I have a UIAlertView with UIAlertViewStyleSecureTextInput. When the user taps "Login" and the password is correct, it will push the next ViewController. If the password is incorrect, it displays another UIAlertView prompting a single "Dismiss" button. What I am trying to do is when the user taps the return key, the "Login" button will be triggered. As it sits now, when the return key is pressed the alert just dismisses, regardless if the password is correct or not. Maybe there is a more logical solution than what I have attempted? Sorry if the title is a little confusing, I don't know how else to explain it. Any help is greatly appreciated. Thanks.
I have declared the first alert in my .h file, and conformed to the UIAlertViewDelegate and UITextFieldDelegate:
#interface EndViewController : UIViewController <UIAlertViewDelegate, UITextFieldDelegate>
#property (retain, strong) UIAlertView *loginRequiredMsg;
Method for the "Login" alert:
- (IBAction)resultsBtnPressed:(UIButton *)sender {
self.loginRequiredMsg = [[UIAlertView alloc]initWithTitle:#"Login Required"
message:#"Please enter the admin password"
delegate:self
cancelButtonTitle:#"Cancel"
otherButtonTitles:#"Login", nil];
self.loginRequiredMsg.alertViewStyle = UIAlertViewStyleSecureTextInput;
[self.loginRequiredMsg textFieldAtIndex:0].delegate = self;
[self.loginRequiredMsg show];
}
Method for dismissing the keyboard when return key is tapped (I think I need to somehow call the next alert here if the password is incorrect, as currently it just dismisses the alert):
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
// Dismiss keyboard when return key is pressed
[self.loginRequiredMsg dismissWithClickedButtonIndex:self.loginRequiredMsg.firstOtherButtonIndex animated:YES];
return YES;
}
And finally the method containing the outcome of the password entered:
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
NSString *title = [alertView buttonTitleAtIndex:buttonIndex];
if([title isEqualToString:#"Login"]) {
UITextField *password = [alertView textFieldAtIndex:0];
// Basic login authentication
if ([password.text isEqualToString:#"admin"]) {
// Allocate & initialise ViewController
ResultsViewController *Results = [[ResultsViewController alloc]initWithNibName:#"ResultsViewController" bundle:nil];
// Push next ViewController
[self.navigationController pushViewController:Results animated:YES];
NSLog(#"Show results");
} else {
UIAlertView *errorMsg = [[UIAlertView alloc]initWithTitle:#"Error"
message:#"Admin password is incorrect. Please try again."
delegate:self
cancelButtonTitle:#"Dismiss"
otherButtonTitles:nil];
[errorMsg show];
}
}
}
As discussed in the comments, you need to implement alertView:didDismissWithButtonIndex: which tells you when the alert view has been dismissed. When you tap the return key, it calls that method with the index of the OK button.
Related
So I have two different UIAlertViews in the same view controller and both alerts can be triggered at the same time. When both alerts are triggered, both alerts pop up at the same time, with the alerts being layered on top of each other. Is there a way to stagger the alerts so that when the first alert comes up, the second alert will not pop up until the user dismisses the first alert? For my code, this is the format I'm using
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:#"ERROR!"
message:#"Error message here!"
delegate:self
cancelButtonTitle:#"Ok"
otherButtonTitles:nil];
[alertView show];
try the following:
create two properties
#property (weak, nonatomic) UIAlertView *visibleAlertView;
#property (strong, nonatomic) UIAlertView *pendingAlertView;
every time when you want to present an alertview from your code make a check
UIAlertView *newAlertView = [[UIAlertView alloc] init...
if (self.visibleAlertView) {
self.pendingAlertView = newAlertView;
} else {
self.visibleAlertView = newAlertView;
[newAlertView show];
}
and finally:
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
if (self.pendingAlertView) {
UIAlertView *newAlertView = self.pendingAlertView;
self.pendingAlertView = nil;
self.visibleAlertView = newAlertView;
[newAlertView show];
}
}
hope that helps :)
EDIT
you could even stack the pending alertviews:
#property (strong, nonatomic) NSMutableArray *pendingAlertViews;
...
self.pendingAlertViews = [NSMutableArray array];
before presenting an alertview:
UIAlertView *newAlertView = [[UIAlertView alloc] initWithTitle:#"Title" message:#"Message" delegate:self cancelButtonTitle:#"Ok" otherButtonTitles:nil];
if (self.visibleAlertView) {
[self.pendingAlertViews addObject:newAlertView];
} else {
self.visibleAlertView = newAlertView;
[newAlertView show];
}
and in dismiss:
if (self.pendingAlertViews.count > 0) {
UIAlertView *av = self.pendingAlertViews.firstObject;
[self.pendingAlertViews removeObjectAtIndex:0];
self.visibleAlertView = av;
[av show];
}
hope it helps :)
Why don't you make a class level variable that indicates an alertView is open. Then before you open one you check that variable and if it's set you don't pop up the second one. Instead you could have it set another variable that indicates the second box should pop up. Then in the - alertView:clickedButtonAtIndex: method you can pop up the second one if the second variable is set.
