1.加圓角

view.layer.cornerRadius = 8;

view.layer.masksToBounds = YES;

2.加單個圓角

UIBezierPath*path = [UIBezierPath bezierPathWithRoundedRect:sayWorldButton.bounds byRoundingCorners:UIRectCornerBottomLeft/*具體哪個角*/ cornerRadii:CGSizeMake(5,5)];

CAShapeLayer*la = [[CAShapeLayer alloc] init];

la.frame = <#要加圓角的控件#>.bounds;

la.path= path.CGPath;

<#要加圓角的控件#>.layer.mask = la;

3.加陰影

scanButton.layer.shadowColor= [UIColorblackColor].CGColor;//陰影的顏色

scanButton.layer.shadowOffset=CGSizeMake(1,1);//陰影的偏移量配合shadowRadius達到幾條邊有陰影的效果

scanButton.layer.shadowOpacity=0.5;//透明度

scanButton.layer.shadowRadius=1;//陰影大小

想要同是設(shè)置圓角和陰影

scanButton.layer.masksToBounds = YES;這個屬性要去掉

4.加邊框

view.layer.borderWidth = 5;

view.layer.borderColor = [[UIColor colorWithRed:0.52 green:0.09 blue:0.07 alpha:1] CGColor];