Objective-C学习－查找文件

最新推荐文章于 2019-04-25 16:37:48 发布

转载最新推荐文章于 2019-04-25 16:37:48 发布 · 512 阅读

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#文件管理器 #file #扩展

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// 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.

#import

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.jpg

2011-10-30 04:45:55.105 ocStudy[309:707] Desktop/软件及驱动/QQ.app/Contents/Resources/guide1.jpg

2011-10-30 04:45:55.106 ocStudy[309:707] Desktop/软件及驱动/QQ.app/Contents/Resources/guide2.jpg

2011-10-30 04:45:55.106 ocStudy[309:707] Desktop/软件及驱动/QQ.app/Contents/Resources/guide3.jpg

2011-10-30 04:45:55.107 ocStudy[309:707] Desktop/软件及驱动/QQ.app/Contents/Resources/guide4.jpg

2011-10-30 04:45:55.107 ocStudy[309:707] Desktop/软件及驱动/QQ.app/Contents/Resources/guide5.jpg

2011-10-30 04:45:55.108 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F00/GKTL.jpg

2011-10-30 04:45:55.108 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F00/YDFF.jpg

2011-10-30 04:45:55.109 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F01/AJFW.jpg

2011-10-30 04:45:55.109 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F02/PXMW.jpg

2011-10-30 04:45:55.110 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F02/TBIY.jpg

2011-10-30 04:45:55.110 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F05/JIJV.jpg

2011-10-30 04:45:55.111 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F05/MUGA.jpg

2011-10-30 04:45:55.111 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F05/NXON.jpg

2011-10-30 04:45:55.112 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F06/JRWJ.jpg

2011-10-30 04:45:55.112 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F06/UQTD.jpg

2011-10-30 04:45:55.113 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F07/GWGQ.jpg

2011-10-30 04:45:55.113 ocStudy[309:707] Library/Application Support/iPhone Simulator/User/Media/Photos/Thumbs/F07/USPA.jpg