[_btn1.layersetMasksToBounds:YES];[_btn1.layersetCornerRadius:3.0]; //设置矩圆角半径[_btn1.layersetBorderWidth:1.0];  //边框宽度//单边边框(右边)CALayer *deleteBtnBorder = [CALayer layer];float height = self.deleteBtn.height;float width = self.deleteBtn.width;deleteBtnBorder.frame = CGRectMake(width, 0, 1, height);deleteBtnBorder.backgroundColor = [UIColor redColor].CGColor;[self.deleteBtn.layer addSublayer:deleteBtnBorder];