Create Line with arrow in iOS Objective C

Solution:

In iOS you can create a Line using CGContextref.The below code is used for draw a line in a view in x1,y1, is 0,0 and x2,y2 is 20,20.

Also add the cap in the end of the line to show the line as arrow

    CGContextRef ctx = UIGraphicsGetCurrentContext();

    CGRect rect = CGRectMake(0, 0,20,20)

    CGContextClearRect(ctx, rect);

    CGContextSetStrokeColorWithColor(ctx, color.CGColor);

    CGContextSetLineCap(ctx, kCGLineCapRound);

    CGContextSetLineWidth(ctx, 10);

    CGContextSetAlpha(ctx, 1);

    CGContextMoveToPoint(ctx, 0, 0);

//add the cap    

        CGPoint fPoint=CGPointMake(0,0);
        CGPoint ePoint=CGPointMake(20,20);

        CGFloat capHeight = 1 * 4.0f;

        CGFloat angle = [self angleWithFirstPoint:fPoint secondPoint:ePoint];
        CGPoint p1 = [self pointWithAngle:angle + 7.0f * M_PI / 8.0f distance:capHeight];
        CGPoint p2 = [self pointWithAngle:angle - 7.0f * M_PI / 8.0f distance:capHeight];
        CGPoint endPointOffset = [self pointWithAngle:angle distance:1];
        NSLog(@"Down");
        p1 = CGPointMake(ePoint.x + p1.x, ePoint.y + p1.y);
        p2 = CGPointMake(ePoint.x + p2.x, ePoint.y + p2.y);
       
        CGContextMoveToPoint(ctx, p1.x, p1.y);

    CGContextAddLineToPoint(ctx, 20, 20);

    CGContextStrokePath(ctx);

    CGContextDrawPath(ctx, kCGPathFillStroke);