xcode 7.3.1上的分段错误11

Archive 过程 with Xcode 7.3.1 (7D1014) 中的奇怪错误

0  swift                    0x000000010d05766b llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 43
1  swift                    0x000000010d056956 llvm::sys::RunSignalHandlers() + 70
2  swift                    0x000000010d057ccf SignalHandler(int) + 287
3  libsystem_platform.dylib 0x00007fff91a3f52a _sigtramp + 26
4  libsystem_platform.dylib 0x000000010e1c5000 _sigtramp + 2088262384
5  swift                    0x000000010b08fd11 swift::SILPassManager::runModulePass(swift::SILModuleTransform*) + 1025
6  swift                    0x000000010b09053e swift::SILPassManager::runOneIteration() + 686
7  swift                    0x000000010b09660e swift::runSILOptimizationPasses(swift::SILModule&) + 462
8  swift                    0x000000010adaa579 performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef<char const*>, int&) + 13193
9  swift                    0x000000010ada668d frontend_main(llvm::ArrayRef<char const*>, char const*, void*) + 2781
10 swift                    0x000000010ada20ac main + 1932
11 libdyld.dylib            0x00007fff8ff745ad start + 1



1.  While running SILModuleTransform "Closure Specialization".
Command failed due to signal: Segmentation fault: 11

出现错误的文件是以下 tabBarController.swift

这有助于我做出以下内容：如果用户按下标签栏按钮，则滚动视图将显示在顶部 .

import UIKit

class tapBarController: UITabBarController, UITabBarControllerDelegate {

    /// Determines whether the scrolling capability's enabled.
    var scrollEnabled: Bool = true

    private var previousIndex = 0

    override func viewDidLoad() {
        super.viewDidLoad()

        delegate = self
    }

    /*
     Always call "super" if you're overriding this method in your subclass.
     */
    func tabBarController(tabBarController: UITabBarController, didSelectViewController viewController: UIViewController) {

        guard scrollEnabled else {
            return
        }

        guard let index = viewControllers?.indexOf(viewController) else {
            return
        }

        if index == previousIndex {
            var scrollViews = [UIScrollView]()

            dispatch_async(dispatch_get_global_queue(QOS_CLASS_USER_INITIATED, 0), { [weak self] () in

                self?.iterateThroughSubviews(self?.view) { (scrollView) in
                    scrollViews.append(scrollView)
                }

                guard let scrollView = scrollViews.first else {
                    return
                }

                dispatch_async(dispatch_get_main_queue(), {
                    scrollView.setContentOffset(CGPointZero, animated: true)
                })
                })
        }

        previousIndex = index
    }

    /*
     Iterates through the view hierarchy in an attempt to locate a UIScrollView with "scrollsToTop" enabled.
     Since the functionality relies on "scrollsToTop", it plugs easily into existing architectures - you can
     control the behaviour by modifying "scrollsToTop" on your UIScrollViews.
     */
    private func iterateThroughSubviews(parentView: UIView?, onRecognition: (UIScrollView) -> Void) {
        guard let view = parentView else {
            return
        }

        for subview in view.subviews {
            if let scrollView = subview as? UIScrollView where scrollView.scrollsToTop == true {
                onRecognition(scrollView)
            }

            iterateThroughSubviews(subview, onRecognition: onRecognition)
        }
    }
}

如果我评论孔文件，那么我没有错误 . 此外，我无法从代码中找出错误是什么（直到2天前工作，它已存档） .

在我的iPhone甚至在模拟器上工作完美 . 任何的想法？