Is there is a way to use an Action sheet to navigate to another view?
I have a button - "Go" and an Action sheet that asks "Do you want to proceed?" and in it "Yes" and "Cancel"
Can I can navigate to another view when pressing yes?
Yes, it is possible. To do this, the viewController that represents the UIActionSheet needs to adopt UIActionSheetDelegate. Upon dismissing the action sheet with either Yes or Cancel, - actionSheet:didDismissWithButtonIndex: method gets called, and from there you can navigate to another view or just ignore it.
References:
http://developer.apple.com/library/ios/#documentation/uikit/reference/UIActionSheet_Class/Reference/Reference.html#//apple_ref/occ/cl/UIActionSheet
http://developer.apple.com/library/ios/#documentation/uikit/reference/UIModalViewDelegate_Protocol/UIActionSheetDelegate/UIActionSheetDelegate.html
Edit:
#interface MyViewController : UIViewController <UIActionSheetDelegate>
-(IBAction)showActionSheet:(id)sender;
#end
#implementation MyViewController
-(IBAction)showActionSheet:(id)sender {
UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:#"Do you want to procced?" delegate:self cancelButtonTitle:#"Cancel" destructiveButtonTitle:#"YES" otherButtonTitles:nil];
[actionSheet showInView:self.view];
}
-(void) actionSheet: (UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex {
switch (buttonIndex) {
case 0: {
// for illustration
// let's assume (1) you have a navigation controller
// (2) you are using storyboard
// (3) in the storyboard, you have a viewController with identifier MyChildViewControllerIdentifier
MyChildViewController *mcvc = [self.storyboard instantiateViewControllerWithIdentifier:#"MyChildViewControllerIdentifier"];
[self.navigationController pushViewController:mcvc animated:YES];
break;
}
default:
break;
}
}
P.S. I didn't run it, if there is any error, let me know to fix it.
Dismiss the actionsheet and then [self presentmodalviewcontroller:myview animated:yes]
Related
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)
My app is crashing in the iPad simulator when I press the action button again once it has already been pressed to open my activity view. I am concerned that this will be an issue if the user wants to press the button again to close the Popover rather than touching outside of it. Any suggestions are appreciated :)
FYI the Action button is a UIToolbar button.
In the .h
#property (strong, nonatomic) UIPopoverController *popup;
#property (strong, nonatomic) UIPopoverController *activityViewProp;
In the .m:
-(IBAction)openUIActivityView:(id)sender {
UIActivityViewController *activityView = [[UIActivityViewController alloc]initWithActivityItems:#"Hello World" applicationActivities:nil];
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) {
[self presentViewController:activityView animated:YES completion:^{
}];
} else {
self.popup = [[UIPopoverController alloc] initWithContentViewController:activityView];
[self.popup presentPopoverFromBarButtonItem:sender permittedArrowDirections:UIPopoverArrowDirectionDown animated:YES]; }}
Just check if you already have a popup, and do something else
-(IBAction)openUIActivityView:(id)sender {
if (self.popup) {
[self.popup dismiss ...];
}
else {
// show popup code
}
}
The problem is, a view controller can only present one other view controller at any given time. Currently, when your tap the button a second time, you try to present a new instance of UIActivityViewController, while an other is already presented.
You can fix this, by checking the value of your main view controller's presentedViewController property. If it is not nil (and actually of type UIActivityViewController) you can return from the action without doing anything:
- (IBAction)openUIActivityView:(id)sender {
if (!self.presentedViewController) {
// We have no presented view controller yet.
// <your current code here>
} else {
// We are already presenting a view controller.
// Either dismiss it, or don't do anything.
}
I am implementing an alert view after the user clicks on the 'destructButton' in an action sheet. Code snippet as below:
-(void)actionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex
{
if (buttonIndex != actionSheet.cancelButtonIndex)
{
UIAlertView *alert = [[UIAlertView alloc]
initWithTitle:#"Something happened!"
message:nil
delegate:nil
cancelButtonTitle:#"Phew!"
otherButtonTitles:nil];
}
[alert show];
[alert release];
}
I have already included the UIActionSheetDelegate protocol in my .h file
#interface Control_FunViewController : UIViewController <UIActionSheetDelegate> {
UITextField *nameField;
UITextField *numberField;
UILabel *sliderLabel;
UISwitch *leftSwitch;
UISwitch *rightSwitch;
UIButton *doSomethingButton;
}
But when I click on the destructButton in the actionsheet, nothing happens. Am I missing something here?
Thanks
Zhen
Your delegate needs to implement actionSheet:clickedButtonAtIndex:.
Action sheet will be dismissed after actionSheet:clickedButtonAtIndex: and after that the delegate will receive actionSheet:didDismissWithButtonIndex: .
