ios系统下删除文件的代码

 if ([fileManager removeItemAtPath:@"FilePath" error:NULL]) { NSLog(@"Removed successfully"); } 

 NSFileManager *defaultManager; defaultManager = [NSFileManager defaultManager]; [defaultManager removeFileAtPath: tildeFilename handler: nil]; 

 // // StorageData.m // xunYi7 // // Created by david on 13-6-28. // Copyright (c) 2013年 david. All rights reserved. // #import  #import "StorageData.h" #import "xunYi7AppDelegate.h" @implementation StorageData -(void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{ NSLog(@"开始结didReceiveData搜数据"); } -(void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{ NSLog(@"开始结didReceiveResponse搜数据"); } -(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]]; //创建目录 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:NSURLRequestUseProtocolCachePolicy 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]]; //创建目录 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){//本地数据 return localData; }else{//远程获取数据 NSMutableData *receivedData = [self remoteFetchData:dataUrl]; if(receivedData != nil){ if([self storageDataToFile:receivedData fileName:currentDataFilePath]){ NSLog(@"保存成功"); [self removeDirectory]; }else{ NSLog(@"保存失败"); } }else{ if((localData = [self fromFilenamePathFetchLocalData:yesterdayDataFilePath]) != nil){ return localData; } } return receivedData; } return nil; } //md5加密字符串 +(NSString *)md5:(NSString *)str{ const char *cStr = [str UTF8String]; unsigned char result[16]; CC_MD5(cStr, strlen(cStr), result); // This is the md5 call 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], 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 *)image withName:(NSString *)imageName{ NSFileManager *fileManager = [[NSFileManager alloc] init]; NSError *error; // 获取沙盒目录 NSString *fullPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]; fullPath = [fullPath stringByAppendingPathComponent:@"tmpImage"]; if(![fileManager fileExistsAtPath:fullPath]){ [fileManager createDirectoryAtPath:fullPath withIntermediateDirectories:YES attributes:nil error:&error]; } fullPath = [fullPath stringByAppendingPathComponent:imageName]; NSData *imageData = UIImageJPEGRepresentation(image, 0.5); // 将图片写入文件 [imageData writeToFile:fullPath atomically:NO]; } //上传图片删除 +(void) removeUploadImage:(UIImage *)image withName:(NSString *)imageName{ NSFileManager *fileManager = [[NSFileManager alloc] init]; NSError *error; // 获取沙盒目录 NSString *fullPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]; fullPath = [fullPath stringByAppendingPathComponent:@"tmpImage"]; if(![fileManager fileExistsAtPath:fullPath]){ [fileManager removeItemAtPath:fullPath error:&error]; } } //获取存储的图片 +(NSString *)fetchUploadImagePath:(NSString *)imageName{ NSString *fullPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]; fullPath = [fullPath stringByAppendingPathComponent:@"tmpImage"]; fullPath = [fullPath stringByAppendingPathComponent:imageName]; return fullPath; } //判断文件是否存在 +(NSString *)isFileExists:(NSString *)fullpath{ NSFileManager *fileManager = [[NSFileManager alloc] init]; if([fileManager fileExistsAtPath:fullpath]){ return fullpath; } return nil; } //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 = [paths objectAtIndex:0]; return filePathDerectory; } //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 = [[NSFileManager alloc] init]; if([fileManager fileExistsAtPath:filename]){ NSData *data = [fileManager contentsAtPath:filename]; return [data mutableCopy]; } return nil; } //存储数据到指定文件 +(BOOL) storageDataToFile:(NSData *)data fileName:(NSString *)fileName{ //保存数据到指定文件中 NSFileManager *fileManager = [[NSFileManager alloc] init]; if([fileManager createFileAtPath:fileName contents:data attributes:nil]){ return YES; }else{ return NO; } } //删除文件 +(void) deleteFile:(NSString *)fileName{ NSFileManager *fileManager = [[NSFileManager alloc] init]; NSError *error; [fileManager removeItemAtPath:fileName error:&error]; } //获取今天的日期 +(NSString *) fetchTodayDate{ NSDate *currentDate = [NSDate date]; NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateStyle:NSDateFormatterMediumStyle]; return [dateFormatter stringFromDate:currentDate]; } //获取昨天的日期 +(NSString *) fetchYesterdayDate{ NSDate *yesterdayDate = [NSDate dateWithTimeIntervalSinceNow:-(24 * 60 * 60)]; NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateStyle:NSDateFormatterMediumStyle]; return [dateFormatter stringFromDate:yesterdayDate]; } //获取前天的日期 +(NSString *) fetchYesterdayBeforeDate{ NSDate *yesterdayDate = [NSDate dateWithTimeIntervalSinceNow:-(2 * (24 * 60 * 60))]; NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateStyle:NSDateFormatterMediumStyle]; return [dateFormatter stringFromDate:yesterdayDate]; } //获取存储文件的数据 //创建文件 //创建目录 +(NSString *) createDirectory:(NSString *)directoryName{ NSFileManager *fileManager = [[NSFileManager alloc] init]; NSError *error; if(![fileManager fileExistsAtPath:directoryName]){ [fileManager createDirectoryAtPath:directoryName withIntermediateDirectories:YES attributes:nil error:&error]; if(error == nil){ return directoryName; }else{ return directoryName; } }else{ return directoryName; } } //删除文件 +(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); } } //删除目录 +(void) removeDirectory{ NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, 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年 david. All rights reserved. // #import  @interface StorageData : NSObject +(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