IOS文件名称管理工具类

//

//
//  LGFileManager.m
//  FileNameDemo
//
//  Created by li.gang on 14-4-23.
//  Copyright (c) 2014年 LG. All rights reserved.
//

#import "LGFileManager.h"

@implementation LGFileManager


//返回数据库在沙盒中的路径
+ (NSString *)getPath
{
    NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory
                                                       , NSUserDomainMask
                                                       , YES);
    NSString *path = [paths objectAtIndex:0];
    return path;
}

//传入文件a.png,如果documents/tmp里面有此文件名 那就自动生成a(1).png a(2).png a(3).png......
+ (NSString *)getSaveName:(NSString *)name{
    
    NSString *path = [self getPath];
    NSFileManager * fileManager = [NSFileManager defaultManager];
    NSArray * tempFileList = [[NSArray alloc] initWithArray:[fileManager contentsOfDirectoryAtPath:path error:nil]];
    NSString *Qname = [[name componentsSeparatedByString:@"."] objectAtIndex:0];
    
    //拿到同名的文件
    NSMutableArray *mutArrName = [NSMutableArray array];
    for (NSString *s in tempFileList) {
        if ([s rangeOfString:Qname].location !=NSNotFound){
            [mutArrName addObject:s];
        }
    }
    
    //如果没有同名的直接 直接返回name a.png
    if (mutArrName.count == 0) return name;
    
    if (mutArrName.count == 1) {
        //如果有一个文件 还需要判断是不是a.png 是就返回a(1).png
        if ([name isEqualToString:[mutArrName objectAtIndex:0]]) {
            return [NSString stringWithFormat:@"%@(1).png",[[name componentsSeparatedByString:@"."] objectAtIndex:0]];//返回a(1).png
        }else{
            return name;//返回a.png
        }
    }else{
        
        int k = 0;//有多个文件 首先判断有没有a.png  k=0是没有 k=1是有
        NSMutableArray *mutArrNum = [NSMutableArray array];//存放增加的数字字符串
        for (NSString *s in  mutArrName) {
            if ([s isEqualToString:name]) {
                k = 1;
            }
            
            if ([s rangeOfString:@"("].location !=NSNotFound) {
                NSString *num = [[[[s componentsSeparatedByString:@"("] objectAtIndex:1] componentsSeparatedByString:@")"] objectAtIndex:0];
                [mutArrNum addObject:num];
            }
        }
        
        if (k == 0) {
            return name;//返回a.png
        }
        
        for (int i=1; i <= mutArrNum.count+1; i++) {
            int j = 0;
            
            for (NSString *s in mutArrNum) {
                if (i == [s integerValue]) {
                    j = 1;
                }
            }
            
            if (j == 0) {
                return [NSString stringWithFormat:@"%@(%d).png",[[name componentsSeparatedByString:@"."] objectAtIndex:0],i];//返回a(i).png
            }
            
        }
        
    }
    
    return name;
}


+ (void)saveVideoData:(NSData *)data filePath:(NSString *)urlString
{
    
    
    NSString * getName = [self getSaveName:urlString];

    
    //初始化Documents路径
    NSString *path = [[self getPath]
                      stringByAppendingPathComponent:@""];
    NSString *name = [NSString stringWithFormat:@"/%@",getName];
    //初始化文件路径
    NSString *fileName=[path stringByAppendingPathComponent:name];
    
    //判断temp文件夹是否存在
    NSFileManager *fileManager = [NSFileManager defaultManager];
    BOOL fileExists = [fileManager fileExistsAtPath:path];
    if (!fileExists) {//如果不存在说创建,因为下载时,不会自动创建文件夹
        
        [fileManager createDirectoryAtPath:path
               withIntermediateDirectories:YES
                                attributes:nil
                                     error:nil];
    }
    if ([data writeToFile:fileName atomically:YES]) {
        NSLog(@">>write ok.");
    }
}




@end

Demo下载地址：http://download.csdn.net/download/conslee/7237547

IOS文件名称管理工具类,,5-wow.com