常用编程语法干货

汇总一下最近用到过的语法，首先声明我对Bash和Object-C语言用的不多，只是日常积累。

Bash if or and 语法

if [ "$ifcentos" != "" ] && [ "$machine" == "x86_64" ];thensed -i 's/^#exclude/exclude/' /etc/yum.conffiif [ "$ifubuntu" != "" ] || [ "$ifdebian" != "" ];then   mkdir -p /var/lock   sed -i 's#exit 0#touch /var/lock/local#' /etc/rc.localelse   mkdir -p /var/lock/subsys/fi

Object-C 查找字符串是否存在

if ([string rangeOfString:substring].location == NSNotFound){          NSLog(@"Substring Not Found");}else{    NSLog(@"Substring Found Successfully");}

Object-C 获取文件夹Documents路径

NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);NSString* documentsDirectory = [paths objectAtIndex:0];

对应模拟器下的路径：

/Users/lixiphp/Library/Application Support/iPhone Simulator/7.1/Applications/XXXXXX/Documents

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