我试图只传递一个struct的图像部分(也包含两个textFields,另一个我想不通过的imageView)。
这是tableViewController
import UIKit
class SentMemesTableViewController: UITableViewController {
var _tableView: UITableView!
var memeData: [Meme] = []
//calling memes from array in Delegate
let appDelegate = UIApplication.shared.delegate as! AppDelegate
var memes: [Meme] {
return appDelegate.memes
}
override func viewWillAppear(_ animated: Bool) {
tableView.reloadData()
}
override func viewDidLoad() {
super.viewDidLoad()
tableView.isScrollEnabled = true
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "MemeDetailViewController" ,
let nextScene = segue.destination as? MemeDetailViewController ,
let indexPath = tableView.indexPathForSelectedRow {
let selectedMeme = memes[indexPath.row].memedImage
nextScene.sentMemeView.image = Meme.memedImage
}
}
// MARK: - Table view data source
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
//navigationController!.pushViewController(MemeDetailViewController, animated: true)
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return memes.count
}
// Here it is! -----
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let tableViewCell = tableView.dequeueReusableCell(withIdentifier: "sentMemesTableView") as! MemeTableViewCell
let meme = memes[indexPath.row]
tableViewCell.tableViewImage.image = meme.memedImage
tableViewCell.tableViewLabel.text = "\(meme.topText)...\(meme.bottomText)"
return tableViewCell
}
// Override to support conditional editing of the table view.
override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
// Return false if you do not want the specified item to be editable.
return true
}
// Override to support conditional rearranging of the table view.
override func tableView(_ tableView: UITableView, canMoveRowAt indexPath: IndexPath) -> Bool {
// Return false if you do not want the item to be re-orderable.
return false
}
func deleteMemesInTableViewCell(_ index: Int) {
let appDelegate = UIApplication.shared.delegate as! AppDelegate
appDelegate.memes.remove(at: index)
}
override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if (editingStyle == UITableViewCellEditingStyle.delete) {
tableView.beginUpdates()
deleteMemesInTableViewCell(indexPath.row)
tableView.deleteRows(at: [indexPath], with: UITableViewRowAnimation.left)
tableView.endUpdates()
}
}
}
这是Meme和SentMemeView结构。
import Foundation
import UIKit
struct Meme {
let topText: String
let bottomText: String
let originalImage: UIImage
let memedImage: UIImage
}
struct SentMemeImageView {
var memedImageDetailVC: UIImageView
}
我找不到成功调用它的方法。
这是MemeDetailViewController。我只需要sentMemeView来显示SentMemeImageView。
class MemeDetailViewController: UIViewController {
var meme = SentMemeImageView?.self
@IBOutlet weak var sentMemesBtn: UIBarButtonItem!
@IBOutlet weak var editBtn: UIBarButtonItem!
@IBOutlet weak var sentMemeView: UIImageView!
func displayMeme(_ meme: SentMemeImageView) {
}
@IBAction func launchMemeEditorViewController(_ sender: Any) {
_ = navigationController?.popViewController(animated: true)
}
//unwinding to the view before (the collectionView, or the tableView)
@IBAction func unwindVC(for unwindSegue: UIStoryboardSegue, towardsViewController subsequentVC: UIViewController) {
self.dismiss(animated: true, completion: nil)
}
}
答案 0 :(得分:0)
首先,伤心地说,你的代码是相当搞砸: 您有三种不同类型的数据源,一些被忽略,一些被使用,但不是以一致的方式:
memeData
属性(显示数据)memes
属性(忽略)您应该关注数据的存储位置以及如何访问数据。
其次,您不会将视图从一个视图控制器发送到另一个视图控制器,但数据。所以请使用UIImage
而不是UIImageView
。因此,您将SentMemeImage
交给细节控制器。
我试着稍微清理一下代码,但只是为了回答你的明确问题。请重构一下!
struct Meme {
let topText: String
let bottomText: String
let originalImage: UIImage
let memedImage: UIImage
}
struct SentMemeImage {
var memedImage: UIImage
}
class SentMemesTableViewController: UITableViewController {
var memeData: [Meme] = []
// ----8<---- snipp ----8<----
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "MemeDetailViewController" ,
let nextScene = segue.destination as? MemeDetailViewController ,
let indexPath = tableView.indexPathForSelectedRow {
let selectedMeme = memeData[indexPath.row]
let sentMemeImage = SentMemeImage(memedImage: selectedMeme.memedImage)
nextScene.meme = sentMemeImage
}
}
// ----8<---- snipp ----8<----
}
class MemeDetailViewController: UIViewController {
var meme:SentMemeImage?
@IBOutlet weak var sentMemesBtn: UIBarButtonItem!
@IBOutlet weak var editBtn: UIBarButtonItem!
@IBOutlet weak var sentMemeView: UIImageView!
func displayMeme() {
self.sentMemeView.image = self.meme?.memedImage
}
}