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xcode swift項目與像MQTTClient這樣的幾個cocoapods框架一起運行，使用keychain和keychain返回null，在xcode上運行良好，但在分發adhoc時崩潰，安裝cocoapods，添加可可的.a文件來構建階段，添加庫搜索路徑，我不知道爲什麼鑰匙串保持返回零和爲什麼它不斷崩潰的分佈adhoc，這裏是崩潰報告使用CocoaPods分發AdHoc崩潰的應用程序（使用鑰匙串和鑰匙串返回null）
類MQTTManager啓動功能訪問Cocopods MQTTClient.a 並訪問鑰匙鏈
Incident Identifier: 4B4B005E-7BC2-487D-9A8A-FEEAB4967CF4
CrashReporter Key: TODO
Hardware Model: iPhone7,2
Process: testProj [494]
Path: /private/var/mobile/Containers/Bundle/Application /3A3B094D-FACB-49B9-BE84-5EA6F8F40D2A/testProj.app/testProj
Identifier: com.test.testProj
Version: 205
Code Type: ARM-64
Parent Process: launchd [1]
Date/Time: 2015-03-13 14:28:20 +0000
OS Version: iPhone OS 8.2 (12D508)
Report Version: 104
Exception Type: SIGTRAP
Exception Codes: #0 at 0x1002559e4
Crashed Thread: 0
Thread 0 Crashed:
0 testProj 0x00000001002559e4 _TFC9testProj11MQTTManager5startfS0_FT_T_ + 2000
1 testProj 0x000000010014a134 _TFFC9testProj16SignInController9checkUserFS0_FT_T_U_FTCSo12NSURLRequestGSqCSo17NSHTTPURLResponse_GSqPSs9AnyObject__GSqCSo7NSError__T_ + 3848
2 testProj 0x0000000100244b68 _TFFFC9testProj7Request8responseFDS0_FT5queueGSqCSo8NSObject_10serializerFTCSo12NSURLRequestGSqCSo17NSHTTPURLResponse_GSqCSo6NSData__TGSqPSs9AnyObject__GSqCSo7NSError__17completionHandlerFTS2_GSqS3__GSqPS5___GSqS6___T__DS0_U_FT_T_U_FT_T_ + 640
3 libdispatch.dylib 0x0000000198631994 <redacted> + 24
4 libdispatch.dylib 0x0000000198631954 <redacted> + 16
5 libdispatch.dylib 0x000000019863620c _dispatch_main_queue_callback_4CF + 1608
6 CoreFoundation 0x0000000186fc22ec <redacted> + 12
7 CoreFoundation 0x0000000186fc0394 <redacted> + 1492
8 CoreFoundation 0x0000000186eed1f4 CFRunLoopRunSpecific + 396
9 GraphicsServices 0x000000019030f6fc GSEventRunModal + 168
10 UIKit 0x000000018b87e10c UIApplicationMain + 1488
11 testProj 0x00000001001c0c60 main + 116
12 libdyld.dylib 0x000000019865ea08 <redacted> + 4