初始化DDLog

DDLogInit.h

//
//  DDLogInit.h
//  ProtocolRecord
//

#import <Foundation/Foundation.h>
#import <CocoaLumberjack/CocoaLumberjack.h>
static const DDLogLevel ddLogLevel = DDLogLevelVerbose;

NS_ASSUME_NONNULL_BEGIN

@interface MyCustomFormatter : NSObject <DDLogFormatter> {
    int loggerCount;
    NSDateFormatter *threadUnsafeDateFormatter;
}
@end

@interface MyLogFileManager : DDLogFileManagerDefault

@end

@interface DDLogInit : NSObject

+(void)init;
@end

NS_ASSUME_NONNULL_END

DDLogInit.m

//
//  DDLogInit.m
//
//

#import "DDLogInit.h"

@implementation MyCustomFormatter

- (id)init {
    if((self = [super init])) {
        threadUnsafeDateFormatter = [[NSDateFormatter alloc] init];
        [threadUnsafeDateFormatter setDateFormat:@"yyyy/MM/dd HH:mm:ss:SSS"];
    }
    return self;
}

- (NSString *)formatLogMessage:(DDLogMessage *)logMessage {
    NSString *logLevel;
    switch (logMessage->_flag) {
        case DDLogFlagError    : logLevel = @"ERROR"; break;
        case DDLogFlagWarning  : logLevel = @"WARINING"; break;
        case DDLogFlagInfo     : logLevel = @"INFO"; break;
        case DDLogFlagDebug    : logLevel = @"DEBUG"; break;
        default                : logLevel = @"VERBOSE"; break;
    }
    
    NSString *dateAndTime = [threadUnsafeDateFormatter stringFromDate:(logMessage->_timestamp)];
    NSString *logMsg = logMessage->_message;
    
    return [NSString stringWithFormat:@"[%@ %@] %@", dateAndTime, logLevel, logMsg];
}

- (void)didAddToLogger:(id <DDLogger>)logger {
    loggerCount++;
    NSAssert(loggerCount <= 1, @"This logger isn't thread-safe");
}

- (void)willRemoveFromLogger:(id <DDLogger>)logger {
    loggerCount--;
}

@end

@implementation MyLogFileManager

-(NSString *)newLogFileName {
    NSString *appName = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleIdentifier"];
    //NSString *timeStamp = [self getTimestamp];
    
    //return [NSString stringWithFormat:@"%@.log", appName, timeStamp];
    return [NSString stringWithFormat:@"%@.log", appName];
}

-(BOOL)isLogFile:(NSString *)fileName {
    return YES;
}

-(NSString *)getTimestamp {
    static dispatch_once_t onceToken;
    static NSDateFormatter *dateFormatter;
    dispatch_once(&onceToken, ^{
        dateFormatter = [NSDateFormatter new];
        [dateFormatter setDateFormat:@"YYYY.MM.dd-HH.mm.ss"];
    });
    
    return [dateFormatter stringFromDate:NSDate.date];
}

@end

@implementation DDLogInit
+(void)init
{
    [DDLog addLogger:[DDOSLogger sharedInstance]];
    MyLogFileManager* logFileManager = [[MyLogFileManager alloc] initWithLogsDirectory:@"/var/mobile/Library/Preferences/ddlog"];
    //MyLogFileManager* logFileManager = [[DDLogFileManagerDefault alloc] initWithLogsDirectory:@"/var/mobile/Library/Preferences/ddlog"];
    //lslogFileManager.maximumNumberOfLogFiles = 1;
    DDFileLogger *fileLogger = [[DDFileLogger alloc] initWithLogFileManager:logFileManager];
    fileLogger.logFormatter = [[MyCustomFormatter alloc] init];
    fileLogger.rollingFrequency = 60 * 60 * 24 * 300;
    fileLogger.maximumFileSize = 1024 * 1024 * 10;
    [DDLog addLogger:fileLogger];
}
@end