//橢圓

-(void)rangleView:(CGRect)frame{

? ? UIBezierPath *rectPath = [UIBezierPath bezierPathWithRect:self.frame];

? ? UIBezierPath *circlePath = [UIBezierPath bezierPathWithOvalInRect:frame];

? ? [rectPath appendPath:circlePath];

? ? CAShapeLayer *mask1 = [CAShapeLayer layer];

? ? mask1.frame = CGRectMake(0, 0, COVERVIEW_WIDTH, COVERVIEW_HEIGHT);

? ? mask1.backgroundColor = [UIColor clearColor].CGColor;

? ? mask1.fillColor = [UIColor whiteColor].CGColor;

? ? mask1.path = rectPath.CGPath;

? ? mask1.fillRule = kCAFillRuleEvenOdd;

? ? self.layer.mask = mask1;

}