In my application I have a table view in second view controller. After some time I display an alert view using timer on which I have two buttons yes and no. When I click yes the alert view gets dismissed and when I click the no it should delete all items in table view and reload it.
Problem
I am not able to refresh the table view when I go to first view controller and return to second view controller.If I am in same view controller, it reloads perfectly.
Timer function
start_Timer = [NSTimer scheduledTimerWithTimeInterval:30 target:self selector:#selector(start_method) userInfo:nil repeats:NO];
Alert show
-(void)start_method
{
Timerfunction_alert = [[UIAlertView alloc] initWithTitle:#"" message:#"You have less than one minute before all items on your order list are released as it is about to exceed the 15-minutes hold time allocated to you to complete your order. Do you wish to continue ordering this item?"
delegate:self
cancelButtonTitle:#"NO"
otherButtonTitles:#"YES", nil];
[Timerfunction_alert show];
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (alertView == Timerfunction_alert)
{
if (buttonIndex == 0)
{
//here to refresh the table view
[self.tableview reloaddata]
}
}
}
try this:
[self performSelector:#selector(start_method) withObject:nil afterDelay:30];
My experience tells me that you should follow this snippet
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (alertView == paymentalert)
{
if (buttonIndex == 0)
{
// reload table after main thread gets over, sothat app doesn't crash
[self performSelectorOnMainThread:#selector(ReloadTable) withObject:nil waitUntilDone:YES];
}
}
}
//here to refresh the table view
-(void)ReloadTable
{
[self.tableview reloaddata]
}
[NSTimer scheduledTimerWithTimeInterval:30 target:self selector:#selector(start_method) userInfo:nil repeats:YES];
-(void)start_method
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"" message:#"You have less than one minute before all items on your order list are released as it is about to exceed the 15-minutes hold time allocated to you to complete your order. Do you wish to continue ordering this item?" delegate:self cancelButtonTitle:#"NO" otherButtonTitles:#"YES", nil];
alert.tag=1;
[alert show];
[alert release];
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (alertView.tag==1)
{
if (buttonIndex == 1)
{
//here to refresh the table view
[self.tableview reloaddata]
}
}
}
Related
I saw multiple questions about how to detect when the user is pressing the "Back" button on a UINavigationBar, but the answers does not solved my problem.
Indeed, I want to display a UIAlertView when user is pressing the UINavigationBar "Back" button, to ask him "Do you want to save the changes ?".
I can display a UIAlertView when the user is pressing the "Back" button (with the following snippet), but the previous view is popped in the same time. And I don't want this behaviour ! I just want that the app WAIT the user answer BEFORE pop the previous view...
-(void) viewWillDisappear:(BOOL)animated
{
if ([self isMovingFromParentViewController])
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Avertissement" message:#"Voulez-vous enregistrer les modifications effectuées ?" delegate:self cancelButtonTitle:#"Retour" otherButtonTitles:#"Oui", #"Non", nil];
[alert show];
}
[super viewWillDisappear:animated];
}
Thanks for you help...
I Suggest you using you own LeftbarButtonItem instead of default Back-button event at viewWillDisappear like this:-
- (void)viewDidLoad
{
UIBarButtonItem *left=[[UIBarButtonItem alloc]initWithTitle:#"Back" style:UIBarButtonItemStyleBordered target:self action:#selector(actionBack:)];
self.navigationItem.leftBarButtonItem = left;
[super viewDidLoad];
}
- (IBAction)actionBack:(id)sender {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Avertissement" message:#"Voulez-vous enregistrer les modifications effectuées ?" delegate:self cancelButtonTitle:#"Retour" otherButtonTitles:#"Oui", #"Non", nil];
[alert show];
}
And use alert Delegate clickedButtonAtIndex
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if(alertView.tag == 1)
{
// set your logic
}
}
I have a very simple process running where after each round of a simple game the scores are calculated, labels updated and all the normal, very simple stuff. I have a UIAlertView that informs the player of how s/he performed. I use a UIAlertViewDelegate to postpone all the updates, resetting of controls etc. till after the UIAlertView is dismissed. The methods are [startNewRound],[startOver] and [updateLabels]. It's fairly obvious what they all do. Anyway, when the user hits round ten, I've made another UIAlertView that informs the player that the game has ended and shows the overall score. Again, I hoped to use a delegate to postpone the resets till after the AlertView is dismissed. The only problem is, with the endGame AlertView, it seems to be using the first AlertView's delegate method causing the game to continue with a new round and not start from the beginning. I hope this makes sense. Anyway, here are snippets of my code.
