Question

在loginVC中我点击它创建了一个按钮，它会像这样进入主tabbarcontroller到segue ..

@IBAction func btnLoginPressed(sender: AnyObject) {
 self.performSegueWithIdentifier("logintoMain", sender: self)    
}

成功进入tabbarmainVC，但之后swRevealviewController变为nil ..并且滑动在这里不起作用。为什么呢？

class MaintabbarController: UIViewController{

@IBOutlet weak var slideBtn: UIBarButtonItem!

override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.
    if self.revealViewController() != nil{
        slideBtn.target = self.revealViewController()
        slideBtn.action = #selector(SWRevealViewController.revealToggle(_:))
        self.view.addGestureRecognizer(self.revealViewController().panGestureRecognizer())
    }    
}

被修改

我在登录按钮上也试过这个代码，点击进入mainTabbarvc。现在它的工作正常。实际上我必须推动revealviewController，而不仅仅是它将是活动的..

 @IBAction func btnLoginPressed(sender: AnyObject) {
  let sb = UIStoryboard(name: "Main", bundle: nil)
  let vc =sb.instantiateViewControllerWithIdentifier("yourtabbarvcidentifier") as! UITabBarController
   vc.selectedIndex = 0
 // self.presentViewController(vc, animated: true, completion: nil)
    self.revealViewController().pushFrontViewController(vc, animated: true)
  }

Answer 1

尝试将其添加到此功能，看看会发生什么：

override func viewWillAppear(animated: Bool) {
    if self.revealViewController() != nil{
    slideBtn.target = self.revealViewController()
    slideBtn.action = #selector(SWRevealViewController.revealToggle(_:))
    self.view.addGestureRecognizer(self.revealViewController().panGestureRecognizer())
 }
}

视图处于活动状态时会出现。

SWRevealViewController在通过segue返回后变为零？

1 个答案: