request请求 HTTPBody 格式

//Json格式

[mtbRequset setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
NSError *error;
NSData *body = [NSJSONSerialization dataWithJSONObject:bodyDict options:NSJSONWritingPrettyPrinted error:&error];
if (error) {
MBErrorLog(@"%@", error);
}
mtbRequset.HTTPBody = body;

//x-www-form-urlencoded格式

NSString *bodyStr = @"type=shentong&postid=3333557693903";
mutablerequest.HTTPBody = [bodyStr dataUsingEncoding:NSUTF8StringEncoding];
[mutablerequest setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];