ios - UIScrollView not scrolling when adding UIButtons as subviews -

i'm trying build simple uiscrollview paging horizontally scroll between 3 images. tricky part each image clickable , catch click event.

my technique create 3 uibuttons each consists uiimage. give each button tag , set action.

problem: can catch click event - but it's not scrollable!

here code:

- (void) viewdidappear:(bool)animated {      _imagearray = [[nsarray alloc] initwithobjects:@"content_01.png", @"content_02.png", @"content_03.png", nil];      (int = 0; < [_imagearray count]; i++) {         //we'll create imageview object in every 'page' of our scrollview.         cgrect frame;         frame.origin.x = _contentscrollview.frame.size.width * i;         frame.origin.y = 0;         frame.size = _contentscrollview.frame.size;          //         //get image use, want         uiimage* image = [uiimage imagenamed:[_imagearray objectatindex:i]];          uibutton* button = [[uibutton alloc] initwithframe:frame];          //set button states want image show         [button setimage:image forstate:uicontrolstatenormal];         [button setimage:image forstate:uicontrolstatehighlighted];          //create touch event target, calling 'productimagepressed' method         [button addtarget:self action:@selector(imagepressed:)          forcontrolevents:uicontroleventtouchupinside];         //i set tag image #, looking though array of them         button.tag = i;          [_contentscrollview addsubview:button];     }      //set content size of our scrollview according total width of our imageview objects.     _contentscrollview.contentsize = cgsizemake(_contentscrollview.frame.size.width * [_imagearray count], _contentscrollview.frame.size.height);      _contentscrollview.backgroundcolor = [engappdelegate backgroundcolor];     _contentscrollview.delegate = self; } 

well, since uibutton uicontrol subclass, "eats up" touches of scroll view:

[uiscrollview touchesshouldcancelincontentview:] default returned value yes if view not uicontrol object; otherwise, returns no.

(from https://developer.apple.com/library/ios/documentation/uikit/reference/uiscrollview_class/reference/uiscrollview.html#//apple_ref/occ/instm/uiscrollview/touchesshouldcancelincontentview:)

you could influence subclassing uiscrollview , overwriting touchesshouldcancelincontentview: (and/or touchesshouldbegin:withevent:incontentview:). however, use case i'd not use buttons in first place. why not add tap gesture recognizer scrollview , use touch point determine image has been tapped? that's easier , should work without issues.