1.字典轉(zhuǎn)模型

// MARK: - 內(nèi)部控制方法
    private func loadData()
    {
            NetworkTools.shareInstance.loadStatuses { (array, error) -> () in
                // 1.安全校驗(yàn)
                if error != nil
                {
                    SVProgressHUD.showErrorWithStatus("獲取微博數(shù)據(jù)失敗", maskType: SVProgressHUDMaskType.Black)
                    return
                }
                guard let arr = array else
                {
                    return
                }
                
                // 2.將字典數(shù)組轉(zhuǎn)換為模型數(shù)組
                var models = [Status]()
                for dict in arr
                {
                    let status = Status(dict: dict)
                    models.append(status)
                }
                NJLog(models)
                
        }
    }



Status.swift

import UIKit

class Status: NSObject {
    /// 微博創(chuàng)建時(shí)間
    var created_at: String?
    
    /// 字符串型的微博ID
    var idstr: String?
    
    /// 微博信息內(nèi)容
    var text: String?
    
    /// 微博來源
    var source: String?
    
    /// 微博作者的用戶信息
    var user: User?
    
    init(dict: [String: AnyObject])
    {
        super.init()
        setValuesForKeysWithDictionary(dict)
    }
    
    /// KVC的setValuesForKeysWithDictionary方法內(nèi)部會(huì)調(diào)用setValue方法
    override func setValue(value: AnyObject?, forKey key: String) {
        
        NJLog("key = \(key), value = \(value)")
        // 1.攔截user賦值操作
        if key == "user"
        {
            user = User(dict: value as! [String : AnyObject])
            return
        }
        super.setValue(value, forKey: key)
    }
    override func setValue(value: AnyObject?, forUndefinedKey key: String) {
        
    }
    
    override var description: String {
        let property = ["created_at", "idstr", "text", "source"]
        let dict = dictionaryWithValuesForKeys(property)
        return "\(dict)"
    }
    
}




User.swift

import UIKit

class User: NSObject {
    /// 字符串型的用戶UID
    var idstr: String?
    
    /// 用戶昵稱
    var screen_name: String?
    
    /// 用戶頭像地址（中圖）瀑粥，50×50像素
    var profile_image_url: String?
    
    /// 用戶認(rèn)證類型
    var verified_type: Int = -1
    
    init(dict: [String: AnyObject])
    {
        super.init()
        setValuesForKeysWithDictionary(dict)
    }
    override func setValue(value: AnyObject?, forUndefinedKey key: String) {
        
    }
    
    override var description: String {
        let property = ["idstr", "screen_name", "profile_image_url", "verified_type"]
        let dict = dictionaryWithValuesForKeys(property)
        return "\(dict)"
    }

}

2.UITabelView的相關(guān)方法

extension HomeTableViewController
{
    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return self.statuses?.count ?? 0
    }
    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        // 1.取出cell
        let cell = tableView.dequeueReusableCellWithIdentifier("homeCell", forIndexPath: indexPath) as! HomeTableViewCell
        // 2.設(shè)置數(shù)據(jù)
        cell.status = statuses![indexPath.row]
        // 3.返回cell
        return cell
    }
}




HomeTableViewCell.swift
import UIKit
import SDWebImage

class HomeTableViewCell: UITableViewCell {

    /// 頭像
    @IBOutlet weak var iconImageView: UIImageView!
    /// 認(rèn)證圖標(biāo)
    @IBOutlet weak var verifiedImageView: UIImageView!
    /// 昵稱
    @IBOutlet weak var nameLabel: UILabel!
    /// 會(huì)員圖標(biāo)
    @IBOutlet weak var vipImageView: UIImageView!
    /// 時(shí)間
    @IBOutlet weak var timeLabel: UILabel!
    /// 來源
    @IBOutlet weak var sourceLabel: UILabel!
    /// 正文
    @IBOutlet weak var contentLabel: UILabel!
    
    /// 模型數(shù)據(jù)
    var status: Status?
        {
        didSet{
            // 1.設(shè)置頭像
            if let urlStr = status?.user?.profile_image_url
            {
                let url = NSURL(string: urlStr)
                iconImageView.sd_setImageWithURL(url)
            }
            // 2.設(shè)置認(rèn)證圖標(biāo)
            if let type = status?.user?.verified_type
            {
                var name = ""
                switch type
                {
                case 0:
                    name = "avatar_vip"
                case 2, 3, 5:
                    name = "avatar_enterprise_vip"
                case 220:
                    name = "avatar_grassroot"
                default:
                    name = ""
                }
                verifiedImageView.image = UIImage(named: name)
            }
            
