ios系统下删除文件的代码
方法一：这段objectivec代码用于删除指定路径的文件
if([fileManagerremoveItemAtPath:@"FilePath"error:NULL]){
NSLog(@"Removedsuccessfully");
}
方法二：
NSFileManager*defaultManager; defaultManager=[NSFileManagerdefaultManager]; [defaultManagerremoveFileAtPath:tildeFilename handler:nil];
handler可以接收消息，比如如果删除失败，可以使用fileManager:shouldProceedAfterError:。
方法三：
IOS删除文件删除文件夹创建文件创建文件夹判断文件存在md5封装类
自己最近在使用关于数据的存取和删除，于是自己就写了一个包括功能的类，自己用着还是蛮方便，再次分享一下
StorageData.m
//
//StorageData.m
//xunYi7
//
//Createdbydavidon13-6-28.
//Copyright(c)2013年david.Allrightsreserved.
//
#import<CommonCrypto/CommonDigest.h>
#import"StorageData.h"
#import"xunYi7AppDelegate.h"
@implementationStorageData
-(void)connection:(NSURLConnection*)connectiondidReceiveData:(NSData*)data{
NSLog(@"开始结didReceiveData搜数据");
}
-(void)connection:(NSURLConnection*)connectiondidReceiveResponse:(NSURLResponse*)response{
NSLog(@"开始结didReceiveResponse搜数据");
}
-(void)connection:(NSURLConnection*)connectiondidFailWithError:(NSError*)error{
NSLog(@"didFailWithError");
}
-(void)connectionDidFinishLoading:(NSURLConnection*)connection{
NSLog(@"connectionDidFinishLoading");
}
+(NSMutableData*)remoteFetchData:(NSString*)dataUrl{
NSString*currentDataFilePath=[[selfdataPath]stringByAppendingPathComponent:[selffetchTodayDate]];
//创建目录
currentDataFilePath=[selfcreateDirectory:currentDataFilePath];
currentDataFilePath=[currentDataFilePathstringByAppendingPathComponent:[NSStringstringWithFormat:@"%@.plist",[selfmd5:dataUrl]]];
if([xunYi7AppDelegateisReachable]){
NSURL*url=[[NSURLalloc]initWithString:dataUrl];
NSURLRequest*request=[[NSURLRequestalloc]initWithURL:url
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60];
NSURLResponse*response=[[NSURLResponsealloc]init];
NSError*receiveDataError=[[NSErroralloc]init];
NSMutableData*receivedData=(NSMutableData*)[NSURLConnectionsendSynchronousRequest:request
returningResponse:&response
error:&receiveDataError];
[UIApplicationsharedApplication].networkActivityIndicatorVisible=NO;
returnreceivedData;
}else{
[xunYi7AppDelegateshowNetworkMessage];
}
returnnil;
}
+(NSMutableData*)localFetchData:(NSString*)dataUrl{
NSString*currentDataFilePath=[[selfdataPath]stringByAppendingPathComponent:[selffetchTodayDate]];
NSString*yesterdayDataFilePath=[[selfdataPath]stringByAppendingPathComponent:[selffetchYesterdayDate]];
//创建目录
currentDataFilePath=[selfcreateDirectory:currentDataFilePath];
currentDataFilePath=[currentDataFilePathstringByAppendingPathComponent:[NSStringstringWithFormat:@"%@.plist",[selfmd5:dataUrl]]];
yesterdayDataFilePath=[yesterdayDataFilePathstringByAppendingPathComponent:[NSStringstringWithFormat:@"%@.plist",[selfmd5:dataUrl]]];
NSMutableData*localData=[selffromFilenamePathFetchLocalData:currentDataFilePath];
if(localData!=nil){//本地数据
returnlocalData;
}else{//远程获取数据
NSMutableData*receivedData=[selfremoteFetchData:dataUrl];
if(receivedData!=nil){
if([selfstorageDataToFile:receivedDatafileName:currentDataFilePath]){
NSLog(@"保存成功");
[selfremoveDirectory];
}else{
NSLog(@"保存失败");
}
}else{
if((localData=[selffromFilenamePathFetchLocalData:yesterdayDataFilePath])!=nil){
returnlocalData;
}
}
returnreceivedData;
}
returnnil;
}
//md5加密字符串
+(NSString*)md5:(NSString*)str{
constchar*cStr=[strUTF8String];
unsignedcharresult[16];
CC_MD5(cStr,strlen(cStr),result);//Thisisthemd5call
return[NSStringstringWithFormat:
@"%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],
result[8],result[9],result[10],result[11],
result[12],result[13],result[14],result[15]
];
}
//上传图片存储
+(void)saveUploadImage:(UIImage*)imagewithName:(NSString*)imageName{
NSFileManager*fileManager=[[NSFileManageralloc]init];
NSError*error;
//获取沙盒目录
NSString*fullPath=[NSHomeDirectory()stringByAppendingPathComponent:@"Documents"];
fullPath=[fullPathstringByAppendingPathComponent:@"tmpImage"];
if(![fileManagerfileExistsAtPath:fullPath]){
[fileManagercreateDirectoryAtPath:fullPath
withIntermediateDirectories:YES
attributes:nil
error:&error];
}
fullPath=[fullPathstringByAppendingPathComponent:imageName];
NSData*imageData=UIImageJPEGRepresentation(image,0.5);
//将图片写入文件
[imageDatawriteToFile:fullPathatomically:NO];
}
//上传图片删除
+(void)removeUploadImage:(UIImage*)imagewithName:(NSString*)imageName{
NSFileManager*fileManager=[[NSFileManageralloc]init];
NSError*error;
//获取沙盒目录
NSString*fullPath=[NSHomeDirectory()stringByAppendingPathComponent:@"Documents"];
