如何使用 swift 将单元格添加到动态集合视图

Question

在该图像的顶部，您可以看到一些图像和加号按钮，我想在我的应用程序中这样做，所以我使用集合视图来获取此视图，一切正常，但我无法将单元格添加到我的动态集合视图中一个帮我完成这个过程

我的视图控制器中的代码：

 import UIKit
import Alamofire
import SwiftyJSON
import SDWebImage
import SwiftElegantDropdownMenu
class EditPendingViewController: UIViewController,UITableViewDelegate,UITableViewDataSource,UITextViewDelegate,UICollectionViewDelegate,UICollectionViewDataSource,UIImagePickerControllerDelegate,UINavigationControllerDelegate{



var pendingImageString:[String]!

 @IBOutlet var editPendingCollectionvIEW: UICollectionView!
 override func viewDidLoad() {
        super.viewDidLoad()

 }

 func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {

        return pendingImageString.count
    }
    func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {

        let cell = collectionView.dequeueReusableCellWithReuseIdentifier("editPendingCell", forIndexPath: indexPath) as!MypendindeditCollectionViewCell
        let img:NSString = pendingImageString[indexPath.item]
        cell.editImage.sd_setImageWithURL(NSURL(string: imageApikey + (img as String)))
        cell.contentView.layer.borderColor = UIColor.lightGrayColor().CGColor
        cell.contentView.layer.borderWidth = 1.0
        return cell
    }

}

我还没有完成任何将单元格添加到我的集合视图的过程，我只是从服务器加载了数据。现在帮助添加单元格

Answer 1

 func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return pendingImageString.count + 1 // + 1 for last cell
}

override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {

    let cell : CollectionViewCell = collectionView.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath) as! CollectionViewCell
     cell.btn.tag = indexPath.row

     if indexPath.item = pendingImageString.count {
       cell.imageview = //your static image that is shown in last cell
       cell.cancelButton.isHidden = true
     }
     else{
         let img:NSString = pendingImageString[indexPath.item]
         cell.editImage.sd_setImageWithURL(NSURL(string: imageApikey + (img as String)))
         cell.cancelButton.isHidden = false
     }

}

override func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
     if indexPath.item = pendingImageString.count{
       // update your array with new image file
     }
}

// cancel button action
func buttonClicked(sender: UIButton?) {
    let tag = sender.tag
        // remove object from array and reload collectionview        
}

Answer 2

点击集合视图的最后一个单元格添加逻辑以在数据库中输入您的产品，然后重新加载集合视图

   func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        if indexPath.row == pendingImageString.count - 1
        {
            //TODO - add item to database and reload collectionview
        }
    }