iOS SDK详解之NSFileManager

出处 http://blog.csdn.net/hello_hwc?viewmode=list

前言：NSFileManager提供了一种方便的方式进行文件操作，包括文件和目录的创建，拷贝，剪切，删除等。 
本文会详细讲解如何进行这些最基本的操作。

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要注意的几点

1. 使用defaultManager的时候，实际上获取的是一个单例（同一个对象），是线程安全的，绝大多数时候，使用这个就可以了。本文讲解基础操作的时候，就使用这个。
2. 如果在不同线程中使用，而且需要代理函数来监听事件，这时候要使用init来创建每个线程独立的fileManager

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定位

说白了，就是获取一些目录。主要就是两个函数 
只是定位

<code class="hljs haml has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">-<span class="ruby" style="box-sizing: border-box;"> <span class="hljs-constant" style="box-sizing: border-box;">URLsForDirectory</span><span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">:inDomains</span><span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">:</span></span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>

举例 
获取library目录（默认存在）

<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">  <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSFileManager</span> * fileManager = [<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSFileManager</span> defaultManager];    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSArray</span> * searchResult =  [fileManager URLsForDirectory:NSLibraryDirectory inDomains:NSUserDomainMask];    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSURL</span> * documentPath = [searchResult firstObject];    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSLog</span>(@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"%@"</span>,documentPath);</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li></ul>

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定位的时候可以创建

<code class="hljs haml has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">-<span class="ruby" style="box-sizing: border-box;"> <span class="hljs-constant" style="box-sizing: border-box;">URLForDirectory</span><span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">:inDomain</span><span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">:appropriateForURL</span><span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">:create</span><span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">:error</span><span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">:</span></span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>

获取Application Support（默认不存在）

<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;"> <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSFileManager</span> * fileManager = [<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSFileManager</span> defaultManager];    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSURL</span> * path =  [fileManager URLForDirectory:NSApplicationSupportDirectory inDomain:NSUserDomainMask appropriateForURL:<span class="hljs-literal" style="color: rgb(0, 102, 102); box-sizing: border-box;">nil</span> create:<span class="hljs-literal" style="color: rgb(0, 102, 102); box-sizing: border-box;">YES</span> error:<span class="hljs-literal" style="color: rgb(0, 102, 102); box-sizing: border-box;">nil</span>];    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSLog</span>(@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"%@"</span>,path);</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li></ul>

这里要提到的几个常用参数

• NSLibraryDirectory － Library目录
• NSApplicationSupportDirectory － Library/Application Support目录
• NSDocumentDirectory － Document 目录
• NSUserDomainMask － 用户域 
  至于，哪个域存储什么东西，参见我之前写的关于沙盒的文章 
  http://blog.csdn.net/hello_hwc/article/details/44916909

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判断文件/目录是否存在

两个函数 
第二个函数还有一个额外输出，如果这个文件存在的话，会给出这个文件是不是目录文件

<code class="hljs haml has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">-<span class="ruby" style="box-sizing: border-box;"> <span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">fileExistsAtPath:</span></span>-<span class="ruby" style="box-sizing: border-box;"> <span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">fileExistsAtPath:</span><span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">isDirectory:</span></span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li></ul>

<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">       <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSFileManager</span> * fileManager = [<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSFileManager</span> defaultManager];    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSArray</span> * searchResult =  [fileManager URLsForDirectory:NSLibraryDirectory inDomains:NSUserDomainMask];    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSURL</span> * documentPath = [searchResult firstObject];    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> * newPath = [documentPath<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">.path</span> stringByAppendingPathComponent:@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"Demo/Wenchen"</span>];    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> ([fileManager fileExistsAtPath:newPath] == <span class="hljs-literal" style="color: rgb(0, 102, 102); box-sizing: border-box;">false</span>) {        <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSLog</span>(@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"Path not exist"</span>);    }    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">BOOL</span> isDic;    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> ([fileManager fileExistsAtPath:documentPath<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">.path</span> isDirectory:&isDic] == <span class="hljs-literal" style="color: rgb(0, 102, 102); box-sizing: border-box;">false</span>) {        <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSLog</span>(@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"Path not exist"</span>);    }    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSLog</span>(@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"%d"</span>,isDic);</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li></ul>

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创建

创建目录 
两个函数参数类似，只不过第一个参数的类型不同

<code class="hljs css has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">－<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">createDirectoryAtURL</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:withIntermediateDirectories</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:attributes</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:error</span>:<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">createDirectoryAtPath</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:withIntermediateDirectories</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:attributes</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:error</span>:</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li></ul>

• 返回Bool来反映操作是否成功，如果出错，错误信息在error里

• 第二个参数代表是否自动创建不存在父目录（也就是一次创建多层目录）

• 第三个参数用来设置访问权限，通常为nil

  举例

<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;"> <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSFileManager</span> * fileManager = [<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSFileManager</span> defaultManager];    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSArray</span> * searchResult =  [fileManager URLsForDirectory:NSLibraryDirectory inDomains:NSUserDomainMask];    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSURL</span> * documentPath = [searchResult firstObject];    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> * newPath = [documentPath<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">.path</span> stringByAppendingPathComponent:@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"Demo/Wenchen"</span>];    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> ([fileManager fileExistsAtPath:newPath] == <span class="hljs-literal" style="color: rgb(0, 102, 102); box-sizing: border-box;">false</span>) {        [fileManager createDirectoryAtPath:newPath withIntermediateDirectories:<span class="hljs-literal" style="color: rgb(0, 102, 102); box-sizing: border-box;">YES</span> attributes:<span class="hljs-literal" style="color: rgb(0, 102, 102); box-sizing: border-box;">nil</span> error:<span class="hljs-literal" style="color: rgb(0, 102, 102); box-sizing: border-box;">nil</span>];    }</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li></ul>

