Swift Network Development-get Resposne before Downloadtask is complete

Original blog, reproduced please indicate the source
Blog.csdn.net/hello_hwc

This is a question for three O to answer on StackOverflow today, write a blog here, convenient for people who meet the same problem

Principle:

1. Get response with Datatask, and convert Datatask to downloadtask-corresponding agent functiondidReceiveResponse
2. After turning into Downloadtask, the downloadtask-corresponding agent function is starteddidBecomeDownloadTask
3. After the download is complete, save the file-corresponding agent functiondidFinishDownloadingToURL

Attention:

• Demo does not handle error
• Demo does not write the section of the breakpoint to continue the transmission

These before me in the Network Development section to speak very clearly, does not understand can look for my previous blog
Or check out my iOS SDK for a detailed column.

Http://blog.csdn.net/column/manage.html?alias=huangwenchen-ios-sdk

Full code
Create a single view of the Swift project, copy the following code, you can see the effect.

ImportUikitclass Viewcontroller:uiviewcontroller,nsurlsessiondelegate,nsurlsessiondatadelegate, nsurlsessiondownloaddelegate{varSession:nsurlsession?    varDatatask:nsurlsessiondatatask?     LetUrl=Nsurl (string:"Http://www.zastavki.com/pictures/originals/2013/Photoshop_Image_of_the_horse_053857_.jpg")!    varInfodic=Nsmutabledictionary () override Func Viewdidload () {Super.Viewdidload () LetConfiguration=Nsurlsessionconfiguration.Defaultsessionconfiguration () LetManqueue=Nsoperationqueue.Mainqueue () session=Nsurlsession (Configuration:configuration, delegate: Self, Delegatequeue:manqueue) Datatask=Session?.Datataskwithrequest (Nsurlrequest (url:url)) Datatask?.Resume ()} func urlsession (Session:nsurlsession, Datatask:nsurlsessiondatatask, Didreceiveresponse Response:nsurl Response, Completionhandler: (nsurlsessionresponsedisposition) -Void) {NSLog ("%@", response.Description) Completionhandler (nsurlsessionresponsedisposition.becomedownload)} func urlsession (Session:nsurlsession, Datatask:nsurlsessiondatatask, Didbecomedownloadtask downl Oadtask:nsurlsessiondownloadtask) {Downloadtask.Resume ()} func urlsession (Session:nsurlsession, Downloadtask:nsurlsessiondownloadtask, Didfinishdownloadingtourl Location:nsurl) {NSLog ("%@", location);//get ResponseNSLog ("%@", Downloadtask.Response!.Description)}}

Swift Network Development-get Resposne before Downloadtask is complete