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24 voidaddShadowView . = @NSValue valueWithCGPoint:CGPointMake,,NSValue valueWithCGPoint:CGPointMake,; int radius = ; UIBezierPath path = UIBezierPath bezierPathWithRoundedRect:CGRectMake,,...,... cornerRadius:; NSValue point . UIBezierPath circlePath = UIBezierPath bezierPathWithRoundedRect:CGRectMakepoint..,point..,radius,radius cornerRadius:radius; path appendPath:circlePath; path setUsesEvenOddFillRule:YES; CAShapeLayer fillLayer = CAShapeLayer layer; fillLayer. = path.; fillLayer. = kCAFillRuleEvenOdd; fillLayer. = UIColor blackColor.; fillLayer. = ; . addSublayer:fillLayer; refs: http:stackoverflow.a 原文链接：https://www.f2er.com/note/422017.html