I think I am pretty late for this but still posting as It might be useful for someone looking for this.
I have created a AQAlertAction subclass for UIAlertAction. You can use it for staggering Alerts, the usage is same as you are using UIAlertAction. All you need to do is import AQMutiAlertFramework in your project or you can include class also (Please refer Sample project for that). Internally It uses binary semaphore for staggering the Alerts until user handle action associated with current alert displayed. Let me know if it works for you.
I Created Password Validation. Password created successfully it will show one UIAlertView and press when user presses the OK, the Password Text field will get clear. How to do that? Please any Example?
Add UIAlertViewDelegate protocol:
#interface YourViewController : UIViewController <UIAlertViewDelegate>
Show Alert View using :
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"TITLE_HERE"
message:#"ALERT_MESSAGE HERE."
delegate:self
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
[alert show];
After user presses OK, this method will called automatically:
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
// the user clicked OK
if (buttonIndex == 0) {
// do something here...
yourTextField.text = nil;
}
}
Your question is not clear. If you want the password field text to be empty after displaying the UIAlert, please add the following code to make your password filed empty.
yourTextField.text = ""
Here's an example.
if(passwordValid==YES)
{
UIAlertView *passwordValidated = [[UIAlertView alloc] initWithTitle:#"Password Validated!"
message:#"Your password is successfully validated. Press OK to continue"
delegate:nil
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
yourTextField.text = "";
[updateMessage show];
So I have the following code and when the round is over it pops up with the following UIAlertView. Now when the user pushes the leaderboards button I want it to run the - (void) statement I have that displays the leaderboards. Please not that this is all inside of a sprite kit view controller. How should I do this?
Also I have my void statement in a different class, is there anyway to bring that over via an #import?
- (void) gameEnded
{
// indicate our game state as stopped
_gameState = STOPPED;
// create a message to let the user know their score
NSString *message = [NSString stringWithFormat:#"You scored %d this time", _score];
// show the message to the user
UIAlertView *av = [[UIAlertView alloc] initWithTitle:#"Game over!"
message:message
delegate:nil
cancelButtonTitle:#"Ok"
otherButtonTitles:#"Leaderboards",nil];
[av show];
// reset the score tracker for the next game
_score = 0;
//reset playing area
[self removeAllBlocks];
[self addBlocks];
}
Here:
// show the message to the user
UIAlertView *av = [[UIAlertView alloc] initWithTitle:#"Game over!"
message:message
delegate:nil
cancelButtonTitle:#"Ok"
otherButtonTitles:#"Leaderboards",nil];
You need to set the delegate to 'self', or another class that you want be handling the alert view events as its delegate. That class must conform to the UIAlertViewDelegate, for example:
#interface YourController : YourControllerSuperClass <UIAlertViewDelegate>
Then, Xcode will probably suggest you to implement:
– alertView:clickedButtonAtIndex:
As this is the method called by the alert view on its delegate when a button is pressed.
Here you'll receive a reference to your alert view and the index of the pressed button.
With this, you can find which action was performed.
For example:
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
// In case there are more then one alert view and a reference to each of the alert views are kept.
if(alertView == self.avAlertView){
switch(buttonIndex){
// Your button's cases!
}
}
}
Your current Controller should implement UIAlertViewDelegate, and call the method alertView:clickedButtonAtIndex: with the index of your leaderboard button.
Your CustomController.h:
#import <UIKit/UIKit.h>
#interface AdsEventViewController : UITabBarController<UIAlertViewDelegate>
#end
Your CustomController.m:
[...]
- (void) gameEnded
{
// indicate our game state as stopped
_gameState = STOPPED;
// create a message to let the user know their score
NSString *message = [NSString stringWithFormat:#"You scored %d this time", _score];
// show the message to the user
UIAlertView *av = [[UIAlertView alloc] initWithTitle:#"Game over!"
message:message
delegate:nil
cancelButtonTitle:#"Ok"
otherButtonTitles:#"Leaderboards",nil];
[av show];
// reset the score tracker for the next game
_score = 0;
//reset playing area
[self removeAllBlocks];
[self addBlocks];
}
[...]
