FZEasyFile的使用

 

操作沙盒文件很恶心,但用上FZEasyFile就变得简单了.

以前你需要这么做才行:

NSFileManager *fileManager = [NSFileManager defaultManager];    //获取document路径,括号中属性为当前应用程序独享    NSArray *directoryPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);    NSString *documentDirectory = [directoryPaths objectAtIndex:0];    //查找文件夹，如果不存在，就创建一个文件夹    NSString *dir = [documentDirectory stringByAppendingPathComponent:@SAVEDIR];    NSLog(@"cache dir %@", dir);    if(![fileManager fileExistsAtPath:dir])    {        if(![fileManager createDirectoryAtPath:dir withIntermediateDirectories:YES attributes:nil error:nil])        {            NSLog(@"create dir:(%@) error", dir);            return;        }    }    //定义记录文件全名以及路径的字符串filePath    NSString *filePath = [dir stringByAppendingPathComponent:[[NSString alloc]initWithFormat:@"/%@", filename]];    //查找文件，如果不存在，就创建一个文件    NSData *data = [lHtml dataUsingEncoding:NSUTF8StringEncoding];    if (![fileManager fileExistsAtPath:filePath]) {        [fileManager createFileAtPath:filePath contents:data attributes:nil];    }

现在你只需要这么做:

FZEasyFile *easyFile = [FZEasyFile sharedInstance];[easyFile createFile:fileName overwrite:NO];NSOutputStream *output = [NSOutputStream outputStreamToFileAtPath:[easyFile fullFileName:fileName] append:NO];

so easy :)

 

附录:

以下为我自己修改的版本,感谢原作者的分享精神!

EasyFile.h

////  EasyFile.h//  EasyFile////  Copyright (c) 2014年 zhou jun All rights reserved.//#import 
     
      typedef enum{        /*     /Documents     /Library/Caches     /Library/Preferences     /tmp     */        DOCUMENTS = 0x99,    CACHES,    PREFERENCES,    TMP,    } EFolderFlag;@interface EasyFile : NSObject/** convert the short file name to full file name. e.g. "mycache/user/icon.png" -> "/Users/zhoujun/Library/Application Support/iPhone Simulator/7.1/Applications/ABCE2119-E864-4492-A3A9-A238ADA74BE5/Documents/mycache/user/icon.png". @return full file name. */+ (NSString *)fullFileName:(NSString *)shortFileName folderType:(EFolderFlag)type;/** create a file @param fileName fileName file path and file name, e.g. "mycache/user/icon.png". @param shouldOverwrite YES:if the file exists then overwirte it, NO:if the file exists then do nothing */+ (void)createFile:(NSString *)fileName overwrite:(BOOL)flag folderType:(EFolderFlag)type;/** test if the file exists. @param fileName file path and file name, e.g. "mycache/user/icon.png". @return YES if exists, NO otherwise. */+ (BOOL)isFileExists:(NSString *)fileName folderType:(EFolderFlag)type;@end
     

EasyFile.m

////  EasyFile.m//  EasyFile////  Copyright (c) 2014年 zhou jun All rights reserved.//#import "EasyFile.h"@implementation EasyFile+ (NSString *)fullFileName:(NSString *)shortFileName folderType:(EFolderFlag)type{    NSString *rootPath = NSHomeDirectory();        switch (type)    {        case DOCUMENTS:            rootPath = [NSHomeDirectory() stringByAppendingString:@"/Documents"];            break;                  case CACHES:            rootPath = [NSHomeDirectory() stringByAppendingString:@"/Library/Caches"];            break;                    case PREFERENCES:            rootPath = [NSHomeDirectory() stringByAppendingString:@"/Library/Preferences"];            break;                    case TMP:            rootPath = [NSHomeDirectory() stringByAppendingString:@"/tmp"];            break;                    default:            rootPath = [NSHomeDirectory() stringByAppendingString:@"/Documents"];            break;    }    NSString *file = [rootPath stringByAppendingPathComponent:shortFileName];        return file;}+ (void)createFile:(NSString *)fileName overwrite:(BOOL)flag folderType:(EFolderFlag)type{    NSFileManager *fileManager = [NSFileManager defaultManager];    NSRange lastTag = [fileName rangeOfString:@"/" options:NSBackwardsSearch];        if (lastTag.location != NSNotFound && lastTag.location != 0)    {        NSString *shortDir = [fileName substringToIndex:lastTag.location];        NSString *fullDir  = [self fullFileName:shortDir folderType:type];                if (![fileManager fileExistsAtPath:fullDir])        {            [fileManager createDirectoryAtPath:fullDir                   withIntermediateDirectories:YES                                    attributes:nil                                         error:nil];        }    }        NSString *file = [self fullFileName:fileName folderType:type];        if (flag || ![fileManager fileExistsAtPath:file])    {        BOOL suc = [fileManager createFileAtPath:file contents:nil attributes:nil];        NSLog(@"create file(%@) %@", file, suc ? @"successfully" : @"failed");    }}+ (BOOL)isFileExists:(NSString *)fileName folderType:(EFolderFlag)type{    NSFileManager *fileManager = [NSFileManager defaultManager];    NSString *file = [self fullFileName:fileName folderType:type];    return [fileManager fileExistsAtPath:file];}@end