if (round == 10){
UIAlertView *endGame = [[UIAlertView alloc]
initWithTitle: #"End of Game"
message: endMessage
delegate:self
cancelButtonTitle:#"New Game"
otherButtonTitles:nil];
[endGame show];
}
else {
UIAlertView *alertView = [[UIAlertView alloc]
initWithTitle: title
message: message
delegate:self
cancelButtonTitle:#"Next"
otherButtonTitles:nil];
[alertView show];
}
And then the delegate methods:
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
{
[self startNewRound];
[self updateLabels];
}
- (void)endGame:(UIAlertView *)endGame didDismissWithButtonIndex:(NSInteger)buttonIndex
{
[self startOver];
}
So there it is. As I mentioned, the endGame AlertView appears to be using alertView's delegate, thus not activating the [self startOver] method. All the methods are working, it's just the AlertView is using the incorrect delegate method. Regards, Mike
Change your code like this,
if (round == 10){
UIAlertView *endGame = [[UIAlertView alloc]
initWithTitle: #"End of Game"
message: endMessage
delegate:self
cancelButtonTitle:#"New Game"
otherButtonTitles:nil];
endGame.tag = 111;
[endGame show];
}
else {
UIAlertView *alertView = [[UIAlertView alloc]
initWithTitle: title
message: message
delegate:self
cancelButtonTitle:#"Next"
otherButtonTitles:nil];
alertView.tag = 222;
[alertView show];
}
and delegate method as,
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
{
if(alertView.tag == 111)
{
[self startNewRound];
[self updateLabels];
}
else if(alertView.tag == 222)
{
[self startOver];
}
}
You cant have two delegate method for dismisswithbuttonindex, you need to handle this situation with tag.
Give both alert view a different tag and check it on delegate object. Thus you can differentiat the both alert view.
I have a home view ,when click on that it is going to another view again i am going to another view.when click on a button on that view a modalview will appear and then subsequently 3 more modal views when click on each modalview.when click on the final modalview an alert will appear and when click on that alert i want to show the root homeview.Is it possible
?
Display AlertView using given code snippet:
UIAlertView* alert = [[UIAlertView alloc] initWithTitle:title message: #"Alert Message"
delegate: self cancelButtonTitle:#"Ok" otherButtonTitles: nil];
[alert show];
[alert release];
Delegate Method implementation :
(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
[self.navigationController popToRootViewControllerAnimated:YES];
}
Sample Code given below:
UIAlertView *alert = [[[UIAlertView alloc] initWithTitle:#"Alert Message?" message:#"Error......" delegate:self cancelButtonTitle:#"Cancel" otherButtonTitles:#"OK"] autorelease];
[alert show];
The implemention alertView's delegate functions is given below
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 0)
{
//cancel clicked ...do your action
}
else if (buttonIndex == 1)
{
//OK clicked
[self.navigationController popToViewController animated:YES];
}
}
just give the delegate in .h file and after in delegate method of alertview write bellow code..
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
if (buttonIndex == 1) {
[self.navigationController popToRootViewControllerAnimated:YES];///this line is important..
}
else{
// do your action...
}
}
i hope this answer is useful to you..
:)
int c=[self.navigationController.viewControllers count]-4;
[self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:c] animated:YES];
In my window base application I need to navigate to informationview from my appdelegate when i click on alert view button.
alert view works with NSlog.
But i need to push to the other view for this purpose i used
[self.navigationController pushViewController:info animated:YES];
but it doesn't pushes. just nslog only prints
- (void)applicationDidBecomeActive:(UIApplication *)application
{
//To count the number of launches
NSInteger i = [[NSUserDefaults standardUserDefaults] integerForKey:#"numOfCalls"];
[[NSUserDefaults standardUserDefaults] setInteger:i+1 forKey:#"numOfCalls"];
NSLog(#"the number of active calls are %d",i%3);
if(i%3==0 && i!=0)
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"you might prefer MedChart+" message:#"Get it now for more options" delegate:self cancelButtonTitle:#"Cancel" otherButtonTitles:#"Ok",nil];
[alert show];
[alert release];
}
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 0)
{
NSLog(#"canceled");
}
else if (buttonIndex == 1)
{
NSLog(#"Pushed to the information view ");
InformationViewCotroller *info = [[InformationViewCotroller alloc]initWithNibName:#"InformationViewCotroller" bundle:nil];
[self.navigationController pushViewController:info animated:YES];
}
}
(dont consider 'i' values it is part of my logic).
Thanks in advance
Before Navigate to any viewController , set the RootController for your navigationController of appDelegate.
Add navigationController.View as subview of window.Then your root controller will be the first ViewController.from there you can push to any viewController.
i need to show a confirm alert after the user press buttonIndex 1 but... if i use popViewcontroller in clickedButtonAtIndex it crash without errors.
The problem is that
[self.navigationController popViewControllerAnimated:YES];
is called before second Alert click...
how to fix?
This is my code:
- (void) alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
if (buttonIndex == 1) {
UIAlertView *alert =
[[UIAlertView alloc] initWithTitle:#"OK!"
message:#"Completed"
delegate:self
cancelButtonTitle:#"OK" otherButtonTitles:nil, nil];
[alert show];
[alert release];
[self.navigationController popViewControllerAnimated:YES];
}
}
Set the tag properties of the two UIAlertViews to 1 and 2, respectively. Then, in the delegate method, use if statements to check the tag of the UIAlertView argument.
Example:
- (void) alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (alertView.tag == 1)
{
//check the button index
//create and display the other alert view (set the tag property here to 2)
}
else if (alertView.tag == 2)
{
//pop the view controller
}
}