swift Alamofire+ObjectMapper——swift(学习九)

Alamofire

Alamofire是目前为止我接触的swift最好的第三方下载库，它根本就不需要另外封装，所有的下载方法都是class func。同时呢，它提供了很多种回调的方法：

//最简单下载
Alamofire.request(.GET, "https://httpbin.org/get")
//带参数
Alamofire.request(.GET, "https://httpbin.org/get", parameters: ["foo": "bar"]).response { (request, response, data, error) in})
//URL转码
Alamofire.request(Method.GET, "https://httpbin.org/get", parameters: nil, encoding: ParameterEncoding.URL,headers: nil).responseString { (response) in

})

另外它的返回值有很多种，比如response、responseJSON、responseString等闭包。我自己最喜欢用的就是responseString。这里呢，也普及一下responseString返回对象都有哪些属性：

//response闭包,它包含返回的result与是否正确的bool状态
 print("response:- \(response)")
//请求相关的东西，打印出一个可选型的URL
 print("request:-\(response.request)")
//包含有可选型的URL、状态、请求头；请求头里有日期大小等
 print("response:-\(response.response)")
//打印出的二进制
 print("data:-\(response.data)")
//打印时间相关
 print("time:-\(response.timeline.totalDuration)")

所以我们最终需要的就只是result.value。

而有时候我们是需要返回进度的东西，有一点需要注意的是进度闭包不是在主线程的，所以要使用进度的时候要把它放到主线程里。

public func progress(closure: ((Int64, Int64, Int64) -> Void)? = nil) -> Self {}

下载还有一个经常用到的就是时间控制了，这个东西很坑的一点就是网上很多加时间限制的方法是错误的。因为时间限制是加在URLSession上的confige上的。

把以上几点综合一下，我封装了一个下载的函数：

/**下载
     *  host:是所有下载地址前面共有的域名地址，path:是请求地址,如果没有host，则只需要穿入path就可以
     *  timeout:请求限制时长
     *  params:请求要带的参数，这个可以用字典传进来，也可以手动添加在path上,用&连接
     *  completeHandle:回调闭包，返回的是一个JSONString
     *  progressHandle:进度闭包,返回一个实时进度，这个要在主线程使用进度
     */
    class func handleRequest(host:String?=nil,path:String?=nil,timeout:NSTimeInterval? = 5,params:[String: AnyObject]? = nil,completeHandle:(JSONString: String?)->Void,progressHandle:((progress:NSInteger)->Void)?=nil,cache:Bool) {

        if (host == nil)&&(path==nil) {
            return
        }

        var url:String?

        if host != nil {
            url = String.init(format:"%@?%@",host!,path!)
        }else{
            url = String.init(format:"%@",path!)
        }

        let manager = Alamofire.Manager.sharedInstance
        manager.session.configuration.timeoutIntervalForRequest = timeout!
        manager.session.configuration.timeoutIntervalForResource = timeout!

        manager.request(.GET, url!, parameters: params, encoding: ParameterEncoding.URL)
            .progress { bytesRead, totalBytesRead, totalBytesExpectedToRead in
                dispatch_async(dispatch_get_main_queue()) {
                    print("Total bytes read on main queue: \(totalBytesRead)")
                    print("Progress on main queue: \(Float(totalBytesRead) / Float(totalBytesExpectedToRead))")
                }
            }.responseString { (response) in
                /*这里的response返回的不单单是
                 */
                print("response:- \(response)")
                print("request:-\(response.request)")
                print("response:-\(response.response)")
                print("data:-\(response.data)")
                print("time:-\(response.timeline.totalDuration)")
                switch response.result{
                    case .Success:
                        completeHandle(JSONString: response.result.value)
                    case .Failure(let error):
                        print(error)
                        let controller = UIAlertController.init(title: "request faile", message: nil, preferredStyle: UIAlertControllerStyle.Alert)
                        controller.addAction(UIAlertAction.init(title: "sure", style: UIAlertActionStyle.Cancel, handler: { (action) in

                        }))
                        UIApplication.sharedApplication().keyWindow?.rootViewController?.presentViewController(controller, animated: true, completion:nil)
                }
            }
    }

ObjectMapper

聊完下载，聊解析,也是我认为最简单易用的解析库了，使用起来很简单：

//
//  TodayNewModel.swift
//  FCFTemplete
//
//  Created by 冯才凡 on 16/6/17.
//  Copyright ? 2016年 fcf. All rights reserved.
//

