ios系統(tǒng)下刪除文件的代碼
更新時間：2015年05月27日 09:18:38 投稿：hebedich
本文給大家總結了幾則在IOS系統(tǒng)下刪除文件的代碼，十分的實用，有需要的小伙伴可以參考下。
方法一：這段objective c代碼用于刪除指定路徑的文件
if ([fileManager removeItemAtPath:@"FilePath" error:NULL]) {
NSLog(@"Removed successfully");
}
方法二：
NSFileManager *defaultManager; defaultManager = [NSFileManager defaultManager]; [defaultManager removeFileAtPath: tildeFilename handler: nil];
handler可以接收消息，比如如果刪除失敗，可以使用fileManager:shouldProceedAfterError: 。
方法三：
IOS 刪除文件 刪除文件夾 創(chuàng)建文件 創(chuàng)建文件夾 判斷文件存在 md5 封裝類
自己最近在使用關于數(shù)據(jù)的存取和刪除，于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
//
// 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搜數(shù)據(jù)");
}
-(void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
NSLog(@"開始結didReceiveResponse搜數(shù)據(jù)");
}
-(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]];
//創(chuàng)建目錄
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]];
//創(chuàng)建目錄
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){//本地數(shù)據(jù)
return localData;
}else{//遠程獲取數(shù)據(jù)
NSMutableData *receivedData = [self remoteFetchData:dataUrl];
if(receivedData != nil){
if([self storageDataToFile:receivedData fileName:currentDataFilePath]){
NSLog(@"保存成功");
[self removeDirectory];
}else{
NSLog(@"保存失敗");
}
}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]
];
}
//上傳圖片存儲
+(void) saveUploadImage:(UIImage *)image withName:(NSString *)imageName{
NSFileManager *fileManager = [[NSFileManager alloc] init];
NSError *error;
// 獲取沙盒目錄
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);
// 將圖片寫入文件
[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;
// 獲取沙盒目錄
NSString *fullPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
fullPath = [fullPath stringByAppendingPathComponent:@"tmpImage"];
if(![fileManager fileExistsAtPath:fullPath]){
[fileManager removeItemAtPath:fullPath error:&error];
}
}
//獲取存儲的圖片
+(NSString *)fetchUploadImagePath:(NSString *)imageName{
NSString *fullPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
fullPath = [fullPath stringByAppendingPathComponent:@"tmpImage"];
fullPath = [fullPath stringByAppendingPathComponent:imageName];
return fullPath;
}
//判斷文件是否存在
+(NSString *)isFileExists:(NSString *)fullpath{
NSFileManager *fileManager = [[NSFileManager alloc] init];
if([fileManager fileExistsAtPath:fullpath]){
return fullpath;
}
return nil;
}
//數(shù)據(jù)存儲
//+(void)
//獲取存儲文件的目錄
+(NSString *)dataPath{
//此處首先指定了圖片存取路徑（默認寫到應用程序沙盒 中）
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
//并給文件起個文件名
NSString *filePathDerectory = [paths objectAtIndex:0];
return filePathDerectory;
}
//獲取指定文件的數(shù)據(jù)
+(NSMutableData *)fromFilenamePathFetchLocalData:(NSString *)filename{
//保存數(shù)據(jù)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;
}
//存儲數(shù)據(jù)到指定文件
+(BOOL) storageDataToFile:(NSData *)data fileName:(NSString *)fileName{
//保存數(shù)據(jù)到指定文件中
NSFileManager *fileManager = [[NSFileManager alloc] init];
if([fileManager createFileAtPath:fileName contents:data attributes:nil]){
return YES;
}else{
return NO;
}
}
//刪除文件
+(void) deleteFile:(NSString *)fileName{
NSFileManager *fileManager = [[NSFileManager alloc] init];
NSError *error;
[fileManager removeItemAtPath:fileName error:&error];
}
//獲取今天的日期
+(NSString *) fetchTodayDate{
NSDate *currentDate = [NSDate date];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateStyle:NSDateFormatterMediumStyle];
return [dateFormatter stringFromDate:currentDate];
}
//獲取昨天的日期
+(NSString *) fetchYesterdayDate{
NSDate *yesterdayDate = [NSDate dateWithTimeIntervalSinceNow:-(24 * 60 * 60)];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateStyle:NSDateFormatterMediumStyle];
return [dateFormatter stringFromDate:yesterdayDate];
}
//獲取前天的日期
+(NSString *) fetchYesterdayBeforeDate{
NSDate *yesterdayDate = [NSDate dateWithTimeIntervalSinceNow:-(2 * (24 * 60 * 60))];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateStyle:NSDateFormatterMediumStyle];
return [dateFormatter stringFromDate:yesterdayDate];
}
//獲取存儲文件的數(shù)據(jù)
//創(chuàng)建文件
//創(chuàng)建目錄
+(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);
}
}
//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
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