Issue in using Tabbarcontroller - ios

Question

i am using TabbarController with four tabbarItem. but my requirement is Tabbar is shown in Top on viewController so that is done.but issue is when adding dropdownview on viewcontroller Tabbar hides dropdown. please help me
My viewController Class Code
import UIKit
class TrendingVC: UIViewController,DropDownViewDelegate
{
#IBOutlet var btndropdown: UIButton!
var dropdown = DropDownView()
override func viewDidLoad() {
super.viewDidLoad()
dropdown = dropdown.initWithArrayData(["1111111111","222222222","3233333333","33333333333","1222333333"], cHeight: 30, tableviewHight: 150, tPaddingTop:0, tPaddingLeft: 0, tPaddingRight: 0, refView: btndropdown, tAnimation:AnimationType.GROW, openAnimationDuration: 0.5, closeAnimationDuration: 0.5, Dropdowncolor: UIColor.purpleColor(), DropdowntextColor: UIColor.whiteColor(), DropdowntextSize: 17) as! DropDownView
dropdown.delegate = self;
self.view.addSubview(dropdown.view);
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func DropDownCellSelected(index: NSInteger)
{
print(index);
}
#IBAction func btndropdownclik(sender:UIButton!)
{
self.view.bringSubviewToFront(dropdown.view)
dropdown.OpenAnimation()
}
My Custom Dropdown Class Code Here
import UIKit
enum AnimationType
{
case BLENDIN
case GROW
case BOTH
}
protocol DropDownViewDelegate
{
func DropDownCellSelected(index:NSInteger) -> Void
}
class DropDownView: UIViewController,UITableViewDelegate,UITableViewDataSource
{
var arrDropDown = NSMutableArray()
var delegate: DropDownViewDelegate!
var OPENAnimationDuration,CLOSEAnimationDuration,DropdownViewTextsize,CellHight,DropDownHight,LeftMargin,RightMargin,TopMargin:CGFloat!
var refillview:UIView!
var DropdownViewColor,DropDownviewTextcolor:UIColor!
var animationType:AnimationType!
var tbl:UITableView!
override func viewDidLoad()
{
super.viewDidLoad()
let refFrame:CGRect = refillview.frame;
tbl = UITableView();
tbl.frame = CGRectMake(0, 0, refFrame.size.width+RightMargin, (animationType == AnimationType.BOTH||animationType == AnimationType.BLENDIN) ?DropDownHight:1)
tbl.dataSource = self;
tbl.delegate = self;
//uiTableView.backgroundColor=[UIColor colorWithRed:15/255 green:41/255 blue:63/255 alpha:1];
tbl.backgroundColor = UIColor.clearColor()
self.view.addSubview(tbl)
self.view.hidden = true;
if (animationType == AnimationType.BOTH || animationType == AnimationType.BOTH)
{
self.view.alpha = 1;
}
}
override func didReceiveMemoryWarning()
{
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Tableview Methods
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return arrDropDown.count;
}
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1;
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
let cellidentifier:NSString = "CellId";
var cell:UITableViewCell? = tableView.dequeueReusableCellWithIdentifier(cellidentifier as String)
if cell==nil
{
cell = UITableViewCell.init(style: UITableViewCellStyle.Default, reuseIdentifier: cellidentifier as String)
}
cell!.backgroundColor = UIColor.purpleColor();
cell!.textLabel?.text = arrDropDown.objectAtIndex(indexPath.row) as? String
cell!.selectionStyle = UITableViewCellSelectionStyle.None;
cell!.textLabel?.font = UIFont(name:"helvetica" , size: 20)
return cell!
}
func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat
{
return CellHight;
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath)
{
self.CloseAnimation()
delegate.DropDownCellSelected(indexPath.row)
}
func OpenAnimation()
{
self.view.hidden = false
//var newCenter:CGPoint = CGPointMake(playAgainButton.center.x, playAgainButton.center.y + 200)
UIView.beginAnimations(nil, context: nil)
UIView.setAnimationDuration(1.0)
tbl.frame = CGRectMake(tbl.frame.origin.x,tbl.frame.origin.y,tbl.frame.size.width, DropDownHight);
UIView.commitAnimations()
}
func CloseAnimation()
{
self.view.hidden = false;
UIView.beginAnimations(nil, context: nil)
UIView.setAnimationDuration(1.0)
tbl.frame = CGRectMake(tbl.frame.origin.x,tbl.frame.origin.y,tbl.frame.size.width, 0);
UIView.commitAnimations()
}
func OpenAnimationWithRef()
{
}
func initWithArrayData(data:NSArray,cHeight:CGFloat,tableviewHight:CGFloat,tPaddingTop:CGFloat,tPaddingLeft:CGFloat,tPaddingRight:CGFloat,refView:UIView!,tAnimation:AnimationType,openAnimationDuration:CGFloat,closeAnimationDuration:CGFloat,Dropdowncolor:UIColor!,DropdowntextColor:UIColor!,DropdowntextSize:CGFloat) -> AnyObject
{
arrDropDown=data.mutableCopy() as! NSMutableArray;
CellHight = cHeight;
DropDownHight = tableviewHight;
TopMargin = tPaddingTop;
LeftMargin = tPaddingLeft;
RightMargin = tPaddingRight;
refillview = refView;
OPENAnimationDuration = openAnimationDuration;
CLOSEAnimationDuration = closeAnimationDuration;
animationType = tAnimation;
DropdownViewColor = Dropdowncolor;
DropDownviewTextcolor = DropdowntextColor;
DropdownViewTextsize = DropdowntextSize;
let reframe = refView.frame;
self.view.frame = CGRectMake(reframe.origin.x-LeftMargin, reframe.origin.y+reframe.size.height+TopMargin, reframe.size.width+RightMargin,DropDownHight);
self.view.layer.shadowColor = UIColor.clearColor().CGColor
self.view.layer.shadowOffset = CGSizeMake(5.0, 5.0)
self.view.layer.shadowOpacity = 1.0;
self.view.layer.shadowRadius = 5.0;
tbl.layer.cornerRadius = 5.0;
tbl.layer.borderWidth = 3.0;
tbl.layer.borderColor = UIColor.darkGrayColor().CGColor;
tbl.autoresizingMask = UIViewAutoresizing.FlexibleWidth;
return self
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}