uicollectionview segue to detail viewcontroller swift

Posted 2023-02-27

【中文标题】uicollectionview segue to detail viewcontroller swift

【英文标题】：

【发布时间】：2014-11-27 15:07:25

【问题描述】：

//
//  ViewController.swift
//  Fashun
//
//  Created by Alex Macleod on 20/10/14.
//  Copyright (c) 2014 Alex Macleod. All rights reserved.
//

import UIKit

class ViewController: UIViewController, UICollectionViewDelegateFlowLayout, UICollectionViewDataSource 

var collectionView: UICollectionView?

var instanceOfCustomObject: CustomObject = CustomObject()
var accessToken: NSString! = "1570900151.c2711e8.75915e1949da40f395bf22e17101b43d"
//var userDefaults: NSUserDefaults!
let colorWheel = ColorWheel()
var photoCount: Int! = 0
let photos = NSMutableArray()

    class PhotoAndData 
        var img: UIImage = UIImage()
        var date: Int = 0
        var likes: Int = 0
        var userLikePct: Float = 0
        init()
        
    

override func viewDidLoad() 

    super.viewDidLoad()

//    userDefaults = NSUserDefaults.standardUserDefaults()
//    self.accessToken = userDefaults!.objectForKey("accessToken") as NSString
//    println(self.accessToken)

//        instanceOfCustomObject.someProperty = "Hello World"
//        var accessToken : NSString? = NSString(instanceOfCustomObject.accessToken)
//        println(accessToken)
//    println("viewDidLoad")
//    instanceOfCustomObject.simpleAuth()
    instanceOfCustomObject.authorize()

// Do any additional setup after loading the view, typically from a nib.
    let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
//        layout.sectionInset = UIEdgeInsets(top: 20, left: 0, bottom: 0, right: 0)
    layout.itemSize = CGSize(width: 124, height: 124)
    layout.minimumInteritemSpacing = 1.0
    layout.minimumLineSpacing = 1.0
    collectionView = UICollectionView(frame: self.view.frame, collectionViewLayout: layout)
    collectionView!.dataSource = self
    collectionView!.delegate = self
    collectionView!.registerClass(Cell.self, forCellWithReuseIdentifier: "Cell")
    collectionView!.backgroundColor = UIColor.whiteColor()
    self.view.addSubview(collectionView!)


    getData()
//    imageCount()



    func getData() -> Void 
////
        let tuulavintageUrl = NSURL(string:"https://api.instagram.com/v1/users/7522782/media/recent/?access_token=\(self.accessToken)")
        let wendyslookbookUrl = NSURL(string:"https://api.instagram.com/v1/users/14454619/media/recent/?access_token=\(self.accessToken)")
//        
//        let sharedSession = NSURLSession.sharedSession()
//        let downloadTask: NSURLSessionDownloadTask = sharedSession.downloadTaskWithURL(baseUrl!, completionHandler:  (location: NSURL!, response: NSURLResponse!, error: NSError!) -> Void in

//            var urlContents = NSString.stringWithContentsOfURL(location, encoding: NSUTF8StringEncoding, error: nil)
//            println(urlContents)

            let tuulavintageData = NSData(contentsOfURL: tuulavintageUrl!)
            let wendyslookbookData = NSData(contentsOfURL: wendyslookbookUrl!)

            if (tuulavintageData != nil) & (wendyslookbookData != nil) 

                dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), 

                    let tuulavintageDictionary: NSDictionary = NSJSONSerialization.JSONObjectWithData(tuulavintageData!, options: nil, error: nil) as NSDictionary
                    var tuulavintageImageResponse = tuulavintageDictionary.valueForKeyPath("data.images.standard_resolution.url") as NSArray
                    var tuulavintageTimeResponse = tuulavintageDictionary.valueForKeyPath("data.created_time") as NSArray
                    var tuulavintageLikeResponse = tuulavintageDictionary.valueForKeyPath("data.likes.count") as NSArray
//                    println(tuulavintageTimeResponse)
                    self.addToPhotoArray(tuulavintageImageResponse, times: tuulavintageTimeResponse, likes: tuulavintageLikeResponse)

