设置UIView特定几个角为圆角

正文

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UIView *view = [[UIView alloc] initWithFrame:CGRectMake(120, 10, 80, 80)];
view.backgroundColor = [UIColor redColor];
[self.view addSubview:view]; 
UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:view.bounds 
  byRoundingCorners:UIRectCornerBottomLeft | UIRectCornerBottomRight 
  cornerRadii:CGSizeMake(10, 10)];
CAShapeLayer *maskLayer = [[CAShapeLayer alloc] init];
maskLayer.frame = view.bounds;
maskLayer.path = maskPath.CGPath;
view.layer.mask = maskLayer;

其中，

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