滚动浏览UITableView仅在iPhone 5C上导致异常和崩溃 [英] Scrolling through UITableView causes Exception and Crash only on iPhone 5C
本文介绍了滚动浏览UITableView仅在iPhone 5C上导致异常和崩溃的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
当用户滚动我的 UITableView 太快或者点击状态栏跳转到表格顶部时，会抛出异常。我只是在iPhone 5C设备上看到这次崩溃。我无法在4S，5或32位模拟器上重现它。
使用All Exceptions断点，我能够打印出所有回溯我可以通过崩溃递增帧指针。因为在回溯中没有我的应用程序的痕迹（除了主要），我认为这是一个Apple bug，与 [NSRLEArray objectAtIndex：effectiveRange：] 有关。 这个问题的作者似乎与操作系统有同样的问题X应用程序，以及建议查看我的应用程序中的 NSAttributedString 用法。我在表格视图单元格中使用 NSAttributedStrings 来超链接 UITextView 中的某些字符串。但如果这是 NSAttributedString 的一般问题，这不会导致其他iOS设备崩溃吗？
Backtrace：
（lldb）bt
* thread＃1：tid = 0x2e57bd，0x3978e6a0 libobjc.A.dylib `objc_exception_throw，queue ='com.apple.main-thread'，stop reason = breakpoint 1.1
frame＃0：0x3978e6a0 libobjc.A.dylib`objc_exception_throw
frame＃1：0x2f431dc4 CoreFoundation` + [NSException raise：format：] + 112
frame＃2：0x2fd55230 Foundation`- [NSRLEArray objectAtIndex：effectiveRange：] + 120
frame＃3：0x2fd71d76 Foundation`- [NSConcreteMutableAttributedString addAttribute：value：range：] + 198
帧＃4：0x36d7b278 UIFoundation`__50- [NSConcreteTextStorage addAttribute：value：range：] _ block_invoke + 156
frame＃5：0x36d7b102 UIFoundation`- [NSConcreteTextStorage addAttribute：value：range：] + 170
帧＃6：0x337fc02e DataDetectorsUI`- [DDTextKitOperation _addResultsToAttributes] + 2 66
帧＃7：0x337fc1d6 DataDetectorsUI`__46- [DDTextKitOperation doURLificationOnDocument] _block_invoke_2 + 26
frame＃8：0x36d79a5e UIFoundation`- [NSTextStorage（ActorSupport）coordinateAccess：] + 34
frame＃9 ：0x337fc1b8 DataDetectorsUI`__46- [DDTextKitOperation doURLificationOnDocument] _block_invoke + 116
frame＃10：0x39c78bde libdispatch.dylib`_dispatch_barrier_sync_f_slow_invoke + 66
frame＃11：0x39c730ae libdispatch.dylib`_dispatch_client_callout + 22
frame ＃12：0x39c759a8 libdispatch.dylib`_dispatch_main_queue_callback_4CF + 268
帧＃13：0x2f3fc5b0 CoreFoundation`__CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 8
帧＃14：0x2f3fae7c CoreFoundation`__CFRunLoopRun + 1308
帧＃15：0x2f365470 CoreFoundation` CFRunLoopRunSpecific + 524
帧＃16：0x2f365252 CoreFoundation`CFRunLoopRunInMode + 106
帧＃17：0x3409f2ea GraphicsServices`GSEventRunModal + 138
帧＃18：0x31c 1a844 UIKit`UIApplicationMain + 1136
* frame＃19：0x000bffb4 [AppName]`main（argc = 1，argv = 0x27d4ecec）+ 116 at main.m:16
（lldb）bt
* thread＃1：tid = 0x2e57bd，0x39153994 libc ++ abi.dylib`__cxa_throw，queue ='com.apple.main-thread'，stop reason = breakpoint 1.2
frame＃0：0x39153994 libc ++ abi。 dylib`__cxa_throw
frame＃1：0x3978e79a libobjc.A.dylib`objc_exception_throw + 250
frame＃2：0x2f431dc4 CoreFoundation` + [NSException raise：format：] + 112
frame＃3： 0x2fd55230 Foundation`- [NSRLEArray objectAtIndex：effectiveRange：] + 120
frame＃4：0x2fd71d76 Foundation`- [NSConcreteMutableAttributedString addAttribute：value：range：] + 198
frame＃5：0x36d7b278 UIFoundation`__50- [ NSConcreteTextStorage addAttribute：value：range：] _ block_invoke + 156
frame＃6：0x36d7b102 UIFoundation`- [NSConcreteTextStorage addAttribute：value：range：] + 170
