設置按鈕圓角邊框顏色及粗細

UIButton *iconView = [UIButton buttonWithImage:@”touxiang”];
iconView.layer.cornerRadius = iconView.w * 0.5;//按鈕寬度的一半
iconView.layer.masksToBounds = YES;
iconView.layer.borderWidth = 2.0f;
iconView.layer.borderColor = [UIColor whiteColor].CGColor;