                    let wendyslookbookDictionary: NSDictionary = NSJSONSerialization.JSONObjectWithData(wendyslookbookData!, options: nil, error: nil) as NSDictionary
                    var wendyslookbookImageResponse = wendyslookbookDictionary.valueForKeyPath("data.images.standard_resolution.url") as NSArray
                    var wendyslookbookTimeResponse = wendyslookbookDictionary.valueForKeyPath("data.created_time") as NSArray
                    var wendyslookbookLikeResponse = wendyslookbookDictionary.valueForKeyPath("data.likes.count") as NSArray
                    //                    println(wendyslookbookTimeResponse)
                    self.addToPhotoArray(wendyslookbookImageResponse, times:wendyslookbookTimeResponse, likes:wendyslookbookLikeResponse)

                    self.photos.sortUsingComparator( (a, b) -> NSComparisonResult in
                        let x = a as PhotoAndData
                        let y = b as PhotoAndData
                        if  x.userLikePct < y.userLikePct 
                            return NSComparisonResult.OrderedDescending
                        
                        return NSComparisonResult.OrderedAscending
                    )
//
                    dispatch_async(dispatch_get_main_queue(),  () -> Void in

                        self.photoCount = tuulavintageImageResponse.count + wendyslookbookImageResponse.count as Int

                        self.collectionView?.reloadData()

                    )
                )

             else 

                let networkIssueController = UIAlertController(title: "Error", message: "Something went wrong get a better phone you pleb!", preferredStyle: .ActionSheet)
                let okButton = UIAlertAction(title: "OK", style: .Default, handler: nil)
                networkIssueController.addAction(okButton)
                let cancelButton = UIAlertAction(title: "Cancel", style: .Cancel, handler: nil)
                networkIssueController.addAction(cancelButton)

                self.presentViewController(networkIssueController, animated: true, completion: nil)

                dispatch_async(dispatch_get_main_queue(),  () -> Void in
                    //Stop refresh animation

                )
            
    

    override func didReceiveMemoryWarning() 
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    

    func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int 
        return photoCount
    

    func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell 
        let cell = collectionView.dequeueReusableCellWithReuseIdentifier("Cell", forIndexPath: indexPath) as Cell
    //                println(photos)
    //            cell.textLabel.text = "Text"
        var indexToUse = indexPath.row
        if indexPath.row >= photos.count 
            indexToUse = photos.count - 1
        
        let data = photos.objectAtIndex(indexToUse) as PhotoAndData
        cell.imageView.image =  data.img as UIImage
    //    cell.photo = self.photos[indexPath.row] as? NSDictionary
//        cell.imageView.backgroundColor = colorWheel.randomColor()

        return cell
    

我正在调用 Instagrams API，解析一些图像，然后将它们放入我的收藏视图，这是一堆正方形，就像 instagrams 应用程序一样。当我以编程方式点击我的一个集合视图单元格时，如何切换到新的“详细视图控制器”？

【参考方案1】：

您需要将 UICollecitonViewDelegate（或类似名称的名称）添加到该 ViewController 并定义此方法：

//MARK: - UICollectionViewDelegate

func collectionView(collection: UICollectionView, selectedItemIndex: NSIndexPath) 

   //As sender send any data you need from the current Selected CollectionView
   self.performSegueWithIdentifier("identifier", sender: self)

现在让它通过或获取 SegueController 并将数据设置为您需要的新控制器。

override func prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject!) 
    segue.desntinationViewController  as MySegueViewController//(Your Segue View Controller)
        // pass data to next view

PS：由于我不在 Mac 中，方法名称可能存在语法错误，请使用编辑器或文本完成器帮助您确定正确的名称。

但这就是调用 Segue 控制器所需的全部内容。还要记住在 Storyboard 文件中设置 Segue 标识符名称，否则它将无法正常工作。

【讨论】：

所以我让应用程序连接到“detailedViewController”，但我如何告诉它传递我选择的单元格的照片？

@alemac852 你必须使用方法参数“SelectedItemIndex.row”给出的索引来获取项目

【参考方案2】：

第 1 步：创建 var indexPath: 索引路径？ 和数组以将您的图像保留在详细视图页面中

第 2 步： 将此代码写入您的视图

override func prepare(for segue: UIStoryboardSegue, sender: Any?) 

    if let detailPage = segue.destination as? DetailPage 
        let cell = sender as! MyCollectionViewCell
        let indexPath = self.MyCollectionView.indexPath(for: cell)
        detailPage.indexPath = indexPath
        detailPage.YourArray = self.YourDetailPageArray