frame＃7：0x337fc02e DataDetectorsUI`- [DDTextKitOperation _addResultsToAttribute s] + 266
帧＃8：0x337fc1d6 DataDetectorsUI`__46- [DDTextKitOperation doURLificationOnDocument] _block_invoke_2 + 26
frame＃9：0x36d79a5e UIFoundation`- [NSTextStorage（ActorSupport）coordinateAccess：] + 34
帧＃10：0x337fc1b8 DataDetectorsUI`__46- [DDTextKitOperation doURLificationOnDocument] _block_invoke + 116
frame＃11：0x39c78bde libdispatch.dylib`_dispatch_barrier_sync_f_slow_invoke + 66
frame＃12：0x39c730ae libdispatch.dylib`_dispatch_client_callout + 22
帧＃13：0x39c759a8 libdispatch.dylib`_dispatch_main_queue_callback_4CF + 268
帧＃14：0x2f3fc5b0 CoreFoundation`__CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 8
帧＃15：0x2f3fae7c CoreFoundation`__CFRunLoopRun + 1308
帧＃16： 0x2f365470 CoreFoundation`CFRunLoopRunSpecific + 524
frame＃17：0x2f365252 CoreFoundation`CFRunLoopRunInMode + 106
frame＃18：0x3409f2ea GraphicsServices`GSEventRunModal + 138
frame＃19 ：0x31c1a844 UIKit`UIApplicationMain + 1136
*帧＃20：0x000bffb4 [AppName]`main（argc = 1，argv = 0x27d4ecec）+ 116 at main.m:16
（lldb）bt
*线程＃1：tid = 0x2e57bd，0x3978e6a0 libobjc.A.dylib`objc_exception_throw，queue ='com.apple.main-thread'，stop reason = breakpoint 1.1
frame＃0：0x3978e6a0 libobjc.A.dylib `objc_exception_throw
帧＃1：0x2f431b88 CoreFoundation`- [NSException raise] + 8
帧＃2：0x36d7b19a UIFoundation`- [NSConcreteTextStorage addAttribute：value：range：] + 322
frame＃3 ：0x337fc02e DataDetectorsUI`- [DDTextKitOperation _addResultsToAttributes] + 266
frame＃4：0x337fc1d6 DataDetectorsUI`__46- [DDTextKitOperation doURLificationOnDocument] _block_invoke_2 + 26
frame＃5：0x36d79a5e UIFoundation`- [NSTextStorage（ActorSupport）coordinateAccess： ] + 34
帧＃6：0x337fc1b8 DataDetectorsUI`__46- [DDTextKitOperation doURLificationOnDocument] _block_invoke + 116
frame＃7：0x39c78bde libdisp atch.dylib`_dispatch_barrier_sync_f_slow_invoke + 66
frame＃8：0x39c730ae libdispatch.dylib`_dispatch_client_callout + 22
frame＃9：0x39c759a8 libdispatch.dylib`_dispatch_main_queue_callback_4CF + 268
frame＃10：0x2f3fc5b0 CoreFoundation` __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 8
帧＃11：0x2f3fae7c CoreFoundation`__CFRunLoopRun + 1308
帧＃12：0x2f365470 CoreFoundation`CFRunLoopRunSpecific + 524
帧＃13：0x2f365252 CoreFoundation`CFRunLoopRunInMode + 106
帧＃14：0x3409f2ea GraphicsServices`GSEventRunModal + 138
frame＃15：0x31c1a844 UIKit`UIApplicationMain + 1136
* frame＃16：0x000bffb4 [AppName]`main（argc = 1，argv = 0x27d4ecec）+ 116 at main.m：16
（lldb）bt
* thread＃1：tid = 0x2e57bd，0x39153994 libc ++ abi.dylib`__cxa_throw，queue ='com.apple.main-thread'，停止原因=断点1.2
帧＃0：0x39153994 libc ++ abi.dylib`__cxa_throw
帧＃1：0x3978e79a lib objc.A.dylib`objc_exception_throw + 250
帧＃2：0x2f431b88 CoreFoundation`- [NSException raise] + 8
frame＃3：0x36d7b19a UIFoundation`- [NSConcreteTextStorage addAttribute：value：range：] + 322
frame＃4：0x337fc02e DataDetectorsUI`- [DDTextKitOperation _addResultsToAttributes] + 266
frame＃5：0x337fc1d6 DataDetectorsUI`__46- [DDTextKitOperation doURLificationOnDocument] _block_invoke_2 + 26
