ios 文件上传

iOS开发网络篇—文件的上传

说明：文件上传使用的时POST请求，通常把要上传的数据保存在请求体中。本文介绍如何不借助第三方框架实现iOS开发中得文件上传。

　　由于过程较为复杂，因此本文只贴出部分关键代码。

主控制器的关键代码：

YYViewController.m

#import "YYViewController.h" 2  3 #define YYEncode(str) [str dataUsingEncoding:NSUTF8StringEncoding] 4  5 @interface YYViewController () 6  7 @end 8  9 @implementation YYViewController10 11 - (void)viewDidLoad12 {13     [super viewDidLoad];14     // Do any additional setup after loading the view, typically from a nib.15 }16 17 - (void)upload:(NSString *)name filename:(NSString *)filename mimeType:(NSString *)mimeType data:(NSData *)data parmas:(NSDictionary *)params18 {19     // 文件上传20     NSURL *url = [NSURL URLWithString:@"http://192.168.1.200:8080/YYServer/upload"];21     NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];22     request.HTTPMethod = @"POST";23     24     // 设置请求体25     NSMutableData *body = [NSMutableData data];26     27     /***************文件参数***************/28     // 参数开始的标志29     [body appendData:YYEncode(@"--YY\r\n")];30     // name : 指定参数名(必须跟服务器端保持一致)31     // filename : 文件名32     NSString *disposition = [NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\r\n", name, filename];33     [body appendData:YYEncode(disposition)];34     NSString *type = [NSString stringWithFormat:@"Content-Type: %@\r\n", mimeType];35     [body appendData:YYEncode(type)];36     37     [body appendData:YYEncode(@"\r\n")];38     [body appendData:data];39     [body appendData:YYEncode(@"\r\n")];40     41     /***************普通参数***************/42     [params enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {43         // 参数开始的标志44         [body appendData:YYEncode(@"--YY\r\n")];45         NSString *disposition = [NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n", key];46         [body appendData:YYEncode(disposition)];47 48         [body appendData:YYEncode(@"\r\n")];49         [body appendData:YYEncode(obj)];50         [body appendData:YYEncode(@"\r\n")];51     }];52     53     /***************参数结束***************/54     // YY--\r\n55     [body appendData:YYEncode(@"--YY--\r\n")];56     request.HTTPBody = body;57     58     // 设置请求头59     // 请求体的长度60     [request setValue:[NSString stringWithFormat:@"%zd", body.length] forHTTPHeaderField:@"Content-Length"];61     // 声明这个POST请求是个文件上传62     [request setValue:@"multipart/form-data; boundary=YY" forHTTPHeaderField:@"Content-Type"];63     64     // 发送请求65     [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {66         if (data) {67             NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];68             NSLog(@"%@", dict);69         } else {70             NSLog(@"上传失败");71         }72     }];73 }74 75 - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event76 {77     // Socket 实现断点上传78     79     //apache-tomcat-6.0.41/conf/web.xml 查找 文件的 mimeType80 //    UIImage *image = [UIImage imageNamed:@"test"];81 //    NSData *filedata = UIImagePNGRepresentation(image);82 //    [self upload:@"file" filename:@"test.png" mimeType:@"image/png" data:filedata parmas:@{@"username" : @"123"}];83     84     // 给本地文件发送一个请求85     NSURL *fileurl = [[NSBundle mainBundle] URLForResource:@"itcast.txt" withExtension:nil];86     NSURLRequest *request = [NSURLRequest requestWithURL:fileurl];87     NSURLResponse *repsonse = nil;88     NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&repsonse error:nil];89     90     // 得到mimeType91     NSLog(@"%@", repsonse.MIMEType);92     [self upload:@"file" filename:@"itcast.txt" mimeType:repsonse.MIMEType data:data parmas:@{93                                                                                               @"username" : @"999",94                                                                                               @"type" : @"XML"}];95 }96 97 @end

补充说明：

文件上传请求数据格式

部分文件的MIMEType