Objective-C学习－查找文件

// ocStudy// main.m// // 从主目录开始，找出所有扩展名为jpg的文件的路径// Created by mark on 11-10-30.// Copyright 2011年 __MyCompanyName__. All rights reserved.// #import <Foundation/Foundation.h> int main （int argc, const char * argv[]）{     @autoreleasepool {
        NSFileManager *manger;        manger =[NSFileManager defaultManager];//建立一个文件管理器

        NSString *home;        home= [@"~" stringByExpandingTildeInPath];//～是一个代表主目录的速记符，这个方法调用是指定主目录到home
        NSMutableArray *file;        file = [NSMutableArray arrayWithCapacity: 42];//新建一个可变数组，42是随便填的，不影响数组扩展，你也可以写41，随你喜好

        for （NSString *filename in [manger enumeratorAtPath: home]）{//遍历每个文件路径，找出扩展名为jpg的文件，比起建立两个枚举器（下面注释部分）用快速枚举方法能更轻松快捷地访问数组的每个元素            if （[[filename pathExtension]                        isEqualTo: @"jpg"]） {                [file addObject: filename];            }        }        for （NSString *filename in file ） {            NSLog（@"%@", filename）;        }//        NSDirectoryEnumerator *direnum;//        direnum = [manger enumeratorAtPath: home];//        //        //        NSString *filename;//        while （filename = [direnum nextObject]） {//            if （[[filename pathExtension] isEqualTo: @"jpg"]） {//                [file addObject: filename];//            }//        }//        //        NSEnumerator *fileenum;//        fileenum = [file objectEnumerator];//        //        while （filename = [fileenum nextObject]） {//            NSLog（@"%@" , filename）;//        }

    }    return 0;}  输出如下（部分）：2011-10-30 04:45:55.104 ocStudy[309:707] Desktop/未命名_meitu_1.jpg2011-10-30 04:45:55.105 ocStudy[309:707] Desktop/软件及驱动/QQ.app/Contents/Resources/guide1.jpg2011-10-30 04:45:55.106 ocStudy[309:707] Desktop/软件及驱动/QQ.app/Contents/Resources/guide2.jpg2011-10-30 04:45:55.106 ocStudy[309:707] Desktop/软件及驱动/QQ.app/Contents/Resources/guide3.jpg2011-10-30 04:45:55.107 ocStudy[309:707] Desktop/软件及驱动/QQ.app/Contents/Resources/guide4.jpg2011-10-30 04:45:55.107 ocStudy[309:707] Desktop/软件及驱动/QQ.app/Contents/Resources/guide5.jpg2011-10-30 04:45:55.108 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F00/GKTL.jpg2011-10-30 04:45:55.108 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F00/YDFF.jpg2011-10-30 04:45:55.109 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F01/AJFW.jpg2011-10-30 04:45:55.109 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F02/PXMW.jpg2011-10-30 04:45:55.110 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F02/TBIY.jpg2011-10-30 04:45:55.110 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F05/JIJV.jpg2011-10-30 04:45:55.111 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F05/MUGA.jpg2011-10-30 04:45:55.111 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F05/NXON.jpg2011-10-30 04:45:55.112 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F06/JRWJ.jpg2011-10-30 04:45:55.112 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F06/UQTD.jpg2011-10-30 04:45:55.113 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F07/GWGQ.jpg2011-10-30 04:45:55.113 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F07/USPA.jpg