Question

当执行此操作时，它直接显示secondviewcontroller我想要的是viewcontroller首先显示，在40或50秒之后它会显示nextviewcontroller 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];

}

任何人都有任何想法，我怎么能这样做。

Answer 1

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
];

Answer 2

您可以在单独的方法中添加secondViewController，并使用 performSelector:withObject:afterDelay

调用该方法

- (void)displayviewsAction:(id)sender {

PageOneViewController *viewController = [[PageOneViewController alloc] init];    
viewController.view.frame = CGRectMake(0, 0, 320, 480); 
[self.view addSubview:viewController.view];
[self performSelector:@selector(secondViewController) withObject:nil afterDelay:40];  
}


-(void)secondViewController {

SecondViewController *secondController = [[SecondViewController alloc] init];
secondController.view.frame = CGRectMake(0, 0, 320, 480);
[self.view addSubview:secondController.view];
}

Answer 3

Aravindhanarviless详述的方法的替代/补充是使用NSTimer：

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

显示延迟的子视图

3 个答案: