Single Example: Example with afnetworking encapsulation

Ways to create a singleton

1 Import afnetworking 2 3 class Networktools:afhttpsessionmanager {4     5     // Let is thread-safe 6     // use a singleton instance just to get networktools This class takes out this constant attribute to get a single case 7     static Let Shareinstance:networktools = networktools ()89 }

How to use the concrete

1 Import UIKit2 3 classViewcontroller:uiviewcontroller {4 5     Overridefunc viewdidload () {6 super.viewdidload ()7         //The following two singleton addresses are consistent after the compilation is run,8 print (networktools.shareinstance)9 print (networktools.shareinstance)Ten     } One  A     OverrideFunc Touchesbegan (_ Touches:set<uitouch>, withEvent: Uievent?) { -         //after running compilation, the following two singleton addresses are inconsistent, using a singleton must take a constant attribute, and using networking directly creates an instance - print (networktools.shareinstance) the print (Networktools ()) -     } -}

There are two main types of single cases:

1. It's always an example to get through shareinstance.

2. Whatever it is, getting it is always an example.

Single Example: Example with afnetworking encapsulation