Instance variable used while 'self' is not set to the result of

Question

I'm working with SGAREnvioroment, and I get the following error:

Instance variable used while 'self' is not set to the result of '[(super or self) init...]'

In this piece of code:

@interface SG3DOverlayView (Private)

- (id) initGLES;
- (void) drawView;
- (BOOL) createFramebuffer;
- (void) destroyFramebuffer;

- (void) clearTouches;

@end

@implementation SG3DOverlayView

+ (Class) layerClass
{
    return [CAEAGLLayer class];
}

-(id) initWithFrame:(CGRect)frame
{
    if(self = [super initWithFrame:frame]) {
        self = [self initGLES];
    }

    return self;
}

-(id) initGLES
{
    self.multipleTouchEnabled = YES;
    self.exclusiveTouch = YES;

    CAEAGLLayer *eaglLayer = (CAEAGLLayer*) self.layer;

    eaglLayer.opaque = YES;
    eaglLayer.drawableProperties = [NSDictionary dictionaryWithObjectsAndKeys:
                                    [NSNumber numberWithBool:FALSE], kEAGLDrawablePropertyRetainedBacking,
                                    kEAGLColorFormatRGBA8, kEAGLDrawablePropertyColorFormat,
                                    nil];

    context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES1];
    if(!context || ![EAGLContext setCurrentContext:context] || ![self createFramebuffer]) {
        [self release];
        return nil;
    }

    self.backgroundColor = [UIColor clearColor];

    mainSubview = [[UIView alloc] initWithFrame:self.frame];
    mainSubview.backgroundColor = [UIColor clearColor];

    animationInterval = 1.0;
    pinchTimer = nil;
    dragging = NO;
    currentSphereRadius = 0.0;

    [self clearTouches];

    return self;
}

I get the "error" here:

if(!context || ![EAGLContext setCurrentContext:context] || ![self createFramebuffer]) {

But, as you can see, self is setup on -(id) initWithFrame:(CGRect)frame , and -(id) initGLES is private, so it is always called from -(id) initWithFrame:(CGRect)frame .

So, may I have to do something to fix it?

Answer 1

Don't prefix your function name with init - the analyzer assumes that it's an initializer, and in this case it isn't.

Also, the function shouldn't return self if it isn't initialising it. Make it void.

Answer 2

Similar questions/answers:

• Obj-, Instance variable used while 'self' is not set to the result of '[(super or self) init...]'
• Obj-C, Instance variable used while 'self' is not set to the result of '[(super or self) init...]'

And your -(id)initGLES looks more like -(void)setupGLES ...