How to draw a rectangle?
You can't do it in a viewController.You need to extend your View and add the code under "drawRect:"
this will change the drawing logic of your view.
-(void) drawRect:(CGRect)rect{ [super drawRect:rect]; CGRect rectangle = CGRectMake(0, 100, 320, 100); CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetRGBFillColor(context, 1.0, 0.0, 0.0, 1.0); CGContextSetRGBStrokeColor(context, 1.0, 0.0, 0.0, 1.0); CGContextFillRect(context, rectangle);}
modern 2018 solution..
override func draw(_ rect: CGRect) { let r = CGRect(x: 5, y: 5, width: 10, height: 10) UIColor.yellow.set() UIRectFill(r)}that's it.
Just for clarity:
If You need to draw a rectangle which has the same fill and border color, then You can replace:
CGContextSetRGBFillColor(context, 1.0, 0.0, 0.0, 1.0);CGContextSetRGBStrokeColor(context, 1.0, 0.0, 0.0, 1.0);with:
[[UIColor redColor] set];