问题描述

我以编程方式在 UICollectionViewCell 的 indexPath 中创建了多个 UIButton.现在我想打印单击添加到收藏夹"，但单击 UIButton 后它没有打印任何内容.UIButton 确实可以查看除 addTarget 功能之外的所有内容，但未单击.

I made multiple UIButton in a indexPath in a UICollectionViewCell programmatically. now i want to print "clicked add to favourite" but it is not printing anything after click UIButton. the UIButton does view everything except addTarget function not click.

import UIKit

//**UICollectionViewCell**
class DescriptionCell: UICollectionViewCell, UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout {


    override init(frame: CGRect) {
        super.init(frame: frame)


        setupCell()

    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }



    lazy var addToCart: UIButton = {

        let btn = UIButton()
        btn.setTitle("Add to favourite", for: .normal)
        btn.isUserInteractionEnabled = true
        btn.setTitleColor(.white, for: .normal)

        btn.backgroundColor = UIColor.orange
        btn.titleLabel?.font = UIFont.boldSystemFont(ofSize: 8)
        btn.titleLabel?.textAlignment = .right

        // addToCart not click
        btn.addTarget(self, action: #selector(addToCartTarget), for: .touchUpInside)

        btn.layer.cornerRadius = 12

        return btn
    }()




    func setupCell() {



        addSubview(addToCart)



        addConstraintsWithFormat("H:|-80-[v0]-80-|", views: addToCart)
             addConstraintsWithFormat("V:|-380-[v0(25)]|", views: addToCart)


    }



    func addToCartTarget() {

        print("you clicked add to favourite")
    }




}

推荐答案

尝试用如下框架初始化按钮:

Try initializing button with frame like:

let btn = UIButton(frame: CGRect(x: 10, y: 10, width: 50, height: 20))

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