如何在可可中獲得可變的applescript值？

Question

NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init] ; 

NSAppleEventDescriptor *eventDescriptor; 
NSAppleScript *script ; 
NSString* source ; 
NSDictionary* errorDic ; 

source=@"tell application \"iTunes\" \n" 
@"set tname to name of track 1 of playlist 1 \n" 
@"set tartist to artist of track 1 of playlist 1 \n" 
@"set talbum to album of track 1 of playlist 1 \n" 
@"set ttime to time of track 1 of playlist 1 \n" 
@"set tbitrate to bit rate of track 1 of playlist 1 \n" 
@"set tsize to size of track 1 of playlist 1 \n" 
@"set trating to rating of track 1 of playlist 1 \n" 
@"end tell"; 

script = [[NSAppleScript alloc] initWithSource:source]; 
eventDescriptor = [script executeAndReturnError:&errorDic]; 
NSString* frontUrl = [eventDescriptor stringValue]; 
NSLog(frontUrl); 

/*NSAlert *alert = [[NSAlert alloc]init]; 
[alert setMessageText:frontUrl]; 
[alert runModal]; 
[alert release];*/ 

[pool release] ; 

NSlog只顯示曲目評分。如何獲得tname，tartist，talbum等的價值？'

在此先感謝

Answer 1

Applescript返回最後執行的語句的值。在這種情況下，這是trating。在最後包含所有值的語句（比如列表）。