/*
 response:- SUCCESS: {
 "status": 1,
 "msg": "获取数据成功",
 "data": {
 "count": 4915,
 "results": [
 {
 "createdAt": "2016-06-16 14:00:01",
 "newsCreateTime": "2016-06-16",
 "newsId": "e4933aae499aa472deca09b20d39addd",
 "newsImage": "http://cc.cocimg.com/api/uploads/160616/b383a34a9861a976aed20ed9311accc0.jpg",
 "newsLink": "http://www.cocoachina.com/cms/wap.php?action=article&id=16732",
 "newsNum": 0,
 "newsSource": "伯乐在线",
 "newsTitle": "史上比较用心的纯代码实现 AutoLayout",
 "newsType": "ios",
 "newsTypeName": "iOS开发",
 "objectId": "7f221c0246",
 "updatedAt": "2016-06-16 14:00:01"
 },
 {
 "createdAt": "2016-06-16 14:00:01",
 "newsCreateTime": "2016-06-16",
 "newsId": "0bca3c1214c24ff16e954f4eeb8ef2c5",
 "newsImage": "http://cc.cocimg.com/api/uploads/160615/de1c4afd4212a4676d277ca2a36026e8.jpg",
 "newsLink": "http://www.cocoachina.com/cms/wap.php?action=article&id=16718",
 "newsNum": 0,
 "newsSource": "天狐博客 投稿",
 "newsTitle": "盘点：Xcode 8新特性",
 "newsType": "ios",
 "newsTypeName": "iOS开发",
 "objectId": "61fe963f6c",
 "updatedAt": "2016-06-16 14:00:01"
 },
 {
 "createdAt": "2016-06-16 14:00:01",
 "newsCreateTime": "2016-06-16",
 "newsId": "1b0068df2cd12aca06a56b76442105da",
 "newsImage": "http://cc.cocimg.com/api/uploads/160615/eba436de53154c3401a9e95dd9558353.jpg",
 "newsLink": "http://www.cocoachina.com/cms/wap.php?action=article&id=16719",
 "newsNum": 0,
 "newsSource": "yohunl 投稿",
 "newsTitle": "iOS日志获取和实时浏览器显示日志",
 "newsType": "ios",
 "newsTypeName": "iOS开发",
 "objectId": "88c4cae808",
 "updatedAt": "2016-06-16 14:00:01"
 },
 {
 "createdAt": "2016-06-16 14:00:01",
 "newsCreateTime": "2016-06-16",
 "newsId": "60ac53300b27af1cca2637dc4bceef8c",
 "newsImage": "http://cc.cocimg.com/api/uploads/160612/03c5cdc13d6e6454a75b01088250c122.jpg",
 "newsLink": "http://www.cocoachina.com/cms/wap.php?action=article&id=16660",
 "newsNum": 0,
 "newsSource": "西木柚子的简书",
 "newsTitle": "UIWebView保存图片",
 "newsType": "ios",
 "newsTypeName": "iOS开发",
 "objectId": "da47d66725",
 "updatedAt": "2016-06-16 14:00:01"
 },
 {
 "createdAt": "2016-06-16 14:00:02",
 "newsCreateTime": "2016-06-16",
 "newsId": "f820a89094f98a8cbc72f035dbad8eb4",
 "newsImage": "http://cc.cocimg.com/api/uploads/160615/1d0a09a33dfc82a447d65ea46ea83e7a.jpg",
 "newsLink": "http://www.cocoachina.com/cms/wap.php?action=article&id=16708",
 "newsNum": 0,
 "newsSource": "antscript 投稿",
 "newsTitle": "ASHUD——用Swift写的HUD库(OS X)",
 "newsType": "swift",
 "newsTypeName": "Swift",
 "objectId": "1cab10f595",
 "updatedAt": "2016-06-16 14:00:02"
 },
 {
 "createdAt": "2016-06-16 14:00:03",
 "newsCreateTime": "2016-06-16",
 "newsId": "68f829c79226b87a763d3e125a93df0c",
 "newsImage": "http://cc.cocimg.com/api/uploads/160616/d3ace468a57c259ff98d18c11f852b34.jpg",
 "newsLink": "http://www.cocoachina.com/cms/wap.php?action=article&id=16726",
 "newsNum": 0,
 "newsSource": "ASO100情报中心",
 "newsTitle": "开发者后台重大更新——展示量将成为衡量 ASO 重要标准",
 "newsType": "appstore",
 "newsTypeName": "App Store研究",
 "objectId": "867424f8df",
 "updatedAt": "2016-06-16 14:00:03"
 },
 {
 "createdAt": "2016-06-16 14:00:04",
 "newsCreateTime": "2016-06-16",
 "newsId": "371869ab00ecb682d432a34beef31cd7",
 "newsImage": "http://cc.cocimg.com/api/uploads/160616/0f8888e95688591c9362a484a1c5e824.jpg",
 "newsLink": "http://www.cocoachina.com/cms/wap.php?action=article&id=16725",
