I've been looking all over the internet for a solution to this problem, yet to find one that I can understand. So here it goes.
I have my iOS application, on which on the first launch of the application, will display a UIAlertView. I want one of the buttons to send the user to a new viewController to view some essential information.
I have gotten my UIAlertView configured properly, here's the code for the actionSheet:
- (void)alertView:(UIAlertView *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
if (buttonIndex == 0)
{
//Code to open a new viewController???
}
if (buttonIndex == 1)
{
//User can exit the application if they do not wish to continue
exit(0); }
}
}
I have a viewController created named webViewViewController, that's what I want users to reach when they tap the first button. Any ideas on how to do this? I have ARC disabled, other 'solutions' i've come across keep giving me errors.
Thanks all, would appreciate some guidance here.
If your current viewcontroller is in a Navigation Controller:
UIViewController *myViewController = [[UIViewController alloc] init];
myViewController.title = #"My First View";
//to push the UIView.
[self.navigationController pushViewController:myViewController animated:YES];
And never use exit(0)!
- (void)alertView:(UIAlertView *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
if (buttonIndex == 0)
{
NewViewController *controller=[[NewViewController alloc]initWithNibName:#"NewViewController" bundle:nil];
self.modalTransitionStyle=UIModalTransitionStyleCrossDissolve;
[self presentViewController:controller animated:YES completion:nil];
}
drasick has given sufficient answer but if you need to use model view controller refer above.
Use:
UIViewController *yourViewController = [[UIViewController alloc] init];
[self.navigationController presentModalViewController:myViewController animated:YES];
to push a modalViewController.(This is depriciated in iOS 6, but will work)
Related
I'm at a stage in my coffee order app where I have a UIAlertView pop up from a DetailViewController asking a yes/no to proceed. The 'yes' goes to the next View Controller, which is fine, but the 'no' also goes to the same view controller, but I just want it to return to the DetailViewController, to give the user the option to change their order. I'm using if statements as you can see in the code, but the following code comes up with the "Unexpected interface name 'DetailViewController':expected expression message"
I am new to this, a student learning, and while there are tutorials out there, this one piece of code in my second 'if' statement for buttonIndex ==1 should be correct according to a few solutions on this site, but for some reason, I'm missing something here. I'm using XCode v7.0.1, and am also having difficulty finding up to date solutions for this version.
(note I am aware of the deprecated code for the UIAlertView, but it is working)
Here is the code, appreciate some help:
#import "DetailViewController.h"
#interface DetailViewController ()
#end
#implementation DetailViewController
#synthesize YourOrder;
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.DetailTitle.text = _DetailModule[0];
self.DetailDescription.text = _DetailModule[1];
self.DetailImageView.image = [UIImage imageNamed:_DetailModule[2]];
self.navigationItem.title = _DetailModule[0];
self.YourOrder.text = #"";
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
- (IBAction)addItem:(id)sender {
self.YourOrder.text = [NSString stringWithFormat:#"%# \n %#",
self.YourOrder.text, [sender currentTitle]];
}
- (IBAction)alertView:(id)sender {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Send Order" message:#"Are you happy with your order?" delegate:self cancelButtonTitle:#"Yes" otherButtonTitles:#"No",nil];
[alert show];
}
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
// the user clicked Yes
if (buttonIndex == 0)
{
// do something here...
}
// the user clicked No - need to write code to return a 'no' click to the DetailViewController to try again.
if (buttonIndex == 1)
{
[self presentViewController:DetailViewController animated:YES completion:nil];
}
}
#end
I have also tried:
if (buttonIndex == 1)
{
DetailViewController *detailView = [[DetailViewController alloc] init];
[self presentViewController:detailView animated:YES completion:nil];
}
but it still goes to the same View controller and I see the "Warning: Attempt to present on whose view is not in the window hierarchy!" error message.
I am displaying aNavController as a modalViewController in a specific frame CGRectMake(40,50, 400, 500). Which is working fine. Now I have a button in self (viewcontroller on which modalViewController is presented), on pressing that button I need to display some message on aNavController. But problem is when I am presenting a modalViewController. Whole screen area got dimmed/disabled. So, not able to touch/click that button in self.
Here is my code to present a view controller. I thought, I am missing something here. Please Help. Thanks in advance.
aNavController.modalPresentationStyle = UIModalPresentationFormSheet;
anavController.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
[self presentModalViewController:aNavController animated:YES];
aNavController.view.superview.frame = CGRectMake(40,50, 400, 500);
presentModalViewController create a modal dialog. When modal view controller is up, users can't do any thing on parent view until the the modal view is dismissed.
The problem is you're instantiating a UIAlertView at the same time as the presentModalViewController call your modal view in UIAlertView's delegate method clickedButtonAtIndex.
Like so:
- (IBAction)clickedMyButton:(id)sender
{
UIAlertView *alertView = [[UIAlertView alloc]
initWithTitle: #"Title"
message: #"Message"
delegate:self
cancelButtonTitle:#"Close Button"
otherButtonTitles:#"Modal Button", #"Some Other Button", nil];
[alertView show];
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
if (buttonIndex == 0) {
NSLog(#"User Selected Cancel");
}
else if (buttonIndex == 1) {
NSLog(#"Modal Button Clicked");
aNavController.modalPresentationStyle = UIModalPresentationFormSheet;
anavController.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
[self presentModalViewController:aNavController animated:YES];
aNavController.view.superview.frame = CGRectMake(40,50, 400, 500);
}else {
NSLog(#"Some Other Button Clicked");
}
}
Or, if you wish for your UIAlertView to show on top of your navigation controller, ignore the above and simply wait to call your alert until the navigation controllers - (void)viewDidAppear:(BOOL)animated method.
