Top layout guide is deprecated in iOS 11

问题:

As topLayoutGuide property is deprecated in iOS 11, What is alternative to use top layout guide

?

backView.topAnchor.constraint(equalTo: topLayoutGuide.topAnchor)

回答1:

TopLayoutGuide is deprecated in iOS 11 so we have option to use SafeAreaLayoutGuide like this :

• First we can get view safeAreaLayoutGuide

 let guide = view.safeAreaLayoutGuide 

• Second add constraint to guide

  searchBackView.topAnchor.constraint(equalTo: guide.bottomAnchor).isActive = true 

文章来源: Top layout guide is deprecated in iOS 11