open class TestMainSDK {

    //singleton
    open static let shared = TestMainSDK()

    open static let testParam = 999

    open func testFun() {
        print("from sdk testFun()")
    }
}

import UIKit
import TestMainSDK

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        TestMainSDK.shared.testFun()
        // Do any additional setup after loading the view, typically from a nib.
    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}

import UIKit
import BlocksKit
import SnapKit

public typealias ActionHandle = (_ vc : UIViewController, _ btn: UIButton)->()

open class TestViewController: UIViewController {

    var testBtnActionHandel : ActionHandle?

    lazy var testBtn : UIButton = {
        let btn = UIButton.init()
        btn.setTitle("sdkTestBtn", for: .normal)
        btn.backgroundColor = UIColor.red
        return btn
    }()


    override open func viewDidLoad() {
        super.viewDidLoad()
        setupStyle()
        // Do any additional setup after loading the view.
    }

    func setupStyle() {
        view.backgroundColor = UIColor.green
        view.addSubview(testBtn)
        testBtn.snp.makeConstraints{
            $0.center.equalToSuperview()
        }
        testBtn.bk_addEventHandler({ [weak self] (btn) in
            print("click sdk testBtn")
            guard let `self` = self else { return}
            if let handle = self.testBtnActionHandel {
                handle(self, btn as! UIButton)
            }
        }, for: .touchUpInside)
    }
}

open func getSDKviewController(vcHandle: (TestViewController)->(),
                               actionHandle: ActionHandle?){
    let vc = TestViewController()
    vc.testBtnActionHandel = actionHandle
    vcHandle(vc)
}

override func viewDidLoad() {
    super.viewDidLoad()
    TestMainSDK.shared.testFun()

    let btn = UIButton.init()
    btn.backgroundColor = UIColor.black
    btn.setTitle("mainBtn", for: .normal)
    view.addSubview(btn)
    btn.snp.makeConstraints{$0.center.equalToSuperview()}

    btn.bk_addEventHandler({ (b) in
        TestMainSDK.shared.getSDKviewController(vcHandle: { (vc ) in
            self.present(vc, animated: true, completion: nil)
        }, actionHandle: { (vc , btn) in
            vc.dismiss(animated: true, completion: nil)
        })
    }, for: .touchUpInside)
}