tabbar的iphone应用程序

如何在中定义和检查AlreadySelectedSpecific选项卡和viewControllerNotToAllow 我的申请书。谁给我举个例子

实际上我想做点什么。喜欢当选择了第二个选项卡时，如果我们选择了“第二个选项卡”，则此时不选择“第二个选项卡”，只选择“重新制作”选项卡

这就是我使用以下代码的原因

请回复

- (BOOL)tabBarController:(UITabBarController *)tabBarControllers shouldSelectViewController:(UIViewController *)viewController
{
if(alreadySelectedSpecificTab)
        {
             if([viewController isEqual:viewControllerNotToAllow])
                  return NO;
        }
        return YES;
}

---

在类中创建一些属性

并记录你想否认什么和不想否认什么

id currentlySelected; //This will hold the address of the selected view
id dontAllowSelection; //This will hold the address of the Denied view


- (BOOL)tabBarController:(UITabBarController *)tabBarControllers shouldSelectViewController:(UIViewController *)viewController
{
    if (dontAllowSelection != nil &&             //If it is nil, we will skip it.
         dontAllowSelection == viewController)   //If the selected view is Denied return NO
    {
        return NO;
    }
    currentlySelected = viewController;

    if (currentlySelected == someViewIWantToDisableOtherFor) //Any logic can go here to enable the Denied View.
    {
        dontAllowSelection = anotherViewIWantDisabled; //Set my denied view.
    }
    else
    {
        dontAllowSelection = nil; //Unsed the Denial.
    }

    return YES;
}

---

我不知道你到底想做什么？