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iOS 6 EXC_BAD_ACCESS in SampleFTPSample代碼

2012-09-25 86 views
3

我運行從iOS開發人員中心下載的SampleFTPSample源代碼（iOS6.0 SDK，Xcode4.5）。 SampleFTPSampleiOS 6 EXC_BAD_ACCESS in SampleFTPSample代碼

的圖片，當我取回從FTPServer的列表，有時會得到EXC_BAD_ACCESS錯誤。我沒有修改代碼，我不知道爲什麼，我該如何修復它？

非常感謝。

EXC_BAD_ACCESS Fig.1 EXC_BAD_ACCESS Fig.2 EXC_BAD_ACCESS Fig.3

來源

2012-09-25 peterlawn

+0

得到這個問題的任何解決方案？ – Dhaval

回答

1

附加崩潰日誌

Date/Time:  2012-09-27 14:15:16.911 +0800 
OS Version:  iOS 6.0 (10A403) 
Report Version: 104 

Exception Type: EXC_BAD_ACCESS (SIGSEGV) 
Exception Codes: KERN_INVALID_ADDRESS at 0x00000030 
Crashed Thread: 0 

Thread 0 name: Dispatch queue: com.apple.main-thread 
Thread 0 Crashed: 
0 CFNetwork      0x3614ad44 <redacted> + 64 
1 CFNetwork      0x3614aeaa <redacted> + 222 
2 CFNetwork      0x3614a84c <redacted> + 108 
3 CFNetwork      0x36171cb2 <redacted> + 26 
4 CFNetwork      0x36122000 <redacted> + 316 
5 CFNetwork      0x361482ee <redacted> + 3414 
6 CFNetwork      0x361b7e26 <redacted> + 38 
7 CFNetwork      0x361b7f16 <redacted> + 6 
8 CFNetwork      0x361b91b2 <redacted> + 42 
9 CFNetwork      0x361b7920 <redacted> + 36 
10 CoreFoundation     0x32e6d3f4 <redacted> + 72 
11 CoreFoundation     0x32e882f6 CFReadStreamOpen + 86 
12 FTPSample      0x0009c324 0x96000 + 25380 
13 FTPSample      0x0009cdee 0x96000 + 28142 
14 UIKit       0x35b3d0a8 -[UIApplication sendAction:to:from:forEvent:] + 68 
15 UIKit       0x35b3d130 -[UIBarButtonItem(UIInternal) _sendAction:withEvent:] + 116 
16 UIKit       0x35b3d0a8 -[UIApplication sendAction:to:from:forEvent:] + 68 
17 UIKit       0x35b3d05a -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 26 
18 UIKit       0x35b3d038 -[UIControl sendAction:to:forEvent:] + 40 
19 UIKit       0x35b3c8ee -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 498 
20 UIKit       0x35b3cde4 -[UIControl touchesEnded:withEvent:] + 484 
21 UIKit       0x35a655f4 -[UIWindow _sendTouchesForEvent:] + 520 
22 UIKit       0x35a52804 -[UIApplication sendEvent:] + 376 
23 UIKit       0x35a5211e _UIApplicationHandleEvent + 6150 
24 GraphicsServices    0x33bca5a0 _PurpleEventCallback + 588 
25 GraphicsServices    0x33bca1ce PurpleEventCallback + 30 
26 CoreFoundation     0x32eef170 <redacted> + 32 
27 CoreFoundation     0x32eef112 <redacted> + 134 
28 CoreFoundation     0x32eedf94 <redacted> + 1380 
29 CoreFoundation     0x32e60eb8 CFRunLoopRunSpecific + 352 
30 CoreFoundation     0x32e60d44 CFRunLoopRunInMode + 100 
31 GraphicsServices    0x33bc92e6 GSEventRunModal + 70 
32 UIKit       0x35aa62fc UIApplicationMain + 1116 
33 FTPSample      0x00097bc8 0x96000 + 7112 
34 FTPSample      0x00097364 0x96000 + 4964 

Thread 1: 
0 libsystem_kernel.dylib   0x31be9d98 __workq_kernreturn + 8 
1 libsystem_c.dylib    0x36f9bcf6 <redacted> + 14 
2 libsystem_c.dylib    0x36f9ba12 <redacted> + 362 
3 libsystem_c.dylib    0x36f9b8a0 start_wqthread + 4 

Thread 2 name: Dispatch queue: com.apple.libdispatch-manager 
Thread 2: 
0 libsystem_kernel.dylib   0x31bd9648 kevent64 + 24 
1 libdispatch.dylib    0x373024ec _dispatch_mgr_invoke + 792 
2 libdispatch.dylib    0x372f4df4 _dispatch_mgr_thread$VARIANT$up + 32 

Thread 3: 
0 libsystem_kernel.dylib   0x31be9d98 __workq_kernreturn + 8 
1 libsystem_c.dylib    0x36f9bcf6 <redacted> + 14 
2 libsystem_c.dylib    0x36f9ba12 <redacted> + 362 
3 libsystem_c.dylib    0x36f9b8a0 start_wqthread + 4 

