// — pre-calc some things // how many items around circle & angle of each int numTextItems = (int)_OuterTextArray.count; if (numTextItems<2) { return; } CGFloat singleItemAngle = 360.0/numTextItems; // center-point of view CGPoint centerPoint = CGPointMake(self.bounds.size.width/2, self.bounds.size.height/2); // radius of circle within view CGFloat viewCircleRadius = self.bounds.size.height/2.0 - _LineThickness/2; // outer circle (inset by line thickness) CGFloat outerCircleWidth = viewCircleRadius*_OuterCircleRelRadHeight; CGRect outerCircleTopBounds = CGRectInset(self.bounds, _LineThickness/2, _LineThickness/2); // inner circle CGFloat innerCircleWidth = viewCircleRadius*_InnerCircleRelRadHeight; CGRect innerCircleTopBounds = CGRectInset(outerCircleTopBounds, outerCircleWidth, outerCircleWidth); CGRect innerCircleBottomBounds = CGRectInset(innerCircleTopBounds, innerCircleWidth, innerCircleWidth); // — draw the circular floor if (_BackgroundFillColor) { [self fillCircleInBounds:outerCircleTopBounds withColor:_BackgroundFillColor]; } // draw the outer ring top [self strokeCircleInBounds:outerCircleTopBounds withLineWidth:_LineThickness withColor:_LineColor]; // draw the inner ring top [self strokeCircleInBounds:innerCircleTopBounds withLineWidth:_LineThickness withColor:_LineColor]; // draw the inner ring bottom [self strokeCircleInBounds:innerCircleBottomBounds withLineWidth:_LineThickness withColor:_LineColor]; // calculate how "centered" the circle is, +/- CGFloat spokeRelAngleOffset = singleItemAngle*(_RotationRelOfs-0.5); // calculate original spoke line start/endpoints (before rotating into place) CGPoint spokePointA = CGPointMake(centerPoint.x, centerPoint.y+viewCircleRadius); CGPoint spokePointB = CGPointMake(centerPoint.x, centerPoint.y+viewCircleRadius-outerCircleWidth-innerCircleWidth); // draw the spoke lines for (int spokeCounter=0; spokeCounter<numTextItems; spokeCounter++) { // angle to draw current line CGFloat currentSpokeAngle = spokeRelAngleOffset + spokeCounter*singleItemAngle; // calc line start/end points CGPoint currPointA = [self rotatePoint:spokePointA aroundPoint:centerPoint atAngle:currentSpokeAngle]; CGPoint currPointB = [self rotatePoint:spokePointB aroundPoint:centerPoint atAngle:currentSpokeAngle]; [OS_Bezier drawLineFromX1:currPointA.x fromY1:currPointA.y toX2:currPointB.x toY2:currPointB.y withLineWidth:_LineThickness withLineColor:_LineColor]; } // outer item font size/pos #define BASE_OFFSET 0.15 CGFloat outerTextFontSize = outerCircleWidth*0.7*(1.0+_TextRelativeSize/2.0); CGFloat outerTextBaseYPos = innerCircleTopBounds.origin.y + innerCircleTopBounds.size.height + outerTextFontSize*BASE_OFFSET; // inner item font size/pos CGFloat innerTextFontSize = innerCircleWidth*0.7*(1.0+_TextRelativeSize/2.0); CGFloat innerTextBaseYPos = innerCircleBottomBounds.origin.y + innerCircleBottomBounds.size.height + innerTextFontSize*BASE_OFFSET; // add a little baseline to yPOS CGPoint outerTextPoint = CGPointMake(spokePointA.x, outerTextBaseYPos); CGPoint innerTextPoint = CGPointMake(spokePointB.x, innerTextBaseYPos); // draw the text items, step1 is OUTER ring, step2 is INNER ring for (int step=1; step<=2; step++) { BOOL doOuter = (step==1); // doing outer or inner text CGPoint textPointStart = doOuter ? outerTextPoint : innerTextPoint; CGFloat fontSize = doOuter ? outerTextFontSize : innerTextFontSize; // do a ring of letters for (NSUInteger itemCounter=0; itemCounter<numTextItems; itemCounter++) { // angle to draw current text, which is +0.5 halfway between lines // note also we are going backwards to make the letters go counter-clockwise up around to the right CGFloat currentTextAngle = -(spokeRelAngleOffset + (itemCounter+0.5)*singleItemAngle); NSString* theItem = doOuter?_OuterTextArray[itemCounter]:_InnerTextArray[itemCounter]; OS_Font* itemFont = [OS_Font fontWithName:_TextFontName size:fontSize]; [self drawString:theItem withFont:itemFont withColor:_TextColor atMidPoint:textPointStart aroundPoint:centerPoint atAngle:currentTextAngle]; } }