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我使用xamarin studio调试uitableview页面，UITableviewCell中有一个UITextview，我会从web服务加载数据并为UITextview设置文本，但是当我多次加载数据时，它会在UITextview的设置文本中崩溃并崩溃日志是这样的：

Incident Identifier: 4144836D-E8DC-434C-8552-FA63A686D6D4
CrashReporter Key:   a35f5169df95f13a4431b55a8b6e41aa6576396e
Hardware Model:      iPad3,1
Process:         MobileLaw [238]
Path:            /var/mobile/Applications/6FDEF7FD-D46D-4F81-9D41-D920C2B98ECF/MobileLaw.app/MobileLaw
Identifier:      MobileLaw
Version:         ??? (???)
Code Type:       ARM (Native)
Parent Process:  launchd [1]

Date/Time:       2013-09-10 09:18:02.395 +0800
OS Version:      iPhone OS 5.1.1 (9B206)
Report Version:  104

Exception Type:  EXC_BAD_ACCESS (SIGABRT)
Exception Codes: KERN_INVALID_ADDRESS at 0x91b6732e
Crashed Thread:  0

Thread 0 name:  Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0   libsystem_kernel.dylib          0x30a5832c __pthread_kill + 8
1   libsystem_c.dylib               0x32fe9208 pthread_kill + 48
2   libsystem_c.dylib               0x32fe2298 abort + 88
3   MobileLaw                       0x013b03fa 0x1000 + 20640762
4   MobileLaw                       0x0136a832 0x1000 + 20355122
5   libsystem_c.dylib               0x32ff37e6 _sigtramp + 42
6   UIKit                           0x30d68b82 -[UITextView webViewDidChange:] + 166
7   Foundation                      0x370074f8 __57-[NSNotificationCenter addObserver:selector:name:object:]_block_invoke_0 + 12
8   CoreFoundation                  0x37dc3540 ___CFXNotificationPost_block_invoke_0 + 64
9   CoreFoundation                  0x37d4f090 _CFXNotificationPost + 1400
10  Foundation                      0x36f7b3e4 -[NSNotificationCenter postNotificationName:object:userInfo:] + 60
11  WebCore                         0x3119b47a WebThreadPostNotification + 62
12  WebKit                          0x3760959e WebEditorClient::respondToChangedContents() + 30
13  WebCore                         0x31365ea6 WebCore::Editor::setTextAsChildOfElement(WTF::String const&, WebCore::Element*) + 738
14  WebKit                          0x37603d00 -[WebFrame(WebPrivate) setText:asChildOfElement:] + 188
15  UIKit                           0x30d693ac -[UITextView setText:] + 300
16  MobileLaw                       0x001cd708 0x1000 + 1885960
17  MobileLaw                       0x00f4f57c 0x1000 + 16049532
18  MobileLaw                       0x00f4c73c 0x1000 + 16037692
19  MobileLaw                       0x00f4bc98 0x1000 + 16034968
20  MobileLaw                       0x008e5094 0x1000 + 9322644
21  MobileLaw                       0x0136c02c 0x1000 + 20361260
22  MobileLaw                       0x013d7858 0x1000 + 20801624
23  MobileLaw                       0x0133954c 0x1000 + 20153676
24  UIKit                           0x30c30ef4 -[UITableView(UITableViewInternal) _createPreparedCellForGlobalRow:withIndexPath:] + 540
25  UIKit                           0x30c2ffd2 -[UITableView(_UITableViewPrivate) _updateVisibleCellsNow:] + 1070
26  UIKit                           0x30c2f75c -[UITableView layoutSubviews] + 200
27  UIKit                           0x30bd3f30 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 176
28  CoreFoundation                  0x37d561f4 -[NSObject performSelector:withObject:] + 36
29  QuartzCore                      0x331eba9e -[CALayer layoutSublayers] + 210
30  QuartzCore                      0x331eb6b6 CA::Layer::layout_if_needed(CA::Transaction*) + 210
31  QuartzCore                      0x331ef83c CA::Context::commit_transaction(CA::Transaction*) + 220
32  QuartzCore                      0x331ef578 CA::Transaction::commit() + 308
33  QuartzCore                      0x331e74b2 CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) + 50
34  CoreFoundation                  0x37dcbb14 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 12
35  CoreFoundation                  0x37dc9d50 __CFRunLoopDoObservers + 252
36  CoreFoundation                  0x37dca0aa __CFRunLoopRun + 754
37  CoreFoundation                  0x37d4d49e CFRunLoopRunSpecific + 294
38  CoreFoundation                  0x37d4d366 CFRunLoopRunInMode + 98
39  GraphicsServices                0x36230432 GSEventRunModal + 130
40  UIKit                           0x30bfecce UIApplicationMain + 1074
41  MobileLaw                       0x001d394c 0x1000 + 1911116
42  MobileLaw                       0x00dbcf54 0x1000 + 14401364
43  MobileLaw                       0x008e5094 0x1000 + 9322644
44  MobileLaw                       0x0136c02c 0x1000 + 20361260
45  MobileLaw                       0x013d7858 0x1000 + 20801624
46  MobileLaw                       0x013da578 0x1000 + 20813176
47  MobileLaw                       0x013ddea4 0x1000 + 20827812
48  MobileLaw                       0x0138272c 0x1000 + 20453164
49  MobileLaw                       0x014291e8 0x1000 + 21135848
50  MobileLaw                       0x0001f888 0x1000 + 125064

