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<b>9.</b>
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<b>11.</b>
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<b>14.</b>
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<b>16.</b>
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<b>17.</b>
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<b>18.</b>
touchid
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<b>19.</b>
UIViewController
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<b>20.</b>
delegate kvo
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<b>21.</b>
dataSave
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<b>22.</b>
pickerView
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<b>23.</b>
quartz2D
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<b>24.</b>
UITextField
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<b>25.</b>
UIDynamic
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<b>26.</b>
coreAnimation
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<b>27.</b>
Cocoapods
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<b>28.</b>
Thread
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<b>29.</b>
network
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<section class="normal" id="section-gitbook_16">
<h1 id="datasave">dataSave</h1>
<p>数据存储</p>
<ul>
<li>plist存储</li>
<li>Plist注意：不能存储自定义对象<pre><code class="lang-objc"><span class="hljs-comment">//获取应用的文件夹（应用沙盒）</span>
<span class="hljs-built_in">NSString</span> *homePath = NSHomeDirectory();
<span class="hljs-comment">//获取temp</span>
NSTemporaryDirectory();
<span class="hljs-comment">// 如何判断一个对象能不能使用Plist，就看下有没有writeToFile方法</span>
<span class="hljs-built_in">NSArray</span> *arr = @[<span class="hljs-string">@"123"</span>,@<span class="hljs-number">1</span>];
<span class="hljs-comment">//获取Cache文件路径</span>
<span class="hljs-comment">//NSSearchPathDirectory:搜索的目录 NSSearchPathDomainMask：搜索范围 NSUserDomainMask:表示在用户的手机上查找 expandTilde 是否展开全路径，如果没有展开，应用的沙盒路径就是~</span>
存储一定要要展开路径
<span class="hljs-built_in">NSString</span> *cachePaht = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, <span class="hljs-literal">YES</span>)[<span class="hljs-number">0</span>];
<span class="hljs-comment">// 拼接文件名</span>
<span class="hljs-built_in">NSString</span> *filePath = [cachePaht stringByAppendingPathComponent:<span class="hljs-string">@"personArr.plist"</span>];
<span class="hljs-comment">// File:文件的全路径</span>
[arr writeToFile:filePath atomically:<span class="hljs-literal">YES</span>];
<span class="hljs-comment">//读取</span>
<span class="hljs-built_in">NSArray</span> *arr = [<span class="hljs-built_in">NSArray</span> arrayWithContentsOfFile:filePath];
</code></pre>
</li>
<li>偏好设置存储<pre><code class="lang-objc">偏好设置存储好处：
<span class="hljs-number">1.</span>不需要关心文件名
<span class="hljs-number">2.</span>快速做键值对存储
底层：就是封装了一个字典
<span class="hljs-built_in">NSUserDefaults</span> *userDefaults = [<span class="hljs-built_in">NSUserDefaults</span> standardUserDefaults];
[userDefaults setObject:<span class="hljs-string">@"xmg"</span> forKey:<span class="hljs-string">@"account"</span>];
[userDefaults setObject:<span class="hljs-string">@"123"</span> forKey:<span class="hljs-string">@"pwd"</span>];
[userDefaults setBool:<span class="hljs-literal">YES</span> forKey:<span class="hljs-string">@"rmbPwd"</span>];
<span class="hljs-comment">// 同步 在iOS7之前，默认不会马上把跟硬盘同步</span>
[userDefaults synchronize];
<span class="hljs-comment">//读取</span>
<span class="hljs-built_in">NSString</span> *pwd = [[<span class="hljs-built_in">NSUserDefaults</span> standardUserDefaults] objectForKey:<span class="hljs-string">@"pwd"</span>];
</code></pre>
</li>
<li>对象归档<ul>
<li>如果一个自定义对象想要归档，必须遵守NSCoding协议，实现协议方法。<ul>
<li>(void)encodeWithCoder:(NSCoder *)aCoder<ul>
<li>自定义对象归档的时候调用，用来描述当前对象里面的哪些属性需要归档</li>
</ul>
</li>
<li>(id)initWithCoder:(NSCoder *)aDecoder<ul>
<li>解档对象的时候调用，用来描述当前对象里面的哪些属性需要解档<pre><code class="lang-objc">Person *p = [[Person alloc] init];
<span class="hljs-comment">// 获取cache</span>
<span class="hljs-built_in">NSString</span> *cachePath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, <span class="hljs-literal">YES</span>) lastObject];
<span class="hljs-comment">// 获取文件的全路径</span>
<span class="hljs-built_in">NSString</span> *filePath = [cachePath stringByAppendingPathComponent:<span class="hljs-string">@"person.data"</span>];
<span class="hljs-comment">// 把自定义对象归档</span>
[NSKeyedArchiver archiveRootObject:p toFile:filePath];
<span class="hljs-comment">//解档</span>
Person *p = [NSKeyedUnarchiver unarchiveObjectWithFile:filePath];
</code></pre>
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