iOS崩溃 捕获异常处理

之前博客介绍啦一种异常捕获后弹窗提示用户的方法，《iOS崩溃 捕获异常处理》，下面提供另外一种异常捕获的方法。原理一致，但实现略有不同。可供参考。

1、在didFinishLaunchingWithOptions 中，注册消息处理函数，处理崩溃信息，写入本地。

 //注册消息处理函数的处理方法,处理崩溃信息,写入本地    NSSetUncaughtExceptionHandler(&uncaughtExceptionHandler);
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2、将CrashManager.h、 CrashManager.m 拖拽到工程中，具体实现如下： 
CrashManager.h：

@interface CrashManager : NSObject/** 捕捉Crash */void uncaughtExceptionHandler(NSException *exception);+ (id)defaultManager;//单例/** 移除Crash的log日志 */- (void)clearCrashLog;/** 是否有log日志 */- (BOOL)isCrashLog;/** crash log日志 */- (NSString *)crashLogContent;@end
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CrashManager.m 中核心函数如下：

void uncaughtExceptionHandler(NSException *exception){    // 异常的堆栈信息    NSArray *stackArray = [exception callStackSymbols];    // 出现异常的原因    NSString *reason = [exception reason];    // 异常名称    NSString *name = [exception name];    NSString *exceptionInfo = [NSString stringWithFormat:@"Exception reason：%@\nException name：%@\nException stack：%@",name, reason, stackArray];    NSLog(@"%@", exceptionInfo);    NSMutableArray *tmpArr = [NSMutableArray arrayWithArray:stackArray];    [tmpArr insertObject:reason atIndex:0];    NSString *crashLocalPath = [NSString stringWithFormat:@"%@/Documents/microFinanceCrashError.txt",NSHomeDirectory()];    NSLog(@"crash LocalPath :%@ ",crashLocalPath);    //保存到本地  --  当然你可以在下次启动的时候，上传这个log    [exceptionInfo writeToFile:crashLocalPath  atomically:YES encoding:NSUTF8StringEncoding error:nil]；}
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+ (id)defaultManager{    @synchronized(self){        static dispatch_once_t pred;        dispatch_once(&pred, ^{            crashManager = [[self alloc] init];        });    }    return crashManager;}#pragma mark -移除Crash的log日志- (void)clearCrashLog{    NSFileManager *fileManager = [[NSFileManager alloc]init];    [fileManager removeItemAtPath:LocalCrashLogPath error:nil];}#pragma mark - 是否有log日志- (BOOL)isCrashLog{    NSError *error;    NSString *textFileContents = [NSString stringWithContentsOfFile:LocalCrashLogPath encoding:NSUTF8StringEncoding error:&error];    if ([self checkConvertNull:textFileContents]) {//无log日志        return NO;    }else{        return YES;    }}#pragma mark -crash log日志- (NSString *)crashLogContent{    NSError *error;    NSString *textFileContents = [NSString stringWithContentsOfFile:LocalCrashLogPath encoding:NSUTF8StringEncoding error:&error];    if ([self checkConvertNull:textFileContents]) {//无log日志        return @"";    }else{        return textFileContents;    }}#pragma mark - 检查是否有空字符- (BOOL)checkConvertNull:(NSString *)object{    if ([object isEqual:[NSNull null]] || [object isKindOfClass:[NSNull class]] ||object==nil || [object isEqualToString:@""]) {        return YES;    }else{        return NO;    }}
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3、在ViewController中，做如下测试案例：

- (void)viewDidLoad {    [super viewDidLoad];    CrashManager *crashManager = [CrashManager defaultManager];    if ([crashManager isCrashLog]) {//Crash日志        NSString *crashString = [crashManager crashLogContent];//Crash日志内容        NSLog(@"crashString = %@",crashString);//    }//    [crashManager clearCrashLog];//清除Crash日志    //Crash测试    UIButton *crashBtn = [UIButton buttonWithType:UIButtonTypeCustom];    crashBtn.frame = CGRectMake(self.view.frame.size.width/2 - 50, 200, 100, 40);    crashBtn.backgroundColor = [UIColor redColor];    [crashBtn addTarget:self action:@selector(crashTest) forControlEvents:UIControlEventTouchUpInside];    [crashBtn setTitle:@"Crash" forState:UIControlStateNormal];    [crashBtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];    [self.view addSubview:crashBtn];}-(void)crashTest{    NSString *crashString = nil;    NSDictionary *params = [NSDictionary dictionary];    params = @{@"crashTest":crashString,               };}
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Demo地址：https://github.com/heroBlog/CrashManager