Iphone 延迟显示子视图

当执行此操作时，它会直接显示secondviewcontroller我想要的是viewcontroller首先显示，然后在40或50秒后，它会显示secondviewcontroller next，依此类推

- (void)displayviewsAction:(id)sender
{
PageOneViewController *viewController = [[PageOneViewController alloc] init];

viewController.view.frame = CGRectMake(0, 0, 320, 480);

SecondViewController *secondController = [[SecondViewController alloc] init];

secondController.view.frame = CGRectMake(0, 0, 320, 480);

[self.view addSubview:viewController.view];

[self.view addSubview:secondController.view]; 

[self.view bringSubviewToFront:viewController.view];

[self.view addSubview:toolbar];

[self.view sendSubviewToBack:viewController.view];

[self.view addSubview:toolbar];

}

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任何人都知道我如何做到这一点。

您可以在单独的方法中添加secondViewController，并使用

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您可以在单独的方法中添加secondViewController，并使用

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Aravindhanavilless详述的方法的另一个替代/补充是使用NSTimer：

self.myTimer = [NSTimer scheduledTimerWithTimeInterval:40 target:self selector:@selector(showSecondViewController) userInfo:nil repeats:NO];

---

Aravindhanavilless详述的方法的另一个替代/补充是使用NSTimer：

self.myTimer = [NSTimer scheduledTimerWithTimeInterval:40 target:self selector:@selector(showSecondViewController) userInfo:nil repeats:NO];

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尝试使视图不可见，然后在40秒后快速淡入

secondController.view.alpha = 0.0;
[self.view addSubview:secondController.view];
[UIView animateWithDuration:0.5
            delay:40 
            options:UIViewAnimationCurveEaseInOut 
            animations:^{
                secondController.view.alpha = 1.0;
            }
            completion:NULL
];

---

尝试使视图不可见，然后在40秒后快速淡入

secondController.view.alpha = 0.0;
[self.view addSubview:secondController.view];
[UIView animateWithDuration:0.5
            delay:40 
            options:UIViewAnimationCurveEaseInOut 
            animations:^{
                secondController.view.alpha = 1.0;
            }
            completion:NULL
];