压缩使用SSZipArchive
默认压缩加密，密码为生成的时间格式

主要代码：

单个文件或文件夹使用，传入@"Library/Caches/WLogs"或@"Library/Caches/WLogs/xxxx.log"
+ (nullable NSString *)zipLogWithFilePath:(nullable NSString *)filePath

多个文件或文件夹使用：传入[@"Documents/WLogs", @"Library/Caches/WLogs", @"Library/Caches/WLogs/xxxx.log"]
+ (nullable NSString *)zipLogWithFilePath:(nonnull NSArray<NSString *> *)filePaths

头文件：WLLogUploadManager.h

#import <Foundation/Foundation.h>

NS_ASSUME_NONNULL_BEGIN

@interface WLLogUploadManager : NSObject

/// 上传zip文件
/// @param filePath 日志文件(夹)路径：nil上传自己写入的日志
+ (void)uploadFileWithPath:(nullable NSString *)filePath;

@end

NS_ASSUME_NONNULL_END

实现文件：WLLogUploadManager.m

#import "WLLogUploadManager.h"

#import <SSZipArchive/ZipArchive.h> //【压缩】

@implementation WLLogUploadManager

#pragma mark - 上传
/// 上传zip文件
/// @param filePath 日志文件(夹)路径：nil上传自己写入的日志
+ (void)uploadFileWithPath:(nullable NSString *)filePath {
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
        NSString *zipPath = nil;
        //不存在，默认上传自己打印的日志
        if (!filePath || ![filePath isKindOfClass:NSString.class] || filePath.length <= 0) {
            zipPath = self.zipMyLog;
        } else {
            zipPath = [self zipLogWithFilePath:filePath];
        }
        if (zipPath) {
            long long fileSize = [self fileSizeAtPath:zipPath]; //计算文件大小
            NSLog(@"[uploadLog] uploadLogWithPath fileSize = [%lld]", fileSize);
            //【上传文件】
            [[WLUploadManager shareInstance] uploadFileWithPath:zipPath finishBlock:^(NSError *error, NSString *url) {
                NSLog(@"[uploadLog] uploadLogWithPath finish url = [%@], error = [%@]", url, error);
                NSFileManager *fileManager = NSFileManager.defaultManager;
                if ([fileManager fileExistsAtPath:zipPath]) {
                    [fileManager removeItemAtPath:zipPath error:nil];
                }
            }];
        }
    });
}

#pragma mark - 压缩
/// 压缩自己打印的日志
+ (nullable NSString *)zipMyLog {
    NSString *sourceFilePath = @"Library/Caches/WLogs"; //WLogs日志文件夹
    NSString *destinationPath = [self zipLogWithFilePath:sourceFilePath];
    return destinationPath;
}

/// 根据文件(夹)路径压缩成zip文件
/// @param filePath 文件(夹)路径：@"Library/Caches/WLogs"或@"Library/Caches/WLogs/xxxx.log"
/// @return 返回压缩成功的zip路径：系统目录/tmp/xxx 或为 nil
+ (nullable NSString *)zipLogWithFilePath:(nullable NSString *)filePath {
    NSLog(@"[uploadLog] zipLogWithFilePath = [%@]", filePath);
    NSString *destinationPath = nil;
    if (!filePath || ![filePaths isKindOfClass:NSString.class] || filePath.length == 0) {
        return destinationPath;
    }

    NSString *homeDirectory = NSHomeDirectory();
    NSString *sourceFilePath = [homeDirectory stringByAppendingPathComponent:filePath];
    NSLog(@"[uploadLog] zipLogWithFilePath sourceFilePath = [%@]", sourceFilePath);

    BOOL isDirectory = NO;
    if ([[NSFileManager defaultManager] fileExistsAtPath:sourceFilePath isDirectory:&isDirectory]) {
        NSString *tempDirectory = NSTemporaryDirectory(); //压缩日志存放Temp目录下
        NSString *dateString = [self getCurrentTimeString]; //格式当前时间
        destinationPath = [tempDirectory stringByAppendingFormat:@"iOS_%@.zip",  dateString]; //最终压缩文件，tmp/iOS_当前时间戳.zip
        
