POST上传文件之分类抽取——以后只需要把分类导入，使用NSMutableURLRequest的分类即可

来源：互联网发布：python 3.6.0下载安装编辑：程序博客网时间：2024/06/06 08:26

每次上传文件拼接数据都很麻烦，为了解决这个问题。我们可以为NSMutableURLRequest抽取一个分类如下所示：

NSMutableURLRequest+Multipart.h

////  NSMutableURLRequest+Multipart.h//  06-POST上传////  Created by apple on 15/1/20.//  Copyright (c) 2015年 apple. All rights reserved.//#import <UIKit/UIKit.h>@interface NSMutableURLRequest (Multipart)/** url: 要上传的服务器的地址 loaclFilePath: 要上传的文件的全路径 fileName：保存到服务器的文件名 */+ (instancetype)requestWithURL:(NSURL *)url andLoaclFilePath:(NSString *)loaclFilePath andFileName:(NSString *)fileName;@end

NSMutableURLRequest+Multipart.m

////  NSMutableURLRequest+Multipart.m//  06-POST上传////  Created by apple on 15/1/20.//  Copyright (c) 2015年 apple. All rights reserved.//#import "NSMutableURLRequest+Multipart.h"/**随便的字符串作为分隔符*/static NSString *boundary = @"itcastupload";@implementation NSMutableURLRequest (Multipart)+ (instancetype)requestWithURL:(NSURL *)url andLoaclFilePath:(NSString *)loaclFilePath andFileName:(NSString *)fileName{    // 2. post请求    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:1 timeoutInterval:2.0f];    // 2.1 指定post方法    request.HTTPMethod = @"POST";        // 2.2 拼接数据体    NSMutableData *dataM = [NSMutableData data];        //   1. \r\n--(可以随便写, 但是不能有中文)\r\n    NSString *str = [NSString stringWithFormat:@"\r\n--%@\r\n", boundary];    [dataM appendData:[str dataUsingEncoding:NSUTF8StringEncoding]];            //   2. Content-Disposition: form-data; name="userfile(php脚本中用来读取文件的字段)"; filename="demo.json(要保存到服务器的文件名)"        str = [NSString stringWithFormat:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"%@\" \r\n", fileName];        [dataM appendData:[str dataUsingEncoding:NSUTF8StringEncoding]];            //   3. Content-Type: application/octet-stream(上传文件的类型)\r\n\r\n    str = @"Content-Type: application/octet-stream\r\n\r\n";    [dataM appendData:[str dataUsingEncoding:NSUTF8StringEncoding]];            //   4. 要上传的文件的二进制流    // 要上传图片的二进制    [dataM appendData:[NSData dataWithContentsOfFile:loaclFilePath]];        //   5. \r\n--(可以随便写, 但是不能有中文)--\r\n    str = [NSString stringWithFormat:@"\r\n--%@--\r\n", boundary];    [dataM appendData:[str dataUsingEncoding:NSUTF8StringEncoding]];        // 2.4 设置请求体    request.HTTPBody = dataM;        // 设置请求头    //    Content-Length(文件的大小)290    //    Content-Typemultipart/form-data; boundary(分隔符)=(可以随便写, 但是不能有中文)        NSString *headerStr = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];        [request setValue:headerStr forHTTPHeaderField:@"Content-Type"];        return request;}@end

在控制器使用如下：

////  ViewController.m//  06-POST上传////  Created by apple on 15/1/20.//  Copyright (c) 2015年 apple. All rights reserved.//#import "ViewController.h"#import "NSMutableURLRequest+Multipart.h"@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.    [self postUpLoad];}- (void)postUpLoad {        // 1. url    NSURL *url = [NSURL URLWithString:@"http://127.0.0.1/post/upload.php"];        // 2. post请求    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url andLoaclFilePath:[[NSBundle mainBundle] pathForResource:@"001.png" ofType:nil] andFileName:@"123456.png"];            // 3. 连接    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {                // 反序列化处理        id result = [NSJSONSerialization JSONObjectWithData:data options:0 error:NULL];                NSLog(@"result = %@", result);    }];}@end

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