Change attribute in URL

[DrJones]

Hi,

I have a url:
www.test.com/webservice/id=1111

How can i change the id value 1111 in the url. I tried something like this:

NSURL = [[NSURL alloc] initWithContentsOfURL:@"www.test.com/webservice/id=%@", string];

Is this the wrong way of doing. Should i use ASIHTTPRequest? Can someone point me in the right direction, that would be nice!

[Duncan C]

Originally Posted by DrJones

Hi,

I have a url:
www.test.com/webservice/id=1111

How can i change the id value 1111 in the url. I tried something like this:

NSURL = [[NSURL alloc] initWithContentsOfURL:@"www.test.com/webservice/id=%@", string];

Is this the wrong way of doing. Should i use ASIHTTPRequest? Can someone point me in the right direction, that would be nice!

You're close. However, NSURL does not have a method initWithContentsOfURL. You should replace initWithContentsOfURL with initWithString in the above code.

You also need to make sure that the string you pass in does not contain any characters that need to be escaped, like "/", "?", quotes, spaces, "%", ":", etc. If it might, you will need to percent escape it before inserting it into your URL string.

[DrJones]

Originally Posted by Duncan C

You're close. However, NSURL does not have a method initWithContentsOfURL. You should replace initWithContentsOfURL with initWithString in the above code.

You also need to make sure that the string you pass in does not contain any characters that need to be escaped, like "/", "?", quotes, spaces, "%", ":", etc. If it might, you will need to percent escape it before inserting it into your URL string.

Thanks for the quick answer. I'm still having some trouble after following your advice. Currently i have this piece of code which takes a value from a textfield and convert it into a string. When i try to put that string in a url, the compiler says that have to many arguments in the method call.

int number = ([textfield.text integerValue]);
    NSString *numberString = [[NSString alloc] initWithFormat:@"%d", number];
    
    NSLog(@"number = %@", numberString);
    
    NSURL *url = [[NSURL alloc] initWithString:@"http://www.test.com/webservice/?id=%@", numberString];

[Duncan C]

Originally Posted by DrJones

Thanks for the quick answer. I'm still having some trouble after following your advice. Currently i have this piece of code which takes a value from a textfield and convert it into a string. When i try to put that string in a url, the compiler says that have to many arguments in the method call.

int number = ([textfield.text integerValue]);
    NSString *numberString = [[NSString alloc] initWithFormat:@"%d", number];
    
    NSLog(@"number = %@", numberString);
    
    NSURL *url = [[NSURL alloc] initWithString:@"http://www.test.com/webservice/?id=%@", numberString];

I'm guessing that the last line is the one that's throwing an error?

The method initWithString only takes one parameter, and you are passing 2 parameters.

You need to first create an URL string, then pass that string to the initWith string method.

Add a new local variable theURLString. Use stringWithFormat to build theURLString from your URL string, and the number string. Then pass theURLString to the NSURL method initWithString.

[DrJones]

Originally Posted by Duncan C

I'm guessing that the last line is the one that's throwing an error?

The method initWithString only takes one parameter, and you are passing 2 parameters.

You need to first create an URL string, then pass that string to the initWith string method.

Add a new local variable theURLString. Use stringWithFormat to build theURLString from your URL string, and the number string. Then pass theURLString to the NSURL method initWithString.

Ahh, thanks you are great!