Thread 1 name:  Dispatch queue: com.apple.libdispatch-manager
Thread 1:
0   libsystem_kernel.dylib          0x30a483a8 kevent + 24
1   libdispatch.dylib               0x34722f04 _dispatch_mgr_invoke + 708
2   libdispatch.dylib               0x34722c22 _dispatch_mgr_thread + 30

Thread 2:
0   libsystem_kernel.dylib          0x30a48054 semaphore_wait_trap + 8
1   MobileLaw                       0x0137d4d8 0x1000 + 20432088
2   MobileLaw                       0x0141bcf4 0x1000 + 21081332
3   MobileLaw                       0x01406ffe 0x1000 + 20996094
4   MobileLaw                       0x013705e2 0x1000 + 20379106
5   MobileLaw                       0x013b55f0 0x1000 + 20661744
6   libsystem_c.dylib               0x32faa72e _pthread_start + 314
7   libsystem_c.dylib               0x32faa5e8 thread_start + 0

Thread 3 name:  WebThread
Thread 3:
0   libsystem_kernel.dylib          0x30a580d8 __psynch_mutexwait + 24
1   libsystem_c.dylib               0x32f9e674 pthread_mutex_lock + 376
2   WebCore                         0x311324e8 _ZL17_WebTryThreadLockb + 208
3   WebCore                         0x311327ec _ZL14WebRunLoopLockP19__CFRunLoopObservermPv + 24
4   CoreFoundation                  0x37dcbb14 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 12
5   CoreFoundation                  0x37dc9d50 __CFRunLoopDoObservers + 252
6   CoreFoundation                  0x37dca16a __CFRunLoopRun + 946
7   CoreFoundation                  0x37d4d49e CFRunLoopRunSpecific + 294
8   CoreFoundation                  0x37d4d366 CFRunLoopRunInMode + 98
9   WebCore                         0x311d5c9c _ZL12RunWebThreadPv + 396
10  libsystem_c.dylib               0x32faa72e _pthread_start + 314
11  libsystem_c.dylib               0x32faa5e8 thread_start + 0

Thread 4:
0   libsystem_kernel.dylib          0x30a58628 __semwait_signal + 24
1   libsystem_c.dylib               0x32faeb1a nanosleep + 138
2   MobileLaw                       0x0136fb18 0x1000 + 20376344
3   MobileLaw                       0x014007ae 0x1000 + 20969390
4   MobileLaw                       0x01406ffe 0x1000 + 20996094
5   MobileLaw                       0x013705e2 0x1000 + 20379106
6   MobileLaw                       0x013b55f0 0x1000 + 20661744
7   libsystem_c.dylib               0x32faa72e _pthread_start + 314
8   libsystem_c.dylib               0x32faa5e8 thread_start + 0

Thread 5:
0   libsystem_kernel.dylib          0x30a58068 __psynch_cvwait + 24
1   libsystem_c.dylib               0x32faaa46 _pthread_cond_wait + 634
2   libsystem_c.dylib               0x32fb1574 pthread_cond_timedwait + 40
3   MobileLaw                       0x01415a00 0x1000 + 21056000
4   MobileLaw                       0x0136e480 0x1000 + 20370560
5   MobileLaw                       0x01405fde 0x1000 + 20991966
6   MobileLaw                       0x008a8210 0x1000 + 9073168
7   MobileLaw                       0x008a855c 0x1000 + 9074012
8   MobileLaw                       0x008a76dc 0x1000 + 9070300
9   MobileLaw                       0x008a4168 0x1000 + 9056616
10  MobileLaw                       0x008e5094 0x1000 + 9322644
11  MobileLaw                       0x0136c02c 0x1000 + 20361260
12  MobileLaw                       0x013d7858 0x1000 + 20801624
13  MobileLaw                       0x013d795e 0x1000 + 20801886
14  MobileLaw                       0x01407014 0x1000 + 20996116
15  MobileLaw                       0x013705e2 0x1000 + 20379106
16  MobileLaw                       0x013b55f0 0x1000 + 20661744
17  libsystem_c.dylib               0x32faa72e _pthread_start + 314
18  libsystem_c.dylib               0x32faa5e8 thread_start + 0

