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delovski



Joined: 14 Jun 2006
Posts: 3523
Location: Zagreb

PostPosted: Tue Apr 14, 2009 1:14 am    Post subject: Scroll Views Reply with quote

iphonedevsdk.com - Swipe views

"It's not as simple as you might think. It's up to you to load the images, and
set them up horizontally, then place them in a UIscrollView."
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delovski



Joined: 14 Jun 2006
Posts: 3523
Location: Zagreb

PostPosted: Thu Jun 04, 2009 12:34 pm    Post subject: Reply with quote

MF - Making a UIScrollView in IB

"For whatever reason there's no way to set the contentSize in IB. Set it in
your viewDidLoad method."
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delovski



Joined: 14 Jun 2006
Posts: 3523
Location: Zagreb

PostPosted: Tue Mar 30, 2010 9:37 pm    Post subject: Reply with quote

so - UISwitch within UIScrollview nearly impossible to use…

"On the other hand, if you don't want to modify your UI, you could always
just do:

myScrollView.delaysContentTouches = NO;

This will cause your switch to "get" the touches immediately, rather than
have them go to the UIScrollView first."
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Ike
Kapetan


Joined: 17 Jun 2006
Posts: 3035
Location: Europe

PostPosted: Sun Jul 31, 2011 7:43 pm    Post subject: Reply with quote

Apple Support Communities - UIScrollView touchesEnded being called
twice?


"NOTE: The view controller ONLY gets the event twice when the user is not
scrolling. If the user just taps, then two events fire on the view controller."

Code:
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
   if (self.lastEvent != event.timestamp)  {
      self.lastEvent = event.timestamp;
      [super touchesEnded:touches withEvent:event];
      [self.nextResponder touchesEnded:touches withEvent:event];
   }
}
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delovski



Joined: 14 Jun 2006
Posts: 3523
Location: Zagreb

PostPosted: Thu Aug 04, 2011 7:25 pm    Post subject: Reply with quote

When it comes to UIScrollViews, these two books gave me everything I ne-
eded to know. Of all the other books that I have, with only few exceptions,
none comes even close.

.
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delovski



Joined: 14 Jun 2006
Posts: 3523
Location: Zagreb

PostPosted: Fri Aug 05, 2011 11:31 am    Post subject: Reply with quote

so - UIScrollView with centered UIImageView, like Photos app

"Turns out if you pretty much do the exact same logic but in this delegate
function:

-(void)scrollViewDidZoom:(UIScrollView *)pScrollView

it both starts off centered and when you zoom out it stays centered..."
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delovski



Joined: 14 Jun 2006
Posts: 3523
Location: Zagreb

PostPosted: Wed May 23, 2012 11:30 pm    Post subject: Reply with quote

cocoanetics.com - Hacking UIScrollView Gesture Recognizers

"But the problem with this, as of SDK 3.2., is that if you change the min or
max zoomLevel property the scroll silently adds a UIPinchGestureRecognizer
to itself via the addGestureRecognizer method that now all views have."
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delovski



Joined: 14 Jun 2006
Posts: 3523
Location: Zagreb

PostPosted: Wed Jun 05, 2013 5:39 pm    Post subject: Reply with quote

raywenderlich.com - How To Use UIScrollView to Scroll and Zoom Content

"In this tutorial you’ll learn all about UIScrollViews, from beginning to advanced. You’ll learn:
• How to use a scroll view to view a very large image.
• How to keep the scroll view’s content centered while zooming.
• How to embed a complex view hierarchy inside a UIScrollView.
• How to use UIScrollView’s paging feature in conjunction with the UIPageControl, to allow scrolling through multiple pages of content.
• How to make a “peeking” scroll view that gives a glimpse of the previous/next page as well as the current page.
• And much more!"
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