调用Obj-C方法

Question

I want to call a method B using a different method A. The problem is that the aksed parameters of method B is not present in Method A. here's what I've tried ..

-(void) methodA {

     // some code

    CGSize *size = [CGSizeMake(self.frame.size.width, self.frame.size.height)];

    [self methodB:size];
}

-(void) methodB:(CGSize) size {

    //some code
}

There is certainly a better way...

Thanks

Answer 1

I don't think your code will be compiled.

CGSize is not an object. Refactor to:

CGSize size = CGSizeMake(self.frame.size.width, self.frame.size.height);
[self methodB:size];

Answer 2

You should only wrap [] around methods. CGSizeMake(self.frame.size.width, self.frame.size.height) is a function, not a method, so get rid of the square braces. You can tell it's a function because functions look like functionName(argument1, argument2, ...) whereas methods look like [object methodName:argument1 methondNameContinued:argument2] .

Further, CGSizeMake returns a CGSize structure, not a pointer to a CGSize structure, so ditch the * in *size .

Then you'll be left with this:

CGSize size = CGSizeMake(self.frame.size.width, self.frame.size.height);
[self methodB:size];

Which is correct.