iOS开发——网络编程OC篇&（八）文件压缩与解压

浏览数：125 / 时间：2015年06月11日

文件压缩与解压

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];

一：文件压缩

 1 - (NSString *)MIMEType:(NSURL *)url
 2 {
 3     // 1.创建一个请求
 4     NSURLRequest *request = [NSURLRequest requestWithURL:url];
 5     // 2.发送请求（返回响应）
 6     NSURLResponse *response = nil;
 7     [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil];
 8     // 3.获得MIMEType
 9     return response.MIMEType;
10 }
11 
12 - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
13 {
14     NSString *caches = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];
15 
16     // 0.获得需要压缩的文件夹
17     NSString *images = [caches stringByAppendingPathComponent:@"images"];
18     
19     // 1.创建一个zip文件（压缩）
20     NSString *zipFile = [caches stringByAppendingPathComponent:@"images.zip"];
21 
22     BOOL result = [SSZipArchive createZipFileAtPath:zipFile withContentsOfDirectory:images];
23     if(result) {
24         NSString *MIMEType = [self MIMEType:[NSURL fileURLWithPath:zipFile]];
25         NSData *data = [NSData dataWithContentsOfFile:zipFile];
26         [self upload:@"images.zip" mimeType:MIMEType fileData:data params:@{@"username" : @"lisi"}];
27     }
28 }
29 
30 
31 - (void)upload:(NSString *)filename mimeType:(NSString *)mimeType fileData:(NSData *)fileData params:(NSDictionary *)params
32 {
33     // 1.请求路径
34     NSURL *url = [NSURL URLWithString:@"http://192.168.15.172:8080/MJServer/upload"];
35     
36     // 2.创建一个POST请求
37     NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
38     request.HTTPMethod = @"POST";
39     
40     // 3.设置请求体
41     NSMutableData *body = [NSMutableData data];
42     
43     // 3.1.文件参数
44     [body appendData:iCocosEncode(@"--")];
45     [body appendData:iCocosEncode(iCocosFileBoundary)];
46     [body appendData:iCocosEncode(iCocosNewLien)];
47     
48     NSString *disposition = [NSString stringWithFormat:@"Content-Disposition: form-data; name=\"file\"; filename=\"%@\"", filename];
49     [body appendData:iCocosEncode(disposition)];
50     [body appendData:iCocosEncode(iCocosNewLien)];
51     
52     NSString *type = [NSString stringWithFormat:@"Content-Type: %@", mimeType];
53     [body appendData:iCocosEncode(type)];
54     [body appendData:iCocosEncode(iCocosNewLien)];
55     
56     [body appendData:iCocosEncode(iCocosNewLien)];
57     [body appendData:fileData];
58     [body appendData:iCocosEncode(iCocosNewLien)];
59     
60     // 3.2.非文件参数
61     [params enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
62         [body appendData:iCocosEncode(@"--")];
63         [body appendData:iCocosEncode(iCocosFileBoundary)];
64         [body appendData:iCocosEncode(iCocosNewLien)];
65         
66         NSString *disposition = [NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"", key];
67         [body appendData:iCocosEncode(disposition)];
68         [body appendData:iCocosEncode(iCocosNewLien)];
69         
70         [body appendData:iCocosEncode(iCocosNewLien)];
71         [body appendData:iCocosEncode([obj description])];
72         [body appendData:iCocosEncode(iCocosNewLien)];
73     }];
74     
75     // 3.3.结束标记
76     [body appendData:iCocosEncode(@"--")];
77     [body appendData:iCocosEncode(iCocosFileBoundary)];
78     [body appendData:iCocosEncode(@"--")];
79     [body appendData:iCocosEncode(iCocosNewLien)];
80     
81     request.HTTPBody = body;
82     
83     // 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)
84     NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", iCocosFileBoundary];
85     [request setValue:contentType forHTTPHeaderField:@"Content-Type"];
86     
87     // 5.发送请求
88     [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
89         NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
90         NSLog(@"%@", dict);
91     }];
92 }

二：文件解压

1 - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
2 {
3     NSURL *url = [NSURL URLWithString:@"http://localhost:8080/MJServer/resources/images.zip"];
4     NSURLSessionDownloadTask *task = [[NSURLSession sharedSession] downloadTaskWithURL:url completionHandler:^(NSURL *location, NSURLResponse *response, NSError *error) {
5         NSString *caches = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];
6         [SSZipArchive unzipFileAtPath:location.path toDestination:caches];
7     }];
8     [task resume];
9 }