一 基礎(chǔ)Crash分析
（1）當(dāng)APP發(fā)生閃退瓢谢，手機(jī)內(nèi)部會(huì)生成一個(gè).Crash 或者.ips 文件，里面會(huì)包含崩潰時(shí)的信息藏雏，例如下
Last Exception Backtrace:
(0x18534a364 0x184590528 0x1852e2e9c 0x185217d0c 0x101134e1c 0x100fe8a24 0x184cc6a54 0x184cc6a14 0x184cd3698 0x1852f2544 0x1852f0120 0x18520fe58 0x1870bcf84 0x18e88f67c 0x1010b2650 0x184d2c56c)
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0 libsystem_kernel.dylib 0x0000000184e5c2e8 0x184e3a000 + 140008
1 libsystem_pthread.dylib 0x0000000184f712f8 0x184f6e000 + 13048
2 libsystem_c.dylib 0x0000000184dcafbc 0x184d68000 + 405436
3 libc++abi.dylib 0x0000000184568068 0x184566000 + 8296
4 libc++abi.dylib 0x0000000184580568 0x184566000 + 107880
5 libc++abi.dylib 0x000000018457fea8 0x184566000 + 106152
6 libobjc.A.dylib 0x000000018459065c 0x184588000 + 34396
7 CoreFoundation 0x00000001852e2e9c 0x185204000 + 913052
8 CoreFoundation 0x0000000185217d0c 0x185204000 + 81164
9 trend 0x0000000101134e1c 0x100e34000 + 3149340
10 trend 0x0000000100fe8a24 0x100e34000 + 1788452
11 libdispatch.dylib 0x0000000184cc6a54 0x184cc5000 + 6740
12 libdispatch.dylib 0x0000000184cc6a14 0x184cc5000 + 6676
13 libdispatch.dylib 0x0000000184cd3698 0x184cc5000 + 59032
14 CoreFoundation 0x00000001852f2544 0x185204000 + 976196
15 CoreFoundation 0x00000001852f0120 0x185204000 + 966944
16 CoreFoundation 0x000000018520fe58 0x185204000 + 48728
17 GraphicsServices 0x00000001870bcf84 0x1870b2000 + 44932
18 UIKit 0x000000018e88f67c 0x18e81c000 + 472700
19 trend 0x00000001010b2650 0x100e34000 + 2614864
20 libdyld.dylib 0x0000000184d2c56c 0x184d2b000 + 5484
上面的信息我們看不懂数初，需要將其符號(hào)化找爱。
（2）崩潰日志符號(hào)化
第一步：在我們上傳APPStore 并且審核通過(guò)后，我們需要將.IPA文件泡孩、.xcarchive 都保存起來(lái)车摄，方便線上崩潰日志分析。
第二步：右鍵 .xcarchive ，顯示包內(nèi)容吮播。如下圖
1.png
第三步：桌面新建一個(gè)文件夾Crash,將上圖中的 trend.app.dSYM 文件復(fù)制到Crash文件夾中变屁，同時(shí)將崩潰日志 trend-2018-01-04-211936.crash也復(fù)制到文件夾中
第四步：將symbolicatecrash工具copy到Crash文件夾，這個(gè)文件到 這個(gè)路徑找
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/PrivateFrameworks/DTDeviceKit.framework/Versions/A/Resources
第五步 終于可以符號(hào)化了薄料，具體如下敞贡，根據(jù)你的路徑修改一下就OK了
zxs:~ yixue$ cd /Users/yixuePXh/Desktop/crash
zxs:crash yixue$ ./symbolicatecrash /Users/yixuePXh/Desktop/crash/trend-2018-01-04-211936.crash /Users/yixuePXh/Desktop/crash/trend.app.dSYM > log.crash
Error: "DEVELOPER_DIR" is not defined at ./symbolicatecrash line 69.
