UIScrollView doesn’t use autolayout constraints

by

The relationship between UIScrollView and auto layout is different from other aspects of auto layout. Basically, if simple auto layout were allowed to operate, nothing would scroll. For example, if a subview of the scroll view were pinned in the normal way by a constraint to 10 points from the top of the scroll view, it would be absolutely pinned there; it would never move, no matter how the scroll view were scrolled.

To solve this problem, a UIScrollView that uses autolayout operates in a completely new way. Therefore when you say “I am using autolayout” you must prepare for things to operate very differently from before. You must either use a single scroll view subview with translatesAutoresizingMaskIntoConstraints = YES, and an explicit content size, or else everything must have translatesAutoresizingMaskIntoConstraints = NO and the content size will be deduced implicitly based on the constraints of the subviews.

This is very well explained in https://developer.apple.com/library/content/releasenotes/General/RN-iOSSDK-6_0/index.html

More Related Contents:

  1. Creating layout constraints programmatically
  2. UITextView inside UIScrollView with AutoLayout
  3. “Auto Layout still required after executing -layoutSubviews” with UITableViewCell subclass
  4. NSInvalidUnarchiveOperationException: Could not instantiate class named NSLayoutConstraint
  5. Scrolling a UITableView inside a UIScrollView
  6. UIScrollView contentSize not working
  7. UIScrollview getting touch events
  8. Getting the visible rect of an UIScrollView’s content
  9. Auto layout UIScrollView with subviews with dynamic heights
  10. Hide autolayout UIView : How to get existing NSLayoutConstraint to update this one
  11. UIScrollview with UIButtons – how to recreate springboard?
  12. how to remove subviews from scrollview?
  13. UIScrollView doesn’t scroll after upgrading to iOS7 / xcode 5
  14. What is the best way to unit test Objective-C code?
  15. Why do nil / NULL blocks cause bus errors when run?
  16. Objective-C Protocol Forward Declarations
  17. Core Data unique attributes
  18. Learning the basics of UIScrollView
  19. Why can’t I release an object anymore? [duplicate]
  20. Disable App Nap in MacOS 10.9 (Mavericks) application
  21. Does Objective-C allow circular dependencies?
  22. Objective-C: Instance Variable in Category
  23. how to run my application in background in iphone?
  24. Why do I need to write @synthesize when I provide getter and setter?
  25. Why does string show up in NSDictionary with quotes, but others don’t? [duplicate]
  26. Dependency injection framework for Cocoa? [closed]
  27. Objective C: Send email without leaving app
  28. How to retrieve the most recent photo from Camera Roll on iOS?
  29. Objective-C Difference between setting nil and releasing
  30. How do I take a “screenshot” of an NSView?

Leave a Comment