在 collectionView 的 indexPath 處傳遞一個值

Question

我正在嘗試將 indexpath 中的值傳遞給下一個視圖 controller 但我不確定如何做到這一點。

var imageStore =  [Data]()
var imageStoreReference = [(resultResponse, Data)]()


 func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        let DestVC = self.navigationController?.storyboard?.instantiateViewController(withIdentifier: "DetailViewController") as! DetailViewController
        let filtered = imageStoreReference.filter({imageStore.contains($0.1)}).first
        DestVC.createdAt = filtered?.0.createdAt
        DestVC.Imagedescription = filtered?.0.description
        DestVC.instagram = filtered?.0.user.instagram
        DestVC.twitter = filtered?.0.user.twitter
        DestVC.portfolio = filtered?.0.user.portfolio
        DestVC.fullImage = filtered?.0.urls.regular
        DestVC.userProfileImage = filtered?.0.user.profileImageUrl.regular
}

這里是 resultResponse，它在 imageStoreReference 的元組中被引用。

struct resultResponse: Codable {
    let createdAt: String
    let description: String?
    let urls: urlResponse
    let user: userResponse
  }

struct urlResponse: Codable {
    let regular: String
    let small: String
}

struct userResponse: Codable {
    let instagram: String?
    let twitter: String?
    let name:String?
    let portfolio: String?
    let profileImageUrl: imageSize
    
    enum CodingKeys: String, CodingKey {
        case instagram = "instagram_username"
        case twitter = "twitter_username"
        case profileImageUrl = "profile_image"
        case name
        case portfolio = "portfolio_url"
    }
}

struct imageSize: Codable {
    let regular: String?
}

Answer 1

您應該在 DestVC 中創建一個類型為“resultResponse”的變量。

例子：

class DestVC: UIViewController {
    var filered: resultResponse?
}

在 CollectionView 中，您只需要傳遞 filtererd 變量。 它使您的代碼干凈。 你應該使用“if let...”來確保你的應用程序在數據為零時不會崩潰

例子：

var imageStore =  [Data]()
var imageStoreReference = [(String, Data)]()


 func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        let DestVC = self.navigationController?.storyboard?.instantiateViewController(withIdentifier: "DetailViewController") as! DetailViewController
    if let index = imageStoreReference.firstIndex(where: { (image) -> Bool in
        imageStore.contains(image.1)
    })
        let filtered = imageStoreReference[index]
        DestVC.filtered = filtered
}