pickerView

-(void)viewDidLoad

{

NSString *path = [[NSBundle mainBundle] pathForREsource:@"data" ofType:@"plist"];

NSDictionary *dic = [[NSDIctionary alloc] initWithContentsOFFile:path];

self.subName = dic;

[dic release];

NSArray *keys = [[self.subName allKeys] sortedArrayUsingSelector:@selector(compare:)];

self.pickerData = keys;

NSString *selectedData = [self.pickerData objectAtIndex:0];

NSArray *array = [self.subName objectForKey:selectedData];

self.subData = array;

}

-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component

{

if(component == 0)

{

NSString *selectedData = [self.pickerData objectAtIndex:row];

NSArray *array = [self.subName objectForKey:selectedData];

self.subData = array;

[picker selectRow:0 inComponent:1 animated:YES];

[picker reloadComponent:1];

}

}