[iOS AFNetworking框架实现HTTP请求、多文件图片上传下载]

简单的JSON的HTTP传输就不说了,看一个简单的DEMO吧。

主要明白parameters是所填参数,类型是字典型。我把这部分代码封装起来了,以便多次调用。也许写在一起更清楚点。

#pragma mark - JSON方式post提交数据
- (void)postJSONWithUrl:(NSString *)urlStr parameters:(id)parameters success:(void (^)(id responseObject))success fail:(void (^)())fail
{
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    // 设置请求格式
    manager.requestSerializer = [AFJSONRequestSerializer serializer];
    // 设置返回格式
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];
    [manager POST:urlStr parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) {
        //查看返回数据
        //NSString *result = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
        if (success) {
            success(responseObject);
        }
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"%@", error);
        if (fail) {
            fail();
        }
    }];
}

下面是调用方式:返回的json会存在id的变量里,这个jsondataAFN框架有自动转换成字典型,用健直接可以取到值。

//jason解析,根据上传id从数据库取出用户信息
-(void)jasontest{
    //访问的URL
    NSString *url = @"http://localhost:8888/chepaishibie/selectuser.php";
    //需要传进去的参数
    NSDictionary *parameter = @{@"Driverid": @"10000"};
    //GET或者POST请求
    [[ShenAFN sharedInstance] JSONDataWithUrl:url parameter:parameter success:^(id jsondata) {
        //返回的字符,并输出
        NSLog(@"success:\n%@", jsondata);
        //如果是其他字符,可以用以下语句解析返回的语句
        //NSString *result = [[NSString alloc] initWithData:jsondata encoding:NSUTF8StringEncoding];
        //如果是json格式,可以通过这种方式获取变量
        id info1=jsondata[@"info1"];
        _personname=info1[@"personname"];
    } fail:^{
        NSLog(@"请求失败");
    }];
}

 

网上实现多图片的上传的教程几乎没,所以在这里特别说下。方便别人学习。

首先看下浏览器端的上传实现:http://www.w3school.com.cn/php/php_file_upload.asp

一般情况下for表单都是默认键值对传输的,当表单类型设置为enctype="multipart/form-data"时,传输会按照二进制传输。

PHP后台和W3C教程基本一样,我稍微改了下,用foreach就能实现动态的单个文件上传或者多个文件上传了。

说明一下,上传文件都放在$_FILES的数组里,获取方式$_FILES["file0"]或者$_FILES["file1"],这个file0就是再下面iOS工程里定义的name。

PHP后台代码如下:

<?    
    header("Content-type: text/html; charset=UTF-8");
    include("../configmysql.php");
    mysql_select_db("chepaiDB",$q); //数据库  

    //POST获取键值对参数
    $TEMPid=$_POST['Driverid'];
    echo "\nDriverid is ".$TEMPid."\n";

    foreach ($_FILES as $_eachFile) {
        //file文件处理
        if ($_eachFile["error"] > 0)
          {
          echo "错误: " . $_eachFile["error"] . "\n";
          }
        else
          {
          echo "文件名: " . $_eachFile["name"] . "\n";
          echo "类型: " . $_eachFile["type"] . "\n";
          echo "大小: " . ($_eachFile["size"] / 1024) . " Kb\n"; 
          }
         if (file_exists("uploadimage/" . $_eachFile["name"]))
            {
              echo $_eachFile["name"] . " 文件已经存在. ";
            }
        else
            {
              move_uploaded_file($_eachFile["tmp_name"],
              "uploadimage/" . $_eachFile["name"]);
              echo "文件已经被存储到: " . "uploadimage/" . $_eachFile["name"]."\n";
            }
    }
    /*
    //file文件处理
    if ($_FILES["file"]["error"] > 0)
      {
      echo "错误: " . $_FILES["file"]["error"] . "\n";
      }
    else
      {
      echo "文件名: " . $_FILES["file"]["name"] . "\n";
      echo "类型: " . $_FILES["file"]["type"] . "\n";
      echo "大小: " . ($_FILES["file"]["size"] / 1024) . " Kb\n"; 
      }
     if (file_exists("uploadimage/" . $_FILES["file"]["name"]))
        {
          echo $_FILES["file"]["name"] . " 文件已经存在. ";
        }
    else
        {
          move_uploaded_file($_FILES["file"]["tmp_name"],
          "uploadimage/" . $_FILES["file"]["name"]);
          echo "文件已经被存储到: " . "uploadimage/" . $_FILES["file"]["name"]."\n";
        }
    */
?>

