不是很完美的方法，可以凑活着用：

1. 切换到Pages预览页，右击页面选页面属性
2. 切换到Action，选Run a Javascript，代码：

// PDF JavaScript to make it a "TRIAL EDITION".

// Set the date you would like it to EXPIRE ON.

var d1 = util.scand("mm/dd/yy", "5/25/18");

// Let the script do the work...

var expire_on_X_days_left = 0;

var d2 = new Date();

var diff = (d2.valueOf() - d1.valueOf()) / 1000;

var daysleft = ((diff / 60) / 60) / 24;

if( daysleft > expire_on_X_days_left || daysleft == expire_on_X_days_left )

{

app.beep(1);

//app.alert("This document cannot be viewed anymore.");

this.closeDoc();

}

// :-) Script by Brian (thedude at bri1 com).

不知道能否连接到internet时间，然后再判断