File Upload Download For iOS

本文内容来自于王志刚 《软件创富密码：iPhone应用程序开发攻略之深入浅出Objective-C 2.0》一书，修改了部分内容。

截图如下：

Download：

代码如下：

////  AppController.h//  File Upload Download////  Created by longx-app on 13-9-15.//  Copyright (c) 2013年 longx-app. All rights reserved.//#import <Foundation/Foundation.h>@interface AppController : NSObject <NSURLConnectionDataDelegate>{    NSMutableData *m_data;  // 图片数据    BOOL m_is_upload;       // 上传标志    NSString *action_type;   // 操作类型    NSMutableData *m_result; // 返回数据}@property (strong, nonatomic) IBOutlet UIImageView *imageView;- (IBAction)upload:(id)sender;- (IBAction)download:(id)sender;@end

 

////  AppController.m//  File Upload Download////  Created by longx-app on 13-9-15.//  Copyright (c) 2013年 longx-app. All rights reserved.//#import "AppController.h"@implementation AppController@synthesize imageView=_imageView;- (id)init{    if (self = [super init]) { // equivalent to "self does not equal nil"        m_is_upload = TRUE;    }    return self;}- (IBAction)upload:(id)sender{    action_type = @"UPLOAD";        if (m_data == nil) {        return;    }    // 上传的情况下    if (m_is_upload) {        m_is_upload = FALSE;        //m_data = [[NSMutableData data] retain];        m_result = [[NSMutableData data] retain];                NSData *pData = UIImagePNGRepresentation([_imageView image]);        [self uploadPictureProcess:pData];        return;    }        return;}- (IBAction)download:(id)sender{    action_type = @"DOWNLOAD";        m_data = [[NSMutableData data] retain];    // 请求    NSString *url = @"http://coolapp-image.stor.sinaapp.com/orginal.png";    NSMutableURLRequest *req = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:url] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:30.0];    NSURLConnection *con = [[NSURLConnection alloc] initWithRequest:req delegate:self];    if (con == NULL) {        return;    }}- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{    if ([action_type isEqualToString:@"DOWNLOAD"]) {        // 追加接收的数据        [m_data appendData:data];    }    else if ([action_type isEqualToString:@"UPLOAD"])    {        // 追加数据        [m_result appendData:data];    }}// 结束网络连接- (void)connectionDidFinishLoading:(NSURLConnection *)connection{        if ([action_type isEqualToString:@"DOWNLOAD"])    {        UIImage *img = [[UIImage alloc] initWithData:m_data];        [_imageView setImage:img];    }    else if ([action_type isEqualToString:@"UPLOAD"])    {        NSLog(@"Upload finish!!");        m_is_upload = TRUE;        // 打印结果        NSMutableString *result = [[NSMutableString alloc] initWithData:m_result encoding:NSUTF8StringEncoding];        NSLog(@"%@", [NSString stringWithString:result]);        m_result = nil;    }}// 上传图片- (void)uploadPictureProcess:(NSData*)imgData {    //UIApplication *app = [UIApplication sharedApplication];    // 初始化    // 连接设置，创建request对象    NSString *url = @"http://1.coolapp.sinaapp.com/uploadpicture.php";    NSMutableURLRequest *req = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:url] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:30.0];    // 进行HTTP头设置，首先设置主机，接着设置用户代理、语言和文字编码等。中文环境下必须GB2312或者UTF-8    [req addValue:[NSString stringWithFormat:@"1.coolapp.sinaapp.com"] forHTTPHeaderField:@"Host"];    [req addValue:[NSString stringWithFormat:@"Mozilla/5.0 (iPod; U; CPU iPhone OS 4_3 like Mac OS X; zh-Hans)"] forHTTPHeaderField:@"User-Agent"];    [req addValue:[NSString stringWithFormat:@"text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"] forHTTPHeaderField:@"Accept"];    [req addValue:[NSString stringWithFormat:@"zh,en-us;q=0.7,en;q=0.3"] forHTTPHeaderField:@"Accept-Language"];    [req addValue:[NSString stringWithFormat:@"gzip,deflate"] forHTTPHeaderField:@"Accept-Encoding"];    [req addValue:[NSString stringWithFormat:@"gb2312,utf-8;q=0.7,*;q=0.7"] forHTTPHeaderField:@"Accept-Charset"];    [req addValue:[NSString stringWithFormat:@"300"] forHTTPHeaderField:@"Keep-Alive"];    [req addValue:[NSString stringWithFormat:@"keep-alive"] forHTTPHeaderField:@"Connection"];    [req addValue:[NSString stringWithFormat:@"max-age=0"] forHTTPHeaderField:@"Cache-Control"];        // 将HTTP方法设置POST    [req setHTTPMethod:@"POST"];        // 设置内容类型，注意必须是“multipart/form-data; boundary=XX”与form表单中上传文件的设置一样。    NSString    *boundary = [NSString stringWithFormat:@"---------------------------12345678912345678912345678912"];    NSString    *content_type = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];    [req addValue:content_type forHTTPHeaderField:@"Content-Type"];        // 主体（Body）    NSMutableData *body = [[NSMutableData data] retain];    // 注意中文环境中必须使用NSUTF8StringEncoding    [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"up\"; filename=\"test.png\"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];    //将主体（body）的内容类型设置为“image/png”，如果是JPEG图片则为“image/jpeg”。    [body appendData:[[NSString stringWithFormat:@"Content-Type: image/png\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];    //追加图片数据    [body appendData:imgData];    [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];    [req setHTTPBody:body];        // 服务器连接开始    NSURLConnection *con = [[NSURLConnection alloc] initWithRequest:req delegate:self];    if(con == NULL){        return;    }}@end

 

PHP服务器端代码如下：

因为服务器使用新浪云服务器，所以有些api不一样：

<?php// 保存接收图片// var_dump($_FILES['up']['tmp_name']);if ($_FILES['up']['tmp_name']) {    file_put_contents( SAE_TMP_PATH . '/test.png' , file_get_contents($_FILES['up']['tmp_name']) );        $s = new SaeStorage();    $s->upload( 'image' , 'remote_test_file.png' , SAE_TMP_PATH . '/test.png' );    echo "OK";} else {    echo "NG";}//file_put_contents( SAE_TMP_PATH . '/mycode.txt' , 'dummy test' );//echo file_get_contents( SAE_TMP_PATH . '/mycode.txt' ); // will echo dummy test;////$s = new SaeStorage();//$s->upload( 'resources' , 'remote_file.txt' , SAE_TMP_PATH . '/mycode.txt' );?>

 

完