下載地址：https://github.com/samsoffes/ssziparchive
註意：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];
 

Content-Type multipart/form-data; boundary=本次上傳標示字符串(不能中文)

--本次上傳標示字符串 \n
Content-Disposition: form-data; name="服務端字段"; filename="上傳文件名" \n
Content-Type: 上傳文件MIMEType \n\n

要上傳的二進制數據

--本次上傳標示字符串 \n
Content-Disposition: form-data; name="submit" \n\n

Submit \n
--本次上傳標示字符串-- \n

post上傳

//
//  UploadFile.m
//  02.Post上傳


#import "UploadFile.h"

@implementation UploadFile
// 拼接字符串
static NSString *boundaryStr = @"--";   // 分隔字符串
static NSString *randomIDStr;           // 本次上傳標示字符串
static NSString *uploadID;              // 上傳(php)腳本中，接收文件字段

- (instancetype)init
{
    self = [super init];
    if (self) {
        randomIDStr = @"itcast";
        uploadID = @"uploadFile";
    }
    return self;
}

#pragma mark - 私有方法
- (NSString *)topStringWithMimeType:(NSString *)mimeType uploadFile:(NSString *)uploadFile
{
    NSMutableString *strM = [NSMutableString string];
    
    [strM appendFormat:@"%@%@\n", boundaryStr, randomIDStr];
    [strM appendFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\n", uploadID, uploadFile];
    [strM appendFormat:@"Content-Type: %@\n\n", mimeType];
    
    NSLog(@"%@", strM);
    return [strM copy];
}

- (NSString *)bottomString
{
    NSMutableString *strM = [NSMutableString string];
    
    [strM appendFormat:@"%@%@\n", boundaryStr, randomIDStr];
    [strM appendString:@"Content-Disposition: form-data; name=\"submit\"\n\n"];
    [strM appendString:@"Submit\n"];
    [strM appendFormat:@"%@%@--\n", boundaryStr, randomIDStr];
    
    NSLog(@"%@", strM);
    return [strM copy];
}

#pragma mark - 上傳文件
- (void)uploadFileWithURL:(NSURL *)url data:(NSData *)data
{
    // 1> 數據體
    NSString *topStr = [self topStringWithMimeType:@"image/png" uploadFile:@"頭像1.png"];
    NSString *bottomStr = [self bottomString];
    
    NSMutableData *dataM = [NSMutableData data];
    [dataM appendData:[topStr dataUsingEncoding:NSUTF8StringEncoding]];
    [dataM appendData:data];
    [dataM appendData:[bottomStr dataUsingEncoding:NSUTF8StringEncoding]];
    
    // 1. Request
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:0 timeoutInterval:2.0f];
    
    // dataM出了作用域就會被釋放,因此不用copy
    request.HTTPBody = dataM;
    
    // 2> 設置Request的頭屬性
    request.HTTPMethod = @"POST";
    
    // 3> 設置Content-Length
    NSString *strLength = [NSString stringWithFormat:@"%ld", (long)dataM.length];
    [request setValue:strLength forHTTPHeaderField:@"Content-Length"];
    
    // 4> 設置Content-Type
    NSString *strContentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", randomIDStr];
    [request setValue:strContentType forHTTPHeaderField:@"Content-Type"];
    
    // 3> 連接服務器發送請求
    [NSURLConnection sendAsynchronousRequest:request queue:[[NSOperationQueue alloc] init] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
        
        NSString *result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
        NSLog(@"%@", result);
    }];
}



@end

//
//  MJViewController.m
//  02.Post上傳


#import "MJViewController.h"
#import "UploadFile.h"

@interface MJViewController ()

@end

@implementation MJViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    UploadFile *upload = [[UploadFile alloc] init];
    
    NSString *urlString = @"http://localhost/upload.php";
    
    NSString *path = [[NSBundle mainBundle] pathForResource:@"頭像1.png" ofType:nil];
    NSData *data = [NSData dataWithContentsOfFile:path];
    
