How to change a image when when we click a button? - ios

Question

I'm working with radio buttons, for this i'm writing code like this.
float x = 40;
float y = 0;
for (int i=0; i<self.radioBtnTagArr.count; i++) {
self.radioButton = [UIButton buttonWithType:UIButtonTypeCustom];
self.radioButton.frame = CGRectMake(x, y+35, 35.0, 35.0);
[self.radioButton setImage:[UIImage imageNamed:#"radio_empty.png"] forState:UIControlStateNormal];
[self.radioButton addTarget:self action:#selector(radioBtnMethod:) forControlEvents:UIControlEventTouchUpInside];
[self.scrollView addSubview:self.radioButton];
self.radioButton.tag = [[self.radioBtnTagArr objectAtIndex:i] intValue];
y = y+70;
}
This "self.radioBtnTagArr" comes from server (tags comes from server), based on that count i want to create radio buttons and i'm assigning tag that tags to radio buttons.
- (void) radioBtnMethod:(UIButton *)sender {
for (int i=0; i<self.radioBtnTagArr.count; i++) {
if (sender.tag == [[self.radioBtnTagArr objectAtIndex:i] intValue]) {
[self.radioButton setImage:[UIImage imageNamed:#"radio.png"] forState:UIControlStateSelected];
[self.radioButton setSelected:YES];
}
}
}
Now the problem is when i click first radio button the last radio button was selected like this below image...
I want only when we click first button first button state selected, if we click second button second button state selected like this...

Answer 1

do like create another one array for save the UIbutton, for e.g
Step-1
#property (nonatomic, strong) NSMutableArray *buttonArray;
step-2
add the all buttons to buttonArray
// allocate the memory for your array
buttonArray = [NSMutableArray array];
for (int i=0; i<self.radioBtnTagArr.count; i++) {
// create instance value of UIButton
UIButton *radioButton = [UIButton buttonWithType:UIButtonTypeCustom];
radioButton.frame = CGRectMake(x, y+35, 35.0, 35.0);
[radioButton setImage:[UIImage imageNamed:#"radio_empty.png"] forState:UIControlStateNormal];
[radioButton addTarget:self action:#selector(radioBtnMethod:) forControlEvents:UIControlEventTouchUpInside];
[self.scrollView addSubview:self.radioButton];
y = y+70;
// add the object to array
[buttonArray addObject:radioButton];
}
step-3
inside the target
- (void) radioBtnMethod:(UIButton *)sender {
// reset the previous selection
for (UIButton *getradioButton in buttonArray) {
[getradioButton setImage:[UIImage imageNamed:#"radio_empty.png"] forState:UIControlStateNormal];
}
// set the current selection
[sender setImage:[UIImage imageNamed:#"radio.png"] forState:UIControlStateNormal];
}