米华 發表於 2019-10-16 18:11:00

iOS NFC功能开发

<p><strong><span style="color: rgba(255, 0, 0, 1)">一、NDEF格式的</span></strong></p>
<p>使用&nbsp;NFCNDEFReaderSession。Delegate为：NFCNDEFReaderSessionDelegate</p>
<p><strong><span style="color: rgba(153, 204, 255, 1)">1、初始化对象</span></strong></p>
<p><strong>@property</strong>(<strong>strong</strong>,<strong>nonatomic</strong>)NFCNDEFReaderSession *session;</p>
<p><strong>@property</strong>(<strong>strong</strong>,<strong>nonatomic</strong>)<strong>id</strong>&lt;NFCNDEFTag&gt; cuurentTag;</p>
<p><strong>self</strong>.session = [initWithDelegate:<strong>self</strong> queue:<strong>nil</strong> invalidateAfterFirstRead:<strong>YES</strong>]; //YES为只读一个TAG然后结束，NO为读取多个</p>
<p><strong>self</strong>.session.alertMessage = @"读取卡片，请将卡片靠近手机";</p>
<p>[<strong>self</strong>.session beginSession]; //开始识别 弹出识别提示框</p>
<p>代理方法</p>
<p>-(<strong>void</strong>)readerSession:(NFCNDEFReaderSession *)session didDetectTags:(NSArray&lt;<strong>__kindof</strong> <strong>id</strong>&lt;NFCNDEFTag&gt;&gt; *)tags API_AVAILABLE(ios(13.0)){</p>
<p>&nbsp; <strong>self</strong>.cuurentTag = ;</p>
<p>}</p>
<p>识别到卡片后会回调该方法，在该方法中可获取到tag。</p>
<p><strong><span style="color: rgba(153, 204, 255, 1)">2、读取卡片内容：获取到卡ID均为空，获取卡ID需要下面第二种方法。</span></strong></p>
<p>2.1 需要先建立连接</p>
<p>;</p>
<p>2.2连接成功之后调用方法，可以获取到卡片的内容</p>
<p>;</p>
<p><strong><span style="color: rgba(153, 204, 255, 1)">3、写入NDEF内容</span></strong></p>
<p>3.1 需要先建立连接</p>
<p>;</p>
<p>3.2连接成功之后调用方法获取卡片状态：判断是否可以写入</p>
<p>[<strong>self</strong>.cuurentTag queryNDEFStatusWithCompletionHandler:^(NFCNDEFStatus status, NSUInteger capacity, NSError * <strong>_Nullable</strong> error) {}]；</p>
<p>状态&nbsp;status ==&nbsp;NFCNDEFStatusReadWrite 则可以写入。</p>
<p>3.3 写入</p>
<p>[<strong>self</strong>.cuurentTag writeNDEF:myMessage completionHandler:^(NSError * <strong>_Nullable</strong> error) {}];</p>
<p><strong><span style="color: rgba(255, 0, 0, 1)">二、iOS13新支持的类型：NFCPollingISO14443 &nbsp;NFCPollingISO15693 &nbsp;NFCPollingISO15693</span></strong></p>
<p>使用NFCTagReaderSession。Delegate为：NFCTagReaderSessionDelegate</p>
<p><strong><span style="color: rgba(153, 204, 255, 1)">1.初始化对象</span></strong></p>
<p><strong>self</strong>.session = [</p>
<p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; initWithPollingOption:(NFCPollingISO14443 | NFCPollingISO15693 | NFCPollingISO15693) delegate:<strong>self</strong> queue:dispatch_get_main_queue()];</p>
<p><strong>self</strong>.session.alertMessage = @"读取卡片，请将卡片靠近手机";</p>
<p>[<strong>self</strong>.session beginSession]; //开始识别 弹出识别提示框</p>
<p>代理方法</p>
<p>-(<strong>void</strong>)tagReaderSession:(NFCTagReaderSession *)session &nbsp;didDetectTags:(NSArray&lt;<strong>__kindof</strong> <strong>id</strong>&lt;NFCTag&gt;&gt; *)tags{</p>
<p>&nbsp;&nbsp;<strong>self</strong>.cuurentTag = ;</p>
<p>}</p>
<p><strong><span style="color: rgba(153, 204, 255, 1)">2、读取id（判断卡类型，以下以其中一种为例），内容获取方法同上</span></strong></p>
<p><strong>if</strong> (<strong>self</strong>.currentTag.type == NFCTagTypeMiFare) {</p>
<p>&nbsp; &nbsp; &nbsp; &nbsp; <strong>id</strong>&lt;NFCMiFareTag&gt; mifareTag = [<strong>self</strong>.currentTag asNFCMiFareTag];</p>
<p>　　 &nbsp;NSData *data =&nbsp;mifareTag.identifier</p>
<p>}</p>
<p><strong><span style="color: rgba(153, 204, 255, 1)">3.写入方法同上使用的tag需要为具体类型的tag，如：NFCMiFareTag</span></strong></p>
<p>;</p>
<p>&nbsp;</p><br><br>
来源：https://www.cnblogs.com/lxh123/p/11687301.html
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