使用CocoaLumberjack时，自定义的log文件名

// Log.h
#import "CocoaLumberjack.h"

@interface CustomLogFileManager : DDLogFileManagerDefault

- (instancetype)initWithLogsDirectory:(NSString *)logsDirectory fileName:(NSString *)name;

@end

// Log.m
#import <Foundation/Foundation.h>

#import "Log.h"

@interface CustomLogFileManager ()

@property (nonatomic, copy) NSString *fileName;

@end

@implementation CustomLogFileManager

#pragma mark - Lifecycle method

- (instancetype)initWithLogsDirectory:(NSString *)logsDirectory
                             fileName:(NSString *)name
{
    self = [super initWithLogsDirectory:logsDirectory];
    if (self) {
        self.fileName = name;
    }
    return self;
}

#pragma mark - Override methods

- (NSString *)newLogFileName
{
    return [NSString stringWithFormat:@"%@", self.fileName];
}

- (BOOL)isLogFile:(NSString *)fileName
{
    return [fileName isEqualToString:self.fileName];
}

@end