frame＃6：0x36d79a5e UIFoundation`- [NSTextStorage（ActorSupport）coordinateAccess：] + 34
frame＃7：0x337fc1b8 DataDetectorsUI`__46- [DDTextKitOperation doURLificationOnDocument] _block_invoke + 116
frame＃8：0x39c78bde libdispatch.dylib`_dispatch_barrier_sync_f_slow_invoke + 66
帧＃9：0x39c730ae libdispatch.dylib`_dispatch_client_callout + 22
帧＃10：0x39c759a8 libdispatch.dylib`_dispatch_main_queue_callback_4CF + 268
帧＃11：0x2f3fc5b0 CoreFoundation`__CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 8
帧＃12：0x2f3fae7c CoreFoundation`__CFRunLoopRun + 1308
帧＃13：0x2f365470 CoreFoundation`CFRunLoopRunSpecific + 524
帧＃14：0x2f365252 CoreFoundation`CFRunLoopRunInMode + 106
帧＃15：0x3409f2ea GraphicsServices`GSEventRunModal + 138
帧＃16：0x31c1a844 UIKit`UIApplicationMain + 1136
*帧＃17：0x000bffb4 [AppName]`main（argc = 1，argv = 0x27d4ecec）+ 116 at main.m:16
（lldb）bt
* thread＃1：tid = 0x2e57bd，0x39d3e1fc libsystem_kernel.dylib`__pthread_kill + 8，queue ='com.apple.main-thread'，stop reason = signal SIGABRT
frame ＃0：0x39d3e1fc libsystem_kernel.dylib`__pthread_kill + 8
frame＃1：0x39da5a52 libsystem_pthread.dylib`pthread_kill + 58
frame＃2：0x39cef02c libsystem_c.dylib`abort + 76
frame＃3 ：0x001f32ba [AppName]`uncaught_exception_handler + 26
frame＃4：0x2f432184 CoreFoundation`__handleUncaughtException + 580
frame＃5：0x3978e926 libobjc.A.dylib`_ob jc_terminate（）+ 174
帧＃6：0x391541b2 libc ++ abi.dylib`std :: __ terminate（void（*）（））+ 78
frame＃7：0x39153d16 libc ++ abi.dylib `__cxa_rethrow + 102
帧＃8：0x3978e80e libobjc.A.dylib`objc_exception_rethrow + 42
帧＃9：0x36d7b150 UIFoundation`- [NSConcreteTextStorage addAttribute：value：range：] + 248
frame ＃10：0x337fc02e DataDetectorsUI`- [DDTextKitOperation _addResultsToAttributes] + 266
frame＃11：0x337fc1d6 DataDetectorsUI`__46- [DDTextKitOperation doURLificationOnDocument] _block_invoke_2 + 26
frame＃12：0x36d79a5e UIFoundation`- [NSTextStorage（ActorSupport） coordinateAccess：] + 34
frame＃13：0x337fc1b8 DataDetectorsUI`__46- [DDTextKitOperation doURLificationOnDocument] _block_invoke + 116
frame＃14：0x39c78bde libdispatch.dylib`_dispatch_barrier_sync_f_slow_invoke + 66
frame＃15：0x39c730ae libdispatch.dylib`_dispatch_client_callout + 22
frame＃16：0x39c759a8 libdispatch.dylib`_dispatc h_main_queue_callback_4CF + 268
帧＃17：0x2f3fc5b0 CoreFoundation`__CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 8
帧＃18：0x2f3fae7c CoreFoundation`__CFRunLoopRun + 1308
帧＃19：0x2f365470 CoreFoundation`CFRunLoopRunSpecific + 524
帧＃20：0x2f365252 CoreFoundation`CFRunLoopRunInMode + 106
帧＃21：0x3409f2ea GraphicsServices`GSEventRunModal + 138
帧＃22：0x31c1a844 UIKit`UIApplicationMain + 1136
*帧＃23：0x000bffb4 [AppName] `main（argc = 1，argv = 0x27d4ecec）+ 116 at main.m:16
（lldb）bt
* thread＃22：tid = 0x2e57ea，0x39da2cbc libsystem_pthread.dylib`start_wqthread，stop reason = signal SIGABRT
* frame＃0：0x39da2cbc libsystem_pthread.dylib`start_wqthread
这是我的地方在代码
tweetTextView.attributedText = [[NSAttributedString alloc] initWithString： tweetTextView.text];
...
