#import "Controller.h" 

@implementation  Controller
NSTimer *timer= nil ;

- ( IBAction )pushButton:( id )sender
{
[[NSApplication sharedApplication] hide: nil ];

NSDate *theDate = [NSDate dateWithTimeIntervalSinceNow: 10 ]; //10 秒後にタイマー起動  
//userInfo に使う辞書を作成 
NSDictionary *userInfoDictionary =[NSDictionary dictionaryWithObjectsAndKeys:
self , @"key" , nil ];
// タイマー作成 
timer = [NSTimer scheduledTimerWithTimeInterval: 1.0 
target: self 
selector: @selector (timerControl:)
userInfo: userInfoDictionary
repeats: NO ];
// 起動時間セット 
[timer setFireDate:theDate];
[[NSRunLoop currentRunLoop] addTimer:timer forMode:NSModalPanelRunLoopMode];

}

-( void ) timerControl:(NSTimer *)aTimer
{
[NSApp unhide:[[aTimer userInfo] objectForKey: @"key" ]];
}

@end