iOS上传图像到服务器，以及服务器PHP接收的几种方法

// iOS(Swift)func upload(image: UIImage, url: String) {    let imageData = UIImageJPEGRepresentation(image, 0.3) // 将图片转换成jpeg格式的NSData，压缩到0.3    let imageStr = imageData?.base64EncodedStringWithOptions(.Encoding64CharacterLineLength) // 将图片转换为base64字符串    let params: NSDictionary = ["file": imageStr!]    let manager = AFHTTPRequestOperationManager()    // 采用POST的方式上传，因为POST对长度没有限制    manager.POST(url, parameters: params, success: { (_: AFHTTPRequestOperation!, response: AnyObject!) in        // 成功    }) { (_: AFHTTPRequestOperation!, _: NSError!) in        // 失败    }}

<?phpheader('Content-type: text/json; charset=UTF-8');$base64 = $_POST["file"]; // 得到参数$img = base64_decode($base64); // 将格式为base64的字符串解码$path = "md5(uniqid(rand()))".".jpg"; // 产生随机唯一的名字作为文件名file_put_contents($path, $img); // 将图片保存到相应位置?>

static func uploadPortrait(image: UIImage, url: String) {    let manager = AFHTTPRequestOperationManager()    // fromData: AFN封装好的http header类，可以添加请求体    manager.POST(url, parameters: [:], constructingBodyWithBlock: { (fromData: AFMultipartFormData!) in        let pngData = UIImagePNGRepresentation(image)        // name必须和后台PHP接收的参数名相同($_FILES["file"])        // fileName为图片名        fromData.appendPartWithFileData(pngData, name: "file", fileName: "image.png", mimeType: "image/png")              // let jpegData = UIImageJPEGRepresentation(image, 0.3)        // fromData.appendPartWithFileData(jpegData, name: "file", fileName: "image.jpg", mimeType: "image/jpeg")    }, success: { (operation: AFHTTPRequestOperation!, response: AnyObject!) in        // 成功    }) { (operation: AFHTTPRequestOperation!, error: NSError!) in        // 失败    }   }

<?phpheader('Content-type: text/json; charset=UTF-8' );/** * $_FILES 文件上传变量，是一个二维数组，第一维保存上传的文件的数组，第二维保存文件的属性，包括类型、大小等 * 要实现上传文件，必须修改权限为加入可写 chmod -R 777 目标目录 */// 文件类型限制// "file"名字必须和iOS客户端上传的name一致if (($_FILES["file"]["type"] == "image/gif")|| ($_FILES["file"]["type"] == "image/jpeg")|| ($_FILES["file"]["type"] == "image/png")|| ($_FILES["file"]["type"] == "image/pjpeg"))// && ($_FILES["file"]["size"] < 20000)) // 小于20k{    if ($_FILES["file"]["error"] > 0) {        echo $_FILES["file"]["error"]; // 错误代码    } else {                   $fillname = $_FILES['file']['name']; // 得到文件全名        $dotArray = explode('.', $fillname); // 以.分割字符串，得到数组        $type = end($dotArray); // 得到最后一个元素：文件后缀        $path = "../portrait/".md5(uniqid(rand())).'.'.$type; // 产生随机唯一的名字        move_uploaded_file( // 从临时目录复制到目标目录          $_FILES["file"]["tmp_name"], // 存储在服务器的文件的临时副本的名称          $path);        echo "成功";    } } else {    echo "文件类型不正确";}?>

// 使用OC封装#import <UIKit/UIKit.h>@interface RequestPostUploadHelper : NSObject+ (NSMutableURLRequest *)uploadImage:(NSString*)url uploadImage:(UIImage *)uploadImage params:(NSMutableDictionary *)params;@end#import "RequestPostUploadHelper.h"@implementation RequestPostUploadHelper+ (NSMutableURLRequest *)uploadImage:(NSString*)url uploadImage:(UIImage *)uploadImage params:(NSMutableDictionary *)params {    [params setObject:uploadImage forKey:@"file"];    //分界线的标识符    NSString *TWITTERFON_FORM_BOUNDARY = @"AaB03x";    //根据url初始化request    NSMutableURLRequest* request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:url]                                                           cachePolicy:NSURLRequestReloadIgnoringLocalCacheData                                                       timeoutInterval:10];    //分界线 --AaB03x    NSString *MPboundary=[[NSString alloc]initWithFormat:@"--%@",TWITTERFON_FORM_BOUNDARY];    //结束符 AaB03x--    NSString *endMPboundary=[[NSString alloc]initWithFormat:@"%@--",MPboundary];    //要上传的图片    UIImage *image=[params objectForKey:@"file"];    //得到图片的data    NSData* data = UIImagePNGRepresentation(image);    //http body的字符串    NSMutableString *body=[[NSMutableString alloc]init];    //参数的集合的所有key的集合    NSArray *keys= [params allKeys];    //遍历keys    for(int i = 0; i < [keys count]; i++)    {        //得到当前key        NSString *key = [keys objectAtIndex:i];        //如果key不是file，说明value是字符类型，比如name：Boris        if(![key isEqualToString:@"file"])        {            //添加分界线，换行            [body appendFormat:@"%@\r\n",MPboundary];            //添加字段名称，换2行            [body appendFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n",key];            //添加字段的值            [body appendFormat:@"%@\r\n",[params objectForKey:key]];        }    }    ////添加分界线，换行    [body appendFormat:@"%@\r\n",MPboundary];    //声明file字段，文件名为image.png    [body appendFormat:@"Content-Disposition: form-data; name=\"file\"; filename=\"image.png\"\r\n"];    //声明上传文件的格式    [body appendFormat:@"Content-Type: image/png\r\n\r\n"];    //声明结束符：--AaB03x--    NSString *end=[[NSString alloc] initWithFormat:@"\r\n%@",endMPboundary];    //声明myRequestData，用来放入http body    NSMutableData *myRequestData = [NSMutableData data];    //将body字符串转化为UTF8格式的二进制    [myRequestData appendData:[body dataUsingEncoding:NSUTF8StringEncoding]];    //将image的data加入    [myRequestData appendData:data];    //加入结束符--AaB03x--    [myRequestData appendData:[end dataUsingEncoding:NSUTF8StringEncoding]];    //设置HTTPHeader中Content-Type的值    NSString *content=[[NSString alloc]initWithFormat:@"multipart/form-data; boundary=%@",TWITTERFON_FORM_BOUNDARY];    //设置HTTPHeader    [request setValue:content forHTTPHeaderField:@"Content-Type"];    //设置Content-Length    [request setValue:[NSString stringWithFormat:@"%d", [myRequestData length]] forHTTPHeaderField:@"Content-Length"];    //设置http body    [request setHTTPBody:myRequestData];    //http method    [request setHTTPMethod:@"POST"];    return request;}@end

// 使用// Swiftstatic func uploadPortrait(image: UIImage, url:String) {    // 使用    let request = RequestPostUploadHelper.uploadImage(url, uploadImage: image, params: [:])    // 异步网络请求    NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue()) { (response: NSURLResponse?, data: NSData?, error: NSError?) in        if error != nil {            // 失败        } else {            // 成功        }    }}

<?php// PHP代码和上一步相同?>