ios datepicker crashes randomly - ios

Question

I have a UIDatepicker and it crashes randomly in iOS7. At the simulator, the UIDatepicker works perfectly but on the real device always crash. The error is EXC_BAD_ADRESS but the Xcode doesn't give me more information.
Please help me!
My code is:
VistaRuedaViewController.h
#interface VistaRuedaViewController : UIViewController <UITableViewDataSource, UITableViewDelegate,UITabBarControllerDelegate, UITabBarDelegate>
{
NSString *fecha;
Utilidades *util;
BOOL conexion;
UIDatePicker *datePicker;
}
#property (nonatomic, retain) IBOutlet UIButton *button;
#property (nonatomic, retain) IBOutlet UITableView *table;
#property (nonatomic, strong) IBOutlet UIDatePicker *datePicker;
#property (nonatomic, retain) IBOutlet UILabel *labelAviso;
#property (nonatomic, retain) IBOutlet UITabBar *tabbar;
-(IBAction)SelectSend:(id)sender;
#end
VistaRuedaViewController.m
- (void)viewDidLoad
{
...
datePicker = [[UIDatePicker alloc]init];
[datePicker setDate:[NSDate date]];
self.datePicker.minimumDate = [NSDate date];
datePicker.datePickerMode = UIDatePickerModeDate;
...
}
-(IBAction)SelectSend:(id)sender{
UIDatePicker *dp = (UIDatePicker *) sender;
//[table reloadData];
NSDateFormatter *formatter=[[NSDateFormatter alloc]init];
[formatter setLocale:[NSLocale currentLocale]];
[formatter setDateFormat:#"dd/MM/yyyy"];
fecha =[formatter stringFromDate:dp.date];
NSLog(#"FECHA DATAPICKER: %#", dp.date);
NSString *idioma;
NSString *currentL = [Global sharedMySingleton].test;
if([currentL isEqualToString:#"ca-ES"]){
idioma = #"ca";
}
else
{
idioma = currentL;
}
button.enabled = NO;
NSString *PlaningURLString = [NSString stringWithFormat:#"%#%#/PlaningHorario", NSLocalizedString(#"protocolo", #""), NSLocalizedString(#"servidor", #"")];
util = [[Utilidades alloc]init];
conexion = [util testInternetConnection];
if (conexion) {
Planing_pasarela *cargaPlaning = [[Planing_pasarela alloc] init];
[cargaPlaning NSURLConnectionFunction:PlaningURLString:fecha:fecha:idioma];
int ret =[cargaPlaning comprobarFlag];
button.enabled = YES;
if (ret==1) {
[table reloadData];
NSLog(#"DATAPICKER: %#", fecha);
}else{
// Usuario y token incorrectos
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:AMLocalizedString(#"logoutAlert", #"") message:AMLocalizedString(#"logout", #"") delegate:self cancelButtonTitle:#"OK" otherButtonTitles:nil, nil];
alert.tag = 1;
[alert show];
}
}
}
Thank you for advance.

Answer 1

#property (nonatomic, strong) IBOutlet UIDatePicker *datePicker;
Why it's strong when other oultest is retain. You are using ARC or what?
If you use ARC, than all oultets shold be strong, if not then retain.
And if you use outlet, you don't need allocate it: datePicker = [[UIDatePicker alloc]init];
Use everywhere seld.datePicker instead datePicker.
You don't need UIDatePicker *datePicker; inside #interface VistaRuedaViewController ...{ }
If App is non-ARC, then you need release formatter and util