- （void）findHashtagsAndAtMentionsInTweetText：（UITextView *）textView {
NSString * tweetText = textView.text;
NSError * error = nil;
NSRegularExpression * regex = [NSRegularExpression regularExpressionWithPattern：@（@（\\\\ +））|（^ | \\ W）（＃| \\\\\\\ \\\\ {L} \\ w *）选项：0错误：&错误];
NSArray * matches = [regex matchesInString：tweetText options：0 range：NSMakeRange（0，tweetText.length）];
NSMutableAttributedString * myTagOrMention = [[NSMutableAttributedString alloc] initWithString：tweetTextView.text];
for（NSTextCheckingResult *匹配中匹配）{
NSRange wordRange = [match rangeAtIndex：0]; //导致崩溃？
NSString * word = [tweetText substringWithRange：wordRange];
if（[word rangeOfString：@@]。location！= NSNotFound）{
// @提及
//删除空格和@
NSString * formattedTag = [NSString stringWithFormat：@％@，[[word stringByReplacingOccurrencesOfString：@withString：@] stringByReplacingOccurrencesOfString：@@withString：@]];
NSString * tweetContets = tweetTextView.text;
NSRange range = [tweetContets rangeOfString：word];
if（[[UIApplication sharedApplication] canOpenURL：[NSURL URLWithString：@twitter：//]]）{
NSString * twitterAppURL = [NSString stringWithFormat：@％@％@ ，@twitter：// user？screen_name =，formattedTag];
[myTagOrMention addAttribute：NSLinkAttributeName value：twitterAppURL range：range];
} else {
[myTagOrMention addAttribute：NSLinkAttributeName value：[NSString stringWithFormat：@％@％@，@http://mobile.twitter.com/，formattedTag]范围：范围];
}
tweetTextView.attributedText = myTagOrMention;
} else {
// hashtag
//删除whitespaces和pound
NSString * formattedTag = [NSString stringWithFormat：@％@， [[word stringByReplacingOccurrencesOfString：@withString：@] stringByReplacingOccurrencesOfString：@＃withString：@]];
NSString * tweetContets = tweetTextView.text;
NSRange range = [tweetContets rangeOfString：word];
[myTagOrMention addAttribute：NSLinkAttributeName value：[NSString stringWithFormat：@％@％@％@％@，@http://twitter.com/search/，@？q = ％23，formattedTag，@& s = hash] range：range];
tweetTextView.attributedText = myTagOrMention;
}
}
解决方案
错误不在您发布的代码中。当一个 UITextView 在其链接仍然生成时被重用时会发生错误，这是异步完成的。
查看这些类似的Stack Overflow问题：
许多用户报告将文本视图的文本属性设置为<$ c单元格的 prepareForReuse 方法中的$ c> nil 解决了该问题。或者，您可以使用像 TTTAttributedLabel 这样的库而不是文本视图。
它只出现在iPhone 5C可能是红鲱鱼。我打赌这个设备仍在运行iOS 7，其他设备已经更新到更新版本的iOS。
在旁注中，可能存在正则表达式未涵盖的边缘情况。我会删除你的twitter解析方法，并将其替换为官方 twitter-text -objc 库。
There is an exception being thrown when a user scrolls through my UITableView too fast or taps the status bar to jump to the top of the table. I am only seeing this crash on an iPhone 5C device. I can't reproduce it on the 4S, 5, or with the 32-bit simulator.
