iphone - How to realize action on multiple objects -

i have values of uibuttons. every button have created dynamically, code:

-(void)addnewtable: (nsstring *) tablepic: (nsstring *) addedtype {     createdtable *ct = [[createdtable alloc] init];    cfuuidref newuniqueid = cfuuidcreate(kcfallocatordefault);    nsstring * uuidstring = (__bridge nsstring*)cfuuidcreatestring(kcfallocatordefault, newuniqueid);    cfrelease(newuniqueid);    uiimage *tableimage = [uiimage imagenamed: tablepic];    cgrect framebtn = cgrectmake(160.0f, 160.0f, tableimage.size.width, tableimage.size.height);     uibutton *button = [uibutton buttonwithtype:uibuttontypecustom];     [button setbackgroundimage: tableimage forstate:uicontrolstatenormal];    [button setframe:framebtn];    [button addtarget:self action:@selector (draggedout:withevent::) forcontrolevents:uicontroleventtouchdraginside];    [button settitle: [nsstring stringwithformat:@"%d", tables.count] forstate: uicontrolstatenormal];     ct.id = [uuidstring lowercasestring];    ct.posx = 160;    ct.posy = 160;    ct.isactive = true;    ct.index = button.titlelabel.text;    ct.picture = [nsstring stringwithformat:@"tables/%@", tablepic];    ct.type = addedtype;    ct.angle = 0.0;    [tables addobject:ct];    [hallview addsubview:button]; } 

createdtable - nsobject string params of created buttons.

as can see, i'm adding selector every created button. can move every button selector. here it's code:

- (ibaction)draggedout: (id)sender withevent: (uievent *) event: (nsset *)touches {    createdtable = [tables objectatindex: selected.[titlelabel.text intvalue]]    uibutton *selected = (uibutton *)sender;    selected.center = [[[event alltouches] anyobject] locationinview:hallview];     ct.posx = selected.center.x;    ct.posy = selected.center.y; // here i'm changing params in ct. }  

now need realize multi-select (select value of buttons tapping on them, make king of group) , after need move group (all selected buttons) 1 single object.

any suggestions how realize it?

when user select multiple buttons 1 one , mark them selected buttons changing background image . when user starts dragging 1 of selected button create bigger view (with clear background color) , add copies(new buttons alike selected buttons) of selected buttons , add them on bigger view . changing position of original button (button getting dragged) , change position of bigger view . give , feel selected button getting dragged . bigger view dragging stopped remove original selected buttons main view .

hope you.