Objective C, code with C struct property, exception on calling getter

Question

Hi my code generates the following exception :

[Dot position]: unrecognized selector sent to class 0x58a8.

What I do is I add instance of class Dot, to an NSArray (which is a property called dots) and then I try to get it back with;

Dot *last = [self.dots lastObject];

and print values inside C struct called position of type "CGPoint", last.position.x and last.position.y.

@property (nonatomic, readwrite) CGPoint position;

is witten inside Dot class .h file, which I also import to where I make a call to CGPoint getter.

Casting value returned from the array with (Dot*) does not help as well. Explicit addition of -(CGPoint) position to Dot .h file has no effect either.

Line generating the exception is:

NSLog(@"Dot added at: X : %f Y: %f", last.position.x, last.position.y);

I synthesize in my Dot.m file, do I have to do that in other files If I mention getters/setters for properties of Dot? @synthesize position = _position; — foFox
– foFox, Commented Dec 23, 2011 at 18:35
Also I noticed +[Dot position]:unrecognized selector sent to class 0x58a8. Seems like it tries to message the class itself not an instance of it? — foFox
– foFox, Commented Dec 23, 2011 at 18:43

foFox · Accepted Answer · 2011-12-24 04:50:17Z

1

Error found, I had a Class method where I was returning, what I was thinking instance of Dot, I was doing it using [Dot alloc] init] where this returns Class object, I should have used [self alloc] init], to return instance of a Dot instead.

answered Dec 24, 2011 at 4:50

foFox

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