Objective-C

Keeping Query Params in a Hashtable

Demonstrates how to use a Chilkat Hashtable to hold query params and re-emit as a query param string.

Note: The ToQueryString method was added in Chilkat v9.5.0.92.

Objective-C

#import <CkoHashtable.h>
#import <NSString.h>
#import <CkoStringTable.h>

BOOL success = NO;

CkoHashtable *ht = [[CkoHashtable alloc] init];

//  Add name/value pairs from an existing query param string where the values are already URL encoded.
NSString *qp = @"txt=this%20is%20a%20test&color=blue&fruits=apples%26oranges";
success = [ht AddQueryParams: qp];

//  Add some additional name/value pairs.
[ht AddStr: @"name" value: @"Jack Sparrow"];
[ht AddStr: @"movie" value: @"Pirates of the Carribean"];

//  Iterate over the hash table to show what we have..

CkoStringTable *keys = [[CkoStringTable alloc] init];
[ht GetKeys: keys];
int numKeys = [keys.Count intValue];
NSString *key = 0;
NSString *val = 0;
int i = 0;
while (i < numKeys) {
    key = [keys StringAt: [NSNumber numberWithInt: i]];
    val = [ht LookupStr: key];
    NSLog(@"%@%@%@",key,@" = ",val);
    i = i + 1;
}

//  Output for the above loop:

//  color = blue
//  name = Jack Sparrow
//  fruits = apples&oranges
//  txt = this is a test
//  movie = Pirates of the Carribean

//  Get all name/value pairs as a query parm string with values URL encoded
qp = [ht ToQueryString];
NSLog(@"%@",qp);

//  Result:
//  color=blue&name=Jack%20Sparrow&fruits=apples%26oranges&txt=this%20is%20a%20test&movie=Pirates%20of%20the%20Carribean