            
            // 3.設(shè)置昵稱
            nameLabel.text = status?.user?.screen_name
            
            // 4.設(shè)置會(huì)員圖標(biāo)
            if let rank = status?.user?.mbrank
            {
                if rank >= 1 && rank <= 6
                {
                    vipImageView.image = UIImage(named: "common_icon_membership_level\(rank)")
                    nameLabel.textColor = UIColor.orangeColor()
                }else
                {
                    vipImageView.image = nil
                    nameLabel.textColor = UIColor.blackColor()
                }
                
            }
            
            // 5.設(shè)置時(shí)間
            /**
            剛剛(一分鐘內(nèi))
            X分鐘前(一小時(shí)內(nèi))
            X小時(shí)前(當(dāng)天)
            
            昨天 HH:mm(昨天)
            
            MM-dd HH:mm(一年內(nèi))
            yyyy-MM-dd HH:mm(更早期)
            */
            // "Sun Dec 06 11:10:41 +0800 2015"
            timeLabel.text = "剛剛" //status?.created_at
            if let timeStr = status?.created_at
            {
//                timeStr = "Sun Dec 05 12:10:41 +0800 2014"
                
                // 1.將服務(wù)器返回的時(shí)間格式化為NSDate
                let formatter = NSDateFormatter()
                formatter.dateFormat = "EE MM dd HH:mm:ss Z yyyy"
                // 如果不指定以下代碼, 在真機(jī)中可能無法轉(zhuǎn)換
                formatter.locale = NSLocale(localeIdentifier: "en")
                let createDate = formatter.dateFromString(timeStr)!
                
                // 創(chuàng)建一個(gè)日歷類
               let calendar = NSCalendar.currentCalendar()
                /*
                // 該方法可以獲取指定時(shí)間的組成成分 |
                let comps = calendar.components([NSCalendarUnit.Year, NSCalendarUnit.Month, NSCalendarUnit.Day], fromDate: createDate)
                NJLog(comps.year)
                NJLog(comps.month)
                NJLog(comps.day)
                */

                var result = ""
                var formatterStr = "HH:mm"
                if calendar.isDateInToday(createDate)
                {
                    // 今天
                    // 3.比較兩個(gè)時(shí)間之間的差值
                    let interval = Int(NSDate().timeIntervalSinceDate(createDate))
                    
                    if interval < 60
                    {
                        result = "剛剛"
                    }else if interval < 60 * 60
                    {
                       result = "\(interval / 60)分鐘前"
                    }else if interval < 60 * 60 * 24
                    {
                       result = "\(interval / (60 * 60))小時(shí)前"
                    }
                }else if calendar.isDateInYesterday(createDate)
                {
                    // 昨天
                    formatterStr = "昨天 " + formatterStr
                    formatter.dateFormat = formatterStr
                    result = formatter.stringFromDate(createDate)
                }else
                {
                    // 該方法可以獲取兩個(gè)時(shí)間之間的差值
                    let comps  = calendar.components(NSCalendarUnit.Year, fromDate: createDate, toDate: NSDate(), options: NSCalendarOptions(rawValue: 0))
                    if comps.year >= 1
                    {
                        // 更早時(shí)間
                        formatterStr = "yyyy-MM-dd " + formatterStr
                    }else
                    {
                        // 一年以內(nèi)
                        formatterStr = "MM-dd " + formatterStr
                    }
                    formatter.dateFormat = formatterStr
                    result = formatter.stringFromDate(createDate)
                }
                
                timeLabel.text = result
            }
            
            // 6.設(shè)置來源
            // "<a href=\"http://app.weibo.com/t/feed/2cEJdS\" rel=\"nofollow\">IT之家</a>"
            // 來自: IT之家
            if let sourceStr: NSString = status?.source where sourceStr != ""
            {
                // 6.1獲取從什么地方開始截取
                let startIndex = sourceStr.rangeOfString(">").location + 1
                // 6.2獲取截取多長的長度
                let length = sourceStr.rangeOfString("<", options: NSStringCompareOptions.BackwardsSearch).location - startIndex
                
                // 6.3截取字符串
                let rest = sourceStr.substringWithRange(NSMakeRange(startIndex, length))
                
                sourceLabel.text = "來自: " + rest
            }
            
            
            // 7.設(shè)置正文
            contentLabel.text = status?.text
            
        }
    }
    
    override func awakeFromNib() {
        super.awakeFromNib()
        // 1.設(shè)置正文最大寬度
        contentLabel.preferredMaxLayoutWidth = UIScreen.mainScreen().bounds.width - 2 * 10
    }

    
}

3.MVVM

       設(shè)置數(shù)據(jù)
        cell.viewModel = statuses![indexPath.row]
        

 // 2.將字典數(shù)組轉(zhuǎn)換為模型數(shù)組
                var models = [StatusViewModel]()
                for dict in arr
                {
                    let status = Status(dict: dict)
                    let viewModel = StatusViewModel(status: status)
                    models.append(viewModel)
                }




