ios系統下刪除檔案的代碼

 　　本文給大家總結了幾則在IOS系統下刪除檔案的代碼，十分的實用，有需要的小夥伴可以參考下。

　　方法一：這段objective c代碼用於刪除指定路徑的檔案

　　?

1 2 3

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

　　方法二：

　　?

1 2 3 4 5

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

　　handler可以接收訊息，比如如果刪除失敗，可以使用fileManager:shouldProceedAfterError: 。

　　方法三：

　　IOS 刪除檔案 刪除檔案夾 建立檔案 建立檔案夾 判斷檔案存在 md5 封裝類

　　自己最近在使用關於資料的存取和刪除，於是自己就寫了一個包括功能的類，自己用著還是蠻方便，再次分享一下

　　StorageData.m

　　?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305

// // StorageData.m // xunYi7 // // Created by david on 13-6-28. // Copyright (c) 2013年 david. All rights reserved. //   #import <CommonCrypto/CommonDigest.h> #import "StorageData.h" #import "xunYi7AppDelegate.h"   @implementation StorageData   -(void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{ NSLog(@"開始結didReceiveData搜資料"); }   -(void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{ NSLog(@"開始結didReceiveResponse搜資料"); }   -(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]];   //建立目錄 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]];   //建立目錄 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){//本機資料 return localData;   }else{//遠程擷取資料   NSMutableData *receivedData = [self remoteFetchData:dataUrl];   if(receivedData != nil){ if([self storageDataToFile:receivedData fileName:currentDataFilePath]){ NSLog(@"儲存成功"); [self removeDirectory]; }else{ NSLog(@"儲存失敗"); } }else{ if((localData = [self fromFilenamePathFetchLocalData:yesterdayDataFilePath]) != nil){ return localData; } } return receivedData; } return nil; }   //md5加密字串 +(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] ]; } //上傳圖片儲存 +(void) saveUploadImage:(UIImage *)image withName:(NSString *)imageName{ NSFileManager *fileManager = [[NSFileManager alloc] init]; NSError *error;   // 擷取沙箱目錄 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);   // 將圖片寫入檔案 [imageData writeToFile:fullPath atomically:NO]; }   //上傳圖片刪除 +(void) removeUploadImage:(UIImage *)image withName:(NSString *)imageName{ NSFileManager *fileManager = [[NSFileManager alloc] init]; NSError *error;   // 擷取沙箱目錄 NSString *fullPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]; fullPath = [fullPath stringByAppendingPathComponent:@"tmpImage"]; if(![fileManager fileExistsAtPath:fullPath]){ [fileManager removeItemAtPath:fullPath error:&error]; } }   //擷取儲存的圖片 +(NSString *)fetchUploadImagePath:(NSString *)imageName{ NSString *fullPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]; fullPath = [fullPath stringByAppendingPathComponent:@"tmpImage"]; fullPath = [fullPath stringByAppendingPathComponent:imageName]; return fullPath; }   //判斷檔案是否存在 +(NSString *)isFileExists:(NSString *)fullpath{ NSFileManager *fileManager = [[NSFileManager alloc] init]; if([fileManager fileExistsAtPath:fullpath]){ return fullpath; } return nil; }   //資料存放區 //+(void)   //擷取隱藏檔的目錄 +(NSString *)dataPath{ //此處首先指定了圖片存取路徑（預設寫到應用程式沙箱 中） NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);   //並給檔案起個檔案名稱 NSString *filePathDerectory = [paths objectAtIndex:0];   return filePathDerectory; }   //擷取指定檔案的資料 +(NSMutableData *)fromFilenamePathFetchLocalData:(NSString *)filename{ //儲存資料到指定檔案中 NSFileManager *fileManager = [[NSFileManager alloc] init]; if([fileManager fileExistsAtPath:filename]){ NSData *data = [fileManager contentsAtPath:filename]; return [data mutableCopy]; }   return nil; }   //儲存資料到指定檔案 +(BOOL) storageDataToFile:(NSData *)data fileName:(NSString *)fileName{ //儲存資料到指定檔案中 NSFileManager *fileManager = [[NSFileManager alloc] init]; if([fileManager createFileAtPath:fileName contents:data attributes:nil]){ return YES; }else{ return NO; } }   //刪除檔案 +(void) deleteFile:(NSString *)fileName{ NSFileManager *fileManager = [[NSFileManager alloc] init]; NSError *error; [fileManager removeItemAtPath:fileName error:&error]; }   //擷取今天的日期 +(NSString *) fetchTodayDate{ NSDate *currentDate = [NSDate date]; NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateStyle:NSDateFormatterMediumStyle]; return [dateFormatter stringFromDate:currentDate]; }   //擷取昨天的日期 +(NSString *) fetchYesterdayDate{ NSDate *yesterdayDate = [NSDate dateWithTimeIntervalSinceNow:-(24 * 60 * 60)]; NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateStyle:NSDateFormatterMediumStyle]; return [dateFormatter stringFromDate:yesterdayDate]; }   //擷取前天的日期 +(NSString *) fetchYesterdayBeforeDate{ NSDate *yesterdayDate = [NSDate dateWithTimeIntervalSinceNow:-(2 * (24 * 60 * 60))]; NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateStyle:NSDateFormatterMediumStyle]; return [dateFormatter stringFromDate:yesterdayDate]; }   //擷取隱藏檔的資料   //建立檔案   //建立目錄 +(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; } } //刪除檔案 +(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); } }   //刪除目錄 +(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 <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

　　有不完善的地方，希望指正和修改