Using the "All Exceptions" breakpoint, I was able to print out all the backtraces I could incrementing the frame pointer through the crash. Because there is no trace of my app in the backtrace (besides the main), I assume this is an Apple bug, something to do with [NSRLEArray objectAtIndex:effectiveRange:]. The author of this question seemed to have the same problem with an OS X application, and a comment suggested looking at the NSAttributedString usage in my app. I do use NSAttributedStrings in my table view cells to hyperlink certain strings in a UITextView. But if it was a general issue with NSAttributedString, wouldn't this also cause a crash on other iOS devices?
Backtrace:
(lldb) bt
* thread #1: tid = 0x2e57bd, 0x3978e6a0 libobjc.A.dylib`objc_exception_throw, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1
frame #0: 0x3978e6a0 libobjc.A.dylib`objc_exception_throw
frame #1: 0x2f431dc4 CoreFoundation`+[NSException raise:format:] + 112
frame #2: 0x2fd55230 Foundation`-[NSRLEArray objectAtIndex:effectiveRange:] + 120
frame #3: 0x2fd71d76 Foundation`-[NSConcreteMutableAttributedString addAttribute:value:range:] + 198
frame #4: 0x36d7b278 UIFoundation`__50-[NSConcreteTextStorage addAttribute:value:range:]_block_invoke + 156
frame #5: 0x36d7b102 UIFoundation`-[NSConcreteTextStorage addAttribute:value:range:] + 170
frame #6: 0x337fc02e DataDetectorsUI`-[DDTextKitOperation _addResultsToAttributes] + 266
frame #7: 0x337fc1d6 DataDetectorsUI`__46-[DDTextKitOperation doURLificationOnDocument]_block_invoke_2 + 26
frame #8: 0x36d79a5e UIFoundation`-[NSTextStorage(ActorSupport) coordinateAccess:] + 34
frame #9: 0x337fc1b8 DataDetectorsUI`__46-[DDTextKitOperation doURLificationOnDocument]_block_invoke + 116
frame #10: 0x39c78bde libdispatch.dylib`_dispatch_barrier_sync_f_slow_invoke + 66
frame #11: 0x39c730ae libdispatch.dylib`_dispatch_client_callout + 22
frame #12: 0x39c759a8 libdispatch.dylib`_dispatch_main_queue_callback_4CF + 268
frame #13: 0x2f3fc5b0 CoreFoundation`__CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 8
frame #14: 0x2f3fae7c CoreFoundation`__CFRunLoopRun + 1308
frame #15: 0x2f365470 CoreFoundation`CFRunLoopRunSpecific + 524
frame #16: 0x2f365252 CoreFoundation`CFRunLoopRunInMode + 106
frame #17: 0x3409f2ea GraphicsServices`GSEventRunModal + 138
frame #18: 0x31c1a844 UIKit`UIApplicationMain + 1136
* frame #19: 0x000bffb4 [AppName]`main(argc=1, argv=0x27d4ecec) + 116 at main.m:16
(lldb) bt
* thread #1: tid = 0x2e57bd, 0x39153994 libc++abi.dylib`__cxa_throw, queue = 'com.apple.main-thread', stop reason = breakpoint 1.2
frame #0: 0x39153994 libc++abi.dylib`__cxa_throw
frame #1: 0x3978e79a libobjc.A.dylib`objc_exception_throw + 250
frame #2: 0x2f431dc4 CoreFoundation`+[NSException raise:format:] + 112
frame #3: 0x2fd55230 Foundation`-[NSRLEArray objectAtIndex:effectiveRange:] + 120
frame #4: 0x2fd71d76 Foundation`-[NSConcreteMutableAttributedString addAttribute:value:range:] + 198
frame #5: 0x36d7b278 UIFoundation`__50-[NSConcreteTextStorage addAttribute:value:range:]_block_invoke + 156
frame #6: 0x36d7b102 UIFoundation`-[NSConcreteTextStorage addAttribute:value:range:] + 170