StatusViewModel.swift

import UIKit

/*
M: 模型(保存數(shù)據(jù))
V: 視圖(展現(xiàn)數(shù)據(jù))
C: 控制器(管理模型和視圖, 橋梁)
VM:
作用: 1.可以對M和V進(jìn)行瘦身
      2.處理業(yè)務(wù)邏輯
*/
class StatusViewModel: NSObject {
    /// 模型對象
    var status: Status
    
    init(status: Status)
    {
        self.status = status
        
        // 處理頭像
        icon_URL = NSURL(string: status.user?.profile_image_url ?? "")
        
        // 處理會(huì)員圖標(biāo)
        if status.user?.mbrank >= 1 && status.user?.mbrank <= 6
        {
            mbrankImage = UIImage(named: "common_icon_membership_level\(status.user!.mbrank)")
        }
        
        // 處理認(rèn)證圖片
        switch status.user?.verified_type ?? -1
        {
        case 0:
            verified_image = UIImage(named: "avatar_vip")
        case 2, 3, 5:
            verified_image = UIImage(named: "avatar_enterprise_vip")
        case 220:
            verified_image = UIImage(named: "avatar_grassroot")
        default:
            verified_image = nil
        }
        
        // 處理來源
        if let sourceStr: NSString = status.source where sourceStr != ""
        {
            // 6.1獲取從什么地方開始截取
            let startIndex = sourceStr.rangeOfString(">").location + 1
            // 6.2獲取截取多長的長度
            let length = sourceStr.rangeOfString("<", options: NSStringCompareOptions.BackwardsSearch).location - startIndex
            
            // 6.3截取字符串
            let rest = sourceStr.substringWithRange(NSMakeRange(startIndex, length))
            
            source_Text = "來自: " + rest
        }
        
        // 處理時(shí)間
        // "Sun Dec 06 11:10:41 +0800 2015"
        if let timeStr = status.created_at where timeStr != ""
        {
            // 1.將服務(wù)器返回的時(shí)間格式化為NSDate
            let createDate = NSDate.createDate(timeStr, formatterStr: "EE MM dd HH:mm:ss Z yyyy")
            
            // 2.生成發(fā)布微博時(shí)間對應(yīng)的字符串
            created_Time = createDate.descriptionStr()
        }

    }
    
    /// 用戶認(rèn)證圖片
    var verified_image: UIImage?
    
    /// 會(huì)員圖片
    var mbrankImage: UIImage?

    /// 用戶頭像URL地址
    var icon_URL: NSURL?
    
    /// 微博格式化之后的創(chuàng)建時(shí)間
    var created_Time: String = ""
    
    /// 微博格式化之后的來源
    var source_Text: String = ""
}





HomeTableViewCell.swift
import UIKit
import SDWebImage

class HomeTableViewCell: UITableViewCell {

    /// 頭像
    @IBOutlet weak var iconImageView: UIImageView!
    /// 認(rèn)證圖標(biāo)
    @IBOutlet weak var verifiedImageView: UIImageView!
    /// 昵稱
    @IBOutlet weak var nameLabel: UILabel!
    /// 會(huì)員圖標(biāo)
    @IBOutlet weak var vipImageView: UIImageView!
    /// 時(shí)間
    @IBOutlet weak var timeLabel: UILabel!
    /// 來源
    @IBOutlet weak var sourceLabel: UILabel!
    /// 正文
    @IBOutlet weak var contentLabel: UILabel!
    
    /// 模型數(shù)據(jù)
    var viewModel: StatusViewModel?
        {
        didSet{
            // 1.設(shè)置頭像
          
            iconImageView.sd_setImageWithURL(viewModel?.icon_URL)
            
            // 2.設(shè)置認(rèn)證圖標(biāo)
           
            verifiedImageView.image = viewModel?.verified_image
            
            // 3.設(shè)置昵稱

            nameLabel.text = viewModel?.status.user?.screen_name
            
            // 4.設(shè)置會(huì)員圖標(biāo)
            vipImageView.image = nil
            nameLabel.textColor = UIColor.blackColor()

            if let image = viewModel?.mbrankImage
            {
                vipImageView.image = image
                nameLabel.textColor = UIColor.orangeColor()
            }
            // 5.設(shè)置時(shí)間
           
            timeLabel.text = viewModel?.created_Time
            
            // 6.設(shè)置來源
            
            sourceLabel.text = viewModel?.source_Text
            
            // 7.設(shè)置正文
            contentLabel.text = viewModel?.status.text
            
        }
    }
    
    override func awakeFromNib() {
        super.awakeFromNib()
        // 1.設(shè)置正文最大寬度
        contentLabel.preferredMaxLayoutWidth = UIScreen.mainScreen().bounds.width - 2 * 10
    }

