Question

Hello i want to override drawrect in my custom annotationView, so when i write

[[_mapView viewForAnnotation:annotation] setNeedsDisplay]; 

my annotation view will be redrawn and i wouldn’t have to remove the annotation and add it again.

here is my drawRect

- (void)drawRect:(CGRect)rect {
    UIImage* theImage = nil;
    if( _pinType == T_UNKNOWN ) theImage = [UIImage imageNamed:@"imgU.png"];
    else theImage = [UIImage imageNamed:@"imgK.png"];
    [theImage drawInRect:rect];
}

The problem is that my images are with alpha and the alpha part is black.

So maybe anyone knows the solution or some suggestions to this?
I’ve read a lot of post about this, also using core graphics, but didn’t find the solution..

Thanks in advance!

Answer 1

Do you want this view to be partially transparent and display things under it? If so, use [self setOpaque:NO]. An opaque view’s drawRect is responsible for drawing every pixel in the rectangle with a fully opaque color.