iOS 拦截崩溃处理

ios app一旦提交就很难在对源进行线上修改  所以关键就是少出错少崩溃。 下面介绍一下崩溃拦截处理 可以用于崩溃日记收集 和 提高用户体验
首先在AppDelegate.m的- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions ;方法里,添加这句代码:InstallUncaughtExceptionHandler();// 拦截崩溃.当然,这个也可以在你建立好崩溃拦截的类后来添加.都是一样的.
生成一个继承于NSObject的类, .h文件里写上下面这些就够了.h 文件代码:
import <Foundation/Foundation.h>
import <UIKit/UIKit.h>
@interface UncaughtExceptionHandler : NSObject{BOOL dismissed;}@endvoid HandleException(NSException *exception);void SignalHandler(int signal);void InstallUncaughtExceptionHandler(void);
然后就是核心代码了,.会为你一一呈现.m 文件代码:
import "UncaughtExceptionHandler.h"
include <libkern/OSAtomic.h>
include <execinfo.h>
NSString *const UncaughtExceptionHandlerSignalExceptionName =@"UncaughtExceptionHandlerSignalExceptionName";NSString *const UncaughtExceptionHandlerSignalKey =@"UncaughtExceptionHandlerSignalKey";NSString *const UncaughtExceptionHandlerAddressesKey =@"UncaughtExceptionHandlerAddressesKey";
volatile int32_t UncaughtExceptionCount =0;const int32_t UncaughtExceptionMaximum =10;
const NSInteger UncaughtExceptionHandlerSkipAddressCount =4;const NSInteger UncaughtExceptionHandlerReportAddressCount =5;
@implementation UncaughtExceptionHandler
// 程序崩溃2(程序崩溃第二步走的方法)
(NSArray )backtrace {void callstack[128];int frames =backtrace(callstack, 128);char **strs =backtrace_symbols(callstack, frames);int i;NSMutableArray *backtrace = [NSMutableArray arrayWithCapacity:frames];for (i = UncaughtExceptionHandlerSkipAddressCount ; i <UncaughtExceptionHandlerSkipAddressCount +UncaughtExceptionHandlerReportAddressCount; i++){[backtrace addObject:[NSString stringWithUTF8String:strs[i]]];}free(strs);return backtrace;}
(void)alertView:(UIAlertView *)anAlertView clickedButtonAtIndex:(NSInteger)anIndex {if (anIndex ==0){dismissed =YES;}else if (anIndex==1) {NSLog(@"ssssssss");}}
(void)validateAndSaveCriticalApplicationData {// 崩溃拦截可以做的事,写在这个方法也是极好的}// 程序崩溃3(程序崩溃是第三进入的方法)
(void)handleException:(NSException *)exception {[self validateAndSaveCriticalApplicationData];
//这里可以打印或者显示出ERROR的原因.//    NSString *message = [NSString stringWithFormat:NSLocalizedString(@"如果点击继续，程序有可能会出现其他的问题，建议您还是点击退出按钮并重新打开"@"异常原因如下:\n%@\n%@",nil),[exception reason],[[exception userInfo] objectForKey:UncaughtExceptionHandlerAddressesKey]];
//设置弹出框来了提醒用户, 当然也可以是自己设计其他内容,NSString *message = [NSString stringWithFormat:NSLocalizedString(@"如果点击继续，程序有可能会出现其他的问题，建议您还是点击退出按钮并重新打开",nil)];UIAlertView *alert =[[UIAlertView alloc]initWithTitle:NSLocalizedString(@"抱歉，程序出现了异常",nil)message:messagedelegate:selfcancelButtonTitle:NSLocalizedString(@"继续",nil)otherButtonTitles:NSLocalizedString(@"退出",nil), nil];[alert show];
// 利用RunLoop , 来完成拦截的操作CFRunLoopRef runLoop = CFRunLoopGetCurrent();CFArrayRef allModes = CFRunLoopCopyAllModes(runLoop);
while (!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);[exception raise];if ([[exception name] isEqual:UncaughtExceptionHandlerSignalExceptionName]) {    kill(getpid(), [[[exception userInfo] objectForKey:UncaughtExceptionHandlerSignalKey]intValue]);}else{    [exception raise];}
}
@end
// 程序崩溃时1(程序崩溃是首先进入的方法, 你可以debug自己调试)
void HandleException(NSException *exception) {
int32_t exceptionCount =OSAtomicIncrement32(&UncaughtExceptionCount);
if (exceptionCount >UncaughtExceptionMaximum) {
return;
}
NSArray *callStack = [UncaughtExceptionHandler backtrace];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;
}
NSMutableDictionary *userInfo =[NSMutableDictionary dictionaryWithObject:[NSNumber numberWithInt:signal] forKey:UncaughtExceptionHandlerSignalKey];NSArray *callStack = [UncaughtExceptionHandler backtrace];[userInfo setObject:callStack forKey:UncaughtExceptionHandlerAddressesKey];[[[UncaughtExceptionHandler alloc] init] performSelectorOnMainThread:@selector(handleException:)withObject:[NSException exceptionWithName:UncaughtExceptionHandlerSignalExceptionName reason:[NSString stringWithFormat:NSLocalizedString(@"Signal %d was raised.",nil),signal]userInfo:                                                                                                          [NSDictionary dictionaryWithObject:[NSNumber numberWithInt:signal]forKey:UncaughtExceptionHandlerSignalKey]]waitUntilDone:YES];
}
//. 进入程序时(在AppDelegate.m)里添加那行代码后,就会启用这行代码了
void InstallUncaughtExceptionHandler(void) {
NSSetUncaughtExceptionHandler(&HandleException);signal(SIGHUP, SignalHandler); signal(SIGINT, SignalHandler);signal(SIGQUIT, SignalHandler);signal(SIGABRT,SignalHandler);signal(SIGILL,SignalHandler);signal(SIGSEGV,SignalHandler);signal(SIGFPE,SignalHandler);signal(SIGBUS,SignalHandler);signal(SIGPIPE,SignalHandler);
}
//好啦,这些就完全够了,当你的程序遇到崩溃的时候, 就会稳稳的跳出提示信息, 继续就真的崩溃的, 退出就不会进行下一步操作了.还有一点要注意,当你连到真机上测试的时候,这个崩溃只会提示一次,你再次点击的时候他就不弹出提示而是直接崩溃了,所以你要是测试的话,把程序运行后, 拔掉真机, 不要连接电脑就可以了.