 "newsNum": 0,
 "newsSource": "信息与交互设计",
 "newsTitle": "如何做好陌生领域产品的交互设计",
 "newsType": "design",
 "newsTypeName": "产品设计",
 "objectId": "a8c4097b44",
 "updatedAt": "2016-06-16 14:00:04"
 },
 {
 "createdAt": "2016-06-16 14:00:06",
 "newsCreateTime": "2016-06-16",
 "newsId": "b23517b5cb2b7c92f1788304e07464c5",
 "newsImage": "http://cc.cocimg.com/api/uploads/160616/151e68ed5a2a3735321231ae602f5aed.jpg",
 "newsLink": "http://www.cocoachina.com/cms/wap.php?action=article&id=16731",
 "newsNum": 0,
 "newsSource": "IT之家",
 "newsTitle": "iOS 10开发者预览版新特性：手游也要玩直播？",
 "newsType": "apple",
 "newsTypeName": "苹果相关",
 "objectId": "7ac8b9671e",
 "updatedAt": "2016-06-16 14:00:06"
 },
 {
 "createdAt": "2016-06-16 14:00:06",
 "newsCreateTime": "2016-06-16",
 "newsId": "78a1697515d0dffa7dd1fedd6df19e0e",
 "newsImage": "http://cc.cocimg.com/api/uploads/160616/c4e5386f1f76c0f59e806a57e5f48450.jpg",
 "newsLink": "http://www.cocoachina.com/cms/wap.php?action=article&id=16730",
 "newsNum": 0,
 "newsSource": "中关村在线",
 "newsTitle": "苹果官方回应系统应用“隐藏式”卸载",
 "newsType": "apple",
 "newsTypeName": "苹果相关",
 "objectId": "9fa041383f",
 "updatedAt": "2016-06-16 14:00:06"
 },
 {
 "createdAt": "2016-06-16 14:00:06",
 "newsCreateTime": "2016-06-16",
 "newsId": "96abf9746109d279d49ddddc16f561f0",
 "newsImage": "http://cc.cocimg.com/api/uploads/160616/7ab5ce4915b918d551be2642a31f36bc.jpg",
 "newsLink": "http://www.cocoachina.com/cms/wap.php?action=article&id=16729",
 "newsNum": 0,
 "newsSource": "IT之家",
 "newsTitle": "苹果iOS10弹窗提醒用户更新非64位应用：拖慢系统性能",
 "newsType": "apple",
 "newsTypeName": "苹果相关",
 "objectId": "88fdccb8aa",
 "updatedAt": "2016-06-16 14:00:06"
 },
 {
 "createdAt": "2016-06-16 14:00:06",
 "newsCreateTime": "2016-06-16",
 "newsId": "e94c2fa2f95a2497d4dca50930340843",
 "newsImage": "http://cc.cocimg.com/api/uploads/160616/a7a04578a6486e70f7847ea9083bd814.jpg",
 "newsLink": "http://www.cocoachina.com/cms/wap.php?action=article&id=16728",
 "newsNum": 0,
 "newsSource": "中关村在线",
 "newsTitle": "传iPhone 7取消双摄像头：因技术不成熟",
 "newsType": "apple",
 "newsTypeName": "苹果相关",
 "objectId": "3b1afb96a5",
 "updatedAt": "2016-06-16 14:00:06"
 },
 {
 "createdAt": "2016-06-16 14:00:06",
 "newsCreateTime": "2016-06-16",
 "newsId": "8a8e2a3c8d31d066270c788d0333d2c4",
 "newsImage": "http://cc.cocimg.com/api/uploads/160616/b947fed1b16f91e423132ce25bea6091.jpg",
 "newsLink": "http://www.cocoachina.com/cms/wap.php?action=article&id=16727",
 "newsNum": 0,
 "newsSource": "中关村在线",
 "newsTitle": "目标年底 苹果正为Apple Watch 2采购元件",
 "newsType": "apple",
 "newsTypeName": "苹果相关",
 "objectId": "fc810e0e5e",
 "updatedAt": "2016-06-16 14:00:06"
 },
 {
 "createdAt": "2016-06-16 14:00:06",
 "newsCreateTime": "2016-06-16",
 "newsId": "facdbebd932b2eb60a88c7f54bd6b150",
 "newsImage": "http://cc.cocimg.com/api/uploads/160616/9512490536c8bf15224627821d9014a3.jpg",
 "newsLink": "http://www.cocoachina.com/cms/wap.php?action=article&id=16723",
 "newsNum": 0,
 "newsSource": "SwiftCafe",
 "newsTitle": "没有硬件发布的 WWDC 2016—macOS篇",
 "newsType": "apple",
 "newsTypeName": "苹果相关",
 "objectId": "fa0004a1c3",
 "updatedAt": "2016-06-16 14:00:06"
 },
 {
 "createdAt": "2016-06-16 14:00:06",
 "newsCreateTime": "2016-06-16",
 "newsId": "49ba128182ed0821d19bf249ee87e3a0",
