EXC_BAD_ACCESS三次点击uisearchbar

Question

我试图在UICollectionView中实现一个搜索栏作为UICollectionViewReusableView

这样我就不使用UISearchController但是我正在更改collectionview的数据源

在我的自定义布局中,我以这种方式添加搜索栏:

override func prepareLayout() {
    super.prepareLayout()
    var searchBarAttributes = UICollectionViewLayoutAttributes(forSupplementaryViewOfKind: TeacherSearchbarIdentifier, withIndexPath: NSIndexPath(forItem: 0, inSection: 0))
    searchBarAttributes.frame = CGRectMake(0, 0, collectionViewContentSize().width, 44)
    searchBarAttributes.zIndex = 100
    miscAttributes.append(searchBarAttributes)
}

override func layoutAttributesForElementsInRect(rect: CGRect) -> [AnyObject]? {
    var attributes = [UICollectionViewLayoutAttributes]()
    for (idx, attr) in enumerate(miscAttributes) {
        if CGRectIntersection(rect, attr.frame) != CGRectNull {
            attributes.append(attr)
        }
    }

    return attributes
}

我正在设置这样的委托:

func collectionView(collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, atIndexPath indexPath: NSIndexPath) -> UICollectionReusableView {
    var view = collectionView.dequeueReusableSupplementaryViewOfKind(kind, withReuseIdentifier: kind, forIndexPath: indexPath) as! UICollectionReusableView
    if kind == TeacherSearchbarIdentifier {
        controller.searchBar = (view as! TeacherSearchView).searchBar
        return view
    }
}

该变量controller是实现UISearchBarDelegate协议的UICollectionViewController

委托在searchBar变量的didSet中设置.这些是我的代表:

override func scrollViewDidScroll(scrollView: UIScrollView) {
    self.view.endEditing(true)
}

func searchBarShouldBeginEditing(searchBar: UISearchBar) -> Bool {
    searchBar.setShowsCancelButton(true, animated: true)
    return true
}

func searchBarShouldEndEditing(searchBar: UISearchBar) -> Bool {
    searchBar.setShowsCancelButton(false, animated: true)
    searchBar.resignFirstResponder()
    return true
}

func searchBarCancelButtonClicked(searchBar: UISearchBar) {
    searchBar.setShowsCancelButton(false, animated: true)
    searchBar.resignFirstResponder()
}

现在我的问题!

当我点击搜索栏时,会出现键盘.如果我按下取消按钮或滚动,它会消失.正如我想要的那样.这也是第二次.

但!

如果我第三次这样做,我会得到一个EXC_BAD_ACCESS:

我尝试启用"启用僵尸对象",但未提供任何信息.我也尝试过为Zombie Objects进行分析,它只是在没有任何明显信息的情况下崩溃.

请帮我解决这个错误,或者给我进一步的调试说明.

编辑1:

这是bt alllldb调试器中的输出:

