i have a String NSString *const kAUrl = @"http://www.google/start.php?show=best&usr=(here)&pwd=x";
and
i want to pass another String NSString *a = @"aa";
to above url at the place i have written (here) in above url.
How can i pass it?
regards.
2
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Why are you creating a string constant that you are then trying to modify?MystikSpiral– MystikSpiral2010-11-17 13:17:00 +00:00Commented Nov 17, 2010 at 13:17
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I can't see the value of making an NSString constant, when it is already immutable?DJ Bouche– DJ Bouche2010-11-17 13:26:27 +00:00Commented Nov 17, 2010 at 13:26
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4 Answers
You will need to encode the string suitable for URL using
the NSString instance method -[stringByAddingPercentEscapesUsingEncoding:].
Then place into the URL using -[stringWithFormat:].
For example:
-(NSURL*)showBestURLWithUser:(NSString*)user {
{
user = [user stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding];
static NSString* template = @"http://www.google/start.php?show=best&usr=%@&pwd=x";
NSString* urlString = [NSString stringWithFormat:template, user];
return [NSURL URLWithString:urlString];
}
4 Comments
DJ Bouche
is there a reason for using const? the string is immutable in this state (without assigning a new object reference to it), as it is not a NSMutableString...
DJ Bouche
As far as I know, a const NSString* object you will not be able to re-assign a new NSString, and will only take a constant string (ie, @"string").
Shishir.bobby
suggest me plz. i need const.
PeyloW
@shishir.bobby: I extended the example to use a constant string for the URL template, and framed it in a proper method context.
Use NSString stringWithFormat:
NSString *a = @"hello";
NSString *kAUrl = [NSString stringWithFormat:@"http://www.google/start.php?show=best&usr=%@&pwd=x", a];
kAUrl now contains the contents of a where the %@ was.
Watch out though - if a contains any URL reserved characters (i.e. an & etc) it might break your url.
2 Comments
Shishir.bobby
its wont work, since NSString *const a ; a is const..it giving me error.plz suggest.
deanWombourne
Why must it be a const? Just don't make it a const and you should be fine.
You would change your declaration to this:
NSString *kAUrl = [NSString stringWithFormat:@"http://www.google/start.php?show=best&usr=%@&pwd=x", a];
Good Luck!
Comments
NSString *a = @"aa";
NSString *kAUrl = [NSString stringWithFormat:@"http://www.google/start.php?show=best&usr=%@&pwd=x",a];
kAUrl = [kAUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
job done.
