一、先来写写一张的吧
请求方式 post
-（void）upload{
NSString *urlStr = [NSString stringWithFormat:url];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:urlStr] cachePolicy:0 timeoutInterval:5.0f];
[self setRequest:request];
NSLog(@"开始上传");
NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
NSLog(@"Result -- %@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);
}];
//发起
[dataTask resume];
}
-(void)setRequest:(NSMutableURLRequest *)request{
NSString *boundary = [NSString stringWithFormat:@"Boundary+%08X%08X",arc4random(),arc4random()];
//表单数据（这里可以放文本信息）
NSMutableDictionary *param = [[NSMutableDictionary alloc] init];
[param setValue:@"" forKey:@""];
[param setValue:@“" forKey:@""];
[param enumerateKeysAndObjectsUsingBlock:^(id _Nonnull key, id _Nonnull obj, BOOL * _Nonnull stop) {
NSMutableString *fieldStr = [NSMutableString string];
[fieldStr appendString:[NSString stringWithFormat:@"--%@\r\n", boundary]];
[fieldStr appendString:[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", key]];
[fieldStr appendString:[NSString stringWithFormat:@"%@", obj]];
[body appendData:[fieldStr dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
}];
//图片数据部分
NSMutableString *topStr = [NSMutableString string];
//取到图片
NSString *path = [[NSBundle mainBundle] pathForResource:@"001.jpg" ofType:nil];
NSData *data = [NSData dataWithContentsOfFile:path];
[topStr appendString:[NSString stringWithFormat:@"--%@\r\n", boundary]];
//这里具体怎么写，跟后台交流。。。
[topStr appendString:@"Content-Disposition: form-data; name= \"content2[]\"; filename=\"001.jpg\"\r\n"];
[topStr appendString:@"Content-Type:image/jpeg"];
[topStr appendString:@"Content-Transfer-Encoding: binary\r\n\r\n"];
[body appendData:[topStr dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:data];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
// 结束部分
NSString *bottomStr = [NSString stringWithFormat:@"--%@--", boundary];
/**拼装成格式：
--Boundary+72D4CD655314C423--
*/
//将body字符串转化为UTF8格式的二进制
[body appendData:[bottomStr dataUsingEncoding:NSUTF8StringEncoding]];
// 设置请求类型为post请求
request.HTTPMethod = @"post";
// [request setValue:appKey forHTTPHeaderField:@"appKey"];
// [request setValue:appId forHTTPHeaderField:@"appId"];
[request setValue:@"multipart/form-data" forHTTPHeaderField:@"Content-Type"];
// 设置request的请求体
request.HTTPBody = body;
// 设置头部数据，标明上传数据总大小，用于服务器接收校验
[request setValue:[NSString stringWithFormat:@"--%ld", body.length] forHTTPHeaderField:@"Content-Length"];
// 设置头部数据，指定了http post请求的编码方式为multipart/form-data（上传文件必须用这个）。
[request setValue:[NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary] forHTTPHeaderField:@"Content-Type"];
}
多张上传的关注我，下一篇就是。。。。