StackOverflow2013

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POSetting nested objects?
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copied!<p>I am just trying to make sure I am getting things right as I move forward with Objective-C, two quick questions if I may:</p> <p>(1) Am I accessing the Position object correctly from within Rectangle? am I right to access the Position object contained within by the pointer I set in the init, or is there a better way?</p> <p>(2) In [setPosX: andPosY:] Which of the two ways of setting the Position instance variables is best, or does it really not matter?</p> <pre><code>// INTERFACE @interface Position: NSObject { int posX; int posY; } @property(assign) int posX; @property(assign) int posY; @end @interface Rectangle : NSObject { Position *coord; } -(void) setPosX:(int) inPosX andPosY:(int) inPosY; // IMPLEMENTATION @implementation Rectangle -(id) init { self = [super init]; if (self) { NSLog(@"_init: %@", self); coord = [[Position alloc] init]; // Released in dealloc (not shown) } return(self); } -(void) setPosX:(int) inPosX andPosY:(int) inPosY { //[coord setPosX:inPosX]; //[coord setPosY:inPosY]; coord.posX = inPosX; coord.posY = inPosY; } </code></pre> <h1>EDIT_01</h1> <p>Do I then call -(id)initWithX:andY: from the Rectangle object when I init it? and if so how do I go about setting posX and posY from within main()? or do I replace the init for rectangle with a further -(id)initWithX:andY: and pass the values through?</p> <pre><code>@implementation Rectangle -(id) init { self = [super init]; if (self) { NSLog(@"_init: %@", self); coord = [[Position alloc] initWithX:1234 andY:5678]; } return(self); } ... </code></pre> <p>cheers gary</p>

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