IOS应用崩溃复活
【IOS应用崩溃复活】IOS应用崩溃一直是一个很苦恼的问题，而崩溃的同时又未获取bug原因，更令人苦恼。
好在苹果自带的crash检测api，以及runloop可以让应用复活一次，不过第二次依旧会崩溃，但是还是一个很实用的小技巧。
以下是IOS崩溃复活的类和使用方法
#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 @interface CrashHandler : NSObject
{
BOOL ignore;
}+ (instancetype)sharedInstance;
@end//.m文件
#import "CrashHandler.h"
#import
#include
#include 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.捕获一些异常导致的崩溃
NSSetUncaughtExceptionHandler(&HandleException);
// 2.捕获非异常情况，通过signal传递出来的崩溃
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:@"崩溃原因如下:\n%@\n%@",
[exception reason],
[[exception userInfo] objectForKey:kCaughtExceptionStackInfoKey]];
NSLog(@"%@",message);
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"程序崩溃了"
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)
{
// 获取异常的堆栈信息
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)
{
// 这种情况的崩溃信息，就另某他法来捕获吧
NSArray *callStack = [CrashHandler backtrace];
NSLog(@"信号捕获崩溃，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];
}
推荐阅读
- Docker应用:容器间通信与Mariadb数据库主从复制
- JS中的各种宽高度定义及其应用
- 2020-04-07vue中Axios的封装和API接口的管理
- iOS中的Block
- 记录iOS生成分享图片的一些问题，根据UIView生成固定尺寸的分享图片
- java之static、static|java之static、static final、final的区别与应用
- Android7.0|Android7.0 第三方应用无法访问私有库
- GIS跨界融合赋能多领域技术升级，江淮大地新应用成果喜人
- 2019-08-29|2019-08-29 iOS13适配那点事
- Hacking|Hacking with iOS: SwiftUI Edition - SnowSeeker 项目（一）