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ios - EXC_BAD_ACCESS 点击 uisearchbar 三下

转载 作者：IT王子 更新时间：2023-10-29 05:03:45 25 4
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我正在尝试将 UICollectionView 中的搜索栏实现为 UICollectionViewReusableView

这样我不使用 UISearchController 但我正在更改 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
}

我这样设置委托(delegate):

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
    }
}

变量 controller 是实现 UISearchBarDelegate 协议(protocol)的 UICollectionViewController

委托(delegate)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()
}

现在是我的问题!

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，它就会消失。就像我想要的那样。这也适用于第二次。

但是!

如果我第三次这样做，我会得到一个 EXC_BAD_ACCESS:

EXC_BAD_ACCESS (code=1, address=0x14ac0beb8)

我尝试打开启用僵尸对象，但未提供任何信息。我还尝试对 Zombie Objects 进行分析，它只是在没有任何明显信息的情况下崩溃。

请帮助我解决这个错误，或者给我进一步的调试说明。

编辑 1:

这是 lldb 调试器中 bt all 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。只需运行该项目并点击/取消几次搜索栏。

Download Project

视频:

Short gif showing crash

错误报告:rdar://problem/21673802

最佳答案

我在 iOS 8 中想出了一个解决方法。我发现只有当我的补充 View 的 kind 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 字符串时没有崩溃。我尝试了在 Swift 中显式创建一个 NSString 的明显想法，甚至尝试在 Swift 中创建一个 CFString 并桥接它。然而，这些努力都没有成功。

为了轻松验证这一点，请尝试将 TeacherSearchbarIdentifier 更改为来自 UIKit 的 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。例如:

// MyElementKinds.h

@import Foundation;

FOUNDATION_EXPORT NSString *const TeacherSearchbarIdentifier;
// MyElementKinds.m

#import "MyElementKinds.h"

NSString *const TeacherSearchbarIdentifier = @"TeacherSearchbarIdentifier";

关于ios - EXC_BAD_ACCESS 点击 uisearchbar 三下，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/31098831/

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