如何在UIBezierPath上获得边界

我有这个

CGRect container = CGRectMake(conX, conY, 220, 50); UIBezierPath* path = [UIBezierPath bezierPathWithRoundedRect:container cornerRadius:5.0]; [[UIColor blueColor] setFill]; [path fillWithBlendMode:kCGBlendModeNormal alpha:0.7]; 

我想在它周围找一个灰色的蛀虫，在网上看了很多东西，但看不到一个方法很容易做到这一点，这有可能吗？

Answer 1

如果你不反对使用图层，像这样的东西可以为你工作：

 //create triangle path UIBezierPath* path = [UIBezierPath bezierPath]; [path moveToPoint:CGPointMake(0, 30)]; [path addLineToPoint:CGPointMake(100, 30)]; [path addLineToPoint:CGPointMake(100, 0)]; [path addLineToPoint:CGPointMake(0, 30)]; //apply path to shapelayer CAShapeLayer* greenPath = [CAShapeLayer layer]; greenPath.path = path.CGPath; [greenPath setFillColor:[UIColor greenColor].CGColor]; [greenPath setStrokeColor:[UIColor blueColor].CGColor]; greenPath.frame=CGRectMake(0, 0,100,30); //add shape layer to view's layer [[self layer] addSublayer:greenPath];