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
if(buttonIndex == _LEADERBOARD_BUTTON_INDEX_ ){
// leaderboard method
}
}
I have an IF statement that checks labels to see if a label is empty, if it is show an alert.
if ([_DOBDate.text length] == 0)
{
UIAlertView *message = [[UIAlertView alloc] initWithTitle:#"Cannot Proceed"
message:#"Please Submit your DOB and Gender"
delegate:nil
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
[message show];
}
later on in the function I have perform segue, like this :
[self performSegueWithIdentifier:#"SetUptoMain" sender:self];
True, the alert does fire when the label is blank, but it also performs the segue. This perform segue line is not in the IF statement. So I would have thought it would have ran the IF statement and stayed there till I pressed OK. OK would be staying on the same view controller.
The segue is performed, is this due to Blocks ? any advice ?
So if the USER pressed Ok from the UIAlert the VC does not move, it stays where it was so the user can enter the details required.
This is my code :
- (IBAction)SettingsSave:(id)sender {
if ([_DOBDate.text length] == 0)
{
UIAlertView *message = [[UIAlertView alloc] initWithTitle:#"Cannot Proceed"
message:#"Please Submit your DOB and Gender"
delegate:self
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
[message show];
}
more code...
then at the end
[self performSegueWithIdentifier:#"SetUptoMain" sender:self];
}
thanks
Seems to be an if/else logic issue. Read about it.
-(IBAction)yourAction:(id)sender
{
if ([_DOBDate.text length] == 0)
{
//Show your AlertView as you did
}
else
{
//put the rest of your code, including the performSegue
}
}
UIAlertView doesn't block execution. It runs asynchronously. Therefore the code path will go into your if statement, then continue past it.
If you only want the segue to be performed after the user presses the alert view button then you need to implement UIAlertViewDelegate.
In your header file add something like this:
#interface MyController : UIViewController <UIAlertViewDelegate>
When you create the alert view do it like this:
UIAlertView *message = [[UIAlertView alloc] initWithTitle: #"Cannot Proceed"
message: #"Please Submit your DOB and Gender"
delegate: self
cancelButtonTitle: #"OK"
otherButtonTitles: nil];
[message show];
And add this method to implement the UIAlertViewDelegate.
- (void) alertView: (UIAlertView *) alertView clickedButtonAtIndex: (NSInteger) buttonIndex {
// perform segue here. You can also check what button was pressed based on the button index.
}
I have a delegate, which recives a message to delete a item with that item as an argument.
I want to show a confirmation AlertView, and then, if the users press Yes, i want to delete it.
So, what I have is
The delegate method that gets called:
- (void) deleteRecording:aRecording(Recording*)aRecording {
NSLog(#"Cancel recording extended view");
UIAlertView *alert = [[UIAlertView alloc]
initWithTitle: NSLocalizedString(#"Cancel recording",nil)
message: NSLocalizedString(#"Are you sure you want to cancel the recording?",nil)
delegate: self
cancelButtonTitle: NSLocalizedString(#"No",nil)
otherButtonTitles: NSLocalizedString(#"Yes",nil), nil];
[alert show];
[alert release];
}
And the method thats checks which button has been pressed:
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
switch (buttonIndex) {
case 0:
{
NSLog(#"Delete was cancelled by the user");
}
break;
case 1:
{
NSLog(#"Delete deleted by user");
}
}
}
So, my question is, how can i send the aRecording parameter from the first method to the second?
Thanks a lot
Store that variable in a member variable (easiest solution)
If you are only passing an int variable, you can set AlertView tag
property.
myAlertView.tag = YOUR_INT;
According to the documentation,
Note : The UIAlertView class is intended to be used as-is and does not support subclassing. The view hierarchy for this class is
private
and must not be modified.
So please use the 3rd method only if you are not intending to submit
app to app store. Thanks user soemarko ridwan for the tip.
For passing complex objects, subclass UIAlertView, add an object
property
#interface CustomAlertView : UIAlertView
#property (nonatomic, retain) id object;
#end
#implementation CustomAlertView
#synthesize object;
- (void)dealloc {
[object release];
[super dealloc];
}
#end
When you create AlertView
CustomAlertView *alert = [[CustomAlertView alloc]
initWithTitle: NSLocalizedString(#"Cancel recording",nil)
message: NSLocalizedString(#"Are you sure you want to cancel the recording?",nil)
delegate: self
cancelButtonTitle: NSLocalizedString(#"No",nil)
otherButtonTitles: NSLocalizedString(#"Yes",nil), nil];
[alert setObject:YOUR_OBJECT];
[alert show];
[alert release];
In the delegate
- (void)alertView:(TDAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
NSLog(#"%#", [alertView object]);
}