

使用它来获取您的班级名称：

NSString * name = NSStringFromClass([self class]);

或者

NSString * name = NSStringFromClass([currentVC class]);

Answer 4

我会尝试这样的事情：

 UIViewController *currentVC = self.navigationController.visibleViewController;

 if ([NSStringFromClass([currentVC class] isEqualToString:@"PrimaryViewController"])
    {
     UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Alert"    
     message:NSStringFromClass([currentVC class]) delegate:nil 
     cancelButtonTitle:NSLocalizedString(@"Ok",nil)       
     otherButtonTitles:nil, nil];

     [alert show];

    }

祝你好运！