    [upload uploadFileWithURL:[NSURL URLWithString:urlString] data:data];
}

@end

文件下載

//
//  FileDownload.m
//  01.文件下載
//


#import "FileDownload.h"
#import "NSString+Password.h"

#define kTimeOut        2.0f
// 每次下載的字節數
#define kBytesPerTimes  20250

@interface FileDownload()
@property (nonatomic, strong) NSString *cacheFile;
@property (nonatomic, strong) UIImage *cacheImage;
@end

@implementation FileDownload
/**
 為了保證開發的簡單,所有方法都不使用多線程,所有的註意力都保持在文件下載上
 
 在開發中如果碰到比較繞的計算問題時,建議:
 1> 測試數據不要太大
 2> 測試數據的數值變化,能夠用筆算計算出準確的數值
 3> 編寫代碼對照測試

 */
//- (NSString *)cacheFile
//{
//    if (!_cacheFile) {
//        NSString *cacheDir = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[0];
//        _cacheFile = [cacheDir stringByAppendingPathComponent:@"123.png"];
//    }
//    return _cacheFile;
//}
- (UIImage *)cacheImage
{
    if (!_cacheImage) {
        _cacheImage = [UIImage imageWithContentsOfFile:self.cacheFile];
    }
    return _cacheImage;
}

- (void)setCacheFile:(NSString *)urlStr
{
    NSString *cacheDir = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)[0];
    urlStr = [urlStr MD5];
    
    _cacheFile = [cacheDir stringByAppendingPathComponent:urlStr];
}

- (void)downloadFileWithURL:(NSURL *)url completion:(void (^)(UIImage *image))completion
{
    // GCD中的串行隊列異步方法
    dispatch_queue_t q = dispatch_queue_create("cn.itcast.download", DISPATCH_QUEUE_SERIAL);
    
    dispatch_async(q, ^{
        NSLog(@"%@", [NSThread currentThread]);
        
        // 把對URL進行MD5加密之後的結果當成文件名
        self.cacheFile = [url absoluteString];
        
        // 1. 從網絡下載文件,需要知道這個文件的大小
        long long fileSize = [self fileSizeWithURL:url];
        // 計算本地緩存文件大小
        long long cacheFileSize = [self localFileSize];
        
        if (cacheFileSize == fileSize) {
            dispatch_async(dispatch_get_main_queue(), ^{
                completion(self.cacheImage);
            });
            NSLog(@"文件已經存在");
            return;
        }
        
        // 2. 確定每個數據包的大小
        long long fromB = 0;
        long long toB = 0;
        // 計算起始和結束的字節數
        while (fileSize > kBytesPerTimes) {
            // 20480 + 20480
            //
            toB = fromB + kBytesPerTimes - 1;
            
            // 3. 分段下載文件
            [self downloadDataWithURL:url fromB:fromB toB:toB];
            
            fileSize -= kBytesPerTimes;
            fromB += kBytesPerTimes;
        }
        [self downloadDataWithURL:url fromB:fromB toB:fromB + fileSize - 1];

        dispatch_async(dispatch_get_main_queue(), ^{
            completion(self.cacheImage);
        });        
    });
}

#pragma mark 下載指定字節範圍的數據包
/**
 NSURLRequestUseProtocolCachePolicy = 0,        // 默認的緩存策略,內存緩存
 
 NSURLRequestReloadIgnoringLocalCacheData = 1,  // 忽略本地的內存緩存
 NSURLRequestReloadIgnoringCacheData
 */
- (void)downloadDataWithURL:(NSURL *)url fromB:(long long)fromB toB:(long long)toB
{
    NSLog(@"數據包:%@", [NSThread currentThread]);
    
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:kTimeOut];
    
    // 指定請求中所要GET的字節範圍
    NSString *range = [NSString stringWithFormat:@"Bytes=%lld-%lld", fromB, toB];
    [request setValue:range forHTTPHeaderField:@"Range"];
    NSLog(@"%@", range);
    
