问题
I have a UIScrollView with several UITableViews embedded in it. I want to allow each table to expand its height as much as is needed to display all of its cells. The scroll view's frame takes up the whole screen, so its contentSize.height need to expand to fit the biggest table (which I think is the default behavior, but I mention it just in case I'm incorrect). Can this all be done on my storyboard? Or if I will need to add code to do it, I found this tutorial, but it's for iOS 6 - has any of the code for this constraint stuff changed for iOS 7?
回答1:
If you know in advance how much room each table takes up you can do it purely in your storyboard, but because each UITableView is also a scrollview the default behavior of a UITableView is to fill the assigned size with content and scroll if there is overflow.
If you do not know the height of the tables at design time, you will need to set them at run time. See Autolayout a UIScrollView to fit content including subviews and grouped tables for an example, the short answer is to add a height constraint to your table, drag it into your controller as an outlet, and then set the height when you know it.
回答2:
It can be done both ways.Manually moving UI elements through code(mentioning locations) and overriding it in did rotate or through mentioning constraints in auto layout.
This link http://www.doubleencore.com/2013/09/auto-layout-updates-in-ios-7/ provides details of ios7 auto layout .
来源：https://stackoverflow.com/questions/19252020/xcode-5-auto-layout-embedded-tables