关于AFNetworking框架的使用

本人对于AFNetworking理解为利用HTTP协议与服务器互联，本次用AFHTTP往服务器传文件，并解析服务器传回来的json，

首先：在工程里导入AFNetworking框架，

并在需要传文件的类里导入头文件：

#import "AFNetworking.h"

#import "AFHTTPRequestOperation.h"

#import "AFHTTPClient.h"

往服务器传一张图片：

事例：

//将图片转化为NSData类型

NSData *imageData;/

if (image) {

imageData = UIImageJPEGRepresentation(image,0.5);

}

    // NSMutableDictionary * postdata = [[NSMutableDictionary alloc] init];

    //    [postdata setObject:nil forKey:@"photoUser"];

 

//上传服务器的地址   

NSString * newURL =@"http://mobile.inankai.cn";

//上传图片的接口

NSMutableURLRequest *request = [[AFHTTPClientclientWithBaseURL:[NSURLURLWithString:newURL]] multipartFormRequestWithMethod:@"POST"

//本篇利用POST方法上传图片

path:@"/file/sid/updateUserPhoto/flagTemp/0/"parameters:nilconstructingBodyWithBlock: ^(id <AFMultipartFormData>formData) {

//往URL里添加图片（NSData）

[formData appendPartWithFileData:imageDataname:@"photoUser"fileName:@"nothing.jpg"mimeType:@"image/jpeg"]; //图片

}];

AFHTTPRequestOperation *operation = [[AFHTTPRequestOperationalloc] initWithRequest:request];

[operation setUploadProgressBlock:^(NSUInteger bytesWritten,long long totalBytesWritten, long long totalBytesExpectedToWrite) {

float progress = totalBytesWritten / (float)totalBytesExpectedToWrite;

NSLog(@"Sent %f ..",progress);

    }];

//开始上传图片

[operation start];

//上传成功时调用

[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation,id responseObject) {

//在这里最好打印json，看json 的格式

NSLog(@" imageRequestDidFinish:  %@ ",[operationresponseString]);

response =[operationresponseString];

//对json 进行解析

        NSError *error = nil;

        NSData *fileIdData = [responsedataUsingEncoding:NSUTF8StringEncoding];

         NSDictionary *dic = [NSJSONSerializationJSONObjectWithData:fileIdData options:NSJSONReadingMutableLeaveserror:&error];

       // NSDictionary *dict = [NKNetwork parseDataFromJSON:responseObject];

        NSDictionary *dictfil = [dic objectForKey:@"json"];

        NSArray* Info =[dictfil objectForKey:@"data"];

        NSDictionary * dicfile = [Info objectAtIndex:0];

//解析出来需要上传的fileId

        fileIdStr = [dicfile objectForKey:@"fileId"];

        NSLog(@"#####resopnse: %@",response);

//上传服务器需要的值

        [self updatefileId];

    } failure:^(AFHTTPRequestOperation *operation,NSError *error) {

NSLog(@"error: %@",  operation.responseString);

}];

-(void)updatefileId

{

    NSLog(@"fileIdStr:%@",fileIdStr);

//这里我们上传数据采用的时get 方法

//上传服务器所需要的fileID

    NSURLRequest *URLRequest = [NSURLRequestrequestWithURL:[NSURL URLWithString:[NKNetwork updateUserPhotoWithFileId:fileIdStr]]];

    AFJSONRequestOperation *operation = [AFJSONRequestOperationJSONRequestOperationWithRequest:URLRequest success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {

//打印json

        [NKTools logJSON:JSON];

    } failure:^(NSURLRequest *request,NSHTTPURLResponse *response, NSError *error,id JSON) {

        [NKTools logJSON:JSON];

    }];

    [operation start];

}