- (void)drawRect:(CGRect)rect {    CGContextRef context = UIGraphicsGetCurrentContext();    CGContextMoveToPoint(context, 0, 0);    CGContextAddRect(context,CGRectMake(100, 100, 200 , 150));    CGContextMoveToPoint(context, 200, 175);    CGContextAddArc(context, 200, 175, 50,-3.14/2.0,3.14/2.0, 0);    CGContextAddLineToPoint(context, 200 , 175);    CGContextMoveToPoint(context, 160, 175);    CGContextAddArc(context, 160, 175, 50,-5.0*3.14/6.0,-7.0*3.14/6.0, 1);    CGContextAddLineToPoint(context, 160, 175);        //画边框    //CGContextStrokePath(context);        //设置填充色    [[UIColor redColor] setFill];    [[UIColor colorWithRed:0.6 green:0.4 blue:0.5 alpha:0.5] setFill];        //设置边框颜色    [[UIColor blackColor] setStroke];    //[[UIColor greenColor] set];        //EVEN-ODD， 奇偶规则填充    CGContextDrawPath(context, kCGPathEOFillStroke);        //控制点    CGContextAddCurveToPoint(context, 50, 0, 50, 200, 100, 100);    CGContextAddQuadCurveToPoint(context, 150, 0, 200, 100);    CGContextStrokePath(context);}@end