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一般来说，我对 iPhone 开发和 XCode 比较陌生，不知道如何开始对 CoreTelephony 问题进行故障排除。我来自 Java 背景，所以内存管理和指针对我来说有点生疏，而且更复杂的是，我上次查看 iPhone 项目时，Objective-C 要求您在卸载时释放对象，这似乎已经改变了？

我正在尝试在概念验证应用程序中使用库：CoreTelephony.h、CoreTelephony.m 来获取手机的 imei 号码。

代码片段：

// 为 Web 视图请求 Web 应用程序 url 的代码 [appView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:fullURL]]];

// Code to call apple's private core telephony framework
NSString *imei;
_CTServerConnectionCopyMobileIdentity(result, sc, &imei);

代码在以下位置引发 Thread 1:EXC_BAD_ACCESS (code=13, address=0x0) 错误：_CTServerConnectionCopyMobileIdentity(result, sc, &imei);

任何帮助将不胜感激。

CoreTelephony.h 代码：

//
struct CTServerConnection
{
    int a;
    int b;
    CFMachPortRef myport;
    int c;
    int d;
    int e;
    int f;
    int g;
    int h;
    int i;  
};
struct CTResult
{
    int flag;
    int a;
};

struct CTServerConnection * _CTServerConnectionCreate(CFAllocatorRef, void *, int *);


void _CTServerConnectionCopyMobileIdentity(struct CTResult *, struct CTServerConnection *, NSString **);

堆栈转储：

OS Version:      iOS 6.0 (10A403)
Report Version:  104

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x00000000
Crashed Thread:  0

Thread 0 name:  Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0   CoreTelephony                   0x35c4ff46 0x35c14000 + 245574
1   CoreTelephony                   0x35c5012a 0x35c14000 + 246058
2   AttendanceMonitor               0x00026c9e 0x24000 + 11422
3   UIKit                           0x36282590 0x36260000 + 140688
4   UIKit                           0x362c2d74 0x36260000 + 404852
5   UIKit                           0x362beae8 0x36260000 + 387816
6   UIKit                           0x363001cc 0x36260000 + 655820
7   AttendanceMonitor               0x000265e0 0x24000 + 9696
8   UIKit                           0x362c3ad4 0x36260000 + 408276
9   UIKit                           0x362c365e 0x36260000 + 407134
10  UIKit                           0x362bb846 0x36260000 + 374854
11  UIKit                           0x36263c3c 0x36260000 + 15420
12  UIKit                           0x362636d0 0x36260000 + 14032
13  UIKit                           0x3626311e 0x36260000 + 12574
14  GraphicsServices                0x343db5a0 0x343d5000 + 26016
15  GraphicsServices                0x343db1ce 0x343d5000 + 25038
16  CoreFoundation                  0x33700170 0x33669000 + 618864
17  CoreFoundation                  0x33700112 0x33669000 + 618770
18  CoreFoundation                  0x336fef94 0x33669000 + 614292
19  CoreFoundation                  0x33671eb8 0x33669000 + 36536
20  CoreFoundation                  0x33671d44 0x33669000 + 36164
21  UIKit                           0x362ba480 0x36260000 + 369792
22  UIKit                           0x362b72fc 0x36260000 + 357116
23  AttendanceMonitor               0x00025ba4 0x24000 + 7076
24  libdyld.dylib                   0x382f6b1c 0x382f5000 + 6940

Thread 1:
0   libsystem_kernel.dylib          0x323fad98 0x323e9000 + 73112
1   libsystem_c.dylib               0x377accf6 0x377a6000 + 27894
2   libsystem_c.dylib               0x377aca12 0x377a6000 + 27154
3   libsystem_c.dylib               0x377ac8a0 0x377a6000 + 26784

Thread 2 name:  Dispatch queue: com.apple.libdispatch-manager
Thread 2:
0   libsystem_kernel.dylib          0x323ea648 0x323e9000 + 5704
1   libdispatch.dylib               0x37b134ec 0x37b02000 + 70892
2   libdispatch.dylib               0x37b05df4 0x37b02000 + 15860
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