![]() How to use Auto Layout with more than One Object If you are developing the app for both iOS 7 and 8, it is best to “ Untick” the Constrain to Margins. ![]() If the deployment target of your app is iOS 7 and above and any of your constraints have this layout margin, the XCode will complain with the warning “Layout attributes relative to the layout margin on iOS prior to 8.0”. The meaning of this selection is to add constraints with the new property in iOS 8. Whenever you are trying to add new constraints from the storyboard in XCode 6, “ Constrain to Margins” is ticked by default as show as the screen shot below. So, if you have any constraints related to layout margin and you didn’t do a proper check before launching the app on iOS 7 devices, the app might crash or the arrangement of the objects might be out of order. If you are developing the app for both iOS 7 and iOS 8, you should not use Layout Margin (or use layout margin in a smart way). ![]() So, any objects inherit from UIView will have this property. Layout Margin is a new property available in UIView for iOS 8. One of new things in iOS 8 is the Layout Margin. So before getting started, it is good to know the differences between Autolayout in iOS 7 compare with iOS 8. I believe most iOS developers will still include iOS 7 under their development plan. I am going to show the techniques to link different objects together using constraints inside the same view controller. In this article, I am going to share a few common layouts, scenarios and problems that I am facing when I am developing the iOS app using the Auto Layout. As promised from a previous post ( How to Use Auto Layout in XCode 6 for iOS 7 and 8 Development) that I will write another article related to more advanced techniques in AutoLayout to develop iOS mobile apps for iOS 7 and iOS 8. ![]()
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