        BOOL success = NO;
        if (isDirectory) {
            success = [SSZipArchive createZipFileAtPath:destinationPath withContentsOfDirectory:sourceFilePath withPassword:dateString]; //【压缩】文件夹
        } else {
            success = [SSZipArchive createZipFileAtPath:destinationPath withFilesAtPaths:@[sourceFilePath] withPassword:dateString]; //【压缩】文件
        }
        if (!success) {
            destinationPath = nil;
        }
    }
    NSLog(@"[uploadLog] zipLogWithFilePath destinationPath = [%@]", destinationPath);
    return destinationPath;
}

/// 根据文件(夹)路径压缩成zip文件
/// @param filePaths 多个文件(夹)路径：[@"Documents/WLogs", @"Library/Caches/WLogs", @"Library/Caches/WLogs/xxxx.log"]
/// @return 返回压缩成功的zip路径：系统目录/tmp/xxx 或为 nil(不会删除压缩好的zip)
+ (nullable NSString *)zipLogWithFilePath:(nonnull NSArray<NSString *> *)filePaths {
    NSLog(@"[uploadLog] 开始 zipLogWithFilePath = [%@]", filePaths);
    NSString *destinationPath = nil;
    if (!filePaths || ![filePaths isKindOfClass:NSArray.class] || filePaths.count == 0) {
        return destinationPath;
    }
    
    NSString *tempDirectory = NSTemporaryDirectory(); //压缩日志存放Temp目录下
    //NSString *dateString = [self getCurrentTimeString]; //格式当前时间
    NSDate *currentDate = [NSDate date];
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"yyyyMMddHHmmss"];
    NSString *dateString = [dateFormatter stringFromDate:currentDate];
    
    destinationPath = [tempDirectory stringByAppendingFormat:@"iOS_%@.zip", dateString]; //最终压缩文件成品，tmp/iOS_当前时间戳.zip
    NSString *zipPath = [tempDirectory stringByAppendingPathComponent:dateString]; //临时文件，压缩此文件的内容
    NSLog(@"[uploadLog] zipPath = [%@]", zipPath);
    
    NSFileManager *fileManager = [NSFileManager defaultManager];
    //创建临时文件
    BOOL isExistDic = [fileManager fileExistsAtPath:zipPath];
    if (!isExistDic){
        [fileManager createDirectoryAtPath:zipPath withIntermediateDirectories:YES attributes:nil error:nil];
    }
    
    BOOL needZip = NO;
    for (NSString *filePath in filePaths) {
        if (filePath && [filePath isKindOfClass:NSString.class]) {
            NSString *sourceFilePath = [NSHomeDirectory() stringByAppendingPathComponent:filePath];
            NSLog(@"[uploadLog] sourceFilePath = [%@]", sourceFilePath);
            if ([fileManager fileExistsAtPath:sourceFilePath isDirectory:nil]) {
                NSString *toPath = [zipPath stringByAppendingPathComponent:filePath.lastPathComponent];
                NSLog(@"[uploadLog] copy toPath = [%@]", toPath);
                if ([fileManager copyItemAtPath:sourceFilePath toPath:toPath error:nil]) {
                    needZip = YES;
                }
            }
        }
    }
    
    NSLog(@"[uploadLog] zipLogWithFilePath needZip=[%d] zipPath = [%@]", needZip, zipPath);
    BOOL success = NO;
    if (needZip) {
        success = [PASCSSZipArchive createZipFileAtPath:destinationPath withContentsOfDirectory:zipPath withPassword:dateString]; //【压缩】文件夹
        //删除临时文件
        if ([fileManager fileExistsAtPath:zipPath]) {
            [fileManager removeItemAtPath:zipPath error:nil];
        }
    }
    
    if (!success) {
        destinationPath = nil;
    }
    NSLog(@"[uploadLog] 结束 zipLogWithFilePath destinationPath = [%@]", destinationPath);
    return destinationPath;
}

#pragma mark - 其他
/// 计算文件大小
/// @param filePath 文件路径
/// @return 返回大小或0，单位：字节
+ (long long)fileSizeAtPath:(nullable NSString *)filePath {
    NSFileManager *manager = [NSFileManager defaultManager];
    if ([manager fileExistsAtPath:filePath]){
        return [[manager attributesOfItemAtPath:filePath error:nil] fileSize];
    }
    return 0;
}

/// 获取当前时间
/// @return 返回格式为yyyyMMddHHmmss的字符串
+ (nonnull NSString *)getCurrentTimeString {
    NSDate *currentDate = [NSDate date];
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"yyyyMMddHHmmss"];
    NSString *dateString = [dateFormatter stringFromDate:currentDate];
    return dateString;
}

@end