    * thread #1: tid = 0x228fc, 0x000000019502fbd0 libobjc.A.dylib`objc_msgSend + 16, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x1cda8beb8)
    frame #0: 0x000000019502fbd0 libobjc.A.dylib`objc_msgSend + 16
    frame #1: 0x000000018328b2f4 CoreFoundation`-[__NSDictionaryM objectForKey:] + 84
    frame #2: 0x00000001884a21b8 UIKit`-[UICollectionView _visibleViewDictForElementCategory:elementKind:] + 96
    frame #3: 0x0000000187ff6644 UIKit`-[UICollectionView _indexPathForView:ofType:] + 160
    frame #4: 0x000000018849c3dc UIKit`-[UICollectionView _setIsAncestorOfFirstResponder:] + 792
    frame #5: 0x0000000187ed9418 UIKit`+[UIView(Internal) _setIsResponderAncestorOfFirstResponder:startingAtFirstResponder:] + 164
    frame #6: 0x0000000187ed925c UIKit`-[UIResponder(Static) _setFirstResponder:] + 56
    frame #7: 0x0000000187ed925c UIKit`-[UIResponder(Static) _setFirstResponder:] + 56
    frame #8: 0x0000000187ed925c UIKit`-[UIResponder(Static) _setFirstResponder:] + 56
    frame #9: 0x0000000187ed925c UIKit`-[UIResponder(Static) _setFirstResponder:] + 56
    frame #10: 0x0000000187ed925c UIKit`-[UIResponder(Static) _setFirstResponder:] + 56
    frame #11: 0x0000000187ed925c UIKit`-[UIResponder(Static) _setFirstResponder:] + 56
    frame #12: 0x0000000187ed925c UIKit`-[UIResponder(Static) _setFirstResponder:] + 56
    frame #13: 0x0000000187ed925c UIKit`-[UIResponder(Static) _setFirstResponder:] + 56
    frame #14: 0x0000000187ed925c UIKit`-[UIResponder(Static) _setFirstResponder:] + 56
    frame #15: 0x0000000187ed925c UIKit`-[UIResponder(Static) _setFirstResponder:] + 56
    frame #16: 0x0000000187ed925c UIKit`-[UIResponder(Static) _setFirstResponder:] + 56
    frame #17: 0x0000000187f1b194 UIKit`-[UITextField _becomeFirstResponder] + 60
    frame #18: 0x000000018800f300 UIKit`-[UISearchBarTextField _becomeFirstResponder] + 108
    frame #19: 0x0000000187e9ad28 UIKit`-[UIResponder becomeFirstResponder] + 392
    frame #20: 0x0000000187e9b0ac UIKit`-[UIView(Hierarchy) becomeFirstResponder] + 124
    frame #21: 0x0000000187f19de4 UIKit`-[UITextField becomeFirstResponder] + 68
    frame #22: 0x0000000187fc9fc4 UIKit`-[UITextInteractionAssistant(UITextInteractionAssistant_Internal) setFirstResponderIfNecessary] + 200
    frame #23: 0x0000000187fc962c UIKit`-[UITextInteractionAssistant(UITextInteractionAssistant_Internal) oneFingerTap:] + 1736
    frame #24: 0x0000000187faf070 UIKit`_UIGestureRecognizerSendActions + 276
    frame #25: 0x0000000187e486b4 UIKit`-[UIGestureRecognizer _updateGestureWithEvent:buttonEvent:] + 580
    frame #26: 0x00000001882b938c UIKit`___UIGestureRecognizerUpdate_block_invoke662 + 60
    frame #27: 0x0000000187e0c418 UIKit`_UIGestureRecognizerRemoveObjectsFromArrayAndApplyBlocks + 292
    frame #28: 0x0000000187e0a7c4 UIKit`_UIGestureRecognizerUpdate + 2504
    frame #29: 0x0000000187e4682c UIKit`-[UIWindow _sendGesturesForEvent:] + 1044
    frame #30: 0x0000000187e45ee4 UIKit`-[UIWindow sendEvent:] + 660
    frame #31: 0x0000000187e19120 UIKit`-[UIApplication sendEvent:] + 264
    frame #32: 0x00000001880ba2b8 UIKit`_UIApplicationHandleEventFromQueueEvent + 15424
    frame #33: 0x0000000187e17634 UIKit`_UIApplicationHandleEventQueue + 1716
    frame #34: 0x0000000183358240 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24
    frame #35: 0x00000001833574e4 CoreFoundation`__CFRunLoopDoSources0 + 264
    frame #36: 0x0000000183355594 CoreFoundation`__CFRunLoopRun + 712
    frame #37: 0x00000001832812d4 CoreFoundation`CFRunLoopRunSpecific + 396
    frame #38: 0x000000018ccdf6fc GraphicsServices`GSEventRunModal + 168
    frame #39: 0x0000000187e7ef40 UIKit`UIApplicationMain + 1488
  * frame #40: 0x00000001000f0798 My-Project`main + 164 at AppDelegate.swift:14
    frame #41: 0x00000001956c6a08 libdyld.dylib`start + 4

  thread #2: tid = 0x22939, 0x00000001957c4c24 libsystem_kernel.dylib`kevent64 + 8, queue = 'com.apple.libdispatch-manager'
    frame #0: 0x00000001957c4c24 libsystem_kernel.dylib`kevent64 + 8
    frame #1: 0x000000010083a588 libdispatch.dylib`_dispatch_mgr_invoke + 276
    frame #2: 0x000000010082b09c libdispatch.dylib`_dispatch_mgr_thread + 52

  thread #8: tid = 0x229d9, 0x00000001957dfc78 libsystem_kernel.dylib`__workq_kernreturn + 8
    frame #0: 0x00000001957dfc78 libsystem_kernel.dylib`__workq_kernreturn + 8
    frame #1: 0x00000001958792dc libsystem_pthread.dylib`_pthread_wqthread + 992