    NSURLResponse *response = nil;
    NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:NULL];
    
    // 寫入文件,覆蓋文件不會追加
//    [data writeToFile:@"/Users/aplle/Desktop/1.png" atomically:YES];
    [self appendData:data];
    
    NSLog(@"%@", response);
}

#pragma mark - 讀取本地緩存文件大小
- (long long)localFileSize
{
    // 讀取本地文件信息
    NSDictionary *dict = [[NSFileManager defaultManager] attributesOfItemAtPath:self.cacheFile error:NULL];
    NSLog(@"%lld", [dict[NSFileSize] longLongValue]);
    
    return [dict[NSFileSize] longLongValue];
}

#pragma mark - 追加數據到文件
- (void)appendData:(NSData *)data
{
    // 判斷文件是否存在
    NSFileHandle *fp = [NSFileHandle fileHandleForWritingAtPath:self.cacheFile];
    // 如果文件不存在創建文件
    if (!fp) {
        [data writeToFile:self.cacheFile atomically:YES];
    } else {
        // 如果文件已經存在追加文件
        // 1> 移動到文件末尾
        [fp seekToEndOfFile];
        // 2> 追加數據
        [fp writeData:data];
        // 3> 寫入文件
        [fp closeFile];
    }
}

#pragma mark - 獲取網絡文件大小
- (long long)fileSizeWithURL:(NSURL *)url
{
    // 默認是GET
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:0 timeoutInterval:kTimeOut];
    
    // HEAD 頭,只是返回文件資源的信息,不返回具體是數據
    // 如果要獲取資源的MIMEType,也必須用HEAD,否則,數據會被重復下載兩次
    request.HTTPMethod = @"HEAD";

    // 使用同步方法獲取文件大小
    NSURLResponse *response = nil;
    
    [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:NULL];
    
    // expectedContentLength文件在網絡上的大小
    NSLog(@"%lld", response.expectedContentLength);
    
    return response.expectedContentLength;
}

@end

//
//  MJViewController.m
//  01.文件下載
//
//  Created by apple on 14-4-29.
//  Copyright (c) 2014年 itcast. All rights reserved.
//

#import "MJViewController.h"
#import "FileDownload.h"

@interface MJViewController ()
@property (nonatomic, strong) FileDownload *download;
@property (weak, nonatomic) IBOutlet UIImageView *imageView;
@end

@implementation MJViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    self.download = [[FileDownload alloc] init];
    [self.download downloadFileWithURL:[NSURL URLWithString:@"http://localhost/itcast/images/head4.png"] completion:^(UIImage *image) {
        
        self.imageView.image = image;
    }];
}

@end

Post Json解析數據

//
//  MJViewController.m
//  03.Post JSON
//


#import "MJViewController.h"
#import "Person.h"

@interface MJViewController ()

@end

@implementation MJViewController
/**
 序列化:   將字典或數組變成順序(序列的)二進制數據流,以便於網絡傳輸
 反序列化:  將從網絡接收到的二進制數據流,轉換成數據和字典的過程
 */
- (void)viewDidLoad
{
    [super viewDidLoad];

    [self postObj];
}

- (void)postObj
{
    // 1. URL
    NSURL *url = [NSURL URLWithString:@"http://localhost/postjson.php"];
    
    // 2. Request
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:0 timeoutInterval:2.0f];
    request.HTTPMethod = @"POST";
    
    Person *p = [[Person alloc] init];
    p.name = @"zhang";
    p.age = 19;

    // KVC給對象賦值
//    p setValuesForKeysWithDictionary:<#(NSDictionary *)#>
    // 使用KVC把對象變成字典
    // 需要指定對象的屬性的鍵值數組
    // 數組中指定的鍵值,必須是對象的屬性
    // 錯誤示例1
//    id obj = [p dictionaryWithValuesForKeys:@[@"name", @"age1"]];
    // 鍵值數組中,不一定要包含全部的屬性
    id obj = [p dictionaryWithValuesForKeys:@[@"name"]];
//    id obj = [p dictionaryWithValuesForKeys:@[@"name", @"age"]];
    