Thread 6:
0   libsystem_kernel.dylib          0x30a58570 __select + 20
1   libsystem_kernel.dylib          0x30a49d2c select + 44
2   MobileLaw                       0x01379722 0x1000 + 20416290
3   MobileLaw                       0x01401290 0x1000 + 20972176
4   MobileLaw                       0x01406ffe 0x1000 + 20996094
5   MobileLaw                       0x013705e2 0x1000 + 20379106
6   MobileLaw                       0x013b55f0 0x1000 + 20661744
7   libsystem_c.dylib               0x32faa72e _pthread_start + 314
8   libsystem_c.dylib               0x32faa5e8 thread_start + 0

Thread 7:
0   libsystem_kernel.dylib          0x30a4806c semaphore_timedwait_trap + 8
1   MobileLaw                       0x0137d47a 0x1000 + 20431994
2   MobileLaw                       0x01402158 0x1000 + 20975960
3   MobileLaw                       0x01406ffe 0x1000 + 20996094
4   MobileLaw                       0x013705e2 0x1000 + 20379106
5   MobileLaw                       0x013b55f0 0x1000 + 20661744
6   libsystem_c.dylib               0x32faa72e _pthread_start + 314
7   libsystem_c.dylib               0x32faa5e8 thread_start + 0

Thread 8:
0   libsystem_kernel.dylib          0x30a4806c semaphore_timedwait_trap + 8
1   MobileLaw                       0x0137d47a 0x1000 + 20431994
2   MobileLaw                       0x01402158 0x1000 + 20975960
3   MobileLaw                       0x01406ffe 0x1000 + 20996094
4   MobileLaw                       0x013705e2 0x1000 + 20379106
5   MobileLaw                       0x013b55f0 0x1000 + 20661744
6   libsystem_c.dylib               0x32faa72e _pthread_start + 314
7   libsystem_c.dylib               0x32faa5e8 thread_start + 0

Thread 9:
0   libsystem_kernel.dylib          0x30a4806c semaphore_timedwait_trap + 8
1   MobileLaw                       0x0137d47a 0x1000 + 20431994
2   MobileLaw                       0x01402158 0x1000 + 20975960
3   MobileLaw                       0x01406ffe 0x1000 + 20996094
4   MobileLaw                       0x013705e2 0x1000 + 20379106
5   MobileLaw                       0x013b55f0 0x1000 + 20661744
6   libsystem_c.dylib               0x32faa72e _pthread_start + 314
7   libsystem_c.dylib               0x32faa5e8 thread_start + 0

Thread 10 name:  com.apple.NSURLConnectionLoader
Thread 10:
0   libsystem_kernel.dylib          0x30a48004 mach_msg_trap + 20
1   libsystem_kernel.dylib          0x30a481fa mach_msg + 50
2   CoreFoundation                  0x37dcb3ec __CFRunLoopServiceMachPort + 120
3   CoreFoundation                  0x37dca124 __CFRunLoopRun + 876
4   CoreFoundation                  0x37d4d49e CFRunLoopRunSpecific + 294
5   CoreFoundation                  0x37d4d366 CFRunLoopRunInMode + 98
6   Foundation                      0x36f88bb2 +[NSURLConnection(Loader) _resourceLoadLoop:] + 302
7   Foundation                      0x36f88a7a -[NSThread main] + 66
8   Foundation                      0x3701c58a __NSThread__main__ + 1042
9   libsystem_c.dylib               0x32faa72e _pthread_start + 314
10  libsystem_c.dylib               0x32faa5e8 thread_start + 0

Thread 11 name:  WebCore: CFNetwork Loader
Thread 11:
0   libsystem_kernel.dylib          0x30a48004 mach_msg_trap + 20
1   libsystem_kernel.dylib          0x30a481fa mach_msg + 50
2   CoreFoundation                  0x37dcb3ec __CFRunLoopServiceMachPort + 120
3   CoreFoundation                  0x37dca124 __CFRunLoopRun + 876
4   CoreFoundation                  0x37d4d49e CFRunLoopRunSpecific + 294
5   CoreFoundation                  0x37d4d366 CFRunLoopRunInMode + 98
6   WebCore                         0x311ff0d2 _ZN7WebCoreL15runLoaderThreadEPv + 122
7   libsystem_c.dylib               0x32faa72e _pthread_start + 314
8   libsystem_c.dylib               0x32faa5e8 thread_start + 0

