济南网络科技公司,广州网站建设优化公司,单页网站作用是什么,做网站和做游戏哪个难为了在iOS中捕获和处理未捕获的Objective-C异常和系统信号引起的崩溃#xff0c;可以使用NSSetUncaughtExceptionHandler和标准的Unix信号处理机制来实现。这能帮助你记录绝大部分的崩溃信息。以下是详细的实现步骤和代码示例#xff1a;
一、系统崩溃处理
通过NSSetUncaug…为了在iOS中捕获和处理未捕获的Objective-C异常和系统信号引起的崩溃可以使用NSSetUncaughtExceptionHandler和标准的Unix信号处理机制来实现。这能帮助你记录绝大部分的崩溃信息。以下是详细的实现步骤和代码示例
一、系统崩溃处理
通过NSSetUncaughtExceptionHandler捕获未处理的Objective-C异常
#import Foundation/Foundation.h
#import UIKit/UIKit.hinterface UncaughtExceptionHandler : NSObject (void)installUncaughtExceptionHandler:(BOOL)install showAlert:(BOOL)showAlert;end#import UncaughtExceptionHandler.h
#include libkern/OSAtomic.h
#include execinfo.hNSString * const UncaughtExceptionHandlerSignalExceptionName UncaughtExceptionHandlerSignalExceptionName;
NSString * const UncaughtExceptionHandlerSignalKey UncaughtExceptionHandlerSignalKey;
NSString * const UncaughtExceptionHandlerAddressesKey UncaughtExceptionHandlerAddressesKey;
volatile int32_t UncaughtExceptionCount 0;
const int32_t UncaughtExceptionMaximum 10;
static BOOL showAlertView nil;void HandleException(NSException *exception);
void SignalHandler(int signal);
NSString* getAppInfo(void);interface UncaughtExceptionHandler()
property (assign, nonatomic) BOOL dismissed;
endimplementation UncaughtExceptionHandler (void)installUncaughtExceptionHandler:(BOOL)install showAlert:(BOOL)showAlert {if (install showAlert) {[[self alloc] alertView:showAlert];}NSSetUncaughtExceptionHandler(install ? HandleException : NULL);signal(SIGABRT, install ? SignalHandler : SIG_DFL);signal(SIGILL, install ? SignalHandler : SIG_DFL);signal(SIGSEGV, install ? SignalHandler : SIG_DFL);signal(SIGFPE, install ? SignalHandler : SIG_DFL);signal(SIGBUS, install ? SignalHandler : SIG_DFL);signal(SIGPIPE, install ? SignalHandler : SIG_DFL);
}- (void)alertView:(BOOL)show {showAlertView show;
} (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)handleException:(NSException *)exception {[self validateAndSaveCriticalApplicationData:exception];if (!showAlertView) {return;}UIAlertView *alert [[UIAlertView alloc] initWithTitle:出错啦message:你可以尝试继续操作但是应用可能无法正常运行.delegate:selfcancelButtonTitle:退出otherButtonTitles:继续, nil];[alert show];CFRunLoopRef runLoop CFRunLoopGetCurrent();CFArrayRef allModes CFRunLoopCopyAllModes(runLoop);while (!self.dismissed) {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:UncaughtExceptionHandlerSignalExceptionName]) {kill(getpid(), [[[exception userInfo] objectForKey:UncaughtExceptionHandlerSignalKey] intValue]);} else {[exception raise];}
}- (void)alertView:(UIAlertView *)anAlertView clickedButtonAtIndex:(NSInteger)anIndex {if (anIndex 0) {self.dismissed YES;}
}- (void)validateAndSaveCriticalApplicationData:(NSException *)exception {NSString *exceptionInfo [NSString stringWithFormat:\n--------Log Exception---------\nappInfo :\n%\n\nexception name :%\nexception reason :%\nexception userInfo :%\ncallStackSymbols :%\n\n--------End Log Exception-----,getAppInfo(), exception.name, exception.reason, exception.userInfo ?: no user info, [exception callStackSymbols]];NSLog(%, exceptionInfo);// 保存到文件等操作
}endvoid HandleException(NSException *exception) {int32_t exceptionCount OSAtomicIncrement32(UncaughtExceptionCount);if (exceptionCount UncaughtExceptionMaximum) {return;}NSArray *callStack [exception callStackSymbols];NSMutableDictionary *userInfo [NSMutableDictionary dictionaryWithDictionary:[exception userInfo]];[userInfo setObject:callStack forKey:UncaughtExceptionHandlerAddressesKey];[[[UncaughtExceptionHandler alloc] init]performSelectorOnMainThread:selector(handleException:)withObject:[NSException exceptionWithName:[exception name] reason:[exception reason] userInfo:userInfo]waitUntilDone:YES];
}void SignalHandler(int signal) {int32_t exceptionCount OSAtomicIncrement32(UncaughtExceptionCount);if (exceptionCount UncaughtExceptionMaximum) {return;}NSString* description nil;switch (signal) {case SIGABRT:description Signal SIGABRT was raised!;break;case SIGILL:description Signal SIGILL was raised!;break;case SIGSEGV:description Signal SIGSEGV was raised!;break;case SIGFPE:description Signal SIGFPE was raised!;break;case SIGBUS:description Signal SIGBUS was raised!;break;case SIGPIPE:description Signal SIGPIPE was raised!;break;default:description [NSString stringWithFormat:Signal %d was raised!, signal];}NSMutableDictionary *userInfo [NSMutableDictionary dictionary];NSArray *callStack [UncaughtExceptionHandler backtrace];[userInfo setObject:callStack forKey:UncaughtExceptionHandlerAddressesKey];[userInfo setObject:[NSNumber numberWithInt:signal] forKey:UncaughtExceptionHandlerSignalKey];[[[UncaughtExceptionHandler alloc] init]performSelectorOnMainThread:selector(handleException:)withObject:[NSException exceptionWithName:UncaughtExceptionHandlerSignalExceptionName reason:description userInfo:userInfo]waitUntilDone:YES];
}NSString* getAppInfo() {NSString *appInfo [NSString stringWithFormat:App : % %(%)\nDevice : %\nOS Version : % %\n,[[NSBundle mainBundle] objectForInfoDictionaryKey:CFBundleDisplayName],[[NSBundle mainBundle] objectForInfoDictionaryKey:CFBundleShortVersionString],[[NSBundle mainBundle] objectForInfoDictionaryKey:CFBundleVersion],[UIDevice currentDevice].model,[UIDevice currentDevice].systemName,[UIDevice currentDevice].systemVersion];return appInfo;
}
在didFinishLaunchingWithOptions中调用installUncaughtExceptionHandler
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {[UncaughtExceptionHandler installUncaughtExceptionHandler:YES showAlert:YES];return YES;
}
二、处理Signal
在Xcode中测试Signal类型崩溃时需在调试控制台输入以下命令以允许Signal回调进入处理函数 pro hand -p true -s false SIGABRT 三、测试代码
- (void)viewDidLoad {[super viewDidLoad];[self exceptionHandlerTest1];// [self exceptionHandlerTest2];// [self exceptionHandlerTest3];
}/// 异常处理测试1
-(void)exceptionHandlerTest1{NSArray *array [tom,xxx,ooo];[array objectAtIndex:5];
}/// 异常处理测试2
-(void)exceptionHandlerTest2{[self performSelector:selector(string) withObject:nil afterDelay:2.0];
}/// 异常处理测试3
-(void)exceptionHandlerTest3{int list[2]{1,2};int *p list;free(p);p[1] 5;
}
