How to Concatenate a string in URL on Xcode (Objective-c)?

Question

I need to replace "CurrentLocation" with a value in following URL. "CurrentLocation" is a predefined string and it gives a dynamic value (I mean different name of location/city each time). I need help, How to do it in Objective-C ??

NSURL *MainURL = [NSURL URLWithString:@"http://news.google.com/news?q=location:CurrentLocation&output=rss"];

In JavaScript i would do something like this;

var a="Google"; var b=".com"; var c=".np"; var d=a+b+c; document.write(d);

Please somebody help me with this. Thanks!!

RedBlueThing · Accepted Answer · 2011-04-07 01:31:09Z

12

You can use the the stringWithFormat static message on the NSString class. This will create an autoreleased NSString object using the formatting you specify (using printf style format string). So for your case:

// get the current location from somewhere
NSString * yourCurrentLocation = @"Sydney";

// create your urlString %@ is replaced with the yourCurrentLocation argument
NSString * urlString = [NSString stringWithFormat:@"http://news.google.com/news?q=location:%@&output=rss", yourCurrentLocation];

edited Apr 7, 2011 at 1:31

answered Apr 7, 2011 at 1:15

RedBlueThing

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5 Comments

Himalay Over a year ago

Thanks for your quick response. I tried as you described, but sad thing is It says "too many arguments to method call, expected 1, have 2." :(

RedBlueThing Over a year ago

@Himalay You must have made a mistake copying this into your code. I did a verbatum copy and paste into my project and these lines compile. Try setting yourCurrentLocation explicitly (edited answer).

Himalay Over a year ago

One more thing, how can i call a NSString value of "- (void)" into a "- (BOOL)" ?

RedBlueThing Over a year ago

@Himalay Glad you sorted it out. Not sure what you mean by that last comment, perhaps write it up as a new question with more information :).

RedBlueThing Over a year ago

@Himalay If you are happy with this answer, you can click the "accepted answer" tick to mark it as such ... welcome to StackOverflow.

Cesar A. Rivas · Accepted Answer · 2011-04-07 01:34:22Z

1

also, a good method is stringByAppendingString, here is more info in the apple site.

NSString *errorTag = @"Error: ";
NSString *errorString = @"premature end of file.";
NSString *errorMessage = [errorTag stringByAppendingString:errorString];

answered Apr 7, 2011 at 1:34

Cesar A. Rivas

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