iOS Crash异常处理

一. 捕获Crash异常信息

第1种异常(NSException)

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    NSSetUncaughtExceptionHandler(&CrashExceptionHandler);
    return YES;
}

void CrashExceptionHandler(NSException *exception) {
    
    NSArray<NSString *> *callStack = [exception callStackSymbols];
    NSString *reason = [exception reason];
    NSString *name = [exception name]; 
    NSLog(@"原因:%@\n名称:%@\n调用栈:%@", reason, name, callStack);
}

第2种异常(收到系统发出的SIGXXX信号导致Crash)

#include <execinfo.h>(需要引入的函数库)

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    signal(SIGABRT, SignalExceptionHandler);
    signal(SIGILL, SignalExceptionHandler);
    signal(SIGSEGV, SignalExceptionHandler);
    signal(SIGFPE, SignalExceptionHandler);
    signal(SIGBUS, SignalExceptionHandler);
    signal(SIGPIPE, SignalExceptionHandler);
    return YES;
}

void SignalExceptionHandler(int signal)
{
    NSArray *callStack = [AppDelegate backtrace];
    NSLog(@"信号捕获崩溃，堆栈信息：%@",callStack);
    NSString *name = @"LMSignalException";
    NSString *reason = [NSString stringWithFormat:@"signal %d was raised",signal];
    NSLog(@"名称:%@\n原因:%@", name, reason);
}

+ (NSArray *)backtrace {
    
    void* callstack[128];
    int frames = backtrace(callstack, 128);
    char **strs = backtrace_symbols(callstack, frames);
    
    NSMutableArray *backtrace = [NSMutableArray arrayWithCapacity:frames];
    for (int i = 0; i < frames; i++) {
        [backtrace addObject:[NSString stringWithUTF8String:strs[i]]];
    }
    free(strs);
    
    return backtrace;
}

备注：仅仅是捕获异常可能不能满足程序的需求，所以再推荐使用AvoidCrash

二. 防止程序Crash + 捕获Crash异常信息

AvoidCrash的使用方法写的很详细，作者很认真，点赞！