using the debugger I've ensured [alertView show]; is being called, but the dialog is not viewable, what else do I need to do to get it to show?
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
{
if( [[userInfo objectForKey:#"aps"] objectForKey:#"alert"] != NULL)
{
NSString *msg = [[userInfo objectForKey:#"aps"] objectForKey:#"alert"];
if(msg != nil) {
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:#"Usage Alert"
message:msg delegate:self cancelButtonTitle:#"Cancel" otherButtonTitles:#"Ok", nil];
[alertView show];
}
}
}
In your view controller .h file, you need to declare the <UIAlertViewDelegate> Like this, before the opening curly braces, encapsulated with greater than and less than symbols:
#import <UIKit/UIKit.h>
#interface YourViewControllersName : UIViewController <UIAlertViewDelegate> {
// your variable declarations are here...
}
// your method declarations are here...
Sorry everyone, this turned out to be an issue with my compiler/xCode not actually recognizing the code I had put in or something along those lines, the environment was broken.
Related
I have iphone app in which i enter any number value like 10 2 0 1 0.2 etc i want that instead of this if user enter any text it should alert that enter a number.
UIAlertView * alert = [[UIAlertView alloc] initWithTitle:#"Error" message:#"Value Must Be In Number " delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil];
[alert show];
[alert release];
try this code:
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
if (textField==txtMobileNo)
{
[self validatePhone];
}else
{
[textField resignFirstResponder];
}
// called when 'return' key pressed. return NO to ignore.
return YES;
}
- (BOOL) validatePhone
{
NSString *phoneRegex = #"^+(?:[0-9] ?){6,14}[0-9]$";
NSPredicate *phoneTest = [NSPredicate predicateWithFormat:#"SELF MATCHES %#", phoneRegex];
if ([phoneTest evaluateWithObject:txtMobileNo.text] == YES)
{
NSLog(#"proper phone nO ");
return YES;
}
else
{
UIAlertView *alert=[[UIAlertView alloc] initWithTitle:nil message:#"Please,Enter Your Person proper phone no" delegate:self cancelButtonTitle:#"Dismiss" otherButtonTitles:nil ];
[alert show];
[alert release];
NSLog(#"phone no. not in proper format");
return NO;
[txtMobileNo becomeFirstResponder];
}
}
I hope you helpful.
That disrupts the app kind of, doesn't it? What you want to look at is the UITextfield delegate methods. Set your viewController as the textields delegate and make it respond o UITextFieldDelegate protocol.
I would implement the textField:shouldChangeCharactersInRange:replacementString method and check the replacementString for unwanted characters.
But rather than displaying an alert, I guess I would just return NO if unwanted characters are contained there. Then, when the user enters something other than what you want, nothing happens.
you can check if it is a number using the following:-
NSString *yourString= #"121212";
NSCharacterSet *decimalNUmSet= [NSCharacterSet decimalDigitCharacterSet];
BOOL isNum= ([[yourString stringByTrimmingCharactersInSet:decimalNUmSet] isEqualToString:#""] ||
[[yourString stringByTrimmingCharactersInSet:decimalNUmSet] isEqualToString:#"."]);
here the second part includes decimal numbers also.
the other way is to present a numeric keyboard to user so that he can type only numbers.
You validate the entered character and do your logic in this delegate ,
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{
// your logic to restriction goes here.like check the entered char and through alert
}
-(BOOL) validateNumericValue:(NSString*) textValue
{
NSNumberFormatter* numberFormatter = [[[NSNumberFormatter alloc] init] autorelease];
NSNumber* number = [numberFormatter numberFromString:textValue];
if (number != nil)
{
return YES;
}
return NO;
}
I'm currently working in Xcode on an iOS app...
I've set up a UIAlertView (with a question as the message ) to pop up with a text field to retrieve a response.
The desired functionality is that upon entering an incorrect value into the text field, the UIAlert would loop... Until the correct response is entered. At this point, the UIAlert would be dismissed.
Heres what I have so far...
- (void)application:(UIApplication *)application
didReceiveLocalNotification:(UILocalNotification *)notification {
NSString* correctAnswer = #"2";
UIAlertView *alert = [[UIAlertView alloc]
initWithTitle:#"Alarm"
message:#"1 + 1 ="
delegate:self
cancelButtonTitle: nil
otherButtonTitles:#"Continue", nil ];
alert.alertViewStyle = UIAlertViewStylePlainTextInput;
UITextField* answerField = [alert textFieldAtIndex:0];
answerField.keyboardType = UIKeyboardTypeNumberPad;
answerField.placeholder = #"answer";
[alert show];
// I feel like this would work, but I know it doesn't...