fullPath=[fullPathstringByAppendingPathComponent:@"tmpImage"];
if(![fileManagerfileExistsAtPath:fullPath]){
[fileManagerremoveItemAtPath:fullPatherror:&error];
}
}
//获取存储的图片
+(NSString*)fetchUploadImagePath:(NSString*)imageName{
NSString*fullPath=[NSHomeDirectory()stringByAppendingPathComponent:@"Documents"];
fullPath=[fullPathstringByAppendingPathComponent:@"tmpImage"];
fullPath=[fullPathstringByAppendingPathComponent:imageName];
returnfullPath;
}
//判断文件是否存在
+(NSString*)isFileExists:(NSString*)fullpath{
NSFileManager*fileManager=[[NSFileManageralloc]init];
if([fileManagerfileExistsAtPath:fullpath]){
returnfullpath;
}
returnnil;
}
//数据存储
//+(void)
//获取存储文件的目录
+(NSString*)dataPath{
//此处首先指定了图片存取路径（默认写到应用程序沙盒中）
NSArray*paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
//并给文件起个文件名
NSString*filePathDerectory=[pathsobjectAtIndex:0];
returnfilePathDerectory;
}
//获取指定文件的数据
+(NSMutableData*)fromFilenamePathFetchLocalData:(NSString*)filename{
//保存数据到指定文件中
NSFileManager*fileManager=[[NSFileManageralloc]init];
if([fileManagerfileExistsAtPath:filename]){
NSData*data=[fileManagercontentsAtPath:filename];
return[datamutableCopy];
}
returnnil;
}
//存储数据到指定文件
+(BOOL)storageDataToFile:(NSData*)datafileName:(NSString*)fileName{
//保存数据到指定文件中
NSFileManager*fileManager=[[NSFileManageralloc]init];
if([fileManagercreateFileAtPath:fileNamecontents:dataattributes:nil]){
returnYES;
}else{
returnNO;
}
}
//删除文件
+(void)deleteFile:(NSString*)fileName{
NSFileManager*fileManager=[[NSFileManageralloc]init];
NSError*error;
[fileManagerremoveItemAtPath:fileNameerror:&error];
}
//获取今天的日期
+(NSString*)fetchTodayDate{
NSDate*currentDate=[NSDatedate];
NSDateFormatter*dateFormatter=[[NSDateFormatteralloc]init];
[dateFormattersetDateStyle:NSDateFormatterMediumStyle];
return[dateFormatterstringFromDate:currentDate];
}
//获取昨天的日期
+(NSString*)fetchYesterdayDate{
NSDate*yesterdayDate=[NSDatedateWithTimeIntervalSinceNow:-(24*60*60)];
NSDateFormatter*dateFormatter=[[NSDateFormatteralloc]init];
[dateFormattersetDateStyle:NSDateFormatterMediumStyle];
return[dateFormatterstringFromDate:yesterdayDate];
}
//获取前天的日期
+(NSString*)fetchYesterdayBeforeDate{
NSDate*yesterdayDate=[NSDatedateWithTimeIntervalSinceNow:-(2*(24*60*60))];
NSDateFormatter*dateFormatter=[[NSDateFormatteralloc]init];
[dateFormattersetDateStyle:NSDateFormatterMediumStyle];
return[dateFormatterstringFromDate:yesterdayDate];
}
//获取存储文件的数据
//创建文件
//创建目录
+(NSString*)createDirectory:(NSString*)directoryName{
NSFileManager*fileManager=[[NSFileManageralloc]init];
NSError*error;
if(![fileManagerfileExistsAtPath:directoryName]){
[fileManagercreateDirectoryAtPath:directoryName
withIntermediateDirectories:YES
attributes:nil
error:&error];
if(error==nil){
returndirectoryName;
}else{
returndirectoryName;
}
}else{
returndirectoryName;
}
}
//删除文件
+(void)removeFile:(NSString*)filePath{
NSError*error;
NSFileManager*fileManager=[[NSFileManageralloc]init];
if([fileManagerfileExistsAtPath:filePath]){
[fileManagerremoveItemAtPath:filePatherror:&error];
}
if(error){
NSLog(@"error=%@",error);
}
}
//删除目录
+(void)removeDirectory{
NSArray*paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
NSString*documentsPath=[pathsobjectAtIndex:0];
NSString*removeDirectoryPath=[documentsPathstringByAppendingPathComponent:[selffetchYesterdayBeforeDate]];
NSError*error;
NSFileManager*fileManager=[[NSFileManageralloc]init];
if([fileManagerfileExistsAtPath:removeDirectoryPath]){
[fileManagerremoveItemAtPath:removeDirectoryPatherror:&error];
}
if(error){
NSLog(@"error=%@",error);
}
}
@end
StorageData.h
//
//StorageData.h
//xunYi7
//
//Createdbydavidon13-6-28.
//Copyright(c)2013年david.Allrightsreserved.
//
#import<Foundation/Foundation.h>
@interfaceStorageData:NSObject<NSURLConnectionDataDelegate,NSURLConnectionDelegate>
+(NSMutableData*)remoteFetchData:(NSString*)dataUrl;
+(NSMutableData*)localFetchData:(NSString*)dataUrl;
+(void)saveUploadImage:(UIImage*)imagewithName:(NSString*)imageName;
+(NSString*)uploadImage:(UIImage*)imagewithName:(NSString*)imageName;
+(NSString*)fetchUploadImagePath;
+(NSString*)fetchUploadImagePath:(NSString*)imageName;
+(void)removeUploadImage:(UIImage*)imagewithName:(NSString*)imageName;
+(NSString*)isFileExists:(NSString*)fullpath;
+(void)removeFile:(NSString*)filePath;
@end
有不完善的地方，希望指正和修改