在AFN框架里,FORMDATA的体现,就是[manager POST:urlStr parameters:parameter constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {}这个函数是专门用于formData上传的,还可携带其他参数。

单图上传:

#pragma mark - 单个图片上传
- (void)uploadimgWithurl:(NSString *)urlStr image:(UIImage *)image fileName:(NSString *)fileName success:(void (^)(id responseObject))success fail:(void (^)())fail
{
    //需要传递的参数,jason格式
    NSDictionary *parameter = @{@"Driverid": @"10000"};
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];
    [manager POST:urlStr parameters:parameter constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        /*文件命名参考代码
         // 在网络开发中,上传文件时,是文件不允许被覆盖,文件重名
         // 要解决此问题,
         // 可以在上传时使用当前的系统事件作为文件名
         NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
         // 设置时间格式
         formatter.dateFormat = @"yyyyMMddHHmmss";
         NSString *str = [formatter stringFromDate:[NSDate date]];
         NSString *newfileName = [NSString stringWithFormat:@"%@.png", str];
         */
        [formData appendPartWithFileData:UIImagePNGRepresentation(image) name:@"file" fileName:fileName mimeType:@"image/png"];
    } success:^(AFHTTPRequestOperation *operation, id responseObject) {
        if (success) {
            //NSLog(@"success\n");
            success(responseObject);
        }
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        if (fail) {
            //NSLog(@"fail\n");
            fail();
        }
    }];
}

调用:

//单图片上传
-(void)uploadimg{
    NSString *url = @"http://localhost:8888/chepaishibie/uploadimage.php";
    UIImage *image=[UIImage imageNamed:@"swift"];
    [[ShenAFN sharedInstance] uploadimgWithurl:url image:image fileName:@"myswift.png" success:^(id jsondata) {
        NSString *result = [[NSString alloc] initWithData:jsondata encoding:NSUTF8StringEncoding];
        NSLog(@"%@", result);
    } fail:^{
        NSLog(@"请求失败");
    }];
}

 

多图片上传:主要是利用appendPartWithFileData函数,一个for循环把NSMutablearray里的图片都添加进去。

- (void)uploadMutableimgWithurl:(NSString *)urlStr imagearray:(NSMutableArray *)imgarray success:(void (^)(id responseObject))success fail:(void (^)())fail
{
    //需要传递的参数,jason格式
    NSDictionary *parameter = @{@"Driverid": @"10000"};
    
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];
    [manager POST:urlStr parameters:parameter constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        /*文件命名参考代码
         // 在网络开发中,上传文件时,是文件不允许被覆盖,文件重名
         // 要解决此问题,
         // 可以在上传时使用当前的系统事件作为文件名
         NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
         // 设置时间格式
         formatter.dateFormat = @"yyyyMMddHHmmss";
         NSString *str = [formatter stringFromDate:[NSDate date]];
         NSString *newfileName = [NSString stringWithFormat:@"%@.png", str];
         */
        for (int i=0; i<[imgarray count]; i++) {
            [formData appendPartWithFileData:UIImagePNGRepresentation([imgarray objectAtIndex:i]) name:[NSString stringWithFormat:@"file%d",i ] fileName:[NSString stringWithFormat:@"pic%d.png",i] mimeType:@"image/png"];
        }
    } success:^(AFHTTPRequestOperation *operation, id responseObject) {
        if (success) {
            //NSLog(@"success\n");
            success(responseObject);
        }
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        if (fail) {
            //NSLog(@"fail\n");
            fail();
        }
    }];
}

调用:

//多图片上传
-(void)uploadmutableimg{
    NSString *url = @"http://localhost:8888/chepaishibie/uploadimage.php";
    UIImage *image1=[UIImage imageNamed:@"0"];
    UIImage *image2=[UIImage imageNamed:@"1"];
    NSMutableArray *imgarray=[[NSMutableArray alloc]init];
    [imgarray addObject:image1];
    [imgarray addObject:image2];
    
    [[ShenAFN sharedInstance] uploadMutableimgWithurl:url imagearray:imgarray success:^(id jsondata) {
        NSString *result = [[NSString alloc] initWithData:jsondata encoding:NSUTF8StringEncoding];
        NSLog(@"%@", result);
    } fail:^{
        NSLog(@"请求失败");
    }];
}

 

另外JPEG的图片压缩可以用:

UIImageJPEGRepresentation(image,0.5);

 

GITHUB:   https://github.com/rayshen/AFNDemo

 

posted @ 2015-06-27 16:21  Rayshen  阅读(3884)  评论(0编辑  收藏  举报