how to select all inside IBOutletCollection - ios

Question

I created a IBOutletCollection property and action for button1 to button9. Each and every button is pressed color will change,
-(IBAction)btnCollectionAction:(id)sender {
counter = 0;
btnSelecter = sender;
if (counter == 0) {
[btnSelecter setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
counter = 1;
}
else {
[btnSelecter setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
counter = 0;
}
}
IBOutlet for selectall button,
- (IBAction)selectButtonFunction1:(id)sender {
if (counter == 0) {
[selBtn1 setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
counter = 1;
}
else {
[selBtn1 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
counter = 0;
}
}
the above both script works well.
My question is - if i pressed the select all button (change to whiteColor), the above all nine button must change to whiteColor else blackColor.
I tried like this:
if(selBtn1.touchInside) {
[btnSelecter setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
}
else {
[btnSelecter setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
}
it will change only one button instead of all.

Answer 1

Last part of your question is vague, I didn't understand the last portion. From your title I understand that you need to get all the UIButton from IBOutletCollection. I'm answering for that question.
You can toggle the color like:
- (IBAction)selectAll:(id)sender
{
for (UIButton *button in buttonCollection)
{
if([button titleColorForState:UIControlStateNormal] isEqual:[UIColor blackColor]])
{
[button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
}
else
{
[button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
}
}
}

Answer 2

Try this approach:
1. Create IBOutletCollection with all your buttons (You Allready done this)
#property (strong, nonatomic) IBOutletCollection(UIButton) NSArray *myButtons;
2. Iterate throughout collection to configure target and appearence for each button:
for (UIButton *button in self.myButtons)
{
[button addTarget:self action:#selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
[button setTitleColor:[UIColor whiteColor] forState:UIControlStateSelected];
// Do any additional configuration here
}
3. Add target to selectAll button and assign Tag property for selectAll button
[selecAllButton addTarget:self action:#selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
selectAllButton.tag = 10000; // you can other tag number
4. Create buttonPressed: Handler
-(void) buttonPressed:(UIButton *)sender
{
if(sender.tag = 10000)
{
for (UIButton *button in self.menuButtons) {
if([button isKindOfClass:[UIButton class]]){
button.selected = YES;
}
}
} else
{
// handle other button actions
}
}