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?>