有一个用户报告说他在点击电子邮件按钮后我的应用程序立即崩溃了。但是我无法在具有相同规格的设备上重现这个问题。
附上崩溃日志。在reportVC.m中，我调用[self presentModalViewController:controller animated:YES];。控制器是MFMailComposeViewController的一个实例。
Incident Identifier: 4A06DE9B-178C-43C2-AE23-D8C7EEED7831
CrashReporter Key: 8b802dcda2f9dfd70003b0bedceac04ef79730f0
Hardware Model: iPad3,6
Process: ATracker [5610]
Path: /var/mobile/Applications/ACABBAE7-C701-48AD-9DAC-9B4C0ABD3CFF/ATracker.app/ATracker
Identifier: ATracker
Version: ??? (???)
Code Type: ARM (Native)
Parent Process: launchd [1]
Date/Time: 2013-07-15 18:42:30.776 +0100
OS Version: iOS 6.1.3 (10B329)
Report Version: 104
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Crashed Thread: 0
Last Exception Backtrace:
0 CoreFoundation 0x3286c3e2 __exceptionPreprocess + 158
1 libobjc.A.dylib 0x3a70695e objc_exception_throw + 26
2 UIKit 0x34767118 -[UIViewController presentViewController:withTransition:completion:] + 3764
3 UIKit 0x34888d9e -[UIViewController presentModalViewController:animated:] + 26
4 ATracker 0x0007fac2 -[ReportVC sendEmail:] (ReportVC.m:1936)
5 UIKit 0x34766082 -[UIApplication sendAction:to:from:forEvent:] + 66
6 UIKit 0x34766036 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 26
7 UIKit 0x34766010 -[UIControl sendAction:to:forEvent:] + 40
8 UIKit 0x347658c6 -[UIControl(Internal) _sendActionsForEvents:withEvent:] + 498
9 UIKit 0x34765db4 -[UIControl touchesEnded:withEvent:] + 484
10 UIKit 0x3468e5f4 -[UIWindow _sendTouchesForEvent:] + 520
11 UIKit 0x3467b8dc -[UIApplication sendEvent:] + 376
12 UIKit 0x3467b1ea _UIApplicationHandleEvent + 6194
13 GraphicsServices 0x3636f5f2 _PurpleEventCallback + 586
14 GraphicsServices 0x3636f222 PurpleEventCallback + 30
15 CoreFoundation 0x328413e2 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 30
16 CoreFoundation 0x32841386 __CFRunLoopDoSource1 + 134
17 CoreFoundation 0x3284020a __CFRunLoopRun + 1378
18 CoreFoundation 0x327b3238 CFRunLoopRunSpecific + 352
19 CoreFoundation 0x327b30c4 CFRunLoopRunInMode + 100
20 GraphicsServices 0x3636e336 GSEventRunModal + 70
21 UIKit 0x346cf2b4 UIApplicationMain + 1116
22 ATracker 0x00044fe6 main (main.m:16)
23 ATracker 0x00044f9c start + 36
非常感谢您的想法和提示！