Thread 4 name: WebThread 
Thread 4: 
0 libsystem_kernel.dylib   0x31bd8eb4 mach_msg_trap + 20 
1 libsystem_kernel.dylib   0x31bd9048 mach_msg + 36 
2 CoreFoundation     0x32eef040 <redacted> + 124 
3 CoreFoundation     0x32eedd9e <redacted> + 878 
4 CoreFoundation     0x32e60eb8 CFRunLoopRunSpecific + 352 
5 CoreFoundation     0x32e60d44 CFRunLoopRunInMode + 100 
6 WebCore       0x33c44a70 <redacted> + 440 
7 libsystem_c.dylib    0x36fa630e <redacted> + 306 
8 libsystem_c.dylib    0x36fa61d4 thread_start + 4 

Thread 5: 
0 libsystem_kernel.dylib   0x31be9d98 __workq_kernreturn + 8 
1 libsystem_c.dylib    0x36f9bcf6 <redacted> + 14 
2 libsystem_c.dylib    0x36f9ba12 <redacted> + 362 
3 libsystem_c.dylib    0x36f9b8a0 start_wqthread + 4 

Thread 6 name: com.apple.CFSocket.private 
Thread 6: 
0 libsystem_kernel.dylib   0x31be9594 __select + 20 
1 CoreFoundation     0x32ef31f2 <redacted> + 674 
2 libsystem_c.dylib    0x36fa630e <redacted> + 306 
3 libsystem_c.dylib    0x36fa61d4 thread_start + 4 

Thread 7: 
0 libsystem_kernel.dylib   0x31be9d98 __workq_kernreturn + 8 
1 libsystem_c.dylib    0x36f9bcf6 <redacted> + 14 
2 libsystem_c.dylib    0x36f9ba12 <redacted> + 362 
3 libsystem_c.dylib    0x36f9b8a0 start_wqthread + 4 

Thread 0 crashed with ARM Thread State (32-bit): 
r0: 0x00000007 r1: 0x1cddeef8  r2: 0x1cddeef8  r3: 0x00000004 
r4: 0x00000000 r5: 0x1cdc8c90  r6: 0x00000007  r7: 0x2fd69554 
r8: 0x0000000d r9: 0x000bc4b0  r10: 0x1cddbf70  r11: 0x1cddeef0 
ip: 0x3abff970 sp: 0x2fd69524  lr: 0x3614ad3f  pc: 0x3614ad44 
cpsr: 0x60000030

來源

2012-10-03 10:40:09

1

yeahh！我終於找到了解決辦法。主線程完成後，我調用了uialertview show。所以它現在不會崩潰。這是我的情況。所以沒有一個確切的答案，但你也可以應用這個 peterlawn。也許這對你也是有用的。 ！

來源

2012-10-09 07:04:34

+0

有沒有更好的方法來解決這個問題，因爲我需要在用戶使用應用程序時在後臺執行FTP連接，並且無法在主線程中顯示警報。 – o15a3d4l11s2

+0

是的，爲此不需要任何警報。這就是爲什麼我在這個答案中告訴我這是我的例子。對於你來說，你可以在你的後臺線程不同的線程中執行你的應用程序崩潰的動作，並且在任務完成後立即關閉新線程 –

8

通過在創建流（使用CFReadStreamCreateWithFTPURL）後立即將kCFStreamPropertyFTPAttemptPersistentConnection屬性設置爲false來完成此操作。下面是可能的樣子：

success = [self.networkStream setProperty:(__bridge id) kCFBooleanFalse 
    forKey:(__bridge NSString *) kCFStreamPropertyFTPAttemptPersistentConnection 
]; 
assert(success);

來源

2012-10-16 02:28:55

+0

你可以把整個代碼放入回收列表中，讓我有想法嗎？ – Dhaval

+0

你能解釋一下這是什麼以及爲什麼它是必要的？這是新的ios6 – brianestey

+0

它適用於我的情況..謝謝！ –

0 
- (void)_startReceive:(NSString*) urlPath 
{ 
BOOL    success; 
NSURL *    url; 
CFReadStreamRef  ftpStream; 

assert(self.networkStream == nil);  // don't tap receive twice in a row! 

// First get and check the URL. 

if(urlPath != nil) 
{ 
    ...url = FTP_URL here... 
} 
success = (url != nil); 
// If the URL is bogus, let the user know. Otherwise kick off the connection. 
if (! success) 
{ 
    [self _updateStatus:@"Invalid URL"]; 
} 
else 
{ 

    // Create the mutable data into which we will receive the listing. 

    self.listData = [NSMutableData data]; 
    assert(self.listData != nil); 

    // Open a CFFTPStream for the URL. 

    ftpStream = CFReadStreamCreateWithFTPURL(NULL, (__bridge CFURLRef) url); 
    assert(ftpStream != NULL); 

    self.networkStream = (__bridge NSInputStream *) ftpStream; 



    success = [self.networkStream setProperty:(__bridge id) kCFBooleanFalse 
    forKey:(__bridge NSString *) kCFStreamPropertyFTPAttemptPersistentConnection 
       ]; 
    assert(success); 


    self.networkStream.delegate = self; 
    [self.networkStream scheduleInRunLoop:[NSRunLoop currentRunLoop]forMode:NSDefaultRunLoopMode]; 
    [self.networkStream open]; 

    // Have to release ftpStream to balance out the create. self.networkStream 
    // has retained this for our persistent use. 

    CFRelease(ftpStream); 

    // Tell the UI we're receiving. 

    [self _receiveDidStart]; 
}

}

來源

2012-11-07 11:17:22

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