Question

我有一个水平scrollView，其中包含2张图片。scrollView是圆形的。我想要做的是在几秒钟后设置自动滚动。任何想法我该怎么做？< / p>

我尝试了以下内容：

[UIScrollView beginAnimations:@"scrollAnimation" context:nil];
    [UIScrollView setAnimationDuration:5];
    [UIScrollView setContentOffset:CGPointMake(self.view.frame.size.width, 0)];
    [UIScrollView commitAnimations];

但是这个：[UIScrollView setContentOffset:CGPointMake(self.view.frame.size.width, 0)];无法识别。任何想法？谢谢

Answer 1

你误解了动画声明语法我们建议您在代码中引用滚动视图，如下所示：

UIScrollView *scrollView = ...; // it must have a reference to the actual scroll view instance
...
[UIView beginAnimations: @"scrollAnimation" context:nil];
[UIView setAnimationDuration: 5.0f];

[scrollView setContentOffset:CGPointMake(x,y)];

[UIView commitAnimations];

这应该对你有用

Answer 2

做这样的事情： - ）

   [NSTimer scheduledTimerWithTimeInterval:5.0 target:self selector:@selector(onTimer) userInfo:nil repeats:YES];

     - (void) onTimer {

       // Updates the variable h, adding 100 (put your own value here!)
      h += 100; 

      //This makes the scrollView scroll to the desired position  
      yourScrollView.contentOffset = CGPointMake(0, h);  

    }

水平滚动视图在几秒钟后自动滚动

2 个答案: