如何在UITabbar中设置具有所需阴影的左上角和右上角半径? [英] How to set top left and right corner radius with desired drop shadow in UITabbar?

问题描述

我花了将近几个小时才弄明白.然而，这并没有发生，最后，我不得不来到这里.需要实现两件事:

I've spent almost a couple of hours to figure it out. However, it did not happen and finally, I had to come here. Two things are required to be achieved:

首先，我想在 UITabbar 的顶部(基本上是 TopRight 和 TopLeft)有一个自发的角半径.

Firstly I'd like to have a spontaneous corner radius at the top (which is basically TopRight & TopLeft) of UITabbar.

其次，我希望在这些圆角半径上方有一个阴影(如下图所示).

Secondly, I'd like to have a shadow above those corner radius(shown in below image).

请看下图

如果我需要任何进一步的信息，请告诉我，我一定会提供的.

Let me know if anything further required from my side, I'll surely provide that.

任何帮助将不胜感激.

编辑 1

这里又出现了一个小问题，假设，即使，但是，我们能够做到这一点，Apple 审核团队会接受该申请吗?我对此有点紧张和好奇.

One more little question arose here along, suppose, Even if, However, we were able to accomplish this, Would Apple review team accept the application? I'm being little nervous and curious about it.

推荐答案

Q :这里又出现了一个小问题，假设，即使，但是，我们能够做到这一点，Apple 审核团队会接受该申请吗?答:是的，他们接受您的应用，我添加了这种 TabBar.

Q : One more little question arose here along, suppose, Even if, However, we were able to accomplish this, Would Apple review team accept the application? A: Yes They are accept your app I have Add This Kind Of TabBar.

创建自定义标签栏

HomeTabController

HomeTabController

import UIKit

class HomeTabController: UITabBarController
{
    var viewCustomeTab : CustomeTabView!
    var lastSender : UIButton!

    //MARK:- ViewController Methods
    override func viewDidLoad()
    {
        super.viewDidLoad()

        UITabBar.appearance().shadowImage = UIImage()

        allocateTabItems()
    }

    //MARK:- Prepare Methods
    // Allocate shop controller with tab bar
    func allocateTabItems()
    {

        let vc1 = UIStoryboard.init(name: "Main", bundle: Bundle.main).instantiateViewController(withIdentifier: "Avc") as? Avc
        let item1 = UINavigationController(rootViewController: vc1!)
        self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for: .default)
        self.navigationController?.navigationBar.shadowImage = UIImage()
        self.viewControllers = [item1]
        createTabBar()
    }

    func createTabBar()
    {
        viewCustomeTab = CustomeTabView.instanceFromNib()
        viewCustomeTab.translatesAutoresizingMaskIntoConstraints = false
        viewCustomeTab.call()

        self.view.addSubview(viewCustomeTab)

        if #available(iOS 11, *)
        {
            let guide = view.safeAreaLayoutGuide
            NSLayoutConstraint.activate([guide.bottomAnchor.constraint(equalToSystemSpacingBelow: viewCustomeTab.bottomAnchor, multiplier: 0), viewCustomeTab.leadingAnchor.constraint(equalToSystemSpacingAfter: guide.leadingAnchor, multiplier: 0), guide.trailingAnchor.constraint(equalToSystemSpacingAfter: viewCustomeTab.trailingAnchor, multiplier: 0), viewCustomeTab.heightAnchor.constraint(equalToConstant: 70) ])
        }
        else
        {
            let standardSpacing: CGFloat = 0
            NSLayoutConstraint.activate([viewCustomeTab.topAnchor.constraint(equalTo: topLayoutGuide.bottomAnchor, constant: standardSpacing), bottomLayoutGuide.topAnchor.constraint(equalTo: viewCustomeTab.bottomAnchor, constant: standardSpacing)
                ])
        }

        viewCustomeTab.btnTab1.addTarget(self, action: #selector(HomeTabController.buttonTabClickAction(sender:)), for: .touchUpInside)
        viewCustomeTab.btnTab2.addTarget(self, action: #selector(HomeTabController.buttonTabClickAction(sender:)), for: .touchUpInside)
        viewCustomeTab.btnTab3.addTarget(self, action: #selector(HomeTabController.buttonTabClickAction(sender:)), for: .touchUpInside)
        viewCustomeTab.btnTab4.addTarget(self, action: #selector(HomeTabController.buttonTabClickAction(sender:)), for: .touchUpInside)
        viewCustomeTab.btnTab5.addTarget(self, action: #selector(HomeTabController.buttonTabClickAction(sender:)), for: .touchUpInside)

