源自:http://www.cnblogs.com/yangbingqi/p/3328610.html 刚安装完CentOS,使用yum命令安装一些常用的软件,使用如下命令:yum grouplist | more. 提示如下错误信息: Loaded plugins: fastestmirror Setting up Group Process Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=6&arch=x…
"[__NSCFConstantString size]: unrecognized selector sent to instance." =>将NSString类型的参数赋值给UIImage类型的时候报出, 解决方案使用[UIImage imageNamed:] switch case in protected scope 异常解决 =>case条件后, break之前添加{ }后,编译错误可解决.…