ios datepicker随机崩溃

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

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 .

2. And if you use outlet, you don't need allocate it: datePicker = [[UIDatePicker alloc]init];

3. Use everywhere seld.datePicker instead datePicker .

4. You don't need UIDatePicker *datePicker; inside @interface VistaRuedaViewController ...{ }
5. If App is non-ARC, then you need release formatter and util