ios file manager 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"---->1.UI Prep WorkA. Defining a global nsurlsessiondownloadtask: Download management handleIt is responsible for all network operation requests. 12345 @interfaceViewController (){// 下载句柄NSURLSessionDownloadTask *_downloadTask;}

download progress. *//**[""] * @brief update progress bar, use this agent [""] *[""] * @param session session[""] * @param downloadtask download task [""] * @param byteswritten Current Write Bytes[""] * @param totalbyteswritten Current total write bytes[""] * @param totalbytesexpectedtowrite expected write total bytes[""] *[""] * @return 4. The download is compl

/self.sumlength; self.progress.progress=progress; 73 74//1.1 points receive data. NSLog (@ "received data from the server! ---%d ", data.length); 76 77//writes data to the created empty file, but cannot use WriteToFile (overwrite) 78//To move to the tail of the file [Self.writehandle Seektoendoffile]; 80//From the current moving position, write Data bayi [Self.writehandle Writedata:data]; 82} 83 84/* 85

current time and the previous second time to compare, greater than or equal to one second to calculate if ([currentdate timeIntervalSinceDate:downTask.date] >= 1) { Time difference Double Time = [currentdate timeIntervalSinceDate:downTask.date]; Calculation speed Long long speed = downtask.total/time; Turn the speed into KB or m Downtask.speed = [Downtask formatbytecount:speed]; Maintain variables, calculate cleared zeros Downtask.totalread = 0.0;

(@"Download Complete"); //writing files to the sandbox//Cache FolderNSString *caches =[Nssearchpathfordirectoriesindomains (Nscachesdirectory, Nsuserdomainmask, YES) lastobject]; //file pathNSString *file = [caches stringbyappendingpathcomponent:@"Minion_15.mp4"]; //Write Data[Self.filedata writetofile:file Atomically:yes]; Self.filedata=Nil;}- (void) conndownlo

To achieve the continuation of the breakpoint, when the pause to cancel the connection connection,To start the download, send a header message to the server, telling him how long it will take to request the data, and where to start//Pause if(Sender. Selected) { [ Self. ConnCancel];//Cancel Connection Self. Conn=Nil;//Start}Else{//Create URL Nsurl*url = [Nsurlurlwithstring:@"Http://localhost:8080/TFServer/resources/videos/minio

nsarray *documentpaths = Nssearchpathfordirectoriesindomains(nsdocumentdirectory, NSUserDomainMask ,YES); use the C function nssearchpathfordirectoriesindomains to get the full path of the directory in the sandbox. NSString * documentsDirectoryPath = [Nssearchpathfordirectoriesindomains (NSDocumentDirectory, NSUserDomainMask , YES) objectatindex:0];nsstring *ourdocumentpath =[documentpaths Objectatindex:0]; nsstring *sandboxpath = nshomedirectory (); NSString *documentpath = [Sandboxpath stri

Android calls the File Manager and returns the path of the selected file. android File Manager In actual projects, you often need to call the File Manager to select the