关于ios:IOS应用崩溃复活

IOS利用解体始终是一个很苦恼的问题，而解体的同时又未获取bug起因，更令人苦恼。
好在苹果自带的crash检测api，以及runloop能够让利用复活一次，不过第二次依旧会解体，然而还是一个很实用的小技巧。
以下是IOS解体复活的类和应用办法

#import "CrashHandler.h"//Appdelagte中注册crash记录上报- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {  // Override point for customization after application launch.  [CrashHandler sharedInstance];  return YES;}//.h文件#import <Foundation/Foundation.h>@interface CrashHandler : NSObject{  BOOL ignore;}+ (instancetype)sharedInstance;@end//.m文件#import "CrashHandler.h"#import <UIKit/UIKit.h>#include <libkern/OSAtomic.h>#include <execinfo.h>NSString * const kSignalExceptionName = @"kSignalExceptionName";NSString * const kSignalKey = @"kSignalKey";NSString * const kCaughtExceptionStackInfoKey = @"kCaughtExceptionStackInfoKey";void HandleException(NSException *exception);void SignalHandler(int signal);@implementation CrashHandlerstatic CrashHandler *instance = nil;+ (instancetype)sharedInstance{  static dispatch_once_t onceToken;  dispatch_once(&onceToken, ^{    instance = [[[self class] alloc] init];  });  return instance;}+ (instancetype)allocWithZone:(struct _NSZone *)zone{  static dispatch_once_t onceToken;  dispatch_once(&onceToken, ^{    instance = [super allocWithZone:zone];  });  return instance;}- (instancetype)init{  self = [super init];  if (self) {    [self setCatchExceptionHandler];  }  return self;}- (void)setCatchExceptionHandler{  // 1.捕捉一些异样导致的解体  NSSetUncaughtExceptionHandler(&HandleException);     // 2.捕捉非异常情况，通过signal传递进去的解体  signal(SIGABRT, SignalHandler);  signal(SIGILL, SignalHandler);  signal(SIGSEGV, SignalHandler);  signal(SIGFPE, SignalHandler);  signal(SIGBUS, SignalHandler);  signal(SIGPIPE, SignalHandler);}+ (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;}- (void)alertView:(UIAlertView *)anAlertView clickedButtonAtIndex:(NSInteger)anIndex{  if (anIndex == 0) {    ignore = YES;  } else if (anIndex == 1) {    NSLog(@"起死回生");  }}- (void)handleException:(NSException *)exception{  NSString *message = [NSString stringWithFormat:@"解体起因如下:\n%@\n%@",             [exception reason],             [[exception userInfo] objectForKey:kCaughtExceptionStackInfoKey]];  NSLog(@"%@",message);     UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"程序解体了"                          message:@"如果你能让程序起死回生，那你的决定是？"                          delegate:self                     cancelButtonTitle:@"崩就蹦吧"                     otherButtonTitles:@"起死回生", nil];  [alert show];     CFRunLoopRef runLoop = CFRunLoopGetCurrent();  CFArrayRef allModes = CFRunLoopCopyAllModes(runLoop);     while (!ignore) {    for (NSString *mode in (__bridge NSArray *)allModes) {      CFRunLoopRunInMode((CFStringRef)mode, 0.001, false);    }  }     CFRelease(allModes);     NSSetUncaughtExceptionHandler(NULL);  signal(SIGABRT, SIG_DFL);  signal(SIGILL, SIG_DFL);  signal(SIGSEGV, SIG_DFL);  signal(SIGFPE, SIG_DFL);  signal(SIGBUS, SIG_DFL);  signal(SIGPIPE, SIG_DFL);     if ([[exception name] isEqual:kSignalExceptionName]) {    kill(getpid(), [[[exception userInfo] objectForKey:kSignalKey] intValue]);  } else {    [exception raise];  }}@endvoid HandleException(NSException *exception){  // 获取异样的堆栈信息  NSArray *callStack = [exception callStackSymbols];  NSMutableDictionary *userInfo = [NSMutableDictionary dictionary];  [userInfo setObject:callStack forKey:kCaughtExceptionStackInfoKey];     CrashHandler *crashObject = [CrashHandler sharedInstance];  NSException *customException = [NSException exceptionWithName:[exception name] reason:[exception reason] userInfo:userInfo];  [crashObject performSelectorOnMainThread:@selector(handleException:) withObject:customException waitUntilDone:YES];}void SignalHandler(int signal){  // 这种状况的解体信息，就另某他法来捕捉吧  NSArray *callStack = [CrashHandler backtrace];  NSLog(@"信号捕捉解体，堆栈信息：%@",callStack);     CrashHandler *crashObject = [CrashHandler sharedInstance];  NSException *customException = [NSException exceptionWithName:kSignalExceptionName                              reason:[NSString stringWithFormat:NSLocalizedString(@"Signal %d was raised.", nil),signal]                             userInfo:@{kSignalKey:[NSNumber numberWithInt:signal]}];     [crashObject performSelectorOnMainThread:@selector(handleException:) withObject:customException waitUntilDone:YES];}