 "newsImage": "http://cc.cocimg.com/api/uploads/160616/985c61b2efcd754c9d950313078912e8.jpg",
 "newsLink": "http://www.cocoachina.com/cms/wap.php?action=article&id=16722",
 "newsNum": 0,
 "newsSource": "少数派",
 "newsTitle": "想尝鲜？谈谈 iOS 10 开发者预览版体验感受",
 "newsType": "apple",
 "newsTypeName": "苹果相关",
 "objectId": "688d154eb2",
 "updatedAt": "2016-06-16 14:00:06"
 },
 {
 "createdAt": "2016-06-16 14:00:06",
 "newsCreateTime": "2016-06-16",
 "newsId": "aff01d5fb56c3a0f3b722599f9f144a1",
 "newsImage": "http://cc.cocimg.com/api/uploads/160616/9701035f5f1ff2e0e28c3585b0d58ad3.jpg",
 "newsLink": "http://www.cocoachina.com/cms/wap.php?action=article&id=16721",
 "newsNum": 0,
 "newsSource": "爱范儿",
 "newsTitle": "10 个重磅更新之外，iOS 10 还向这个设计趋势靠拢",
 "newsType": "apple",
 "newsTypeName": "苹果相关",
 "objectId": "bad7257619",
 "updatedAt": "2016-06-16 14:00:06"
 },
 {
 "createdAt": "2016-06-16 14:00:09",
 "newsCreateTime": "2016-06-16",
 "newsId": "6171059e63356d6c7fc4991f5a660ff2",
 "newsImage": "http://cc.cocimg.com/api/uploads/160615/85e61609b1e0a1a646d7da0b5abd6839.jpg",
 "newsLink": "http://www.cocoachina.com/cms/wap.php?action=article&id=16720",
 "newsNum": 0,
 "newsSource": "东京IT人",
 "newsTitle": "假如程序员生活在童话里……",
 "newsType": "programmer",
 "newsTypeName": "程序人生",
 "objectId": "f3ed350d5c",
 "updatedAt": "2016-06-16 14:00:09"
 },
 {
 "createdAt": "2016-06-16 14:00:01",
 "newsCreateTime": "2016-06-15",
 "newsId": "4103e8b24c743c7d0ae55f290537eda6",
 "newsImage": "http://cc.cocimg.com/api/uploads/160614/0327d8b3d630232d7e05893764f4decd.jpg",
 "newsLink": "http://www.cocoachina.com/cms/wap.php?action=article&id=16704",
 "newsNum": 0,
 "newsSource": "MrPeak技术分享",
 "newsTitle": "一款快速生成代码的Xcode插件FastStub",
 "newsType": "ios",
 "newsTypeName": "iOS开发",
 "objectId": "4f95a60dd0",
 "updatedAt": "2016-06-16 14:00:01"
 },
 {
 "createdAt": "2016-06-16 14:00:01",
 "newsCreateTime": "2016-06-15",
 "newsId": "830e07d1817367e098241c1269811d0d",
 "newsImage": "http://cc.cocimg.com/api/uploads/160614/a01739b78ef2642bff8ee6ce0bdc33e1.jpg",
 "newsLink": "http://www.cocoachina.com/cms/wap.php?action=article&id=16652",
 "newsNum": 0,
 "newsSource": "Bison 投稿",
 "newsTitle": "分分钟解决iOS开发中App启动广告的功能",
 "newsType": "ios",
 "newsTypeName": "iOS开发",
 "objectId": "2064c463a3",
 "updatedAt": "2016-06-16 14:00:01"
 },
 {
 "createdAt": "2016-06-16 14:00:01",
 "newsCreateTime": "2016-06-15",
 "newsId": "b0d0ad4aafb33933fcf31b01464ab84a",
 "newsImage": "http://cc.cocimg.com/api/uploads/160614/cfddce2b3de30f0d2c55d29c0cd26c95.jpg",
 "newsLink": "http://www.cocoachina.com/cms/wap.php?action=article&id=16703",
 "newsNum": 0,
 "newsSource": "SwiftCafe",
 "newsTitle": "快速上手 Core Spotlight",
 "newsType": "ios",
 "newsTypeName": "iOS开发",
 "objectId": "5f956e57b8",
 "updatedAt": "2016-06-16 14:00:01"
 },
 {
 "createdAt": "2016-06-16 14:00:01",
 "newsCreateTime": "2016-06-15",
 "newsId": "ad99486dcf16ae6f6a6e17755f620304",
 "newsImage": "http://cc.cocimg.com/api/uploads/160614/1b1ca129ad219ea729eb75d1f9be6a8d.jpg",
 "newsLink": "http://www.cocoachina.com/cms/wap.php?action=article&id=16674",
 "newsNum": 0,
 "newsSource": "汉斯哈哈哈的简书",
 "newsTitle": "YYCache源码分析（二）",
 "newsType": "ios",
 "newsTypeName": "iOS开发",
 "objectId": "f2b2618d16",
 "updatedAt": "2016-06-16 14:00:01"
 }
 ]
 }
 }

