ios - 如何按 "created_time"对我的照片 NSMutable 数组中的图像进行排序，并让我的收藏 View 相应地显示它们？

Question

//
//  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! = "14128167.52d0add.2fbff9669d9141099597cbb8d67764a4"
var userDefaults: NSUserDefaults!
let colorWheel = ColorWheel()
var photoCount: Int! = 0
let photos = NSMutableArray()

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)
//        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
                    let wendyslookbookDictionary: NSDictionary = NSJSONSerialization.JSONObjectWithData(wendyslookbookData!, options: nil, error: nil) as NSDictionary
//                    println(tuulavintageDictionary)
                    var tuulavintageImageResponse = tuulavintageDictionary.valueForKeyPath("data.images.standard_resolution.url") as NSArray
                    var tuulavintageTimeResponse = tuulavintageDictionary.valueForKeyPath("data.created_time") as NSArray
//                    println(tuulavintageTimeResponse)
                    var wendyslookbookImageResponse = wendyslookbookDictionary.valueForKeyPath("data.images.standard_resolution.url") as NSArray
                    var wendyslookbookTimeResponse = wendyslookbookDictionary.valueForKeyPath("data.created_time") as NSArray
                    println(wendyslookbookTimeResponse)

                    for imageUrls in tuulavintageImageResponse {

                        var imageUrlsAsStrings: NSString = imageUrls as NSString
                        var imageAsNsurls = NSURL(string: imageUrlsAsStrings)

                        var err: NSError?
                        var imageData :NSData = NSData(contentsOfURL: imageAsNsurls!,options: NSDataReadingOptions.DataReadingMappedIfSafe, error: &err)!
                        self.photos.addObject(UIImage(data:imageData)!)
//                        println(self.photos)

                    }

                    for imageUrls in wendyslookbookImageResponse {

                        var imageUrlsAsStrings: NSString = imageUrls as NSString
                        var imageAsNsurls = NSURL(string: imageUrlsAsStrings)

                        var err: NSError?
                        var imageData :NSData = NSData(contentsOfURL: imageAsNsurls!,options: NSDataReadingOptions.DataReadingMappedIfSafe, error: &err)!
                        self.photos.addObject(UIImage(data:imageData)!)
//                        println(self.photos)

                    }

                    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"
        cell.imageView.image = photos.objectAtIndex(indexPath.row) as? UIImage
    //    cell.photo = self.photos[indexPath.row] as? NSDictionary
        cell.imageView.backgroundColor = colorWheel.randomColor()

        return cell
    }
}

如您所见，我正在为两个不同的用户“tuulavintage”和“wendyslookbook”调用 instagram 的 API 以获取他们的 20 张最新照片。然后我解析 imageUrls 的数据，将它们放入两个单独的 for in 循环中，在循环中我获取这些 imageUrls 并将它们更改为 UIImages 并将它们放入“let photos = NSMutableArray()”。然后我将 UIimage 添加到我的 Collection View 单元格“cell.imageView.image = photos.objectAtIndex(indexPath.row) as?UIImage”

我还计算我解析的 NSdictionary 响应，例如“self.photoCount = tuulavintageImageResponse.count + wendyslookbookImageResponse.count as Int”。所以我可以告诉我的 Collection View 要制作多少个单元格

这里也可以看到(全局主队列里面)"var tuulavintageTimeResponse = tuulavintageDictionary.valueForKeyPath("data.created_time") as NSArray"

在这里

"var wendyslookbookTimeResponse = wendyslookbookDictionary.valueForKeyPath("data.created_time") as NSArray"

我解析我的 NSDictionary 响应以检索每个图像的 unixtimecode 数组，但它们没有连接。

我的问题是，如何使用我可以检索的 unixtimecode 命令这些照片在发布时显示在我的收藏 View 中？我有一种感觉，我需要将 UIimage 与它们的特定时间码相匹配，然后以某种方式告诉我的 Collection View 按 unixtime 对它们进行排序。

提前致谢。

Answer 1

好吧，您不必创建文件，但这是保持文件美观整洁的好习惯。

尝试在相同的 Controller 文件中但在 Controller 定义之外或在新的 Swift 文件中。

class IGPhotoContainer  {

   var image: UIImage!
   var timestamp: String = ""   

   //Your constructor can be like this 
   init() {

   }

   //or overload it with 2 params for your convenience. 
   init(newimage: UIImage, newtime: String){

      this.image = newimage
      this.timestamp = newtime

   }

}

如果您在单独的文件中执行此操作，请记住在新文件的开头添加这行代码。

import UIKit