以编程方式滚动UIScrollView

Question

In my iPhone application, I have a UIScrollview with five pages. Is that possible to tap a button and scroll the pages? for example, I am in the first page and if I press the "Button 5" the fifth page should come over like you scrolling with your hand.

Is this possible?

Answer 1

Sure it is possible! Check the method - (void)setContentOffset:(CGPoint)contentOffset animated:(BOOL)animated . When you press the button, call it with the point offset (x and y) and set animated to YES.

Also, if you are using a UIScrollView, it is very recommended by Apple's Human Interface Guidelines that you use a UIPageControl, that is good for two reasons: (1) shows the user in which page he is, and (2) can tell your view controller if it was tapped (however, as the doc says, "the page control advances only one page in either direction" , so if you need to jump, let's say, from page 2 to 5, maybe would be better to use buttons).

Answer 2

you can do this by this one line code.

[scrollView scrollRectToVisible:frame animated:YES];

here you need to provide frame to it that wich part of scrollview you want to show.