UIpickerview not animating from UItabbarcontroller - iphone

Question

i add some viewcontroller to the tab bar controller and in viewcontroller i add 1 textfield so when i click on text field i call UIactionsheet. the action sheet contain 2 sub parts (1. UIpickerview 2. UItoolbar)... i face some issue like when i load UIactionsheet it works fine but i am not able select any row.. or not click on done button for dissmiss actionsheet. i put some code here..
in tabbarcontroller.m
-(void)LoadActionSheet
{
actionsheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil];
actionsheet.actionSheetStyle = UIActionSheetStyleDefault;
actionsheet.delegate = self;
}
in viewcontroller.m
-(void) Comboaction:(NSMutableArray *)DataArray
{
EditTabController *obj_tab = [[EditTabController alloc] init];
[obj_tab LoadActionSheet];
UIToolbar *Toolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(100, obj_tab.actionsheet.frame.origin.y-15, 200, 44)];
Toolbar.barStyle = UIBarStyleBlack;
[Toolbar sizeToFit];
[Toolbar bringSubviewToFront:obj_tab.actionsheet];
NSMutableArray *barItems = [[NSMutableArray alloc] init];
UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
[barItems addObject:flexSpace];
UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:#selector(DissmissPickerview)];
[barItems addObject:doneBtn];
[Toolbar setItems:barItems animated:YES];
[obj_tab.actionsheet setBounds:CGRectMake(0, obj_tab.tbar.frame.origin.y-100, 325,40)];
picker = [[UIPickerView alloc] init];
[picker setFrame:CGRectZero];
picker.tag = 101;
picker.delegate = self;
picker.dataSource = self;
picker.showsSelection
Indicator = YES;
[picker setShowsSelectionIndicator:YES];
[picker setBackgroundColor:[UIColor blackColor]];
// [picker setFrame:CGRectMake(0,Toolbar.frame.size.height+1, 320, 360)];
[picker bringSubviewToFront:obj_tab.actionsheet];
[obj_tab.actionsheet setDelegate:self];
[obj_tab.actionsheet addSubview:Toolbar];
[obj_tab.actionsheet addSubview:picker];
[obj_tab.actionsheet setBounds:CGRectMake(0, 0, 320, 50)];
[obj_tab.actionsheet showInView:[UIApplication sharedApplication].keyWindow];
}
and all pickerview delegate methods.. it works fine in simple viewcontroller. but not work properly in tabbarcontroller..