NSDictionary store the objects from the last array - ios

Question

I have created 3 buttons at my top.take the offset of them and giving them same IBAction.
I want to change images at below according to the which button is pressed.
Further i have to pass these images to the another ViewControler, Here
i have got 3 arrays named bundle1 , bundle2 , bundle3 . in each array i have set of 5 images, in my Viewdidload as below,
bundle1 = #[#"1.png",#"2.png", #"3.png", #"4.png" ,#"5.png"];
bundle2 = #[#"6.png", #"7.png", #"8.gif",#"9.jpeg", #"10.jpeg" ];
bundle3 = #[#"11.jpg", #"12.jpg" ,#"13.jpeg", #"14.jpeg", #"15.jpeg"];
now i had take mutabledictionary, which had upper 3 arrays and i had give them a specific key
as below.
mutdict = [[NSMutableDictionary alloc] initWithObjectsAndKeys: bundle1 , #"key1" , bundle2 , #"key2" , bundle3 , #"key3" ,nil];
Now below is the code for IBAction of Upper 3 buttons, (Which is the same for all 3 buttons).
-(IBAction)morebtn:(id)sender
{
for (UIView *subview in [scroll subviews])
{
[subview removeFromSuperview];
}
arraydata = [[NSMutableArray alloc] init];
if ([sender tag] == 1) {
NSLog(#"hey btn1 clicked");
for (UIImage *b in arraydata)
{
[arraydata removeAllObjects];
}
arraydata = [mutdict valueForKey:#"key1"];
}
if ([sender tag] == 2) {
NSLog(#"hey btn2 clicked");
for (UIImage*b in arraydata)
{
[arraydata removeAllObjects];
}
arraydata = [mutdict valueForKey:#"key2"];
}
if ([sender tag] == 3) {
NSLog(#"hey btn3 clicked");
for (UIImage*b in arraydata)
{
[arraydata removeAllObjects];
}
arraydata = [mutdict valueForKey:#"key3"];
}
int x=10,y=300;
for (int k=0; k<arraydata.count; k++) {
NSLog(#"main called");
UIButton *btn=[UIButton buttonWithType:UIButtonTypeCustom];
[btn setImage:[UIImage imageNamed:[arraydata objectAtIndex:k]] forState:UIControlStateNormal];
btn.tag=k;
btn.frame=CGRectMake(x, y, 100, 100);
[btn addTarget:self action:#selector(btn4images1:) forControlEvents:UIControlEventTouchUpInside];
x+=100;
scroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 300, self.view.frame.size.width, 200)];
scroll.contentSize = CGSizeMake(self.view.frame.size.width , 200);
[scroll addSubview:btn];
[self.view addSubview:scroll];
}
}
in upper code i trace which button is pressed and according to it i wil give inages in my NSArray named arraydata.
when i first time click on the all 3 upper buttons they show me image related to their array, but when i second time click on button1 (placed on the top), The images related to button3 are also shown in the Buttonbackground (palced at below part).
so on clicking button1 in below part button background images are overlaped. Seems like my NSMutableDictionary stores the data of last array. don't know what exactly happen.