Code to delete files under IOS system _ios

method One : This section of Objective C code is used to delete the file of the specified path

if ([FileManager removeitematpath:@ "FilePath" Error:null]) {
   NSLog (@ "removed successfully");
 }

Method Two:

Nsfilemanager *defaultmanager;
Defaultmanager = [Nsfilemanager Defaultmanager];

[Defaultmanager removefileatpath:tildefilename
Handler:nil];

Handler can receive messages, such as if the deletion fails, you can use Filemanager:shouldproceedaftererror:.

Method Three:

IOS Delete File Delete folder Create file Create folder determine file exists MD5 encapsulation class

I have recently been using data access and deletion, so I wrote a functional class, their own use or quite convenient to share again

storagedata.m

STORAGEDATA.M//XUNYI7////Created by David on 13-6-28. Copyright (c) 2013 David.
All rights reserved. #import <CommonCrypto/CommonDigest.h> #import "StorageData.h" #import "XunYi7AppDelegate.h" @implementation Storagedata-(void) connection: (Nsurlconnection *) connection didreceivedata: (NSData *) data{NSLog (@ "
Start knot Didreceivedata search Data "); }-(void) connection: (Nsurlconnection *) connection didreceiveresponse: (Nsurlresponse *) response{NSLog (@ "
Start knot didreceiveresponse search Data ");

}-(void) connection: (Nsurlconnection *) connection didfailwitherror: (Nserror *) error{NSLog (@ "Didfailwitherror");

-(void) connectiondidfinishloading: (nsurlconnection *) connection{NSLog (@ "connectiondidfinishloading"); + (Nsmutabledata *) Remotefetchdata: (NSString *) dataurl{nsstring *currentdatafilepath = [[Self datapath]
  
  Stringbyappendingpathcomponent:[self Fetchtodaydate]];
  
  Create directory Currentdatafilepath = [self createdirectory:currentdatafilepath]; Currentdatafilepath = [curRentdatafilepath stringbyappendingpathcomponent:[nsstring stringwithformat:@ "%@.plist", [self md5:dataUrl]]];
    if ([Xunyi7appdelegate isreachable]) {Nsurl *url = [[Nsurl alloc] initwithstring:dataurl]; Nsurlrequest *request = [[Nsurlrequest alloc] Initwithurl:url Cachepolicy:nsurlrequestuseprotoc
    
    Olcachepolicy timeoutinterval:60];
    Nsurlresponse *response = [[Nsurlresponse alloc] init];
    
    Nserror *receivedataerror = [[Nserror alloc] init];
                                       Nsmutabledata *receiveddata = (Nsmutabledata *) [Nsurlconnection sendsynchronousrequest:request
    Returningresponse:&response error:&receivedataerror];
    
    [UIApplication sharedapplication].networkactivityindicatorvisible = NO;
  return receiveddata;
  }else{[Xunyi7appdelegate Shownetworkmessage];
return nil;
} + (Nsmutabledata *) Localfetchdata: (NSString *) dataurl{  
  NSString *currentdatafilepath = [[self datapath] stringbyappendingpathcomponent:[self fetchtodaydate]];
  
  NSString *yesterdaydatafilepath = [[self datapath] stringbyappendingpathcomponent:[self fetchyesterdaydate]];
  
  Create directory Currentdatafilepath = [self createdirectory:currentdatafilepath]; Currentdatafilepath = [Currentdatafilepath stringbyappendingpathcomponent:[nsstring stringWithFormat:@ "%@.plist", [
  Self Md5:dataurl]]]; Yesterdaydatafilepath = [Yesterdaydatafilepath stringbyappendingpathcomponent:[nsstring stringWithFormat:@%@.
  