 */

import UIKit
import ObjectMapper

class resultObj: Mappable {
    var createdAt:String?
    var newsCreateTime:String?
    var newsId:String?
    var newsImage:String?
    var newsLink:String?
    var newsNum:NSNumber?
    var newsSource:String?
    var newsTitle:String?
    var newsType:String?
    var newsTypeName:String?
    var objectId:String?
    var updatedAt:String?
    required init?(_ map: Map) {
    }
    func mapping(map: Map) {
        createdAt <- map["createdAt"]
        newsCreateTime <- map["newsCreateTime"]
        newsId <- map["newsId"]
        newsImage <- map["newsImage"]
        newsLink <- map["newsLink"]
        newsNum <- map["newsNum"]
        newsSource <- map["newsSource"]
        newsTitle <- map["newsTitle"]
        newsType <- map["newsType"]
        newsTypeName <- map["newsTypeName"]
        objectId <- map["objectId"]
        updatedAt <- map["updatedAt"]
    }
}

class dataObj: Mappable {
    var count:NSNumber?
    var results:[resultObj]?
    required init?(_ map: Map) {
    }
    func mapping(map: Map) {
        count <- map["count"]
        results <- map["results"]
    }
}

class TodayNewModel: Mappable {
    var status:Int?
    var msg:String?
    var data:dataObj?
    init(){}
    required init?(_ map: Map) {
    }

    func mapping(map: Map) {
        status <- map["status"]
        msg <- map["msg"]
        data <- map["data"]
    }
}
//这里需要提示一下的是：很多网上教程说要在func mapping(map: Map)函数里加一个mapping(map)，不知道是不是我理解错的原因，但是就我这里的解析来说，在里面加mapping(map)是错误的做法，会无限递归下去的。

OK，model里大概就是这样了。那下载好了的时候，我们只需要把它们结合起来使用就可以了：

FCFBaseViewModel.handleRequest(nil, path: "http://cloud.bmob.cn/f8bb56aa119e68ee/news_list_2_0", timeout:10, params: (["limit":20,"skip":0]), completeHandle: { (returnValue) in
        print("************************************")
        print(returnValue)
        let result = Mapper<TodayNewModel>().map(returnValue)
        if let obj = result {
            let res = (obj.data?.results![0])! as resultObj
            print(res.newsTitle!)
        }
        }, progressHandle: nil, cache: false)