swift的代碼教程-ios7 網絡類(VKHttpManager)

看了很多帖子講述 NSURLSession，沒有一個講得很清楚，自己琢磨測試，封了下一個類，測試可用，直接上碼！學習勿噴。

import Foundation
import UIkit
let BOUNDARY = "----------V2ymHFg03ehbqgZCaKO6jy" //標識符

var downloadList:NSMutableArray! = NSMutableArray()
var uploadList:NSMutableArray! = NSMutableArray()

class Download{
    var downSession:NSURLSession!
    var downRequest:NSURLRequest!
    var downTask:NSURLSessionDownloadTask!
    var saveName:String!
    var isDowning:Bool!
    var callBack: ((NSURL!, NSURLResponse!, NSError!) -> Void)!
    var progressFunc:((Float!)->Void)!
    
}

class Upload{
    var upSession:NSURLSession!
    var upRequest:NSMutableURLRequest!
    var upTask:NSURLSessionUploadTask!
    var callBack:((NSData!, NSURLResponse!, NSError!) -> Void)!
    var progressFunc:((Float!)->Void)!
}

class HttpData{
    var httpDataSession:NSURLSession!
    var httpDataRequest:NSMutableURLRequest!
    var httpDataTask:NSURLSessionDataTask!
    var callBack:((NSData!, NSURLResponse!, NSError!) -> Void)!
}

class VKHttpManager:NSObject,NSURLSessionDelegate{
    
    class var manager:VKHttpManager{
            return VKHttpManager()
    }
  
    class func initDown(URL downUrl:String!,saveName:String!,progressFunc:((Float!)->Void)!,backFunc: ((NSURL!, NSURLResponse!, NSError!) -> Void)!)->Download{
        var down:Download = Download()
        down.downSession = NSURLSession(configuration: NSURLSessionConfiguration.defaultSessionConfiguration(),delegate:manager,delegateQueue:nil)
        down.downRequest = NSURLRequest(URL: NSURL(string:downUrl))
        downloadList.addObject(down)
        down.downTask = down.downSession.downloadTaskWithRequest(down.downRequest,completionHandler:backFunc)
        down.callBack = backFunc
        down.saveName = saveName
        down.progressFunc = progressFunc
        return down
    }
    
    class func startDownload(down:Download!){
        down.isDowning = true
        down.downTask.resume()
    }
    
    class func cancleDownload(down:Download!){
        down.isDowning = false
        down.downTask.cancel()
    }
    
    class func initUp(upUrl:String!,fileParam:String!,filePath:String!,keyArry:NSArray!,valueArry:NSArray!,progressFunc:((Float!)->Void)!,backFuc:((NSData!, NSURLResponse!, NSError!) -> Void)!)->Upload{
        var up = Upload()
        up.upSession = NSURLSession(configuration: NSURLSessionConfiguration.defaultSessionConfiguration(),delegate:manager,delegateQueue:NSOperationQueue.mainQueue())
        up.upRequest = NSMutableURLRequest(URL: NSURL(string:upUrl.stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding)))
        up.upRequest.HTTPMethod = "POST"
        
        var contentType = "multipart/form-data; boundary="+BOUNDARY
        up.upRequest.setValue(contentType, forHTTPHeaderField: "Content-Type")
        
        var body = NSMutableData.data()
        var fileData = NSData(contentsOfFile:filePath)
        
        if keyArry != nil && valueArry != nil && valueArry.count > 0 && keyArry.count > 0{
            for var i=0; i < keyArry.count; ++i{
                body.appendData(String("--"+BOUNDARY+"\r\n").dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true))
                body.appendData(String("Content-Disposition: form-data; name=\""+String(keyArry.objectAtIndex(i) as String)+"\"\r\n\r\n").dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true))
                body.appendData((String(valueArry.objectAtIndex(i) as String)+"\r\n").dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true))
            }
        }
        
        if fileData != nil {
            body.appendData(String("--"+BOUNDARY+"\r\n").dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true))
            body.appendData(String("Content-Disposition: form-data; name=\""+fileParam+"\"; filename=\""+filePath.lastPathComponent+"\"\r\n").dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true))
            body.appendData(String("Content-Type: application/zip\r\n\r\n").dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true))
            body.appendData(fileData)
            body.appendData(String("\r\n").dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true))
        }
        body.appendData(String("--"+BOUNDARY+"--\r\n").dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true));
        
        up.upTask = up.upSession.uploadTaskWithRequest(up.upRequest, fromData:body,completionHandler:backFuc)
        up.progressFunc = progressFunc
        up.callBack = backFuc
        uploadList.addObject(up)
        return up
    }
    
