iosシステムでファイルのコードを削除します。
方法1：この段のobjective cコードは指定されたパスのファイルを削除するために使用されます。
方法三：
IOSファイル削除フォルダ作成ファイル作成フォルダ判定ファイル存在md 5パッケージクラス
自分は最近データのアクセスと削除を使っていますので、自分で機能を含めた種類を書きました。自分で使うのはやはり便利です。もう一度共有してみます。
StrageData.m
if ([fileManager removeItemAtPath:@"FilePath" error:NULL]) {
NSLog(@"Removed successfully");
}
NSFileManager *defaultManager;
defaultManager = [NSFileManager defaultManager];
[defaultManager removeFileAtPath: tildeFilename
handler: nil];
方法三：
IOSファイル削除フォルダ作成ファイル作成フォルダ判定ファイル存在md 5パッケージクラス
自分は最近データのアクセスと削除を使っていますので、自分で機能を含めた種類を書きました。自分で使うのはやはり便利です。もう一度共有してみます。
StrageData.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(@" didReceiveData ");
}
-(void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
NSLog(@" didReceiveResponse ");
}
-(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]];
//
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]];
//
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){//
return localData;
}else{//
NSMutableData *receivedData = [self remoteFetchData:dataUrl];
if(receivedData != nil){
if([self storageDataToFile:receivedData fileName:currentDataFilePath]){
NSLog(@" ");
[self removeDirectory];
}else{
NSLog(@" ");
}
}else{
if((localData = [self fromFilenamePathFetchLocalData:yesterdayDataFilePath]) != nil){
return localData;
}
}
return receivedData;
}
return nil;
}
//md5
+(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]
];
}
//
+(void) saveUploadImage:(UIImage *)image withName:(NSString *)imageName{
NSFileManager *fileManager = [[NSFileManager alloc] init];
NSError *error;
//
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);
//
[imageData writeToFile:fullPath atomically:NO];
}
//
+(void) removeUploadImage:(UIImage *)image withName:(NSString *)imageName{
NSFileManager *fileManager = [[NSFileManager alloc] init];
NSError *error;
//
NSString *fullPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
fullPath = [fullPath stringByAppendingPathComponent:@"tmpImage"];
if(![fileManager fileExistsAtPath:fullPath]){
[fileManager removeItemAtPath:fullPath error:&error];
}
}
//
+(NSString *)fetchUploadImagePath:(NSString *)imageName{
NSString *fullPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
fullPath = [fullPath stringByAppendingPathComponent:@"tmpImage"];
fullPath = [fullPath stringByAppendingPathComponent:imageName];
return fullPath;
}
//
+(NSString *)isFileExists:(NSString *)fullpath{
NSFileManager *fileManager = [[NSFileManager alloc] init];
if([fileManager fileExistsAtPath:fullpath]){
return fullpath;
}
return nil;
}
//
//+(void)
//
+(NSString *)dataPath{
// （ ）
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
//
NSString *filePathDerectory = [paths objectAtIndex:0];
return filePathDerectory;
}
//
+(NSMutableData *)fromFilenamePathFetchLocalData:(NSString *)filename{
//
NSFileManager *fileManager = [[NSFileManager alloc] init];
if([fileManager fileExistsAtPath:filename]){
NSData *data = [fileManager contentsAtPath:filename];
return [data mutableCopy];
}
return nil;
}
//
+(BOOL) storageDataToFile:(NSData *)data fileName:(NSString *)fileName{
//
NSFileManager *fileManager = [[NSFileManager alloc] init];
if([fileManager createFileAtPath:fileName contents:data attributes:nil]){
return YES;
}else{
return NO;
}
}
//
+(void) deleteFile:(NSString *)fileName{
NSFileManager *fileManager = [[NSFileManager alloc] init];
NSError *error;
[fileManager removeItemAtPath:fileName error:&error];
}
//
+(NSString *) fetchTodayDate{
NSDate *currentDate = [NSDate date];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateStyle:NSDateFormatterMediumStyle];
return [dateFormatter stringFromDate:currentDate];
}
//
+(NSString *) fetchYesterdayDate{
NSDate *yesterdayDate = [NSDate dateWithTimeIntervalSinceNow:-(24 * 60 * 60)];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateStyle:NSDateFormatterMediumStyle];
return [dateFormatter stringFromDate:yesterdayDate];
}
//
+(NSString *) fetchYesterdayBeforeDate{
NSDate *yesterdayDate = [NSDate dateWithTimeIntervalSinceNow:-(2 * (24 * 60 * 60))];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateStyle:NSDateFormatterMediumStyle];
return [dateFormatter stringFromDate:yesterdayDate];
}
//
//
//
+(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;
}
}
//
+(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);
}
}
//
+(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 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