Thread 12:
0   libsystem_kernel.dylib          0x30a58cd4 __workq_kernreturn + 8
1   libsystem_c.dylib               0x32fa4f36 _pthread_wqthread + 610
2   libsystem_c.dylib               0x32fa4cc8 start_wqthread + 0

Thread 13:
0   libsystem_kernel.dylib          0x30a58cd4 __workq_kernreturn + 8
1   libsystem_c.dylib               0x32fa4f36 _pthread_wqthread + 610
2   libsystem_c.dylib               0x32fa4cc8 start_wqthread + 0

Thread 14:
0   libsystem_kernel.dylib          0x30a58cd4 __workq_kernreturn + 8
1   libsystem_c.dylib               0x32fa4f36 _pthread_wqthread + 610
2   libsystem_c.dylib               0x32fa4cc8 start_wqthread + 0

Thread 0 crashed with ARM Thread State:
    r0: 0x00000000    r1: 0x00000000      r2: 0x00000001      r3: 0x00000000
    r4: 0x00000006    r5: 0x3e924d98      r6: 0x01455f20      r7: 0x2fdfc644
    r8: 0x00000000    r9: 0x00000000     r10: 0x01455f46     r11: 0x0357f6c0
    ip: 0x00000148    sp: 0x2fdfc638      lr: 0x32fe920f      pc: 0x30a5832c
  cpsr: 0x00000010

Binary Images:
    0x1000 -  0x14d0fff +MobileLaw armv7  <a8f2805092f63491948848f582058ecf> /var/mobile/Applications/6FDEF7FD-D46D-4F81-9D41-D920C2B98ECF/MobileLaw.app/MobileLaw
 0x2dd5000 -  0x2dd5fff +MobileSubstrate.dylib armv6  <a059eb894e623ec09d63294c525ff7a2> /Library/MobileSubstrate/MobileSubstrate.dylib
 0x2f11000 -  0x2f12fff +SubstrateLoader.dylib armv6  <eec9b813adfd3bdf86702ae8bbf0f404> /Library/Frameworks/CydiaSubstrate.framework/Libraries/SubstrateLoader.dylib
0x2fe15000 - 0x2fe36fff  dyld armv7  <77eddfd654df393ba9c95ff01715fd08> /usr/lib/dyld
4

4 回答 4

1

在C#，@Dharmbir 答案转换为

InvokeOnMainThread (()=> {
    textView.Text = "your text";
});
于 2013-09-10T10:56:24.747 回答
0

这是我的代码：按钮 setTitle 不会崩溃，它会在 setText 上崩溃。另一个问题是当我调试程序时，它会在第二次加载数据时崩溃。当我在没有调试的情况下运行程序时，它会崩溃第二次加载数据很少，多次加载数据后会崩溃

string values = ValueList[curCellNumber] == null ? "" : ValueList[curCellNumber].ToString();
UITableViewCell cell = tableView.DequeueReusableCell(cellIdentity);
UITextView textView = cell.ViewWithTag(10001) as UITextView;
UIButton btnSelects=cell.ViewWithTag(10002) as UIButton;
if(btnSelects != null){
    btnSelects.SetTitle(curCellNumber,UIControlState.Normal);
}
this.InvokeOnMainThread(() => {
    if (textView != null) {
        textView.Text = values;
        textView.Delegate = new TextViewDelegate(DataTableName, FieldList[curCellNumber], TID);
    }
});
于 2013-09-11T10:21:32.460 回答
0

无论您在 UI 上进行什么更改，都必须在 UI 线程中完成。换句话说，如果你在其他线程中执行一些代码，并且想要对 UI 进行更改，你应该把它放到 

this.InvokeOnMainThread(() => { });

此外，textView 的范围是有问题的。在这种情况下，Monotouch 垃圾收集器有点奇怪，在某些情况下它会在你预料之外收集它。将其声明为全局或类属性（或自定义表格单元格的属性）。在您的代码中，有一个匆忙：主线程会在 GetCell（或声明 textView 的任何方法）结束并且 GC 收集 textView 之前访问 textView 吗？

于 2013-09-12T08:53:48.633 回答
0

我认为您正在后台线程中执行此操作。所以根据苹果的说法这是完全错误的，因为苹果不允许在后台线程中触摸 UIKit。所以你需要像这样设置文本

[self performSelectorOnMainThread:@selector(setTextOnTextView) withObject:nil waitUntilDone:NO];

- (void)setTextOnTextView
{
// ---------- set your text here -------

}
于 2013-09-10T10:17:13.700 回答