ios-using afnetworking3.0+ (latest AFN)-Implement file breakpoint download

0. Import Framework Preparation Work • 1. Drag and drop the afnetworking3.0+ framework program into the project ·2.  or use Cocopod to import afnetworking3.0+ 3. Introduction of #import "AFNetworking.h"

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1.UI Prep Work

A. Defining a global nsurlsessiondownloadtask: Download management handle It is responsible for all network operation requests.

1 @interface Viewcontroller () 2 {3     // Download handle 4     Nsurlsessiondownloadtask *_downloadtask; 5 }

1 . h file2 #import<UIKit/UIKit.h>3  4 @interfaceViewcontroller:uiviewcontroller5 //Download File Display6  7@property (Weak, nonatomic) Iboutlet Uiimageview *ImageView;8 //Download progress bar display9  Ten@property (Weak, nonatomic) Iboutlet Uiprogressview *Progressview; One @end A   - . m file - @interfaceViewcontroller () the { -     //Download handle -Nsurlsessiondownloadtask *_downloadtask; -}

2. Implement file download operation details with AFN

1- (void) downfilefromserver{2     3     //Remote Address4Nsurl *url = [Nsurl urlwithstring:@"Http://www.baidu.com/img/bdlogo.png"];5     //Default configuration6Nsurlsessionconfiguration *configuration =[Nsurlsessionconfiguration defaultsessionconfiguration];7     8     //afn3.0+ based on the handle of the closed urlsession9Afurlsessionmanager *manager =[[Afurlsessionmanager alloc] initwithsessionconfiguration:configuration];Ten      One     //Request ANsurlrequest *request =[Nsurlrequest Requestwithurl:url]; -      -     //Download Task Action the_downloadtask = [Manager downloadtaskwithrequest:request progress:^ (nsprogress *_nonnull downloadprogress) { -          -         //@property int64_t Totalunitcount; Total size of file to download -         //@property int64_t Completedunitcount; the size of the current download +          -         //Add monitoring KVO to progress +NSLog (@"%f",1.0* Downloadprogress.completedunitcount/downloadprogress.totalunitcount); A         //back to the home row refresh UI atDispatch_async (Dispatch_get_main_queue (), ^{ -         //set the percentage of the progress bar -   -Self.progressView.progress =1.0* Downloadprogress.completedunitcount/Downloadprogress.totalunitcount; -         }); -   in} Destination:^nsurl * _nonnull (Nsurl * _nonnull TargetPath, Nsurlresponse *_nonnull Response) { -          to         //-The return value of the block, which requires the return of a URL, which is the path to the location of the file +   -NSString *cachespath =[Nssearchpathfordirectoriesindomains (Nscachesdirectory, Nsuserdomainmask, YES) lastobject]; theNSString *path =[Cachespath stringByAppendingPathComponent:response.suggestedFilename]; *         return[Nsurl Fileurlwithpath:path]; $  Panax Notoginseng} completionhandler:^ (Nsurlresponse * _nonnull response, Nsurl * _nullable FilePath, Nserror *_nullable Error) { -         //set up the download complete operation the         //filepath is where you download files, you can unzip them, or you can use them directly . +          ANSString *imgfilepath = [FilePath path];//turn the Nsurl into NSString theUIImage *img =[UIImage Imagewithcontentsoffile:imgfilepath]; +Self.imageView.image =img; -   $     }]; $}

3. With regard to the suspension and continuation

1 -(ibaction) Stopdownloadbtnclick: (ID) sender {2     // pause Download 3     [_downloadtask suspend]; 4 }5 -(ibaction) Startdownloadbtnclick: (ID) sender {6     // Start Download 7     [_downloadtask resume]; 8 }

4. Detect network status-optimize user experience

1- (void) Viewdidload {2 [Super Viewdidload];3     4     //Network Monitor handle5Afnetworkreachabilitymanager *manager =[Afnetworkreachabilitymanager Sharedmanager];6     7     //To Monitor network connection status, you must first invoke the Startmonitoring method of the singleton8 [manager startmonitoring];9     Ten[Manager setreachabilitystatuschangeblock:^(afnetworkreachabilitystatus status) { One         //Status: A         //Afnetworkreachabilitystatusunknown =-1, Unknown -         //afnetworkreachabilitystatusnotreachable = 0, not connected -         //Afnetworkreachabilitystatusreachableviawwan = 1, 3G the         //Afnetworkreachabilitystatusreachableviawifi = 2, wireless connection -NSLog (@"%d", status); -     }]; -      +     //you are ready to download the file from remote. Click the Start button below to start the download task - [self downfilefromserver]; +   A}

Transferred from: http://www.cnblogs.com/qingche/p/5362592.html

ios-using afnetworking3.0+ (latest AFN)-Implement file breakpoint download