Question

import UIKit

let reuseIdentifier = "MyCell"

class ViewController: UIViewController, UICollectionViewDataSource {
    var myimage = UIImage(named: "1433584709_clock_ios7_ios_7")  

    @IBOutlet weak var collectionView: UICollectionView!  

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

        let cell = collectionView.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath) as! CollectionViewCell
        cell.imageView.image = myimage
        return cell
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        self.collectionView.collectionViewLayout = CollectionViewLayout()
        self.collectionView.registerClass(CollectionViewCell.self, forCellWithReuseIdentifier: "MyCell")
        // Do any additional setup after loading the view, typically from a nib.
    }
}

我有这个代码添加这么多具有相同图像的单元格。但是，我想让细胞有不同的图片。请告诉我怎么做。

Answer 1

使用图像数组而不是var myImage，因为集合视图或tableview需要某种形式的列表或数组来存储所有项目。 indexPath.row将返回collectionview正在查找的图像的索引。即。

var images: [String] = ["image1", "image2"]

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath) as! CollectionViewCell
    cell.imageView.image =  UIImage(named: self.images[indexPath.row])
    return cell
}

同样在功能collectionView:numberOfItemsInSection: 返回self.images.count

这是完整的代码，假设您有一个自定义的CollectionViewCell类

class ViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate {

@IBOutlet weak var collectionView: UICollectionView!

var images : [String] = ["image1", "image2"]
private let reuseIdentifier = "MyCell"

    override func viewDidLoad() {
        super.viewDidLoad()
        self.collectionView.registerClass(CollectionViewCell.self, forCellWithReuseIdentifier: "MyCell")
    }

    func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath) as! CollectionViewCell
        cell.imageView.image =  UIImage(named: self.images[indexPath.row])
        return cell
    }

    func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return self.images.count
    }

}

Answer 2

你的图片来自哪里？

假设我有像myImageArray [] []这样的2D图像数组，然后更改行：

cell.imageView.image = myImage

到

cell.imageView.image = myImageArray[indexPath.section][indexPath.row]

UICollectionViewCell。我想添加2个不同的图片单元格

2 个答案: