FZEasyFile的使用

FZEasyFile的使用

https://github.com/jiecao-fm/FZEasyFile

 

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 <Foundation/Foundation.h>



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