ARC 항목 에 performSelector:withObject 사용 하기:

ARC 항목 에서 사용 performSelector: withObject: 함수 에"performSelector may cause a leak because its selector is unknown"이 나타 납 니 다.stackoverflow 에서 해결 방안 을 찾 았 습 니 다.주소:http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown。
주로 경고 메시지 로 비 ARC 항목 에는 이 경고 가 없습니다.한 곳 에서 수정 하려 면 다음 코드 만 추가 하 십시오.
 

<code style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu sans Mono', 'Bitstream Vera sans Mono', 'Courier new', monospace, serif;"><span style="word-wrap: normal; word-break: normal; line-height: 21px; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: gray;">#pragma</span><span style="word-wrap: normal; word-break: normal; line-height: 21px; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> clang diagnostic push
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</span><span style="word-wrap: normal; word-break: normal; line-height: 21px; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: gray;">#pragma</span><span style="word-wrap: normal; word-break: normal; line-height: 21px; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> clang diagnostic pop</span></code>

<code style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu sans Mono', 'Bitstream Vera sans Mono', 'Courier new', monospace, serif;"><span style="word-wrap: normal; word-break: normal; line-height: 21px; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">          ，        ，  ：</span></code>

</pre><pre name="code" style="white-space: pre-wrap; color: rgb(50, 62, 50); font-size: 14px; line-height: 21px; word-wrap: break-word; margin-top: 0px; margin-bottom: 10px; padding: 5px; border: 0px; vertical-align: baseline; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu sans Mono', 'Bitstream Vera sans Mono', 'Courier new', monospace, serif; overflow: auto; width: auto; max-height: 600px;"><code style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu sans Mono', 'Bitstream Vera sans Mono', 'Courier new', monospace, serif;"><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: gray;">#define</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> </span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(43, 145, 175);">SuppressPerformSelectorL<wbr>eakWarning</wbr></span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">(</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(43, 145, 175);">Stuff</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">)</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> \
    </span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(0, 0, 139);">do</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> </span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">{</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> \
        </span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(43, 145, 175);">_Pragma</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">(</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(128, 0, 0);">"clang diagnostic push"</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">)</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> \
        </span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(43, 145, 175);">_Pragma</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">(</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(128, 0, 0);">"clang diagnostic ignored "-Warc-performSelector-leaks""</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">)</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> \
        </span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(43, 145, 175);">Stuff</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">;</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> \
        </span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(43, 145, 175);">_Pragma</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">(</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(128, 0, 0);">"clang diagnostic pop"</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">)</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> \
    </span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">}</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> </span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(0, 0, 139);">while</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;"> </span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">(</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(128, 0, 0);">0</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">)</span></code>

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</pre><pre name="code" style="white-space: pre-wrap; color: rgb(50, 62, 50); font-size: 14px; line-height: 21px; word-wrap: break-word; margin-top: 0px; margin-bottom: 10px; padding: 5px; border: 0px; vertical-align: baseline; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu sans Mono', 'Bitstream Vera sans Mono', 'Courier new', monospace, serif; overflow: auto; width: auto; max-height: 600px;"><code style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu sans Mono', 'Bitstream Vera sans Mono', 'Courier new', monospace, serif;"><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(43, 145, 175);">SuppressPerformSelectorL<wbr>eakWarning</wbr></span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">(</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">
    </span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">[</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">_target performSelector</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">:</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">_action withObject</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">:</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">self</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">]</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">
</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">);</span></code>

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</pre><pre name="code" style="white-space: pre-wrap; color: rgb(50, 62, 50); font-size: 14px; line-height: 21px; word-wrap: break-word; margin-top: 0px; margin-bottom: 10px; padding: 5px; border: 0px; vertical-align: baseline; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu sans Mono', 'Bitstream Vera sans Mono', 'Courier new', monospace, serif; overflow: auto; width: auto; max-height: 600px;"><code style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu sans Mono', 'Bitstream Vera sans Mono', 'Courier new', monospace, serif;"><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">id result</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">;</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">
</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; color: rgb(43, 145, 175);">SuppressPerformSelectorL<wbr>eakWarning</wbr></span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">(</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">
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</span><span style="word-wrap: normal; word-break: normal; margin: 0px; padding: 0px; border: 0px; vertical-align: baseline;">);</span></code>