I'm trying to implement my own basic radio buttons, such that only one of them can be selected at a time. Here's the code I'm using->
- (IBAction)btn2Pressed:(UIButton *)sender {
[btn1 setBackgroundImage:[UIImage imageNamed:@"circle-uncheck.png"] forState:UIControlStateNormal];
btn2pressed = YES;
btn1pressed = NO;
}
- (IBAction)btn1Pressed:(UIButton *)sender {
[btn2 setBackgroundImage:[UIImage imageNamed:@"circle-uncheck.png"] forState:UIControlStateNormal];
btn1pressed = YES;
btn2pressed = NO;
}
But it's not working, ie the image of the other button isn't changing. :(
I'm not able to figure out what I'm doing wrong.
When you press any of the 2 buttons, you set the background image to circle-uncheck.png
. How is it ever be changed to checked
? It will stay unchecked
forever, I guess.
EDIT (due to you comment below):
If you set the background images initially in the Interface Builder, they will be changed to circle-uncheck.png
as soon as a button is pushed, and they are apparently never be set to the checked
state.
You had to modify your code to something like
- (IBAction)btn2Pressed:(UIButton *)sender {
[btn1 setBackgroundImage:[UIImage imageNamed:@"circle-uncheck.png"] forState:UIControlStateNormal];
[btn2 setBackgroundImage:[UIImage imageNamed:@"circle-check.png"] forState:UIControlStateNormal];
btn2pressed = YES;
btn1pressed = NO;
}
- (IBAction)btn1Pressed:(UIButton *)sender {
[btn2 setBackgroundImage:[UIImage imageNamed:@"circle-uncheck.png"] forState:UIControlStateNormal];
[btn1 setBackgroundImage:[UIImage imageNamed:@"circle-check.png"] forState:UIControlStateNormal];
btn1pressed = YES;
btn2pressed = NO;
}
If you don't wish to use a UISegmentedControl
, I would create a IBOutletCollection
and link all of your radio buttons to it.
@property(nonatomic, strong) IBOutletCollection(UIButton) NSArray *radioButtons;
In Interface builder I would set a selected state background image and an normal state background image.
Or in code something like:
[btn1 setBackgroundImage:[UIImage imageNamed:@"circle-uncheck.png"] forState:UIControlStateNormal];
[btn1 setBackgroundImage:[UIImage imageNamed:@"circle-check.png"] forState:UIControlStateSelected];
Then I would create one control function:
-(IBAction)didSelectRadioButton:(id)sender
{
for(UIButton *button in self.radioButtons){
button.selected = NO;
}
UIButton *selectedButton = (UIButton *)sender;
selectedButton.selected = YES;
}
A simple radio solution using UIButtons, and scalable :)
W
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