I am looking to create a system which on signup will create a subdomain on my website for the users account area.
Cisco Certified Network Associate Exam,640-802 CCNA All Answers ~100/100. Daily update
Cisco Certified Network Associate Exam,640-802 CCNA All Answers ~100/100. Daily update
I need to draw an outline for a rounded rectangle. I know I can make lines and arcs, but maybe there is also a function for rounded rects?
I don't think there is a nice predefined way to do this. However, this question has the code necessary to do it using line segments:
ReplyDeletehttp://stackoverflow.com/questions/1031930/how-is-a-rounded-rect-view-with-transparency-done-on-iphone/1031936#1031936
There is no prepackaged way to this, you must combine arcs in order to do this, apples quartzdemo project shows the code to do this, here is a reference Quartz Demo and here is the code they provide
ReplyDelete// As a bonus, we'll combine arcs to create a round rectangle!
// Drawing with a white stroke color
CGContextRef context=UIGraphicsGetCurrentContext()
CGContextSetRGBStrokeColor(context, 1.0, 1.0, 1.0, 1.0);
// If you were making this as a routine, you would probably accept a rectangle
// that defines its bounds, and a radius reflecting the "rounded-ness" of the rectangle.
CGRect rrect = CGRectMake(210.0, 90.0, 60.0, 60.0);
CGFloat radius = 10.0;
// NOTE: At this point you may want to verify that your radius is no more than half
// the width and height of your rectangle, as this technique degenerates for those cases.
// In order to draw a rounded rectangle, we will take advantage of the fact that
// CGContextAddArcToPoint will draw straight lines past the start and end of the arc
// in order to create the path from the current position and the destination position.
// In order to create the 4 arcs correctly, we need to know the min, mid and max positions
// on the x and y lengths of the given rectangle.
CGFloat minx = CGRectGetMinX(rrect), midx = CGRectGetMidX(rrect), maxx = CGRectGetMaxX(rrect);
CGFloat miny = CGRectGetMinY(rrect), midy = CGRectGetMidY(rrect), maxy = CGRectGetMaxY(rrect);
// Next, we will go around the rectangle in the order given by the figure below.
// minx midx maxx
// miny 2 3 4
// midy 1 9 5
// maxy 8 7 6
// Which gives us a coincident start and end point, which is incidental to this technique, but still doesn't
// form a closed path, so we still need to close the path to connect the ends correctly.
// Thus we start by moving to point 1, then adding arcs through each pair of points that follows.
// You could use a similar tecgnique to create any shape with rounded corners.
// Start at 1
CGContextMoveToPoint(context, minx, midy);
// Add an arc through 2 to 3
CGContextAddArcToPoint(context, minx, miny, midx, miny, radius);
// Add an arc through 4 to 5
CGContextAddArcToPoint(context, maxx, miny, maxx, midy, radius);
// Add an arc through 6 to 7
CGContextAddArcToPoint(context, maxx, maxy, midx, maxy, radius);
// Add an arc through 8 to 9
CGContextAddArcToPoint(context, minx, maxy, minx, midy, radius);
// Close the path
CGContextClosePath(context);
// Fill & stroke the path
CGContextDrawPath(context, kCGPathFillStroke);
Instead of making your own path out of lines and arcs, you can use
ReplyDelete[UIBezierPath bezierPathWithRoundedRect:cornerRadius:]
or
[UIBezierPath bezierPathWithRoundedRect:byRoundingCorners:cornerRadii:]
(the second one lets you specify which corners are rounded)
Available in iOS 3.2 or later.