    class func startUpload(var up:Upload!){
        up.upTask.resume()
    }
    
    class func cancleUpload(var up:Upload!){
        up.upTask.cancel()
    }
    
    class func initHttpData(httpDataUrl:String!,keyArry:NSArray!,valueArry:NSArray!,backFuc:((NSData!, NSURLResponse!, NSError!) -> Void)!)->HttpData{
        var httpData = HttpData()
        httpData.httpDataSession = NSURLSession(configuration: NSURLSessionConfiguration.defaultSessionConfiguration(),delegate:manager,delegateQueue:nil)
        httpData.httpDataRequest = NSMutableURLRequest(URL: NSURL(string:httpDataUrl.stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding)))
        httpData.httpDataRequest.HTTPMethod = "POST"
        var params:String=""
        if keyArry != nil && valueArry != nil && valueArry.count > 0 && keyArry.count > 0{
            for var i=0; i < keyArry.count; ++i{
                if i == 0 {
                    params = String(keyArry.objectAtIndex(i) as String)+"="+String(valueArry.objectAtIndex(i) as String)
                }else {
                    params = params+"&"+String(keyArry.objectAtIndex(i) as String)+"="+String(valueArry.objectAtIndex(i) as String)
                }
            }
        }
        httpData.httpDataRequest.HTTPBody = params.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true)
        httpData.httpDataTask = httpData.httpDataSession.dataTaskWithRequest(httpData.httpDataRequest,completionHandler:backFuc)
        httpData.callBack = backFuc
        return httpData
    }
    
    class func startHttpData(var httpData:HttpData){
        httpData.httpDataTask.resume()
    }
    
    class func cancleHttpData(var httpData:HttpData){
        httpData.httpDataTask.cancel()
    }
    
    

//    回調 反饋
    func URLSession(session: NSURLSession!, downloadTask: NSURLSessionDownloadTask!, didWriteData bytesWritten: Int64, totalBytesWritten: Int64, totalBytesExpectedToWrite: Int64){
        var progress = Float(Float(totalBytesWritten)/Float(totalBytesExpectedToWrite));
        for var i=0; i<downloadList.count; ++i{
            var d =  downloadList[i] as Download
            d.progressFunc(progress)
        }
    }
    
    func URLSession(session: NSURLSession!, downloadTask: NSURLSessionDownloadTask!, didFinishDownloadingToURL location: NSURL!){
        println("Finish") // 下載完成
        var defaultFileMag:NSFileManager! = NSFileManager.defaultManager()
        for var i = 0 ; i<downloadList.count; ++i{
            var d =  downloadList[i] as Download
            if d.downSession == session {
                var destinationPath = NSURL(fileURLWithPath:String(FileOp.getDocumentPath()+"/"+d.saveName))
                defaultFileMag.removeItemAtURL(destinationPath,error:nil);
                var copyFile:Bool = defaultFileMag.copyItemAtURL(location,toURL:destinationPath,error:nil)
                if copyFile == false {
                    println("copyItemAtURL error")
                    return
                }
                downloadList.removeObjectAtIndex(i)
            }
        }
    }
    
    func URLSession(session: NSURLSession!, task: NSURLSessionTask!, didCompleteWithError error: NSError!){
        for var i = 0 ; i<downloadList.count; ++i{
            var d =  downloadList[i] as Download
            if d.downSession == session {
                downloadList.removeObjectAtIndex(i)
            }
        }
        
        for var i = 0 ; i<uploadList.count; ++i{
            var d =  uploadList[i] as Upload
            if d.upSession == session {
                uploadList.removeObjectAtIndex(i)
            }
        }
        println("alwaysFinish") // 不管下載錯誤和正確
        println(error)
    }

    func URLSession(session: NSURLSession!, task: NSURLSessionTask!, didSendBodyData bytesSent: Int64, totalBytesSent: Int64, totalBytesExpectedToSend: Int64){
        var progress = Float(Float(totalBytesSent)/Float(totalBytesExpectedToSend));
        for var i=0; i<uploadList.count; ++i{
            var u =  uploadList[i] as Upload
            u.progressFunc(progress)
        }
    }
    
    
}

這裏補充下調用方法，可能有些初學者看的不是很懂

 var up =  VKHttpManager.initUp("http://192.168.1.107/myphp/index/upload/",fileParam:"file",filePath:NSBundle.mainBundle().pathForResource("11", ofType: "mp3"),keyArry:nil,valueArry:nil,progressFunc:prog,backFuc:{
            data,response,error in
                println(NSString(data: data,encoding:NSUTF8StringEncoding))
            })
        VKHttpManager.startUpload(up)

func prog(p:Float!)->Void{
        println(p)
    }

 var down = VKHttpManager.initDown(URL:"http://192.168.1.107/myphp/2222.mp3",saveName:"12.jpg",progressFunc:prog,backFunc:nil)
     VKHttpManager.startDownload(down)