frame #7: 0x337fc02e DataDetectorsUI`-[DDTextKitOperation _addResultsToAttributes] + 266
frame #8: 0x337fc1d6 DataDetectorsUI`__46-[DDTextKitOperation doURLificationOnDocument]_block_invoke_2 + 26
frame #9: 0x36d79a5e UIFoundation`-[NSTextStorage(ActorSupport) coordinateAccess:] + 34
frame #10: 0x337fc1b8 DataDetectorsUI`__46-[DDTextKitOperation doURLificationOnDocument]_block_invoke + 116
frame #11: 0x39c78bde libdispatch.dylib`_dispatch_barrier_sync_f_slow_invoke + 66
frame #12: 0x39c730ae libdispatch.dylib`_dispatch_client_callout + 22
frame #13: 0x39c759a8 libdispatch.dylib`_dispatch_main_queue_callback_4CF + 268
frame #14: 0x2f3fc5b0 CoreFoundation`__CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 8
frame #15: 0x2f3fae7c CoreFoundation`__CFRunLoopRun + 1308
frame #16: 0x2f365470 CoreFoundation`CFRunLoopRunSpecific + 524
frame #17: 0x2f365252 CoreFoundation`CFRunLoopRunInMode + 106
frame #18: 0x3409f2ea GraphicsServices`GSEventRunModal + 138
frame #19: 0x31c1a844 UIKit`UIApplicationMain + 1136
* frame #20: 0x000bffb4 [AppName]`main(argc=1, argv=0x27d4ecec) + 116 at main.m:16
(lldb) bt
* thread #1: tid = 0x2e57bd, 0x3978e6a0 libobjc.A.dylib`objc_exception_throw, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1
frame #0: 0x3978e6a0 libobjc.A.dylib`objc_exception_throw
frame #1: 0x2f431b88 CoreFoundation`-[NSException raise] + 8
frame #2: 0x36d7b19a UIFoundation`-[NSConcreteTextStorage addAttribute:value:range:] + 322
frame #3: 0x337fc02e DataDetectorsUI`-[DDTextKitOperation _addResultsToAttributes] + 266
frame #4: 0x337fc1d6 DataDetectorsUI`__46-[DDTextKitOperation doURLificationOnDocument]_block_invoke_2 + 26
frame #5: 0x36d79a5e UIFoundation`-[NSTextStorage(ActorSupport) coordinateAccess:] + 34
frame #6: 0x337fc1b8 DataDetectorsUI`__46-[DDTextKitOperation doURLificationOnDocument]_block_invoke + 116
frame #7: 0x39c78bde libdispatch.dylib`_dispatch_barrier_sync_f_slow_invoke + 66
frame #8: 0x39c730ae libdispatch.dylib`_dispatch_client_callout + 22
frame #9: 0x39c759a8 libdispatch.dylib`_dispatch_main_queue_callback_4CF + 268
frame #10: 0x2f3fc5b0 CoreFoundation`__CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 8
frame #11: 0x2f3fae7c CoreFoundation`__CFRunLoopRun + 1308
frame #12: 0x2f365470 CoreFoundation`CFRunLoopRunSpecific + 524
frame #13: 0x2f365252 CoreFoundation`CFRunLoopRunInMode + 106
frame #14: 0x3409f2ea GraphicsServices`GSEventRunModal + 138
frame #15: 0x31c1a844 UIKit`UIApplicationMain + 1136
* frame #16: 0x000bffb4 [AppName]`main(argc=1, argv=0x27d4ecec) + 116 at main.m:16
(lldb) bt
* thread #1: tid = 0x2e57bd, 0x39153994 libc++abi.dylib`__cxa_throw, queue = 'com.apple.main-thread', stop reason = breakpoint 1.2
frame #0: 0x39153994 libc++abi.dylib`__cxa_throw
frame #1: 0x3978e79a libobjc.A.dylib`objc_exception_throw + 250
frame #2: 0x2f431b88 CoreFoundation`-[NSException raise] + 8
frame #3: 0x36d7b19a UIFoundation`-[NSConcreteTextStorage addAttribute:value:range:] + 322
frame #4: 0x337fc02e DataDetectorsUI`-[DDTextKitOperation _addResultsToAttributes] + 266
frame #5: 0x337fc1d6 DataDetectorsUI`__46-[DDTextKitOperation doURLificationOnDocument]_block_invoke_2 + 26
