iOS multi-task breakpoint Download afnetworking

#import "DownLoadCell.h"

@implementation Downloadcell

-(Instancetype) Initwithstyle: (Uitableviewcellstyle) style Reuseidentifier: (NSString *) reuseidentifier{

Self = [Superinitwithstyle:style reuseidentifier:reuseidentifier];

if (self) {

_button = [Uibuttonbuttonwithtype:uibuttontypecustom];

[_buttonsettitle:@ "Start" forstate:uicontrolstatenormal];

[_buttonsettitle:@ "suspend" forstate:uicontrolstateselected];

[_button setframe:cgrectmake (200, 0, 100, 40)];

[_buttonsetbackgroundcolor:[uicolorredcolor]];

_lable = [[Uilabelalloc]initwithframe:cgrectmake (0, 0, 100, 40)];

[_lablesetbackgroundcolor:[uicolorcyancolor]];

[Self.contentviewaddsubview:_lable];

[Self.contentviewaddsubview:_button];

}

returnself;

}

@end

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#import "ViewController.h"

#import "AFNetworking.h"

#import "DownLoadCell.h"

#define KDEFAULTTAG 10

#define URL1 @ "http://124.202.164.13/mp4files/50080000058FFE30/pcdowncc.imgo.tv/a61a08d987a596161f029926d3b4e868 /5470d75f/c1/2014/dianshiju/jinpaihongniang/201410316d64dac6-10c5-43f0-8ade-fc53b0833d35.fhv.mp4 "

#define URL2 @ "http://pcdowncc.imgo.tv/c22b568e89664260ea872330ba774741/552b608f/c1/2014/dianshiju/ Jinpaihongniang/2014103198b69041-6f7a-46fd-b0b5-066937cda764.fhv.mp4 "

@interface Viewcontroller () <UITableViewDataSource,UITableViewDelegate>

{

Nsmutabledictionary *dicoperation;

Uilabel *lable;

Nsarray *downloadurllist;

NSString *downurl;

UITableView *tabview;

}

@end

@implementation Viewcontroller

-(void) Viewdidload {

[Super Viewdidload];

Downloadurllist = [[Nsarray alloc]initwithobjects:url1,url2,nil];

Cgsize size = self.view.frame.size;

Tabview = [[UITableView alloc]initwithframe:cgrectmake (0,20, Size.width, Size.Height) Style:uitableviewstyleplain];

[Tabview setdatasource:self];

[Tabview setdelegate:self];

[Self.view Addsubview:tabview];

Dicoperation = [[Nsmutabledictionary alloc]init];

}

-(UITableViewCell *) TableView: (UITableView *) TableView Cellforrowatindexpath: (Nsindexpath *) indexPath{

Downloadcell *cell = [[Downloadcell alloc]init];

[Cell.button Settag:kdefaulttag + indexpath.row];

[Cell.button addtarget:self Action: @selector (Begindown:) forcontrolevents:uicontroleventtouchupinside];

return cell;

}

-(Nsinteger) TableView: (UITableView *) TableView numberofrowsinsection: (Nsinteger) section{

return 2;

}

-(void) TableView: (UITableView *) TableView Didselectrowatindexpath: (Nsindexpath *) indexpath{

[Tabview Deselectrowatindexpath:indexpath Animated:yes];

}

-(void) Begindown: (UIButton *) sender{

int downloadtag = (int) Sender.tag-kdefaulttag;

Downurl = [Downloadurllist Objectatindex:downloadtag];

if (!sender.selected) {

[Self startdownload:downloadtag];

}else{

Afhttprequestoperation *currentop = [dicoperation objectforkey:@ (Downloadtag)];

[Currentop pause];

}

sender.selected =!sender.selected;

}

Get the downloaded file size

-(unsigned Longlong) Filesizeforpath: (NSString *) path {

Signed Longlong fileSize = 0;

Nsfilemanager *filemanager = [Nsfilemanager new]; Default is not thread safe

if ([FileManager Fileexistsatpath:path]) {

Nserror *error = nil;

Nsdictionary *filedict = [FileManager attributesofitematpath:path error:&error];

if (!error && filedict) {

FileSize = [Filedict fileSize];

}

}

return fileSize;

}

Start download

-(void) Startdownload: (int) Tag {

NSString *cachedirectory = [Nssearchpathfordirectoriesindomains (Nscachesdirectory,nsuserdomainmask, YES) OBJECTATINDEX:0];

Nsarray *arrurllist = [downurlcomponentsseparatedbystring:@ "/"];

NSString *videoname = [arrurllistobjectatindex:arrurllist.count-1];

NSString *downloadpath = [Cachedirectorystringbyappendingpathcomponent:videoname];

Nsurlrequest *request = [Nsurlrequestrequestwithurl:[nsurlurlwithstring:downurl]];

Check to see if the file has been downloaded part

unsigned longlong downloadedbytes = 0;

if ([[Nsfilemanagerdefaultmanager] fileexistsatpath:downloadpath]) {

Get the downloaded file length

Downloadedbytes = [Selffilesizeforpath:downloadpath];

if (Downloadedbytes > 0) {

Nsmutableurlrequest *mutableurlrequest = [Requestmutablecopy];

NSString *requestrange = [nsstringstringwithformat:@ "bytes=%llu-", downloadedbytes];

[Mutableurlrequest setvalue:requestrangeforhttpheaderfield:@ "Range"];

request = Mutableurlrequest;

}

}

Do not use caching to avoid problems with breakpoint continuation

[[Nsurlcachesharedurlcache] removecachedresponseforrequest:request];

Download request

Afhttprequestoperation *operation = [[Afhttprequestoperationalloc] initwithrequest:request];

Download path

Operation.outputstream = [Nsoutputstreamoutputstreamtofileatpath:downloadpath append:yes];

[Dicoperationsetobject:operation forkey:@ (tag)];

Operation.userinfo = @{@ "KEYOP": @ (TAG)};

Download Progress Callback

__weak afhttprequestoperation *MYOP = operation;

[Operation setdownloadprogressblock:^ (Nsuinteger Bytesread,long long Totalbytesread,long long Totalbytesexpectedtoread) {

Download progress

Float progress = ((float) Totalbytesread + downloadedbytes)/(Totalbytesexpectedtoread + downloadedbytes);

Nsindexpath *indexpath = [Nsindexpath indexpathforrow:[[myop.userinfo objectforkey:@ "keyOp"] intValue] inSection:0];

Downloadcell *cell = (Downloadcell *) [Tabview Cellforrowatindexpath:indexpath];

NSString *str = [nsstring stringwithformat:@ "Download%.4f", progress];

Dispatch_async (Dispatch_get_main_queue (), ^{

NSLog (@ "------------------------%d Cell downloads%@", [[Myop.userinfo objectforkey:@ "KEYOP"] intvalue],str);

[Cell.lable SETTEXT:STR];

});

}];

Success and failure callbacks

[Operation setcompletionblockwithsuccess:^ (Afhttprequestoperation *operation,id responseobject) {

Nsindexpath *indexpath = [Nsindexpath indexpathforrow:[[myop.userinfo objectforkey:@ "keyOp"] intValue] inSection:0];

Downloadcell *cell = (Downloadcell *) [Tabview Cellforrowatindexpath:indexpath];

Dispatch_async (Dispatch_get_main_queue (), ^{

[Cell.button settitle:@ "complete" forstate:uicontrolstateselected];

[Cell.button Setuserinteractionenabled:no];

[Cell.lable settext:@ "100%"];

});

} failure:^ (Afhttprequestoperation *operation, Nserror *error) {

}];

[Operation start];

}

@end