From Apple Action Sheet Delegate Protocol reference
... the delegate must implement the
actionSheet:clickedButtonAtIndex:
message to respond when those buttons
are clicked; otherwise, your custom
buttons do nothing. The action sheet
is automatically dismissed after the
actionSheet:clickedButtonAtIndex:
delegate method is invoked.
You can have a look at example projects that use UIActionSheet like GenericKeychain :
// Action sheet delegate method.
- (void)actionSheet:(UIActionSheet *)actionSheet
clickedButtonAtIndex:(NSInteger)buttonIndex
{
// the user clicked one of the OK/Cancel buttons
if (buttonIndex == 0)
{
[passwordItem resetKeychainItem];
[accountNumberItem resetKeychainItem];
[self.tableView reloadData];
}
}
You have added UIActionSheetDelegate on .h file. Not this only enough. You also have to set delegate for the UIActionSheet object. Refer this below coding:
-(void)showActionSheet
{
UIActionSheet *action =[[UIActionSheet alloc]initWithTitle:#"dsfs" delegate:self cancelButtonTitle:#"First Btn" destructiveButtonTitle:#"Dest Btn" otherButtonTitles:nil];
[action showInView:self.view];
}
In that code, I have set the delegate of UIActionSheet to self, this works if you have added this method on your ViewController (Control_FunViewController).
I'd like to call a method
[self someMethod:bar]
But how can I open an AlertView before? someMethoud should wait for AlterView OK-Button. Do i need to write a complex task manager? Or is there a smart solution?
display the alert, and when the user clicks the button, then call your method.
remember to add the delegate to your class
#interface YourViewController : UIViewController <UIAlertViewDelegate>
code in your controller
// display the alert
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:#"Alert" message:#"Message"
delegate:self cancelButtonTitle:#"Ok" otherButtonTitles:nil];
[alert show];
[alert release];
}
// UIAlertViewDelegate method - get the click here and take action
- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
if (buttonIndex == 0) {
// ok button pushed
[self someMethod:bar];
}
}
You would need to implement the delegate method didDismissWithButtonIndex here http://developer.apple.com/library/ios/ipad/#documentation/UIKit/Reference/UIAlertViewDelegate_Protocol/UIAlertViewDelegate/UIAlertViewDelegate.html
The, depending on the button that was tapped, you would call your method.
Having a simple Navigation Controller in place (starting the Navigation Based Application project) I created a new View with a XIB file.
on my HomeViewController (Home screen with all options as UIButton's I have:
#implementation HomeViewController
-(IBAction) optionChoosed:(UIButton *)button
{
NSString *msg = [NSString stringWithFormat:#"Button: %d", button.tag];
UIAlertView *alert=[[UIAlertView alloc] initWithTitle:#"Hi" message:msg delegate:nil cancelButtonTitle:#"Go away" otherButtonTitles:nil];
switch (button.tag) {
case 13:
// Simple Search
[self loadSimpleSearch]; break;
default:
[alert show];
break;
}
[alert release];
}
-(void)loadSimpleSearch
{
SimpleSearchViewController *controller =
[[SimpleSearchViewController alloc] initWithNibName:#"SimpleSearchViewController" bundle:nil];
[self.navigationController pushViewController:controller animated:YES];
[controller release];
}
witch works great!
it Pushes the View into the front of the stack!
Now, because in my 2nd view SimpleSearchViewController I have self.title = #"myTitle"; I get the Title in the NavigationBar as well the back button (as I have the same setting on the HomeViewController)
I thought that the NavigationViewController would handle the pop of the current view, but it does not.
What do I have to do, to pop the SimpleSearchViewController?
Where do I use [self.navigationController popViewControllerAnimated:YES];
as the view continues there, and ViewDidUnload is never called.
My idea was that this should be handle in the first ViewController, the HomeViewController but I have no idea what is the method I should hook to, and I read the documentation and I can't figure it out :-/
Any help is greatly appreciated, thank you.
HomeViewController
alt text http://cl.ly/XNS/Screen_shot_2010-04-21_at_22.38.51.png
SimpleSearchViewController
alt text http://cl.ly/YDw/Screen_shot_2010-04-21_at_22.40.00.png
SimpleSearchViewController after pressing the Back button
alt text http://cl.ly/XLO/Screen_shot_2010-04-21_at_22.40.21.png
To add the image from a comment that asks if HomeViewController as the root controller for the NavigationViewController
Not sure if this helps but when implementing navigationItem in code, if you don't call the super the popping functionality will not be present
-(UINavigationItem*) navigationItem
{
UINavigationItem* item = [super navigationItem];
item.title = #"search";
return item;
}