zxs:crash yixue$ export DEVELOPER_DIR="/Applications/XCode.app/Contents/Developer"
zxs:crash yixue$ ./symbolicatecrash /Users/yixuePXh/Desktop/crash/trend-2018-01-04-211936.crash /Users/yixuePXh/Desktop/crash/trend.app.dSYM > log.crash
這個(gè)時(shí)候看log.crash文件
last Exception Backtrace:
0 CoreFoundation 0x18534a364 __exceptionPreprocess + 124
1 libobjc.A.dylib 0x184590528 objc_exception_throw + 56
2 CoreFoundation 0x1852e2e9c _CFThrowFormattedException + 112
3 CoreFoundation 0x185217d0c -[__NSDictionaryM setObject:forKey:] + 932
4 trend 0x101134e1c -[YXAPIClient actionLogWithParameter:detailedID:M6_stock_id:] (YXAPIClient.m:1075)
5 trend 0x100fe8a24 __59-[YXProductH5ViewController yxfindDayTypeKline:index:type:]_block_invoke (YXProductH5ViewController.m:372)
6 libdispatch.dylib 0x184cc6a54 _dispatch_call_block_and_release + 24
7 libdispatch.dylib 0x184cc6a14 _dispatch_client_callout + 16
8 libdispatch.dylib 0x184cd3698 _dispatch_main_queue_callback_4CF$VARIANT$mp + 1016
9 CoreFoundation 0x1852f2544 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12
10 CoreFoundation 0x1852f0120 __CFRunLoopRun + 2012
11 CoreFoundation 0x18520fe58 CFRunLoopRunSpecific + 436
12 GraphicsServices 0x1870bcf84 GSEventRunModal + 100
13 UIKit 0x18e88f67c UIApplicationMain + 236
14 trend 0x1010b2650 main (main.m:14)
15 libdyld.dylib 0x184d2c56c start + 4
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0 libsystem_kernel.dylib 0x0000000184e5c2e8 __pthread_kill + 8
1 libsystem_pthread.dylib 0x0000000184f712f8 pthread_kill$VARIANT$mp + 396
2 libsystem_c.dylib 0x0000000184dcafbc abort + 140
3 libc++abi.dylib 0x0000000184568068 __cxa_bad_cast + 0
4 libc++abi.dylib 0x0000000184580568 std::__terminate(void (*)()) + 44
5 libc++abi.dylib 0x000000018457fea8 __cxxabiv1::exception_cleanup_func(_Unwind_Reason_Code, _Unwind_Exception*) + 0
6 libobjc.A.dylib 0x000000018459065c _objc_exception_destructor(void*) + 0
7 CoreFoundation 0x00000001852e2e9c _CFArgv + 0
8 CoreFoundation 0x0000000185217d0c -[__NSDictionaryM setObject:forKey:] + 932
9 trend 0x0000000101134e1c -[YXAPIClient actionLogWithParameter:detailedID:M6_stock_id:] (YXAPIClient.m:1076)
10 trend 0x0000000100fe8a24 __59-[YXProductH5ViewController yxfindDayTypeKline:index:type:]_block_invoke (YXProductH5ViewController.m:372)
11 libdispatch.dylib 0x0000000184cc6a54 _dispatch_call_block_and_release + 24
12 libdispatch.dylib 0x0000000184cc6a14 _dispatch_client_callout + 16
13 libdispatch.dylib 0x0000000184cd3698 _dispatch_main_queue_callback_4CF$VARIANT$mp + 1016
這個(gè)文件我們都看的懂泵琳，發(fā)現(xiàn)崩潰到 -[__NSDictionaryM setObject:forKey:]這個(gè)地方摄职。
二 appstore 崩潰日志分析
第一步：打開(kāi)XCode ，點(diǎn)擊 window ->Organizer 如下圖
65A31FA3-E808-4946-9E34-18DF93C805E6.png
第二步获列，點(diǎn)擊任意一個(gè)崩潰谷市，例如第三行 UIKit:-(UIView(interbal) _addSubView..........
第三步，點(diǎn)擊圖右邊 Open in Project击孩，然后選擇當(dāng)時(shí)上傳APPStore的那個(gè)tag分支（不會(huì)變）中的.xcodeproj 或者 . xcworkspace迫悠，定位到崩潰處的代碼。
1C34712A-84A3-474B-901A-0F908D4FA176.png