  Plist ", [self md5:dataurl]]];
  
  Nsmutabledata *localdata = [self fromfilenamepathfetchlocaldata:currentdatafilepath];
    
  if (Localdata!= nil) {//Local data return localdata;
    
    }else{//remote FETCH data Nsmutabledata *receiveddata = [self remotefetchdata:dataurl]; if (Receiveddata!= nil) {if ([self storagedatatofile:receiveddata filename:currentdatafilepath]) {NSLog (@) is saved as
        Work ");
      [Self removedirectory]; }else{NSLog (@ "save Failed"); }}else{if (Localdata = [self Fromfilenamepathfetchlocaldata:yesterdaydatafilepath])!= nil) {return lo
      Caldata;
  } return receiveddata;
return nil;
  //MD5 Encrypted string + (NSString *) MD5: (NSString *) str{const char *CSTR = [Str utf8string];
  unsigned char result[16]; CC_MD5 (CStr, strlen (CStr), result); This is the MD5 called return [NSString stringWithFormat: @ "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x% 02x%02x%02x ", Result[0], result[1], result[2], result[3], result[4], result[5], result[6], result[7], re 
SULT[8], result[9], result[10], result[11], result[12], result[13], result[14], result[15]; //Upload picture storage + (void) Saveuploadimage: (UIImage *) image withname: (NSString *) imagename{nsfilemanager = [[*filemanager
  Emanager alloc] init];
  
  Nserror *error;
  Get the sandbox directory nsstring *fullpath = [Nshomedirectory () stringbyappendingpathcomponent:@ "Documents"]; FullPath = [FullPath stringbyappendingpathcomponent:@ "Tmpimage"]; if (![ FileManager Fileexistsatpath:fullpath]) {[FileManager Createdirectoryatpath:fullpath WithIntermediateDirectori
  Es:yes Attributes:nil error:&error];
  } fullpath = [FullPath stringbyappendingpathcomponent:imagename];
  
  NSData *imagedata = uiimagejpegrepresentation (image, 0.5);
Write the picture to the file [ImageData Writetofile:fullpath Atomically:no]; //Upload picture deletion + (void) Removeuploadimage: (UIImage *) image withname: (NSString *) imagename{nsfilemanager = [[NS
  FileManager alloc] init];
  
  Nserror *error;
  Get the sandbox directory nsstring *fullpath = [Nshomedirectory () stringbyappendingpathcomponent:@ "Documents"];
  FullPath = [FullPath stringbyappendingpathcomponent:@ "Tmpimage"]; if (![
  FileManager Fileexistsatpath:fullpath]) {[FileManager Removeitematpath:fullpath error:&error]; }//Get stored picture + (NSString *) Fetchuploadimagepath: (NSString *) imagename{nsstring *fullPath = [Nshomedirectory () stringbyappendingpathcomponent:@ "Documents"];
  FullPath = [FullPath stringbyappendingpathcomponent:@ "Tmpimage"];
  FullPath = [FullPath stringbyappendingpathcomponent:imagename];
return fullpath; 
  //Determine if the file exists + (NSString *) isfileexists: (NSString *) fullpath{Nsfilemanager *filemanager = [[Nsfilemanager alloc] init];
  if ([FileManager Fileexistsatpath:fullpath]) {return fullpath;
return nil; }//Data storage//+ (void)//Get directory of stored files + (NSString *) datapath{//Here first specify the image access path (default write to Application sandbox) Nsarray *paths = nssearchpathfor
  
  Directoriesindomains (Nsdocumentdirectory,nsuserdomainmask, YES);
  
