UIView Structures

• CGPoint (x,y)
• CGSize (width, height)
• CGRect (origin + size, or CGPoint + CGSize)

Note the origin point is the upper-left hand corner (0,0)

X positive goes to the right

Y positive goes down

Creating CG objects:

CGPoint point = CGPointMake(50.0,100.0);

point.x = 50.0

point.y = 100.0

CGSize size = CGSizeMake(23.0,42.0);

size.width = 23.0;

size.height = 42.0;

CGRect rect = CGRectMake( x, y, width, height);

rect.origin.x = x1;

rect.origin.y = y1;

rect.size.width = w1;

rect.size.height = h1;