how to remove subviews from scrollview?

To remove all the subviews from any view, you can iterate over the subviews and send each a removeFromSuperview call:

// With some valid UIView *view:for(UIView *subview in [view subviews]) {    [subview removeFromSuperview];}

This is entirely unconditional, though, and will get rid of all subviews in the given view. If you want something more fine-grained, you could take any of several different approaches:

• Maintain your own arrays of views of different types so you can send them removeFromSuperview messages later in the same manner
• Retain all your views where you create them and hold on to pointers to those views, so you can send them removeFromSuperview individually as necessary
• Add an if statement to the above loop, checking for class equality. For example, to only remove all the UIButtons (or custom subclasses of UIButton) that exist in a view, you could use something like:

// Again, valid UIView *view:for(UIView *subview in [view subviews]) {    if([subview isKindOfClass:[UIButton class]]) {        [subview removeFromSuperview];    } else {        // Do nothing - not a UIButton or subclass instance    }}

An old question; but as it's the first hit on Google for this I thought I'd also make a note that there's also this method:

[[myScrollView subviews] makeObjectsPerformSelector:@selector(removeFromSuperview)];

You can't do the isKindOfClass check with this, but it's still a good solution to know about.

Edit: Another point to note is that the scrollbar of a scrollview is added as a subview to that scrollview. Thus if you iterate through all the subviews of a scrollview you will come across it. If removed it'll add itself again - but it's important to know this if you're only expecting your own UIView subclasses to be in there.

Amendment for Swift 3:

myScrollView.subviews.forEach { $0.removeFromSuperview() }

To add to what Tim said, I noticed that you are tagging your views. If you wanted to remove a view with a certain tag you could use:

[[myScrollView viewWithTag:myButtonTag] removeFromSuperview];