iOS Converting float to NSString

[liptonlover]

Here's the code...

- (void)sendVariable:(float)variable toOutlet:(id)outlet {
	[outlet setText:variable];
}

Here's the error.
error: incompatible type for argument 1 of 'setText:'

The text property in UILabel accepts NSStrings only but I need it to display float values. I looked under NSString but couldn't find anything such as 'stringFromDouble' so I don't know what to do.

Also... I got this warning.

warning: conflicting types for '-(void)sendVariable:(float)variable toOutlet:(id)outlet'

I don't understand what this warning means. Can anyone help?
Thanks in advance, Nate

 

[dejo]

Look into using stringWithFormat.

 

[jeremy.king]

^
|
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what he said

 

[liptonlover]

Ok, here's the code now.

- (void)sendVariable:(float)variable toOutlet:(id)outlet {
	[string initWithFormat:@"%f"];
	[string setValue:variable];
	[outlet setText:string];
	[string release];
}

I have one more problem. Now that I've formatted the NSString instance, I don't know how to give it a value. It doesn't have a setValue: property or method, nor does it have a setText: one. Sorry if I'm missing something painfully obvious, it wouldn't be the first time.

 

[jnic]

Ok, here's the code now.

- (void)sendVariable:(float)variable toOutlet:(id)outlet {
	[string initWithFormat:@"%f"];
	[string setValue:variable];
	[outlet setText:string];
	[string release];
}

I have one more problem. Now that I've formatted the NSString instance, I don't know how to give it a value. It doesn't have a setValue: property or method, nor does it have a setText: one. Sorry if I'm missing something painfully obvious, it wouldn't be the first time.

http://developer.apple.com/DOCUMENTATION/Cocoa/Conceptual/Strings/Articles/FormatStrings.html

- (void)sendVariable:(float)variable toOutlet:(id)outlet {
	[outlet setText:[NSString stringWithFormat:@"%f", variable]];
}

 

[liptonlover]

Thanks, I didn't know stringWithFormat could then accept a variable as a second argument.
Thanks, Nate

 

[jnic]

Thanks, I didn't know stringWithFormat could then accept a variable as a second argument.
Thanks, Nate

NSString behaves in roughly the same way as C's printf (http://en.wikipedia.org/wiki/Printf#1970s:_C.2C_Lisp) so will take as many arguments as you care to add.

 

[liptonlover]

Thanks
Cheers, Nate