Question

Simple, but not working! Can someone please help? All I want is to just toggle the selection of a UIButton, with the code below:

-(IBAction) buttonPressed:(id)sender {
    if ([self.mybutton isSelected]) {
        NSLog(@"selected");
        [self.mybutton setSelected:NO];
    } else {
       NSLog(@"not selected");
        [self.mybutton setSelected:YES];
    }
    NSLog([self.mybutton isSelected] ? @"Yes" : @"No");
}

Though I press the button any number of times, every time, what gets printed is ‘not selected’ and ‘No’.
Why isn’t the UIButton getting set to ‘selected’ state?

Answer 1

As your code seems to be correct, you can make it simpler this way:

-(IBAction) buttonPressed:(UIButton *)sender {
   sender.selected = !sender.selected;
}

Why your code is not working properly? Probably self.mybutton is nil (you can check that out). Check your outlet connection and the property definition…
Ref.: Sending a message not a nil object, returns either nil or the default value if it’s a simple type (0 for int, NO for BOOL, etc..)