然后，打开沙盒，看到了创建成功

---

创建文件

使用函数 
这里的attributes除非想要设定一些读写权限，否则nil

<code class="hljs haml has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">-<span class="ruby" style="box-sizing: border-box;"> <span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">createFileAtPath:</span><span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">contents:</span><span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">attributes:</span></span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li></ul>

• 返回Bool来反映操作是否成功，如果出错，错误信息在error里

这个文件后面要用的

<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">   <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSFileManager</span> * fileManager = [<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSFileManager</span> defaultManager];    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSArray</span> * searchResult =  [fileManager URLsForDirectory:NSLibraryDirectory inDomains:NSUserDomainMask];    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSURL</span> * documentPath = [searchResult firstObject];    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> * newPath = [documentPath<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">.path</span> stringByAppendingPathComponent:@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"Demo/Wenchen"</span>];    <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">if</span> ([fileManager fileExistsAtPath:newPath] == <span class="hljs-literal" style="color: rgb(0, 102, 102); box-sizing: border-box;">false</span>) {        [fileManager createDirectoryAtPath:newPath withIntermediateDirectories:<span class="hljs-literal" style="color: rgb(0, 102, 102); box-sizing: border-box;">YES</span> attributes:<span class="hljs-literal" style="color: rgb(0, 102, 102); box-sizing: border-box;">nil</span> error:<span class="hljs-literal" style="color: rgb(0, 102, 102); box-sizing: border-box;">nil</span>];    }    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> * filePath = [newPath stringByAppendingPathComponent:@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"file.txt"</span>];    NSData *data = [NSKeyedArchiver archivedDataWithRootObject:@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"blog.csdn.net/hello_hwc"</span>];    [fileManager createFileAtPath:filePath contents:data attributes:<span class="hljs-literal" style="color: rgb(0, 102, 102); box-sizing: border-box;">nil</span>];</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li></ul>

查看沙盒，确认创建成功 

注意，使用一些诸如writeToFile的时候，如果文件不存在，是会自动创建的。

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拷贝/移动 文件

使用函数

<code class="hljs haml has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">-<span class="ruby" style="box-sizing: border-box;"> <span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">copyItemAtURL:</span><span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">toURL:</span><span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">error:</span></span>-<span class="ruby" style="box-sizing: border-box;"> <span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">copyItemAtPath:</span><span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">toPath:</span><span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">error:</span></span>-<span class="ruby" style="box-sizing: border-box;"> <span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">moveItemAtURL:</span><span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">toURL:</span><span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">error:</span></span>-<span class="ruby" style="box-sizing: border-box;"> <span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">moveItemAtPath:</span><span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">toPath:</span><span class="hljs-symbol" style="color: rgb(0, 102, 102); box-sizing: border-box;">error:</span></span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li></ul>

• 返回Bool来反映操作是否成功，如果出错，错误信息在error里

举例

<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;">  <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSFileManager</span> * fileManager = [<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSFileManager</span> defaultManager];    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSURL</span> * libraryPath =  [[fileManager URLsForDirectory:NSLibraryDirectory inDomains:NSUserDomainMask]firstObject];    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSURL</span> * documentPath = [[fileManager URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask]firstObject];    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> * oldPath = [libraryPath<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">.path</span> stringByAppendingPathComponent:@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"Demo/Wenchen/file.txt"</span>];    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> * newPath = [documentPath<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">.path</span> stringByAppendingPathComponent:@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"file.txt"</span>];    [fileManager copyItemAtPath:oldPath toPath:newPath error:<span class="hljs-literal" style="color: rgb(0, 102, 102); box-sizing: border-box;">nil</span>];</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; background-color: rgb(238, 238, 238); top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right;"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li></ul>

查看沙盒，拷贝成功 

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删除

<code class="hljs objectivec has-numbering" style="display: block; padding: 0px; background-color: transparent; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-top-left-radius: 0px; border-top-right-radius: 0px; border-bottom-right-radius: 0px; border-bottom-left-radius: 0px; word-wrap: normal; background-position: initial initial; background-repeat: initial initial;"> <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSFileManager</span> * fileManager = [<span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSFileManager</span> defaultManager];    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSURL</span> * documentPath = [[fileManager URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask]firstObject];    <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">NSString</span> * newPath = [documentPath<span class="hljs-variable" style="color: rgb(102, 0, 102); box-sizing: border-box;">.path</span> stringByAppendingPathComponent:@<span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">"file.txt"</span>];   Bool success = [fileManager removeItemAtPath:newPath error:<span class="hljs-literal" style="color: rgb(0, 102, 102); box-sizing: border-box;">nil</span>];</code>