从一个视图控制器访问一组图像到另一个视图控制器，以添加滑动手势识别器
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【中文标题】从一个视图控制器访问一组图像到另一个视图控制器，以添加滑动手势识别器【英文标题】：accessing an array of images from 1 view controller to another, to add swipe gesture recognizer 【发布时间】：2017-08-04 21:22:55 【问题描述】：我有一个包含图像数组的集合视图。当我按下任何图像时，它将在另一个类中全屏打开该图像。我试图在第二个视图控制器中添加滑动手势识别器，但我不知道如何访问第一个视图控制器中的数组。
这是我第一个在集合视图中显示图像的视图控制器
class sowrController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource
@IBOutlet weak var collectionView: UICollectionView!
var albums = [AlbumModel]()
let db : DBHelperMo2lfat = DBHelperMo2lfat()
var selectedIndex : Int = -1
var posts : Post!
override func viewDidLoad()
super.viewDidLoad()
collectionView.delegate = self
collectionView.dataSource = self
self.albums.removeAll()
self.albums.append(contentsOf: self.db.fetchAllImages())
self.collectionView.reloadData()
DataService.ds.REF_POSTS_SOWR.observe(.value, with: (snapshot) in
if let snapshot = snapshot.children.allObjects as? [FIRDataSnapshot]
self.albums.removeAll()
for snap in snapshot
print ("SNAP: \(snap)")
if let postDict = snap.value as? Dictionary<String, AnyObject>
let album : AlbumModel = AlbumModel(id: postDict["id"] as! String, name: postDict["image_name"] as! String, path: postDict["image_path"] as! String, url: postDict["image_path"] as! String, localPath: "")
if let items = snap.children.allObjects as? [FIRDataSnapshot]
for itemSnap in items
if let albumSnap = itemSnap.value as? Dictionary<String, AnyObject>
album.childAlbums.append(AlbumModel(id: albumSnap["id"] as! String, name: albumSnap["image_name"] as! String, path: albumSnap["image_path"] as! String, url: albumSnap["image_path"] as! String, localPath: ""))
self.albums.append(album)
self.collectionView.reloadData()
)
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int
return self.albums.count
func numberOfSections(in collectionView: UICollectionView) -> Int
return 1
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell
if let cell = collectionView.dequeueReusableCell(withReuseIdentifier: Constants.BookCellReuseIdentifier, for: indexPath) as? collectionViewCellSowr
let album = albums[indexPath.item]
cell.initWithAlbumModel(album: album)
return cell
else
return collectionViewCellSowr()
private struct Constants
static let BookCellReuseIdentifier = "cell"
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath)
self.selectedIndex = indexPath.row
self.performSegue(withIdentifier: "showAlbum", sender: self)
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
if segue.identifier == "showAlbum"
let vc = segue.destination as! imageFullScreen
vc.images = self.albums[self.selectedIndex]
这是第二个让图像全屏显示的视图控制器
class imageFullScreen: UIViewController
var images : AlbumModel?
let db : DBHelperMo2lfat = DBHelperMo2lfat()
@IBAction func pictureSwipe(_ sender: Any)
@IBOutlet weak var caption: UILabel!
@IBOutlet weak var imageView: UIImageView!
override func viewDidLoad()
super.viewDidLoad()
self.caption.text = images?.imageName
let url = URL(string: (images?.imagePath)!)
self.imageView.sd_setImage(with: url, placeholderImage: nil, options: [.progressiveDownload,.retryFailed])
【问题讨论】：
【参考方案1】：编辑：
好的，这是一个集合视图控制器，它将图像视图创建为子视图并响应滑动手势。请确保您的资产文件夹中有两个图像“Image”和“Image-1”。
//
// CollectionViewController.swift
// test
//
// Created by Yonatan Vainer on 05/08/2017.
// Copyright © 2017 Sensus Healthcare LLC. All rights reserved.
