UIAlertView with UIAlertViewStyleSecureTextInput: clearing field after regain activity - ios

Question

I have UIAlertView with UIAlertViewStyleSecureTextInput style. It works perfect. But when application resign active, and then regain active, then text previously typed into text input... is still visible. But when i'm trying to append some next char, all previous text is suddenly gone.
what may be reason of this behavior, and how to change it?

Answer 1

It is the default behavior of UIAlertViewStyleSecureTextInput.
The functionality is similar in UITextField having property secureTextEntry set to YES.

Answer 2

FIRST WAY
in your ViewController.m
- (void)viewDidLoad
{
[super viewDidLoad];
alert = [[UIAlertView alloc]init];
[alert setDelegate:self];
[alert setAlertViewStyle:UIAlertViewStyleSecureTextInput];
[alert show];
}
- (void)setText
{
UITextField *txt = [alert textFieldAtIndex:0];
[txt setText:#""];
}
in your viewController.h
Set the delegate
#import "AppDelegate.h"
#interface ViewController : UIViewController <UIPopoverControllerDelegate,alerttext>
in your appdelegate.h
#protocol alerttext <NSObject>
- (void)setText;
#end
#import <UIKit/UIKit.h>
#class ViewController;
#interface AppDelegate : UIResponder <UIApplicationDelegate>
{
id <alerttext> delegate;
}
#property (strong, nonatomic) id <alerttext> delegate;
#property (strong, nonatomic) UIWindow *window;
#property (strong, nonatomic) ViewController *viewController;
#end
in your appDelegate.m
#synthesize delegate;
- (void)applicationDidEnterBackground:(UIApplication *)application
{
[self.viewController setText];
}
SECOND WAY
in your viewcontroller.m
UITextField *text;
#interface ViewController ()
#end
#implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
alert = [[UIAlertView alloc]init];
[alert setDelegate:self];
[alert setAlertViewStyle:UIAlertViewStyleSecureTextInput];
[alert show];
text = [alert textFieldAtIndex:0];
}
- (void)setText
{
[text setText:#""];
}
in your ViewController.h, just declare this method
- (void)setText;
in your appdelegate.m just place this
- (void)applicationDidEnterBackground:(UIApplication *)application
{
[self.viewController setText];
}