In addition, I recommend you change your frame to stay within the bounds of the screen unless absolutely necessary. ex: CGRectMake(40, 50, 320, 480);
Finally, I am able to do workaround the things which work same way as a UIModalPresentationFormSheet.
I added the aNavController as a subview to the [[UIApplication sharedApplication] keyWindow] and which solves my all the problems.
Thank you all for your comments.
I have an app with a tab bar controller (2 tabs). In one tab view controller, a button leads to an alert window. I want one button of the alert window to call a table view containing possible answers. I want that table view to have a done button and a title. I think that means a navigation controller has to be used. But most everything I can find on navigation controllers assumes a much more complicated situation. Here's part of the alert window logic:
-(void) alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 2) {
AnswersViewController *aVC = [[AnswersViewController alloc] init];
[self presentViewController:aVC
animated:YES
completion:NULL];
}
}
And AnswersViewController looks like this:
#interface AnswersViewController : UITableViewController
#end
#implementation AnswersViewController
- (id) init
{
self = [super initWithStyle:UITableViewStylePlain];
return self;
}
- (id) initWithStyle:(UITableViewStyle)style
{
return [self init];
}
- (void)viewDidLoad
{
[super viewDidLoad];
[[self view] setBackgroundColor:[UIColor redColor]];
}
#end
This code all works as expected (an empty red UITableView appears).
Two questions I guess: 1. Is there a simple modification to what I have that can give me a done button and title in my table view? 2. If I have to go to a navigation controller (probably), how can I make a bare-bones navigation controller with a done button and title and embed the table view within it? Oh, and I want to do this programatically. And I think I prefer the done button and title to be in the navigation bar, no tool bar desired. Thanks!
To get what you are looking for, you do need to use a UINavigationController. That will provide the UINavigationBar where you can display a title and also buttons.
To implement this with a UINavigationController, you want to do smoothing like this (assuming you are using ARC, so you don't need to worry about memory management):
-(void) alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 2) {
AnswersViewController *aVC = [[AnswersViewController alloc] init];
//Make our done button
//Target is this same class, tapping the button will call dismissAnswersViewController:
aVC.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:#selector(dismissAnswersViewController:)];
//Set the title of the view controller
aVC.title = #"Answers";
UINavigationController *aNavigationController = [[UINavigationController alloc] initWithRootViewController:aVC];
[self presentViewController:aNavigationController
animated:YES
completion:NULL];
}
}
Then you would also implement - (void)dismissAnswersViewController:(id)sender in the same class as the UIAlertView delegate method (based on the implementation I have here).
Hope this helps!
I want to open a UIViewController if a UIALertView Button is pressed.
I have the code for that. However, the uiviewcontroller is not being opened :(
I am sure the uialertview is working fine and all. and the code for the uiviewcontroller is fine as well. (it works when called from other places).
Any help ?
Thanks.
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 0) //Yes, Sign Me Up!
{
NSLog(#"0");
ViewerWebController *web = [[ViewerWebController alloc] initWithURL:[NSURL URLWithString:#"http://www.funimation.com/"]];
[web setShowToolbar:YES];
[self.navigationController pushViewController:web animated:YES];
[web release];
}
else if (buttonIndex == 1) //Remove from List
{
NSLog(#"1");
[[NSUserDefaults standardUserDefaults] setBool:false forKey:#"subscribeButtonOption"];
[_tableView reloadData];
}
else if (buttonIndex == 2) //"Maybe Later"
{
NSLog(#"2");
}
}
The alert view doesn't have a navigation controller. You would need to keep a reference to the navigation controller you want to push the view controller on to.
This may work..
- (void)alertView:(UIAlertView *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
// the user clicked one of the OK/Cancel buttons
if (buttonIndex == 0)
{
YourRootNavigationController *navController = [YourRootNavigationController sharedInstance]; // singleton
[navController pushViewController:YOUR_CONTROLLER animated:YES];
}
else
{
NSLog(#"cancel");
}
}
Use didDismissWithButtonIndex rather clickedButtonAtIndex.
The former is invoked after the UIAlertView has been removed from the screen hierarchy, while the latter occurs while the UIAlertView is still on screen. While on screen, UIAlertView alters the nature of the app; that means bad things happen when trying to push views to the nav controller.
This misuse of clickedButtonAtIndex seems to be common misinformation floating around the internet and StackOverflow. Cost me hours of frustration.
This is probably going to be very obvious, but here goes. I have two ViewControllers, one that shows the details of a person with a [+] button that opens up another ViewController that manages the edits of the Person. When the person about to be deleted, an alert is presented and if OK is selected, the edit view should disappear and the DetailView should also disappear/transition back to the PersonsListView (not shown in code below).
I can get the EditView to dismiss, but I can't get the DetailView to dismiss as well.
Any help is appreciated.
The two ViewControllers:
#implementation PersonDetailViewController
...
- (void)editPerson
{
PersonDetailEditViewController *editView = [[PersonDetailEditViewController alloc] initWithTenant:self.person];
[editView setModalTransitionStyle:UIModalTransitionStyleCrossDissolve];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:editView];
[self presentModalViewController:navController animated:YES];
}
...
#end
and
#implementation PersonDetailEditViewController
...
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == 1) {
[Person deletePerson:self.person];
NSError *error;
[self.person.managedObjectContext save:&error];
[[self navigationController] dismissModalViewControllerAnimated:YES];
// *** HERE I ALSO WANT TO DISMISS THE DETAILVIEW ***
}
}
...
#end
Assuming that PersonDetailViewController is presented in a navigation controller you should be able to do what you want by adding the following line:
[self.navigationController popViewControllerAnimated:YES];