#import "MyObject.h" 

@implementation  MyObject

// ボタンを押したら、呼び出すメソッドが変わる 
- ( IBAction )action1:( id )sender
{
if  ([sender action] == @selector (action1:)){
NSLog( @"action1" );
[sender setAction: @selector (action2:)];
}

}

- ( IBAction )action2:( id )sender
{
if  ([sender action] == @selector (action2:)){
NSLog( @"action2" );
[sender setAction: @selector (action3:)];
}
}

- ( IBAction )action3:( id )sender
{
if  ([sender action] == @selector (action3:)){
NSLog( @"action3" );
[sender setAction: @selector (action1:)];
}
}

@end