    // 提示dataWithJSONObject只能對NSDictionary和NSArray進行序列化
    request.HTTPBody = [NSJSONSerialization dataWithJSONObject:obj options:0 error:NULL];
    
    // 3. Connection
    [NSURLConnection sendAsynchronousRequest:request queue:[[NSOperationQueue alloc]init] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
        
        NSString *result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
        
        NSLog(@"%@", result);
    }];
}

- (void)postJSON
{
    // 1. URL
    NSURL *url = [NSURL URLWithString:@"http://localhost/postjson.php"];
    
    // 2. Request
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:0 timeoutInterval:2.0f];
    request.HTTPMethod = @"POST";
    
    // 在iOS中JSON就是Dict/Array
    // 使用NSDictionary & NSArray可以各種靈活組合
    NSDictionary *dict = @{
                           @"name": @"zhangsan",
                           @"age" : @18,
                           @"book" : @[
                                   @"iOS 1",
                                   @"iOS 2"
                                   ],
                           @"zoom" : @1
                           };
    NSDictionary *dict1 = @{
                           @"name": @"lisi",
                           @"age" : @24,
                           @"book" : @[
                                   @"iOS 7",
                                   @"iOS 6"
                                   ],
                           @"zoom" : @2
                           };
    NSArray *array = @[dict, dict1];
    
    // 把字典轉換成二進制數據流, 序列化
    request.HTTPBody = [NSJSONSerialization dataWithJSONObject:array options:0 error:NULL];
    
    // 將data轉換成NSDictionary 反序列化
//    [NSJSONSerialization JSONObjectWithData:<#(NSData *)#> options:<#(NSJSONReadingOptions)#> error:<#(NSError *__autoreleasing *)#>]
    
    // 3. Connection
    [NSURLConnection sendAsynchronousRequest:request queue:[[NSOperationQueue alloc]init] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
       
        NSString *result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
        
        NSLog(@"%@", result);
    }];
    
}

@end

URLSessin文件上傳

//
//  MJViewController.m
//  04.URLSessin Upload
//


#import "MJViewController.h"

@interface MJViewController ()

@end

@implementation MJViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    [self uploadFile];
}

#pragma mark - 用Session上傳頭像
- (void)uploadFile
{
    // 1. NSURL
    NSString *urlString = @"http://localhost/uploads/測試一下.png";
    urlString = [urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
    NSURL *url = [NSURL URLWithString:urlString];
//    NSURL *url = [NSURL URLWithString:@"http://localhost/uploads/測試一下.png"];
    
    // 2. Request
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:0 timeoutInterval:2.0];
    
    request.HTTPMethod = @"PUT";
    
    // 設置用戶授權
    // 1> "admin:123456"
    NSString *authStr = @"admin:123456";
    // 2> result = 對字符串進行BASE64編碼(網絡傳輸中常用的一種編碼格式,NSData)
    NSData *authData = [authStr dataUsingEncoding:NSUTF8StringEncoding];
    NSString *result = [authData base64EncodedStringWithOptions:0];
    // 3> "Basic result" => 提交給服務器的驗證字符串,用來驗證身份
    NSString *authString = [NSString stringWithFormat:@"Basic %@", result];
    
    // 設置HTTP請求頭的數值,設置用戶授權
    [request setValue:authString forHTTPHeaderField:@"Authorization"];
    
    // 3. Session,有一個單例,是全局共享的
    NSURLSession *session = [NSURLSession sharedSession];
    
    // 4. 文件上傳
    NSURL *bundleURL = [[NSBundle mainBundle] URLForResource:@"頭像1.png" withExtension:nil];
    // 所有任務默認都是掛起的
    NSURLSessionUploadTask *task = [session uploadTaskWithRequest:request fromFile:bundleURL completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
        
        // 上傳完成操作
        NSLog(@"%@", response);
    }];
    
    [task resume];
}

@end

IOS 上傳下載