前言：ios開(kāi)發(fā)中經(jīng)常遇到一個(gè)view上只要兩個(gè)圓角的情況。
1.切四個(gè)圓角的情況

view.layer.cornerRadius = 12;
view.layer.masksToBounds = YES;

2.單獨(dú)切圓角的情況，比如切左上、右上兩個(gè)圓角

 UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0, 0, SCREEN_WIDTH, 1000) byRoundingCorners:UIRectCornerTopLeft | UIRectCornerTopRight cornerRadii:CGSizeMake(12, 12)];
 CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
 maskLayer.frame = self.bottomView.bounds;
 maskLayer.path = maskPath.CGPath;
 self.bottomView.layer.mask = maskLayer;

解決！
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