passing parameter in nsurlconnection Post method - ios

Question

I tired picker view with array of four element from url link "branch_name"
(1) with button action.
Button action:
- (IBAction)picker_button:(id)sender {
NSString *parseURL =#"url(1)";
NSString *encodeurl =[parseURL stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSURL *url = [NSURL URLWithString:encodeurl];
NSData *data = [NSData dataWithContentsOfURL:url];
if(data){
NSError *error;
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options: kNilOptions error:&error];
arrMsg = [json valueForKeyPath:#"Branches.branch_name"];
NSLog(#"%#",json);
arrmsg1 =[json valueForKeyPath:#"Branches.id"];
[_pickerdata1 reloadAllComponents];
}
}
Then I used url link(2) passing parameter using POST NSURLConnection and successfully displayed in tableview.
Post method coding:
here i am passing parameter as Branchid=#"1" only but i want to pass parameter as entire branchid value. help me
-(void) sendDataToServer : (NSString *) method{
NSString *Branchid =#"1" ;
NSURL *url = nil;
NSMutableURLRequest *request = nil;
if([method isEqualToString:#"GET"]){
NSString *getURL = [NSString stringWithFormat:#"%#?branch_id=%#", URL, Branchid];
url = [NSURL URLWithString: getURL];
request = [NSMutableURLRequest requestWithURL:url];
NSLog(#"%#",getURL);
}else{ // POST
NSString *parameter = [NSString stringWithFormat:#"branch_id=%#",Branchid];
NSData *parameterData = [parameter dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
url = [NSURL URLWithString: URL];
NSLog(#"%#", parameterData);
request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPBody:parameterData];
arr= [NSMutableString stringWithUTF8String:[parameterData bytes]];
}
[request setHTTPMethod:method];
[request addValue: #"application/x-www-form-urlencoded; charset=utf-8" forHTTPHeaderField:#"Content-Type"];
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
if( connection )
{
mutableData = [NSMutableData new];
}
}
connection did finish loading:
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSError* error;
json = [NSJSONSerialization JSONObjectWithData: mutableData
options:kNilOptions
error:&error];
NSLog(#"%#",json);
sellArray = [json valueForKeyPath:#"BranchByList.sell"];
buyArray = [json valueForKeyPath:#"BranchByList.buy"];
updataedArray = [json valueForKeyPath:#"BranchByList.updated"];
imageArray = [json valueForKeyPath:#"BranchByList.flag_image"];
currency =[json valueForKeyPath:#"BranchByList.currency"];
[ _dataview reloadData];
}