  and give the file a filename nsstring *filepathderectory = [Paths objectatindex:0];
return filepathderectory; //Get the data of the specified file + (Nsmutabledata *) Fromfilenamepathfetchlocaldata: (NSString *) filename{//Save the data to the specified file Nsfilemanager *file
  Manager = [[Nsfilemanager alloc] init];
    if ([FileManager Fileexistsatpath:filename]) {NSData *data = [FileManager contentsatpath:filename]; RetUrn [data mutablecopy];
return nil; ///Store data to specified file + (BOOL) Storagedatatofile: (NSData *) data fileName: (NSString *) filename{//Save data to specified file Nsfilemanager *fil
  Emanager = [[Nsfilemanager alloc] init];
  if ([FileManager createfileatpath:filename contents:data Attributes:nil]) {return YES;
  }else{return NO;
  }//delete file + (void) DeleteFile: (NSString *) filename{Nsfilemanager *filemanager = [[Nsfilemanager alloc] init];
  Nserror *error;
[FileManager removeitematpath:filename error:&error];
  //Get today's Date + (NSString *) fetchtodaydate{nsdate *currentdate = [NSDate Date];
  NSDateFormatter *dateformatter = [[NSDateFormatter alloc] init];
  [Dateformatter Setdatestyle:nsdateformattermediumstyle];
return [Dateformatter stringfromdate:currentdate]; //Get yesterday's Date + (NSString *) fetchyesterdaydate{nsdate *yesterdaydate = [NSDate datewithtimeintervalsincenow:-(24 * 60 *
  60)];
  NSDateFormatter *dateformatter = [[NSDateFormatter alloc] init]; [Dateformatter SetdatestYle:nsdateformattermediumstyle];
return [Dateformatter stringfromdate:yesterdaydate]; //Get the day before yesterday + (NSString *) fetchyesterdaybeforedate{nsdate *yesterdaydate = [NSDate datewithtimeintervalsincenow:-(2 *
  (24 * 60 * 60))];
  NSDateFormatter *dateformatter = [[NSDateFormatter alloc] init];
  [Dateformatter Setdatestyle:nsdateformattermediumstyle];
return [Dateformatter stringfromdate:yesterdaydate]; //Get data to store files//Create files//create directories + (NSString *) CreateDirectory: (NSString *) directoryname{Nsfilemanager *filemanager = [[N
  Sfilemanager alloc] init];
  Nserror *error; if (![ FileManager Fileexistsatpath:directoryname]) {[FileManager createdirectoryatpath:directoryname WithIntermediat
    Edirectories:yes Attributes:nil error:&error];
    if (Error = = nil) {return directoryname;
    }else{return directoryname;
  }}else{return directoryname;
  
  }//delete file + (void) RemoveFile: (NSString *) filepath{nserror *error; NsFileManager *filemanager = [[Nsfilemanager alloc] init];
  if ([FileManager Fileexistsatpath:filepath]) {[FileManager Removeitematpath:filepath error:&error];
  } if (Error) {NSLog (@ "error =%@", error); }//delete directory + (void) removedirectory{Nsarray *paths = Nssearchpathfordirectoriesindomains (NSDocumentDirectory, NSUserDom
  Ainmask, YES);
  NSString *documentspath = [Paths objectatindex:0];
  NSString *removedirectorypath = [Documentspath stringbyappendingpathcomponent:[self fetchYesterdayBeforeDate]];
  
  Nserror *error;
  Nsfilemanager *filemanager = [[Nsfilemanager alloc] init]; if ([FileManager Fileexistsatpath:removedirectorypath]) {[FileManager Removeitematpath:removedirectorypath error:
  &error];
  } if (Error) {NSLog (@ "error =%@", error);
} @end StorageData.h///STORAGEDATA.H//XUNYI7///Created by David on 13-6-28. Copyright (c) 2013 David.
All rights reserved. #import <Foundation/Foundation.h> @interface Storagedata:nsobjEct<nsurlconnectiondatadelegate, nsurlconnectiondelegate> + (Nsmutabledata *) Remotefetchdata: (NSString *)
Dataurl;
+ (Nsmutabledata *) Localfetchdata: (NSString *) Dataurl;
+ (void) Saveuploadimage: (UIImage *) image withname: (NSString *) imagename;
+ (NSString *) Uploadimage: (UIImage *) image withname: (NSString *) imagename;
+ (NSString *) Fetchuploadimagepath;
+ (NSString *) Fetchuploadimagepath: (NSString *) imagename;
+ (void) Removeuploadimage: (UIImage *) image withname: (NSString *) imagename;
+ (NSString *) isfileexists: (NSString *) FullPath;
+ (void) RemoveFile: (NSString *) FilePath;

 @end

There are imperfections where you want to correct and modify