Three parameter in Post method using nsurlconnection - ios

Question

I am new to IOS i need to pass three parameter in POST method.my parameter are (1)str (2)str1 (3)str2.this three parameter are fetch from different url in string format.
coding for POST method:
i need to add these parameter in method?i already added str parameter but i am struggling to pass other two(str1,str2) parameter.
-(void) sendDataToServer : (NSString *) method params:(NSString *)str{
NSString *post = [NSString stringWithFormat:#"branch_id=%#",str];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:#"%lu", (unsigned long)[post length]];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:URL]];
[request setHTTPMethod:#"POST"];
[request setValue:postLength forHTTPHeaderField:#"Content-Length"];
[request setHTTPBody:postData];
NSURLConnection *theConnection = [NSURLConnection connectionWithRequest:request delegate:self];
if( theConnection ){
mutableData = [[NSMutableData alloc]init];
}
}
Viewdidload:
here also i want to str1 and str2 parameter.
[self sendDataToServer :#"POST" params:str];

Answer 1

you can implement in multiple ways
Choice-1
-(void) sendDataToServer : (NSString *) method firstparams:(NSString *)firststr secondparam:(NSString *)secondstr thirdparam:(NSString *)thirdstr{
NSString *post = [NSString stringWithFormat:#"branch_id=%#&xxxx=%#&yyyyy=%#",firststr,secondstr,thirdstr];
// continue your works as its same flow
call method like
[self sendDataToServer :#"POST" firstparams:#"yourbranchID" secondparam:#"xxxValue" thirdparam:#"yyyyvalue"];
Choice-2
what ever you did is correct, just modify some code in viewdidload or else
// add all values in one string using stringWithFormat
NSString *str = [NSString stringWithFormat:#"branch_id=%#&xxxx=%#&yyyyy=%#",firststr,secondstr,thirdstr];
// and pass the param to web call
[self sendDataToServer :#"POST" params:str];
call method as
-(void) sendDataToServer : (NSString *) method params:(NSString *)str{
// no need of this line
// NSString *post = [NSString stringWithFormat:#"branch_id=%#",str];
// directly called the str in her
NSData *postData = [str dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:#"%lu", (unsigned long)[post length]];
/.... as its is continue the same work

Answer 2

instead of passing it as NSString just add the three string in a globally declared array and add objects to it and send it to web service.
or create them as NSDictionary and convert them as json string to web service.
NSDictionary *params = #{#"param1": str1, #"param2": str2, #"param3": str3 };
[self sendDataToServer :#"POST" params:params];
-(void) sendDataToServer : (NSString *) method params:(NSDictionary *)dict
{
NSError *error;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dict
options:NSJSONWritingPrettyPrinted // Pass 0 if you don't care about the readability of the generated string
error:&error];
if (! jsonData) {
NSLog(#"Got an error: %#", error);
} else {
NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:URL]];
[request setHTTPMethod:#"POST"];
[request setValue:jsonString forHTTPHeaderField:#"Content-Length"];
[request setHTTPBody:jsonData];
NSURLConnection *theConnection = [NSURLConnection connectionWithRequest:request delegate:self];
if( theConnection ){
mutableData = [[NSMutableData alloc]init];
}
}
}