        //self.view.layoutIfNeeded()
        viewCustomeTab.layoutIfNeeded()
        viewCustomeTab.btnTab1.alignContentVerticallyByCenter(offset: 3)
        viewCustomeTab.btnTab2.alignContentVerticallyByCenter(offset: 3)
        viewCustomeTab.btnTab3.alignContentVerticallyByCenter(offset: 3)
        viewCustomeTab.btnTab4.alignContentVerticallyByCenter(offset: 3)
        viewCustomeTab.btnTab5.alignContentVerticallyByCenter(offset: 3)
        viewCustomeTab.btnTab1.isSelected = true
    }

    //MARK:- Button Click Actions
    //Manage Tab From Here
    func setSelect(sender:UIButton)
    {
        viewCustomeTab.btnTab1.isSelected = false
        viewCustomeTab.btnTab2.isSelected = false
        viewCustomeTab.btnTab3.isSelected = false
        viewCustomeTab.btnTab4.isSelected = false
        viewCustomeTab.btnTab5.isSelected = false
        sender.isSelected = true
    }

    @objc func buttonTabClickAction(sender:UIButton)
    {
        //self.selectedIndex = sender.tag
        if sender.tag == 0
        {
            let vc1 = UIStoryboard.init(name: "Main", bundle: Bundle.main).instantiateViewController(withIdentifier: "Bvc") as? Bvc

             let item1 = UINavigationController(rootViewController: vc1!)
            item1.navigationBar.isHidden = false
            self.viewControllers = [item1]
            setSelect(sender: viewCustomeTab.btnTab1)
            return
        }

        if sender.tag == 1
        {
            let vc2 = UIStoryboard.init(name: "Main", bundle: Bundle.main).instantiateViewController(withIdentifier: "Cvc") as? Cvc
            let item2 = UINavigationController(rootViewController: vc2!)
            item2.navigationBar.isHidden = false
            item2.navigationBar.isTranslucent = false
            self.viewControllers = [item2]
            setSelect(sender: viewCustomeTab.btnTab2)
            return
        }

        if sender.tag == 2
        {
            let vc3 = UIStoryboard.init(name: "Main", bundle: Bundle.main).instantiateViewController(withIdentifier: "Dvc") as? Dvc
            let item3 = UINavigationController(rootViewController: vc3!)
            item3.navigationBar.isHidden = false
             item3.navigationBar.isTranslucent = false
            self.viewControllers = [item3]
            setSelect(sender: viewCustomeTab.btnTab3)
            return
        }

        if sender.tag == 3
        {

        }

        if sender.tag == 4
        {

        }
    }
}


Create Custom View For Shadow Effect and For + Button. 

import UIKit

class CustomeTabView: UIView
{
    @IBOutlet weak var btnTab5: UIButton!
    @IBOutlet weak var btnTab4: UIButton!
    @IBOutlet weak var btnTab3: UIButton!
    @IBOutlet weak var btnTab2: UIButton!
    @IBOutlet weak var btnTab1: UIButton!
    @IBOutlet weak var vRadius: UIView!


    class func instanceFromNib() -> CustomeTabView
    {
        return UINib(nibName: "CustomeTabView", bundle: nil).instantiate(withOwner: nil, options: nil)[0] as! CustomeTabView
    }

    private var shadowLayer: CAShapeLayer!

    override func layoutSubviews()
    {
        super.layoutSubviews()

        let shadowSize : CGFloat = 2.0

        let shadowPath = UIBezierPath(roundedRect: CGRect(x: -shadowSize / 2,   y: -shadowSize / 2, width: self.vRadius.frame.size.width, height: self.vRadius.frame.size.height), cornerRadius : 20)

        self.vRadius.layer.masksToBounds = false
        self.vRadius.layer.shadowColor = UIColor.black.cgColor
        self.vRadius.layer.shadowOffset = CGSize.zero//(width: self.vRadius.frame.size.width, height: self.vRadius.frame.size.height)
        self.vRadius.layer.shadowOpacity = 0.5
        self.vRadius.layer.shadowPath = shadowPath.cgPath
        self.vRadius.layer.cornerRadius = 20
      }

OpenImg

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