ios - Create a semi circle with Core Graphics -


i want create perfect semi circle @ bottom of view , i'm getting arc in top of rectangle (see attached picture). code i'm using following circularrect origin = (x = 128, y = 514), size = (width = 64, height = 54)

    cgfloat archeight = 60.0;     cgrect arcrect = cgrectmake(circularrect.origin.x, circularrect.origin.y + circularrect.size.height - archeight, circularrect.size.width, archeight);      cgfloat arcradius = 60;     cgpoint arccenter = cgpointmake(arcrect.origin.x + arcrect.size.width/2, arcrect.origin.y + arcradius);      cgfloat angle = acos(arcrect.size.width / (2*arcradius));     cgfloat startangle = 270 * m_pi/180 + angle;     cgfloat endangle = 90 * m_pi/180 - angle;      cgcontextaddarc(context, arccenter.x, arccenter.y, archeight, startangle, endangle, 1);     cgcontextclip(context);     cgcontextclearrect(context, arcrect);     cgcontextsetfillcolorwithcolor(context, [uicolor greencolor].cgcolor);     cgcontextfillrect( context, arcrect);

enter image description here

what i'm doing wrong? thanks!

the radius you're supplying arc function large. rectangle width being 64, can fit circle has radius of 32 or less in it.


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