title: How could I use SnapKit in Objc project?
body: <p>I create new project with CocoaPods (Xcode 9.3.1 and Swift 4.1)and of course use SnapKit in it.</p>
  
  <p>and I want use third party class TreeView ,this class wrote by Objc.</p>
  
  <p>How cloud I use SnapKit in class TreeView ??? </p>
  
  <p>I try to use the following steps but not working:</p>
  
  <ol>
  <li><p>create new file named SnapKit-Bridging-Header.h</p></li>
  <li><p>go to TreeView.m , import the header file (notice:It ends with '-Swift'):</p>
  
  <p>#import "SnapKit-Swift.h"</p></li>
  <li><p>compiling now is OK! and I can see LayoutConstraint (defined in SnapKit)and some other class in TreeView.m file </p></li>
  <li><p>but when I use view.snp.xxx ,it complain "Property 'snp' not found ..."</p></li>
  </ol>
  
  <p>So my Q is How could I use view.snp.xxx in ObjC file??? Thanks :)</p>