  thread #7: tid = 0x229da, 0x00000001957dfc78 libsystem_kernel.dylib`__workq_kernreturn + 8
    frame #0: 0x00000001957dfc78 libsystem_kernel.dylib`__workq_kernreturn + 8
    frame #1: 0x00000001958792dc libsystem_pthread.dylib`_pthread_wqthread + 992

  thread #9: tid = 0x229df, 0x00000001957dfc78 libsystem_kernel.dylib`__workq_kernreturn + 8
    frame #0: 0x00000001957dfc78 libsystem_kernel.dylib`__workq_kernreturn + 8
    frame #1: 0x00000001958792dc libsystem_pthread.dylib`_pthread_wqthread + 992

  thread #10: tid = 0x229e1, 0x00000001957dfc78 libsystem_kernel.dylib`__workq_kernreturn + 8
    frame #0: 0x00000001957dfc78 libsystem_kernel.dylib`__workq_kernreturn + 8
    frame #1: 0x00000001958792dc libsystem_pthread.dylib`_pthread_wqthread + 992

  thread #11: tid = 0x229e2, 0x00000001957dfc78 libsystem_kernel.dylib`__workq_kernreturn + 8
    frame #0: 0x00000001957dfc78 libsystem_kernel.dylib`__workq_kernreturn + 8
    frame #1: 0x00000001958792dc libsystem_pthread.dylib`_pthread_wqthread + 992

  thread #12: tid = 0x229e3, 0x00000001957c4e0c libsystem_kernel.dylib`mach_msg_trap + 8, name = 'com.apple.NSURLConnectionLoader'
    frame #0: 0x00000001957c4e0c libsystem_kernel.dylib`mach_msg_trap + 8
    frame #1: 0x00000001957c4c88 libsystem_kernel.dylib`mach_msg + 72
    frame #2: 0x0000000183357724 CoreFoundation`__CFRunLoopServiceMachPort + 200
    frame #3: 0x0000000183355678 CoreFoundation`__CFRunLoopRun + 940
    frame #4: 0x00000001832812d4 CoreFoundation`CFRunLoopRunSpecific + 396
    frame #5: 0x0000000182d5e594 CFNetwork`+[NSURLConnection(Loader) _resourceLoadLoop:] + 440
    frame #6: 0x00000001842a1db8 Foundation`__NSThread__main__ + 1072
    frame #7: 0x000000019587bdc8 libsystem_pthread.dylib`_pthread_body + 164
    frame #8: 0x000000019587bd24 libsystem_pthread.dylib`_pthread_start + 160

  thread #13: tid = 0x229e6, 0x00000001957df498 libsystem_kernel.dylib`__select + 8, name = 'com.apple.CFSocket.private'
    frame #0: 0x00000001957df498 libsystem_kernel.dylib`__select + 8
    frame #1: 0x000000018335d128 CoreFoundation`__CFSocketManager + 672
    frame #2: 0x000000019587bdc8 libsystem_pthread.dylib`_pthread_body + 164
    frame #3: 0x000000019587bd24 libsystem_pthread.dylib`_pthread_start + 160

编辑2:我创建了一个产生此错误的独立项目.只需运行该项目,然后点击/取消搜索栏几次.

下载项目

视频:

Bugreport:rdar:// problem/21673802

Answer 1

我在 iOS 8 中想出了一个解决方法。我发现只有当kind我的补充视图的字符串是 Swift 字符串时才会发生崩溃。当我使用桥接到 Swift 的 Objective-C 字符串时，没有发生崩溃。我尝试了在 Swift 中显式创建 a 的明显想法NSString，甚至尝试CFString在 Swift 中创建 a 并桥接它。然而，这些努力都没有成功。

为了轻松验证这一点，请尝试TeacherSearchbarIdentifier从 UIKit 更改为 Objective-C 字符串，例如UICollectionElementKindSectionHeader.

更严格的解决方法是为您的用例创建 Objective-C 字符串并将其公开给 Swift。举个例子：

// MyElementKinds.h

@import Foundation;

FOUNDATION_EXPORT NSString *const TeacherSearchbarIdentifier;

// MyElementKinds.m

#import "MyElementKinds.h"

NSString *const TeacherSearchbarIdentifier = @"TeacherSearchbarIdentifier";