the way to transfer NSString variables among multi viewcontrollers
<p>As I know, I can use global variable transfer the value among the multi viewcontrollers of a project.</p>

<p>But I hope to know the best way to transfer NSString variables between multi viewcontrollers and the way to avoid memory leak.</p>

<p>Welcome any comment</p>

<p>Thanks</p>

<p>interdev</p>
