Question

我的应用程序正在崩溃生产，我无法重现Fabric不断发送给我的错误。 UISearchController存在一些问题，但是当我在应用程序上使用它时效果很好。我注意到的一件事是在所有设备上出现此错误时可用的低RAM内存。它可能与内存泄漏有关吗？由于需要更多内存，操作系统可能会释放对象，从而将未识别的选择器发送到实例＆＃34;，因为尝试发送消息（函数）的对象已经解除分配，但是客户，我和＃39;我仍然面临这个问题，在我的应用程序中，此时我没有任何内存泄漏。

堆栈跟踪：

    Fatal Exception: NSInvalidArgumentException

-[_UIAlertControllerAlertPresentationController adaptivePresentationController]: unrecognized selector sent to instance 0x104fb1420
 Raw Text
0
CoreFoundation  
__exceptionPreprocess
1   libobjc.A.dylib 
objc_exception_throw
2   CoreFoundation  
__methodDescriptionForSelector
3
CoreFoundation  
___forwarding___
4   CoreFoundation  
_CF_forwarding_prep_0
5
UIKit   
-[UISearchController _searchPresentationController]
6   UIKit   
-[_UISearchControllerInPlaceSearchBarAnimator animateTransition:]
7   UIKit   
__56-[UIPresentationController runTransitionForCurrentState]_block_invoke
8   UIKit   
_runAfterCACommitDeferredBlocks
9   UIKit   
_cleanUpAfterCAFlushAndRunDeferredBlocks
10  UIKit   
_afterCACommitHandler
11  CoreFoundation  
__CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__
12  CoreFoundation  
__CFRunLoopDoObservers
13  CoreFoundation  
__CFRunLoopRun
14  CoreFoundation  
CFRunLoopRunSpecific
15  GraphicsServices    
GSEventRunModal
16
UIKit   
UIApplicationMain
17  *****   
MAMarketPlaceViewModel.swift line 14
main
18  libdyld.dylib   
start

这就是我使用SearchController的方式：

lazy var searchController = { () -> UISearchController in

        let search = UISearchController(searchResultsController: nil)
        search.searchResultsUpdater = self
        search.delegate = self
        search.hidesNavigationBarDuringPresentation = false
        search.dimsBackgroundDuringPresentation = false
        search.definesPresentationContext = true
        search.searchBar.placeholder = L10n.searchProducts
        search.searchBar.delegate = self

        return search
    }()
....
fileprivate func setupNavigationBar() {

        if #available(iOS 11.0, *) {
            self.navigationController?.navigationBar.prefersLargeTitles = true
            self.navigationItem.largeTitleDisplayMode = .always
            self.navigationItem.searchController = searchController
            self.navigationController?.navigationBar.tintColor = UIColor.Palette.intenseGray
            self.navigationItem.hidesSearchBarWhenScrolling = false
        } else {
            self.extendedLayoutIncludesOpaqueBars = true
            searchController.searchBar.searchBarStyle = .prominent
            tableView.tableHeaderView = searchController.searchBar
        }
        if self.tableView.tableHeaderView != nil {
            self.tableView.tableHeaderView?.isHidden = false
        }
    }

更新

在RxSwift的onError事件中我显示了AlertController，这是我认为我有一个UISearchController和一个显示AlertController的唯一地方。

protocol MarketCartPresentable : class {
  var disposeBag : DisposeBag { get }
  func showCart()
  func present(product: MAProductMktPlace, with cart: MACarts)

}
extension MarketCartPresentable where Self : MAMainViewController, Self : MAMainViewControllerProtocol {

func showCart() {

    guard let viewModel = self.viewModel as? Buyable else { return } //We need to have a ViewModel which impements Buyable Protocol! =)

    viewModel.getCarts()
        .asDriver(onErrorJustReturn: MACarts())
        .asObservable()
        .observeOn(MainScheduler.instance)
        .subscribe(onNext: { [weak self](carts) in

            let cartViewModel = MAMktCartViewModel(cartLines: carts)
            let cartViewController = MAMktCartViewController(_associatedViewModel: cartViewModel)
            let cartNavController = MACheckoutNavigationController(rootViewController: cartViewController)
            self?.present(cartNavController, animated: true, completion: {

            })

            }, onError: { [weak self] (error) in

                guard let errorMsg = error as? MAErrorProtocol else {

                    self?.showAlertWith(title: L10n.errorTitle , message: error.localizedDescription)
                    return
                }

                self?.showAlertWith(title: L10n.errorTitle , message: errorMsg.errorMessage)

        }).addDisposableTo(self.disposeBag)
}

Swift - - [_ UIAlertControllerAlertPresentationController adaptivePresentationController]：无法识别的选择器发送到实例0x104fb1420

0 个答案: