基本操做:html
一、電腦安裝好Xcode,鏈接好手機設備ios
二、打開Xcode,點擊Window-Devices and Simulatorsswift
三、選中手機設備,點擊View Device Logs,便可查看手機crash日誌app
Incident Identifier: F04CE61A-F2E4-4AC8-8293-5AE959DE1842 CrashReporter Key: 29d37eab6d7de1b3f24295a26734d0c45dacdb9c Hardware Model: iPhone9,1 Process: MyCamera [1899] Path: /private/var/containers/Bundle/Application/33958860-F333-4713-853A-E4E359FC4DA2/MyCamera.app/MyCamera Identifier: com.ios.devetest Version: 1 (1.0) Code Type: ARM-64 (Native) Role: Foreground Parent Process: launchd [1] Coalition: com.ios.devetest [1803] Date/Time: 2019-03-30 15:26:19.5775 +0800 Launch Time: 2019-03-30 15:26:11.1932 +0800 OS Version: iPhone OS 11.3.1 (15E302) Baseband Version: 3.66.00 Report Version: 104 Exception Type: EXC_BREAKPOINT (SIGTRAP) Exception Codes: 0x0000000000000001, 0x0000000104198b8c Termination Signal: Trace/BPT trap: 5 Termination Reason: Namespace SIGNAL, Code 0x5 Terminating Process: exc handler [0] Triggered by Thread: 0 Filtered syslog: None found Thread 0 name: Dispatch queue: com.apple.main-thread Thread 0 Crashed: 0 libswiftCore.dylib 0x0000000104198b8c 0x103fa8000 + 2034572 1 libswiftCore.dylib 0x0000000104198b8c 0x103fa8000 + 2034572 2 libswiftCore.dylib 0x0000000104001fc0 0x103fa8000 + 368576 3 MyCamera 0x00000001031113d4 0x102eb8000 + 2462676
接下來長長姿式。。。。ide
首先要知道一點,之因此在View Device Logs面板能夠看到crash日誌,主要的功臣就是一個叫symbolicatecrash的可執行文件。集成在Xcode中的symbolicatecrash有點相似於集成在Android Studio中的adb工具包同樣,而且二者都是能夠單獨拿出來使用的。函數
首先,找到symbolicatecrash文件的位置:find /Applications/Xcode.app -name symbolicatecrash -type f工具
/Applications/Xcode.app/Contents/Developer/Platforms/WatchSimulator.platform/Developer/Library/PrivateFrameworks/DVTFoundation.framework/symbolicatecrash /Applications/Xcode.app/Contents/Developer/Platforms/AppleTVSimulator.platform/Developer/Library/PrivateFrameworks/DVTFoundation.framework/symbolicatecrash /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Library/PrivateFrameworks/DVTFoundation.framework/symbolicatecrash /Applications/Xcode.app/Contents/SharedFrameworks/DVTFoundation.framework/Versions/A/Resources/symbolicatecrash
這裏我用的是手機真機,因此使用的是最後一個,能夠把它拷貝出來。ui
這裏有個問題,咱們打印出來的crash日誌裏面,有代碼的函數名,但有些卻只有函數地址。spa
0 libswiftCore.dylib 0x0000000104198b8c 0x103fa8000 + 2034572 1 libswiftCore.dylib 0x0000000104198b8c 0x103fa8000 + 2034572 2 libswiftCore.dylib 0x0000000104001fc0 0x103fa8000 + 368576
緣由就在於我安裝到手機上的app並非由我當前這臺電腦編譯打包出來的,沒有**.app和**.app.dSYM兩個文件,因此根本沒有辦法把地址同步解析出來。線程
處理方法:
一、在桌面建立一個Crash文件夾,而後去編譯打包的機器上打開Xcode-Window-Organizer,在Archives找到App,右鍵Show in Finder
二、複製**.app和**.app.dSYM到Crash文件夾
三、把前面找到的symbolicatecrash文件以及待解析的MyApp.crash文件也一併複製到Crash目錄下
四、執行命令:./symbolicatecrash MyApp.crash **.app.dSYM > MyApp_symbol.crash
若是解析成功了,就會有函數名了,像下面這樣
Thread 0 Crashed: 0 libobjc.A.dylib 0x300c87ec objc_msgSend + 20 1 MobileLines 0x00006434 -[BoardView setSelectedPiece:] (BoardView.m:321) 2 MobileLines 0x000064c2 -[BoardView touchesBegan:withEvent:] (BoardView.m:349) 3 UIKit 0x30a740ac -[UIWindow sendEvent:] + 264 4 UIKit 0x30a66110 -[UIApplication sendEvent:] + 248
假如查看crash log中的崩潰線程是這樣的:
Thread 0 Crashed: 0 libobjc.A.dylib 0x00003ec0 objc_msgSend + 24 1 MyApp 0x000036d2 0×1000 + 9938
咱們獲得了用戶發生崩潰狀況的內存地址:0x000036d2
而後回到咱們應用程序的build目錄,目錄下必定要包含**.app和**.app.dSYM兩個文件。在控制檯使用dwarfdump命令,就能解析出內存地址,如:
dwarfdump –lookup 0x000036d2 –arch armv6 MyApp.app.dSYM