//

//  main.m

//  读取指定目录下的文件列表

//

//  Created by Apple on 15/11/24.

//  Copyright © 2015年 Apple. All rights reserved.

//

/*

 *读取指定目录下的文件列表

 */

#import <Foundation/Foundation.h>

void myQuickMethod();

int main(int argc, const char * argv[]) {

    //文件操作对象

    NSFileManager *manager = [NSFileManager defaultManager];

    //文件夹路径

    NSString *home = [@"~" stringByExpandingTildeInPath];//根目录文件夹

    //目录迭代器

    NSDirectoryEnumerator *direnum = [manager enumeratorAtPath:home];

    //新建数组，存放各个文件路径

    NSMutableArray *files = [NSMutableArray arrayWithCapacity:];

    //遍历目录迭代器，获取各个文件路径

    NSString *filename;

    while (filename = [direnum nextObject]) {

        if ([[filename pathExtension] isEqualTo:@"jpg"]) {//筛选出文件后缀名是jpg的文件

            [files addObject:filename];

        }

    }

     NSLog(@"%lu",[files count]);

    //遍历数组，输出列表

    NSEnumerator *enume = [files objectEnumerator];

    while (filename = [enume nextObject]) {

        NSLog(@"%@",filename);

    }

    //myQuickMethod();

    return ;

}

//使用快速枚举来实现

void myQuickMethod(){

    //文件操作对象

    NSFileManager *manager = [NSFileManager defaultManager];

    //所查找文件夹的路径

    NSString *home = [@"~" stringByExpandingTildeInPath];

    //目录迭代器

    NSDirectoryEnumerator *direnum = [manager enumeratorAtPath:home];

    //快速枚举

    NSMutableArray *files = [NSMutableArray arrayWithCapacity:];

    for (NSString *filename in direnum) {

        if ([[filename pathExtension] isEqualTo:@"jpg"]) {

            [files addObject:filename];

        }

    }

    NSLog(@"%lu",[files count]);

    //快速枚举，输出结果

    for (NSString *filename in files) {

        NSLog(@"%@",filename);

    }

}