    
}

4.緩存微博圖片

 /// 緩存微博配圖
    private func cachesImages(viewModels: [StatusViewModel])
    {
        // 0.創(chuàng)建一個(gè)組
        let group = dispatch_group_create()
        
        for viewModel in viewModels
        {
            // 1.從模型中取出配圖數(shù)組
            guard let picurls = viewModel.thumbnail_pic else
            {
                 // 如果當(dāng)前微博沒有配圖就跳過, 繼續(xù)下載下一個(gè)模型的
                continue
            }
            // 2.遍歷配圖數(shù)組下載圖片
            for url in picurls
            {
                // 將當(dāng)前的下載操作添加到組中
                dispatch_group_enter(group)
                
                // 3.3利用SDWebImage下載圖片
                
                SDWebImageManager.sharedManager().downloadImageWithURL(url, options: SDWebImageOptions(rawValue: 0), progress: nil, completed: { (image, error, _, _, _) -> Void in
                    NJLog("圖片下載完成")
                    // 將當(dāng)前下載操作從組中移除
                    dispatch_group_leave(group)
                })
            }
        }
        
        // 監(jiān)聽下載操作
        dispatch_group_notify(group, dispatch_get_main_queue()) { () -> Void in
            NJLog("全部下載完成")
            self.statuses = viewModels
        }
    }

5.微博配圖

 // 9.1更新cell的尺寸
            if itemSize != CGSizeZero
            {
                flowLayout.itemSize = itemSize
            }
            // 9.2跟新collectionView尺寸
            pictureCollectionViewHeightCons.constant = clvSize.height
            pictureCollectionViewWidthCons.constant = clvSize.width


 // MARK: - 內(nèi)部控制方法
    /// 計(jì)算cell和collectionview的尺寸
    private func calculateSize() -> (CGSize, CGSize)
    {
        /*
        沒有配圖: cell = zero, collectionview = zero
        一張配圖: cell = image.size, collectionview = image.size
        四張配圖: cell = {90, 90}, collectionview = {2*w+m, 2*h+m}
        其他張配圖: cell = {90, 90}, collectionview =
        */
        let count = viewModel?.thumbnail_pic?.count ?? 0
        // 沒有配圖
        if count == 0
        {
            return (CGSizeZero, CGSizeZero)
        }
        
        // 一張配圖
        if count == 1
        {
            let key = viewModel!.thumbnail_pic!.first!.absoluteString
            // 從緩存中獲取已經(jīng)下載好的圖片, 其中key就是圖片的url
            let image = SDWebImageManager.sharedManager().imageCache.imageFromDiskCacheForKey(key)
            return (image.size, image.size)
        }
        
        let imageWidth: CGFloat = 90
        let imageHeight: CGFloat = 90
        let imageMargin: CGFloat = 10
        // 四張配圖
        if count == 4
        {
            let col = 2
            let row = col
            // 寬度 = 圖片的寬度 * 列數(shù) + (列數(shù) - 1) * 間隙
            let width = imageWidth * CGFloat(col) + CGFloat(col - 1) * imageMargin
            // 寬度 = 圖片的高度 * 行數(shù) + (行數(shù) - 1) * 間隙
            let height = imageHeight * CGFloat(row) + CGFloat(row - 1) * imageMargin
            return (CGSize(width: imageWidth, height: imageHeight), CGSize(width: width, height: height))
        }
        
        // 其他張配圖
        let col = 3
        let row = (count - 1) / 3 + 1
        // 寬度 = 圖片的寬度 * 列數(shù) + (列數(shù) - 1) * 間隙
        let width = imageWidth * CGFloat(col) + CGFloat(col - 1) * imageMargin
        // 寬度 = 圖片的高度 * 行數(shù) + (行數(shù) - 1) * 間隙
        let height = imageHeight * CGFloat(row) + CGFloat(row - 1) * imageMargin
        return (CGSize(width: imageWidth, height: imageHeight), CGSize(width: width, height: height))
        
    }

extension HomeTableViewCell: UICollectionViewDataSource
{
    func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return viewModel?.thumbnail_pic?.count ?? 0
    }
    
    func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCellWithReuseIdentifier("pictureCell", forIndexPath: indexPath) as! HomePictureCell
//        cell.backgroundColor = UIColor.redColor()
        
        cell.url = viewModel!.thumbnail_pic![indexPath.item]
        return cell
    }
}

class HomePictureCell: UICollectionViewCell {
    
    var url: NSURL?
        {
        didSet
        {
            customIconImageView.sd_setImageWithURL(url)
        }
    }
    
    @IBOutlet weak var customIconImageView: UIImageView!
    
}