iOS开发 - 文件压缩与解压缩

第三方解压缩框架——SSZipArchive

下载地址：https://github.com/samsoffes/ssziparchive
注意：需要引入libz.dylib框架

// Unzipping
NSString *zipPath = @"path_to_your_zip_file";
NSString *destinationPath =@"path_to_the_folder_where_you_want_it_unzipped";
[SSZipArchive unzipFileAtPath:zipPath toDestination:destinationPath];

// Zipping
NSString *zippedPath = @"path_where_you_want_the_file_created";
NSArray *inputPaths = [NSArray arrayWithObjects:
                       [[NSBundle mainBundle] pathForResource:@"photo1" ofType:@"jpg"],
                       [[NSBundle mainBundle] pathForResource:@"photo2" ofType:@"jpg"]
                       nil];
[SSZipArchive createZipFileAtPath:zippedPath withFilesAtPaths:inputPaths];

一、技术方案
1.第三方框架：SSZipArchive
2.依赖的动态库：libz.dylib

二、压缩1
1.第一个方法
/**
zipFile ：产生的zip文件的最终路径
directory ： 需要进行的压缩的文件夹路径
*/

[SSZipArchive createZipFileAtPath:zipFile withContentsOfDirectory:directory];

2.第一个方法
/**
zipFile ：产生的zip文件的最终路径
files ： 这是一个数组，数组里面存放的是需要压缩的文件的路径
files = @[@”/Users/apple/Destop/1.png”, @”/Users/apple/Destop/3.txt”]
*/

[SSZipArchive createZipFileAtPath:zipFile withFilesAtPaths:files];

三、解压缩
/**
zipFile ：需要解压的zip文件的路径
dest ： 解压到什么地方
*/

[SSZipArchive unzipFileAtPath:zipFile toDestination:dest];

文件压缩实例

#import "MalJobViewController.h"
#import "SSZipArchive.h"

#define MalJobFileBoundary @"heima"
#define MalJobNewLine @"\r\n"
#define MalJobEncode(str) [str dataUsingEncoding:NSUTF8StringEncoding]

@interface MalJobViewController ()

@end

@implementation MalJobViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

}

- (NSString *)MIMEType:(NSURL *)url
{
    // 1.创建一个请求
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    // 2.发送请求（返回响应）
    NSURLResponse *response = nil;
    [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil];
    // 3.获得MIMEType
    return response.MIMEType;
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSString *caches = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];

    // 0.获得需要压缩的文件夹
    NSString *images = [caches stringByAppendingPathComponent:@"images"];

    // 1.创建一个zip文件（压缩）
    NSString *zipFile = [caches stringByAppendingPathComponent:@"images.zip"];

    BOOL result = [SSZipArchive createZipFileAtPath:zipFile withContentsOfDirectory:images];
    if(result) {
        NSString *MIMEType = [self MIMEType:[NSURL fileURLWithPath:zipFile]];
        NSData *data = [NSData dataWithContentsOfFile:zipFile];
        [self upload:@"images.zip" mimeType:MIMEType fileData:data params:@{@"username" : @"lisi"}];
    }
}


- (void)upload:(NSString *)filename mimeType:(NSString *)mimeType fileData:(NSData *)fileData params:(NSDictionary *)params
{
    // 1.请求路径
    NSURL *url = [NSURL URLWithString:@"http://192.168.15.172:8080/Server/upload"];

    // 2.创建一个POST请求
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
    request.HTTPMethod = @"POST";

    // 3.设置请求体
    NSMutableData *body = [NSMutableData data];

    // 3.1.文件参数
    [body appendData:MalJobEncode(@"--")];
    [body appendData:MalJobEncode(MalJobFileBoundary)];
    [body appendData:MalJobEncode(MalJobNewLine)];

    NSString *disposition = [NSString stringWithFormat:@"Content-Disposition: form-data; name=\"file\"; filename=\"%@\"", filename];
    [body appendData:MalJobEncode(disposition)];
    [body appendData:MalJobEncode(MalJobNewLine)];

    NSString *type = [NSString stringWithFormat:@"Content-Type: %@", mimeType];
    [body appendData:MalJobEncode(type)];
    [body appendData:MalJobEncode(MalJobNewLine)];

    [body appendData:MalJobEncode(MalJobNewLine)];
    [body appendData:fileData];
    [body appendData:MalJobEncode(MalJobNewLine)];

    // 3.2.非文件参数
    [params enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
        [body appendData:MalJobEncode(@"--")];
        [body appendData:MalJobEncode(MalJobFileBoundary)];
        [body appendData:MalJobEncode(MalJobNewLine)];

        NSString *disposition = [NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"", key];
        [body appendData:MalJobEncode(disposition)];
        [body appendData:MalJobEncode(MalJobNewLine)];

        [body appendData:MalJobEncode(MalJobNewLine)];
        [body appendData:MalJobEncode([obj description])];
        [body appendData:MalJobEncode(MalJobNewLine)];
    }];

    // 3.3.结束标记
    [body appendData:MalJobEncode(@"--")];
    [body appendData:MalJobEncode(MalJobFileBoundary)];
    [body appendData:MalJobEncode(@"--")];
    [body appendData:MalJobEncode(MalJobNewLine)];

    request.HTTPBody = body;

    // 4.设置请求头(告诉服务器这次传给你的是文件数据，告诉服务器现在发送的是一个文件上传请求)
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", MalJobFileBoundary];
    [request setValue:contentType forHTTPHeaderField:@"Content-Type"];

    // 5.发送请求
    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
        NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
        NSLog(@"%@", dict);
    }];
}
@end

文件解压缩实例

#import "MalJobViewController.h"
#import "SSZipArchive.h"
@implementation MalJobViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSURL *url = [NSURL URLWithString:@"http://localhost:8080/Server/resources/images.zip"];

    NSURLSessionDownloadTask *task = [[NSURLSession sharedSession] downloadTaskWithURL:url completionHandler:^(NSURL *location, NSURLResponse *response, NSError *error) {
        NSString *caches = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];
        [SSZipArchive unzipFileAtPath:location.path toDestination:caches];
    }];
    [task resume];
}

@end