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.
Related
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];
I added a tabbar controller on MainWindow.xib which is displaying 5 tabs and have the tab bar controller's delegate method: shouldSelectViewController in my app delegate which returns boolean value (YES or NO).
In this delegate method, I am showing an alert to the user (if user is going from tab 1 to any other tab). This alert contains 2 buttons: OK and Cancel.
If user clicks on OK, then I want the delegate method to return YES (so that user can go to other tabs) and if user has selected Cancel (in case he wants to stay on tab 1 only), then I want the method to return NO.
So, basically i want the shouldSelectViewController method to stop executing till the time alert is present on screen. Is there any way I can return a BOOL from my alert view's delegate method which may, in turn, be returned by shouldSelectViewController OR any threading solution which may be of use for this situation??
try this
in .h
UIViewController *tmpController;
in .m
-(BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController {
tmpController = viewController;
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Title" message:#"Message" delegate:self cancelButtonTitle:#"Cancel" otherButtonTitles:#"OK", nil];
[alert show];
[alert release];
return NO;
}
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
if (buttonIndex) {
self.tabBarController.selectedViewController = tmpController;
}
}
i am working on a navigation based application.On the top of the navigation bar there is a by default back button option.i have implemented a uialertview on click event of the back button.
-(IBAction)gotolevelcontroller:(id)sender//method is declared in leftbarbuttonitem's action selector
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Exit" message:#"Do You want to exit?" delegate:self cancelButtonTitle:#"OK"
otherButtonTitles:#"Cancel", nil];
alert.delegate = self;
[alert show];
[alert release];
}
- (void)alertView:(UIAlertView *)alert clickedButtonAtIndex:(NSInteger)buttonIndex {
if (buttonIndex == 0)
{
//go to previous screen of navigation control.
//what is code to go to previous screen
NSLog(#"ok");
}
else
{
//remain on same screen of navigation control
NSLog(#"cancel");
}
}
any suggestions?
Thanks
Add this code
if (buttonIndex == 0)
{
[self.navigationController popViewControllerAnimated:YES];
}
You are looking for the poptoviewcontroller method of the navigation controller.
[self.navigationcontroller poptoviewcontroller:<prev-viewcontroler> animated:YES/NO];
Back button pops the current viewController.
so add :
[self.navigationController popViewController Animated:YES];
to buttonIndex == 0
and for cancel.. just type return;
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
}
}
I used to show a splash screen which in background load some data from web, I also check that if the location of the user is changed from one city to another city I want to show in alert to the user with the message that you are now in "CityName" would you like to see data from this city?
I have tabbed application and I have presented the splash screen as follow in the app delegate class.
SplashViewController *controller = [[SplashViewController alloc] initWithNibName:nil bundle:nil];
tabBarController.view.frame = [[UIScreen mainScreen] bounds];
controller.tabBarController = self.tabBarController;
[application setStatusBarStyle:UIStatusBarStyleBlackOpaque];
[window addSubview:controller.view ];
//[window addSubview:tabBarController.view ];
[self.tabBarController presentModalViewController:controller animated:YES];
[window makeKeyAndVisible];
[controller release];
Now when I show the alert screen it crash the application with "EXC_BAD_ACCESS" message and the stack trace show that _buttonClick is released in UIAlertView class.
Please advise what should I do, I also tried with UIActionSheet but the same problem with this thing too.
I think there is some problem with the model thing with the current view (SplashView).
Thanks in advance.
Are you trying to display your UIAlertView inside of your SplashViewController viewDidAppear? If not, I would try that first. I would also make sure you have your UIAlertView clickedButtonAtIndex method setup properly to try and trap what is going on.
UIAlertView *alert = [[UIAlertView alloc]
initWithTitle:#"Your Location Has Changed"
message:#"Your location has changed since you last opened opened THEAPP. Would you like to refresh your data?" delegate:self
cancelButtonTitle:#"Cancel"
otherButtonTitles:#"OK", nil];
alert.tag = 1;
[alert show];
[alert autorelease];
Then for the clickedButtonAtIndex method:
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
//--NSLog(#"You clicked button #%i",buttonIndex);
if (alertView.tag == 1){
if (buttonIndex == 0) {
//--NSLog(#"CANCEL");
} else if (buttonIndex == 1) {
//--NSLog(#"OK");
}
}
}
Doing all of this on a splash screen should be fine as long as you take into account the HIG's requirements for using the users location. Hope this helps!
I resolve this issue, the problem was that my Splash View was a modeled view and invoked by
[self.tabBarController presentModalViewController:controller animated:YES];
what I did that I shifted the data downloading to another view controller and there I can show alerts, and can handle that