Objective c 如何以编程方式滚动UIScrollVIew

我想滚动我的

UIScrollView

（水平）。但当按下按钮时，它会进入滚动视图的最左侧。我想滚动3,4像素，当我再次按下时，它会再滚动3,4像素

- (IBAction)leftScroll:(id)sender
{
    CGPoint pt;
    pt.x = 1;
    pt.y = 0;
    UIScrollView *sv = (UIScrollView *)[self.view viewWithTag:5];
    [sv setContentOffset:pt animated:YES];         
}

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提前感谢您的回答

尝试并手动设置新位置

目标-c

  float width = CGRectGetWidth(scrollView.frame);
  float height = CGRectGetHeight(scrollView.frame);
  float newPosition = scrollView.contentOffset.x+width; 
  CGRect toVisible = CGRectMake(newPosition, 0, width, height);

 [scrollView scrollRectToVisible:toVisible animated:YES];

Swift 4

let scrollView = UIScrollView()
let width: CGFloat = scrollView.frame.size.width
let height: CGFloat = scrollView.frame.size.height
let newPosition: CGFloat = scrollView.contentOffset.x + width
let toVisible: CGRect = CGRect(x: newPosition, y: 0, width: width,   height: height)

scrollView.scrollRectToVisible(toVisible, animated: true)

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您可以使用

[scrollView setContentOffset:CGPointMake（x，y）动画：YES]方法。如果滚动视图水平滚动，则需要相应地设置x值，否则设置y值

UIButton *locatorbutton_frame=(UIButton *)[scrollviewoutlet viewWithTag:numberglobal];
float width = scrollviewoutlet.frame.size.width;
float height = scrollviewoutlet.frame.size.height;
float newPosition = scrollviewoutlet.contentOffset.x-locatorbutton_frame.frame.size.width;//+width;
CGRect toVisible = CGRectMake(newPosition, 0, width, height);

[scrollviewoutlet scrollRectToVisible:toVisible animated:YES];

我发现它工作得很好。按钮框是我添加到滚动视图中的按钮。
您可以使用Obj-C中的以下命令滚动到滚动视图中的某个点

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

或迅捷

scrollView.contentOffset = CGPoint(x: x, y: y)

要使用UIScrollView进行幻灯片放映，您可以在滚动视图中排列所有图像，设置一个重复计时器，然后-setContentOffset:animated:当计时器启动时。
很好，这就是工作。但是我想知道我应该更改哪个变量的值，使其滚动小于此值？？这是现在更有效的方法。当滚动结束时，要告诉您，此委托方法是您的朋友：
ScrollViewDiEndScrollingAnimation:（UIScrollView*）scrollView