ios - 显示从 url 到 Collection View Swift 单元格的 3 张图像

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我从 API 请求了 3 个图像 URL。我想在 Collection View 上的单元格中显示 url 图像中的 3 张图像。我是快速编程新手

这是我的代码

class MainCollectionViewController: UICollectionViewController {

override func viewDidLoad() {
    super.viewDidLoad()

    Alamofire.request(.POST, "URL").responseJSON { response in

        if let value = response.result.value {

            let json = JSON(value)

            let data = json["data"].arrayValue

            for datas in data {

                let result = datas["image"].stringValue

                print(result)

            }
        }
    }
}

override func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
    return 1
}

override func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return 3
}

    override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath) as! MainCollectionViewCell

        return cell
     }
}

我的 ImageView 位于名为 mainImageView 的 mainCollectionViewCell 上

Answer 1

在代码中编写如下内容，

class MainCollectionViewController: UICollectionViewController {

var myImageArray : NSMutableArray = NSMutableArray()

override func viewDidLoad() {
super.viewDidLoad()

Alamofire.request(.POST, "URL").responseJSON { response in

    if let value = response.result.value {

        let json = JSON(value)

        let data = json["data"].arrayValue

        for datas in data {

            let result = datas["image"].stringValue

            self.myImageArray.addObject(result)
            print(result)

        }
    }
}
}

override func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
return 1
}

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

override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath) as! MainCollectionViewCell

    let url = NSURL(string: self.myImageArray.objectAtIndex(indexPath.row) as String)
    let data = NSData(contentsOfURL: url!) //make sure your image in this url does exist, otherwise unwrap in a if let check
    cell.mainImageView.image = UIImage(data: data!)

    return cell
 }
}

希望这对你有帮助:)