frame #6: 0x36d79a5e UIFoundation`-[NSTextStorage(ActorSupport) coordinateAccess:] + 34
frame #7: 0x337fc1b8 DataDetectorsUI`__46-[DDTextKitOperation doURLificationOnDocument]_block_invoke + 116
frame #8: 0x39c78bde libdispatch.dylib`_dispatch_barrier_sync_f_slow_invoke + 66
frame #9: 0x39c730ae libdispatch.dylib`_dispatch_client_callout + 22
frame #10: 0x39c759a8 libdispatch.dylib`_dispatch_main_queue_callback_4CF + 268
frame #11: 0x2f3fc5b0 CoreFoundation`__CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 8
frame #12: 0x2f3fae7c CoreFoundation`__CFRunLoopRun + 1308
frame #13: 0x2f365470 CoreFoundation`CFRunLoopRunSpecific + 524
frame #14: 0x2f365252 CoreFoundation`CFRunLoopRunInMode + 106
frame #15: 0x3409f2ea GraphicsServices`GSEventRunModal + 138
frame #16: 0x31c1a844 UIKit`UIApplicationMain + 1136
* frame #17: 0x000bffb4 [AppName]`main(argc=1, argv=0x27d4ecec) + 116 at main.m:16
(lldb) bt
* thread #1: tid = 0x2e57bd, 0x39d3e1fc libsystem_kernel.dylib`__pthread_kill + 8, queue = 'com.apple.main-thread', stop reason = signal SIGABRT
frame #0: 0x39d3e1fc libsystem_kernel.dylib`__pthread_kill + 8
frame #1: 0x39da5a52 libsystem_pthread.dylib`pthread_kill + 58
frame #2: 0x39cef02c libsystem_c.dylib`abort + 76
frame #3: 0x001f32ba [AppName]`uncaught_exception_handler + 26
frame #4: 0x2f432184 CoreFoundation`__handleUncaughtException + 580
frame #5: 0x3978e926 libobjc.A.dylib`_objc_terminate() + 174
frame #6: 0x391541b2 libc++abi.dylib`std::__terminate(void (*)()) + 78
frame #7: 0x39153d16 libc++abi.dylib`__cxa_rethrow + 102
frame #8: 0x3978e80e libobjc.A.dylib`objc_exception_rethrow + 42
frame #9: 0x36d7b150 UIFoundation`-[NSConcreteTextStorage addAttribute:value:range:] + 248
frame #10: 0x337fc02e DataDetectorsUI`-[DDTextKitOperation _addResultsToAttributes] + 266
frame #11: 0x337fc1d6 DataDetectorsUI`__46-[DDTextKitOperation doURLificationOnDocument]_block_invoke_2 + 26
frame #12: 0x36d79a5e UIFoundation`-[NSTextStorage(ActorSupport) coordinateAccess:] + 34
frame #13: 0x337fc1b8 DataDetectorsUI`__46-[DDTextKitOperation doURLificationOnDocument]_block_invoke + 116
frame #14: 0x39c78bde libdispatch.dylib`_dispatch_barrier_sync_f_slow_invoke + 66
frame #15: 0x39c730ae libdispatch.dylib`_dispatch_client_callout + 22
frame #16: 0x39c759a8 libdispatch.dylib`_dispatch_main_queue_callback_4CF + 268
frame #17: 0x2f3fc5b0 CoreFoundation`__CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 8
frame #18: 0x2f3fae7c CoreFoundation`__CFRunLoopRun + 1308
frame #19: 0x2f365470 CoreFoundation`CFRunLoopRunSpecific + 524
frame #20: 0x2f365252 CoreFoundation`CFRunLoopRunInMode + 106
frame #21: 0x3409f2ea GraphicsServices`GSEventRunModal + 138
frame #22: 0x31c1a844 UIKit`UIApplicationMain + 1136
* frame #23: 0x000bffb4 [AppName]`main(argc=1, argv=0x27d4ecec) + 116 at main.m:16
(lldb) bt
* thread #22: tid = 0x2e57ea, 0x39da2cbc libsystem_pthread.dylib`start_wqthread, stop reason = signal SIGABRT
* frame #0: 0x39da2cbc libsystem_pthread.dylib`start_wqthread
Here is where I set the attributed string:
// earlier in the code
tweetTextView.attributedText = [[NSAttributedString alloc] initWithString:tweetTextView.text];
...
