方式1（低端设备有效）：
使用方法：
代码：
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复制上面的代码内容发送给你的好友，他查看消息的时候就会卡死。
原理解析：
“oo0.oo.OOO00.”这种字符会消耗GPU绘制性能。
方式2（所有设备都会卡死）：
使用方法：
代码：
这是一条不可复制的消息！
复制上面的代码内容发送给你的好友，他敢复制这条消息便会卡死。
原理解析：
这串文本内容中含有隐藏的Unicode控制字符，并且是很长的一串字符（见下图）。一般的应用程序的字符显示编码为UTF-8，UTF-8编码下无法显示这些Unicode控制字符，像是隐藏了似的。看起来就一句话 其实是字节很多的内容，通过大量的字节可以使处理字符的API发生延迟，最终造成应用程序假死。
以ANSI编码查看：
以UTF-8编码查看：
