iOS开发——网络编程OC篇&（八）文件压缩与解压

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 }