单击后退按钮时，iCarousel显示在上一页中

Question

当我按下后退按钮时。 iCarousel仍然显示1秒钟。为什么会发生这种情况以及如何阻止这种情况。我使用故事板创建了一个iCarosel视图..

- (void)viewDidUnload
{
    [super viewDidUnload];
    self.carousel = nil;
}
- (void)dealloc
{
    carousel.delegate = nil;
    carousel.dataSource = nil;
}

- (NSUInteger)numberOfItemsInCarousel:(iCarousel *)carousel
{
  return [idOfAllWords count];
}

- (UIView *)carousel:(iCarousel *)carousel viewForItemAtIndex:(NSUInteger)index reusingView:(UIView *)view
{
    UILabel *label = nil;

    //create new view if no view is available for recycling
    if (view == nil)
    {
        view = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 250.0f, 250.0f)];
        ((UIImageView *)view).image = [UIImage imageNamed:@"page.png"];
        view.contentMode = UIViewContentModeCenter;
        label = [[UILabel alloc] initWithFrame:view.bounds];
        label.backgroundColor = [UIColor clearColor];
        label.textAlignment = NSTextAlignmentCenter;
        label.font = [label.font fontWithSize:50];
        label.tag = 1;
        [view addSubview:label];
    }
    else
    {
        label = (UILabel *)[view viewWithTag:1];
    }
    Words *word=nil;
    word=idOfAllWords[index];
    label.text =word.Name;
    return view;
}

Answer 1

隐藏和取消隐藏不是解决方案。你需要的只是一行：

yourCarousel.clipsToBounds = YES;

Answer 2

我实际上试图重现你的问题并且确实看到当“弹出”或后退按钮发生时旋转木马视图停留一秒钟。当您转动旋转木马然后按下后退按钮时尤其会发生这种情况。作为一种解决方法，我能够通过在viewWillDisappear方法中隐藏iCarousel来修复它。

- (void)viewWillDisappear:(BOOL)animated 
{

[YOUR_CAROUSEL_NAME setHidden:YES]; //This sets the carousel to be hidden when you press Back button

}

如果看起来突然隐藏，您可以尝试在动画块内设置alpha为0.0。像这样：

- (void)viewWillDisappear:(BOOL)animated 
{

//[YOUR_CAROUSEL_NAME setHidden:YES]; 
[UIView animateWithDuration:0.2f animations:^{
   [YOUR_CAROUSEL_NAME setAlpha:0.0f]; //This makes the carousel hide smoothly
}];

}

希望这有帮助！