-(void)findHashtagsAndAtMentionsInTweetText:(UITextView *)textView {
NSString *tweetText = textView.text;
NSError *error = nil;
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"(@(\\w+))|(^|\\W)(#|\\uFF03)(\\w*\\p{L}\\w*)" options:0 error:&error];
NSArray *matches = [regex matchesInString:tweetText options:0 range:NSMakeRange(0, tweetText.length)];
NSMutableAttributedString * myTagOrMention = [[NSMutableAttributedString alloc] initWithString:tweetTextView.text];
for (NSTextCheckingResult *match in matches) {
NSRange wordRange = [match rangeAtIndex:0]; // causing crash?
NSString* word = [tweetText substringWithRange:wordRange];
if([word rangeOfString:@"@"].location != NSNotFound) {
// @ mention
// remove whitespaces and @
NSString *formattedTag = [NSString stringWithFormat:@"%@", [[word stringByReplacingOccurrencesOfString:@" " withString:@""] stringByReplacingOccurrencesOfString:@"@" withString:@""]];
NSString *tweetContets = tweetTextView.text;
NSRange range = [tweetContets rangeOfString:word];
if([[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@"twitter://"]]) {
NSString *twitterAppURL = [NSString stringWithFormat:@"%@%@", @"twitter://user?screen_name=",formattedTag];
[myTagOrMention addAttribute:NSLinkAttributeName value:twitterAppURL range:range];
} else {
[myTagOrMention addAttribute:NSLinkAttributeName value:[NSString stringWithFormat:@"%@%@", @"http://mobile.twitter.com/",formattedTag] range:range];
}
tweetTextView.attributedText = myTagOrMention;
} else {
// hashtag
// remove whitespaces and pound
NSString *formattedTag = [NSString stringWithFormat:@"%@", [[word stringByReplacingOccurrencesOfString:@" " withString:@""] stringByReplacingOccurrencesOfString:@"#" withString:@""]];
NSString *tweetContets = tweetTextView.text;
NSRange range = [tweetContets rangeOfString:word];
[myTagOrMention addAttribute:NSLinkAttributeName value:[NSString stringWithFormat:@"%@%@%@%@", @"http://twitter.com/search/", @"?q=%23", formattedTag, @"&s=hash"] range:range];
tweetTextView.attributedText = myTagOrMention;
}
}
解决方案
The bug is not in the code you posted. The bug happens when a UITextView is reused while its links are still being generated, which is done asynchronously.
See these similar Stack Overflow questions:
- iOS 7 UITextView link detection crash in UITableView
- UITextViews in a UITableView link detection bug in iOS 7
- UITextView link detection in iOS 7
Many users have reported that setting the text view's text property to nil in the cell's prepareForReuse method resolves the issue. Alternatively you could use a library like TTTAttributedLabel instead of a text view.
The fact that it only appears on an iPhone 5C is probably a red herring. I bet this device is still running iOS 7, and the other devices have been updated to a newer version of iOS.
On a side note, there may be edge cases that your regex doesn't cover. I would delete your twitter parsing method and replace it with the official twitter-text-objc library.
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