passing float variable as parameter

Question

Hi,

I am trying to write a method with float parameter and call it using performselector but i am getting error in doing this. Following is my code:

[sender performSelector:selector withObject:progress/total];

here progress and total both are float variabal.

I am trying to call following method in different class

-(void) updateProgress:(float)fl {

}

Answer 1

You need to pass a real object, not one of the basic types like int or float.

Wrap it into an NSNumber object:

[sender performSelector:selector withObject:[NSNumber numberWithFloat:progress/total]];

-(void) updateProgress:(NSNumber *)aProgress {
   float fProgress = [aProgress floatValue];
}

Answer 2

It's because -performSelector:withObject: only works for Objective-C objects. float isn't one of these.

Why not just use

[(TheClass*)sender updateProgress:progress/total];

?