Question

我想在自定义集合视图单元格内的按钮目标函数中导航新的视图控制器

   import UIKit
    class ItemDetailsHeaderCell: UICollectionViewCell {
    let likeImage : UIButton = {

    let btn = UIButton()
    btn.setImage(#imageLiteral(resourceName: "like").withRenderingMode(.alwaysTemplate), for: [])
    btn.tintColor = main_color
    return btn
}()

     override init(frame: CGRect) {
    super.init(frame: frame)
    addSubview(likeImage)
   // anchor function to put constrains

    likeImage.anchor(bottomAnchor, left: leftAnchor, bottom: 
    bottomAnchor, right: rightAnchor, topConstant: 0, leftConstant: 0, 
     bottomConstant: 0, rightConstant: 0, widthConstant: 0, 
     heightConstant: 50)
     likeImage.addTarget(self, action: #selector(likeWeb), for: 
    .touchDown)
   }

   @objc func likeWeb() {

      // here it is not work 
       let controller =  ItemDetailsViewController(collectionViewLayout: 
       UICollectionViewFlowLayout())

        controller.itemid = String( indexPath.row )

        navigationController?.pushViewController(controller, animated: 
        true)
    }

}

注意：我仅使用swift代码，我的项目中没有任何存储板

Answer 1

@objc func likeWeb() {

      // here it is not work 
       let controller = self.storyboard?.instantiateViewControllerWithIdentifier("ItemDetailsViewControllerIdentifier") as! ItemDetailsViewController

        controller.itemid = String( indexPath.row )

        self.navigationController?.pushViewController(controller, animated: 
        true)
    }

Answer 2

this post may help you

 let vc = TwoViewController(nibName: "TwoViewController",bundle: nil)
    navigationController?.pushViewController(vc,animated: true)

Answer 3

更改为“惰性变量”，而不是“ let”

    lazy var likeImage : UIButton = {

    let btn = UIButton()
    btn.setImage(#imageLiteral(resourceName: "like").withRenderingMode(.alwaysTemplate), for: [])
    btn.tintColor = main_color
    return btn
}()

pushViewController（UIViewController（），animated：true）在自定义集合视图单元格按钮目标函数中不起作用

3 个答案: