Question

I have a very simple application that use a 2 component UIPickerView that causes me a crash every time I click over it. I dragged it into my view by IB, then hooked up dataSource and delegate to File’s Owner. In the .h file:

@interface SettingsViewController : UIViewController <UIPickerViewDataSource, UIPickerViewDelegate> {

While in .m

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)thePickerView { 
return 2;
}
- (NSInteger)pickerView:(UIPickerView *)thePickerView numberOfRowsInComponent:(NSInteger)component {
NSInteger value;

if (component == 0) {
    value = [tipiDado count];
} else {
    value = [numeroDadi count];
}

return value;
}

- (NSString *)pickerView:(UIPickerView *)thePickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
if (component == 0) {
    return [tipiDado objectAtIndex:row];
} else {
    return [numeroDadi objectAtIndex:row];
}
}

- (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component { 
NSLog(@"Selected Dice: %@. Number of Dice: %@", [tipiDado objectAtIndex:row], [numeroDadi objectAtIndex:row]);
}

I dunno why it continues to give me SIGBART or EXC_BAD_ACCESS… I don’t know where I’m doing wrong.

Suggestions?

Thanks folks.

Answer 1

It’s difficult to answer properly without seeing some more code. When it crashes, you should be able to see exactly what line is causing the crash (look at the call stack on the left). My guess is that either one of your arrays (tipiDado or numeroDadi) are not retained properly or else that the objects stored in them are not of type NSString.

If you update the question with the code you use to initialize them, it will be easier to point out the exact problem.