如何在iOS中向uiview添加上下边框?

试试这个 -(void)addBottomBorderToView:(UIView *)view{ UIView *bottomBorder = [[UIView alloc]initWithFrame:CGRectMake(0,view.frame.size.height - 1, view.frame.size.width, 1)]; bottomBorder.backgroundColor = UIColor.darkGrayColor; [view addSubview:bottomBorder]; }

Swift:

func addBottomView(view : UIView){
let bottomView = CGRect(0,view.frame.size.height-1,view.frame.size.width,1)
bottomView.backgroundColor = UIColor.darkGrayColor
view.addSubView(bottomView)

}

尝试此代码,使用此代码可以设置顶部/按钮/左/右任何带颜色和粗细的边框。

extension CALayer {

    func addBorder(edge: UIRectEdge, color: UIColor, thickness: CGFloat) {

        let border = CALayer()

        switch edge {
        case .top:
            border.frame = CGRect(x: 0, y: 0, width: frame.width, height: thickness)
        case .bottom:
            border.frame = CGRect(x: 0, y: frame.height - thickness, width: frame.width, height: thickness)
        case .left:
            border.frame = CGRect(x: 0, y: 0, width: thickness, height: frame.height)
        case .right:
            border.frame = CGRect(x: frame.width - thickness, y: 0, width: thickness, height: frame.height)
        default:
            break
        }

        border.backgroundColor = color.cgColor;

        addSublayer(border)
    }
}

使用以下代码指定视图边框

view.layer.addBorder(edge: .top, color: .red, thickness: 1)
view.layer.addBorder(edge: .bottom, color: .red, thickness: 1)

注意:您可以将此函数用于 多个对象(例如uiview、uilabel、uibutton等) ,比如看这个例子

let MyView = UIView()
MyView.layer.addBorder(edge: .top, color: .red, thickness: 1)

let MyLabel = UILabel()
MyLabel.layer.addBorder(edge: .top, color: .red, thickness: 1)

let MyButton = UIButton()
MyButton.layer.addBorder(edge: .top, color: .red, thickness: 1)

let MyImageView = UIImageView()
MyImageView.layer.addBorder(edge: .top, color: .red, thickness: 1)