//
import UIKit
private let reuseIdentifier = "id"
class CollectionViewController: UICollectionViewController
var imageView = UIImageView(frame: CGRect(x: 0, y: 100, width: 300, height: 300))
var index = 0;
let names = ["Image","Image-1"]
override func viewDidLoad()
super.viewDidLoad()
//For left swipe
let left = UISwipeGestureRecognizer(target: self, action: #selector(self.goLeft(_:)))
left.direction = .left
imageView.addGestureRecognizer(left)
//For right swipe
let right = UISwipeGestureRecognizer(target: self, action: #selector(self.goRight(_:)))
right.direction = .right
imageView.addGestureRecognizer(right)
imageView.isUserInteractionEnabled = true
self.view.addSubview(imageView)
self.view.layoutSubviews()
// Uncomment the following line to preserve selection between presentations
// self.clearsSelectionOnViewWillAppear = false
// Register cell classes
// Do any additional setup after loading the view.
override func didReceiveMemoryWarning()
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
*/
// MARK: UICollectionViewDataSource
override func numberOfSections(in collectionView: UICollectionView) -> Int
// #warning Incomplete implementation, return the number of sections
return 1
override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int
// #warning Incomplete implementation, return the number of items
return names.count
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: reuseIdentifier, for: indexPath)
// Configure the cell
let nail = UIImageView(frame: CGRect(x: 0, y: 0, width: 50, height: 50))
nail.image = UIImage(named: names[indexPath.row])
cell.backgroundView = nail
return cell
override func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath)
imageView.image = UIImage(named: names[indexPath.row])
index = indexPath.row
func goLeft(_ gesture: UISwipeGestureRecognizer)
index += 1
if index<0
index = 0
imageView.image = UIImage(named: names[index])
func goRight(_ gesture: UISwipeGestureRecognizer)
index -= 1
if index>1
index = 1
imageView.image = UIImage(named: names[index])
// MARK: UICollectionViewDelegate
/*
// Uncomment this method to specify if the specified item should be highlighted during tracking
override func collectionView(_ collectionView: UICollectionView, shouldHighlightItemAt indexPath: IndexPath) -> Bool
return true
*/
/*
// Uncomment this method to specify if the specified item should be selected
override func collectionView(_ collectionView: UICollectionView, shouldSelectItemAt indexPath: IndexPath) -> Bool
return true
*/
/*
// Uncomment these methods to specify if an action menu should be displayed for the specified item, and react to actions performed on the item
override func collectionView(_ collectionView: UICollectionView, shouldShowMenuForItemAt indexPath: IndexPath) -> Bool
return false
override func collectionView(_ collectionView: UICollectionView, canPerformAction action: Selector, forItemAt indexPath: IndexPath, withSender sender: Any?) -> Bool
return false
override func collectionView(_ collectionView: UICollectionView, performAction action: Selector, forItemAt indexPath: IndexPath, withSender sender: Any?)
*/
================================================ ====================
在情节提要中，单击您的集合视图并嵌入导航控制器。 这将添加一个带有后退按钮的顶部栏。 附image。
【讨论】：
我要做的是在一组图像之间左右滚动，类似于任何图像库 好的。选项很少。这是一个：在这种情况下，不要使用第二个视图控制器。在集合视图控制器内的任何单元格上单击，以编程方式创建 UIImageView，用您的图像填充它，通过分配宽度和高度使其全屏显示，并将其添加为子视图。然后，当您获得滑动手势时，只需分配不同的图像并重新加载视图。 刚刚更新了我的答案。在我的模拟器上检查它，它工作正常。如果是你需要的，欢迎采纳：）【参考方案2】：我不确定我是否完全理解你的问题，因为我不明白数组与手势识别器有什么关系，但如果你只是想从以前的 ViewController 访问数组，这应该可以工作 如果你有导航控制器：
let vcIndex = self.navigationController?.viewControllers.index(where: (viewController) -> Bool in
if let _ = viewController as? sowrController
return true
return false
)
let prevVC = self.navigationController?.viewControllers[vcIndex!] as! sowrController
let albums:[AlbumModel] = prevVC.albums
【讨论】：
@abdo 查看this link。 Duncan C 的答案正是您所需要的。以上是关于从一个视图控制器访问一组图像到另一个视图控制器，以添加滑动手势识别器的主要内容，如果未能解决你的问题，请参考以下文章
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