#pragma mark - app 日誌檔案記錄，用於測試；
- (void)redirectNSLogToDocumentFolder
{
    //如果已經連線Xcode除錯則不輸出到檔案
   /* if(isatty(STDOUT_FILENO)) {
        return;
    }
    */
    UIDevice *device = [UIDevice currentDevice];
    if([[device model] hasSuffix:@"Simulator"]){ //在模擬器不儲存到檔案中
        return;
    }
    
    //將NSlog列印資訊儲存到Document目錄下的Log資料夾下
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *logDirectory = [[paths objectAtIndex:0] stringByAppendingPathComponent:@"Log"];
    
    NSFileManager *fileManager = [NSFileManager defaultManager];
    BOOL fileExists = [fileManager fileExistsAtPath:logDirectory];
    if (!fileExists) {
        [fileManager createDirectoryAtPath:logDirectory  withIntermediateDirectories:YES attributes:nil error:nil];
    }
    
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"zh_CN"]];
    [formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; //每次啟動後都儲存一個新的日誌檔案中
    NSString *dateStr = [formatter stringFromDate:[NSDate date]];
    NSString *logFilePath = [logDirectory stringByAppendingFormat:@"/%@.log",dateStr];
    
    // 將log輸入到檔案
    freopen([logFilePath cStringUsingEncoding:NSASCIIStringEncoding], "a+", stdout);
    freopen([logFilePath cStringUsingEncoding:NSASCIIStringEncoding], "a+", stderr);
    
    //未捕獲的Objective-C異常日誌
    NSSetUncaughtExceptionHandler (&UncaughtExceptionHandler);
}

void UncaughtExceptionHandler(NSException* exception)
{
    NSString* name = [ exception name ];
    NSString* reason = [ exception reason ];
    NSArray* symbols = [ exception callStackSymbols ]; // 異常發生時的呼叫棧
    NSMutableString* strSymbols = [ [ NSMutableString alloc ] init ]; //將呼叫棧拼成輸出日誌的字串
    for ( NSString* item in symbols )
    {
        [ strSymbols appendString: item ];
        [ strSymbols appendString: @"\r\n" ];
    }
    
    //將crash日誌儲存到Document目錄下的Log資料夾下
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *logDirectory = [[paths objectAtIndex:0] stringByAppendingPathComponent:@"Log"];
    
    NSFileManager *fileManager = [NSFileManager defaultManager];
    if (![fileManager fileExistsAtPath:logDirectory]) {
        [fileManager createDirectoryAtPath:logDirectory  withIntermediateDirectories:YES attributes:nil error:nil];
    }
    
    NSString *logFilePath = [logDirectory stringByAppendingPathComponent:@"UncaughtException.log"];
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"zh_CN"]];
    [formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
    NSString *dateStr = [formatter stringFromDate:[NSDate date]];
    
    NSString *crashString = [NSString stringWithFormat:@"<- %@ ->[ Uncaught Exception ]\r\nName: %@, Reason: %@\r\n[ Fe Symbols Start ]\r\n%@[ Fe Symbols End ]\r\n\r\n", dateStr, name, reason, strSymbols];
    //把錯誤日誌寫到檔案中
    if (![fileManager fileExistsAtPath:logFilePath]) {
        [crashString writeToFile:logFilePath atomically:YES encoding:NSUTF8StringEncoding error:nil];
    }else{
        NSFileHandle *outFile = [NSFileHandle fileHandleForWritingAtPath:logFilePath];
        [outFile seekToEndOfFile];
        [outFile writeData:[crashString dataUsingEncoding:NSUTF8StringEncoding]];
        [outFile closeFile];
    }
    
    //把錯誤日誌傳送到郵箱
    //    NSString *urlStr = [NSString stringWithFormat:@"mailto://
 
[email protected]?subject=bug報告&body=感謝您的配合!<br><br><br>錯誤詳情:<br>%@",crashString ];
    //    NSURL *url = [NSURL URLWithString:[urlStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
    //    [[UIApplication sharedApplication] openURL:url];
}