NSString *answerFieldString = answerField.text;
if ([answerFieldString isEqualToString: correctAnswer ])
{
[alert dismissWithClickedButtonIndex:-1 animated:YES];
}
}
I've done extensive google searching and can't come up with a solution... Any responses would be much appreciated!
try this...
- (BOOL)alertViewShouldEnableFirstOtherButton:(UIAlertView *)alertView
{
NSString *answerFieldString = answerField.text;
if ([answerFieldString isEqualToString: correctAnswer ])
{
[alertView dismissWithClickedButtonIndex:-1 animated:YES];
}
}
Hi to all of stackoverflow,
i'm Italian so, i'm sorry for my bad English... :D
i tried to create a simple tableView for listing a few names and a number... all with core data.
- (void)tableView:(UITableView *)tableView
didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
Track *track = [[self fetchedResultsController] objectAtIndexPath:indexPath];
if(YES == self.editing) {
UIAlertView* alert = [[UIAlertView alloc] initWithTitle:#"Modifica nome" message:#"Prego, inserire di seguito il nuovo nome:" delegate:self cancelButtonTitle:#"Annulla" otherButtonTitles:#"Salva", nil];
newname = [[alert addTextFieldWithValue:track.name label:#"Nome"] text];
[alert textField].autocorrectionType = UITextAutocorrectionTypeNo;
[alert show];
[alert release];
[selectedTrack release];
} else {
UIAlertView* alert = [[UIAlertView alloc] initWithTitle:#"Aggiungi minchiate" message:#"Sei sicuro di voler aggiungere una michiata a" delegate:self cancelButtonTitle:#"Annulla" otherButtonTitles:#"Salva", nil];
newname = [[alert addTextFieldWithValue:track.trackAbstract label:#"Minchiate"] text];
[alert textField].autocorrectionType = UITextAutocorrectionTypeNo;
[alert show];
[alert release];
[selectedTrack release];
}
}
I want to send the value of the textfield to my attributes that i've created first...
Need I put the code in this method?!
- (void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex
{
if (buttonIndex != [alertView cancelButtonIndex])
{
//HERE?!
}
}
And how i can set a new value on a core data attribute?
ANY help is appreciated... Thanks in advance!
Yes, you would put the code to grab the value from the text field in the alertView:willDismissWithButtonIndex:
method. Assuming you've created a model class for that entity (which I assume you have, as I see a class called Track in your code), you can set the value of an attribute by using dot syntax:
Track.someAttribute = newValue
Or without dot syntax, it would be [Track setSomeAttribute:newValue].
Also, note that UIAlertView's addTextFieldWithValue:label: is an undocumented method, which isn't a problem if this is an app you're planning to create just for yourself, but using it in an app submitted to the App Store will likely get it rejected.
I'm sick of writing basic UIAlertView's, ie:
UIAlertView *alert = [[UIAlertView alloc] initWith...]] //etc
Instead of doing this, is it possible to put all this in a "helper" function, where I can return the buttonIndex, or whatever an alert usually returns?
For a simple helper function I guess you could feed parameters for the title, message, I'm not sure whether you can pass delegates in a parameter though, or bundle info.
In pseudo-code, it could be like this:
someValueOrObject = Print_Alert(Title="", Message="", Delegate="", Bundle="") // etc
Any help on this would be great.
Thanks
In 4.0+ you can simplify the alert code using blocks, a bit like this:
CCAlertView *alert = [[CCAlertView alloc]
initWithTitle:#"Test Alert"
message:#"See if the thing works."];
[alert addButtonWithTitle:#"Foo" block:^{ NSLog(#"Foo"); }];
[alert addButtonWithTitle:#"Bar" block:^{ NSLog(#"Bar"); }];
[alert addButtonWithTitle:#"Cancel" block:NULL];
[alert show];
See Lambda Alert on GitHub.
This is what I wrote, when I got sick of doing the same:
-(void)alert:(NSString *)title withBody:(NSString *)message firstButtonNamed:(NSString *)firstButtonName {
[self alert: title withBody: message firstButtonNamed: firstButtonName withExtraButtons: nil informing: nil];
}
-(void)alert:(NSString *)title withBody:(NSString *)message firstButtonNamed:(NSString *)firstButtonName informing:(id)delegate {
[self alert: title withBody: message firstButtonNamed: firstButtonName withExtraButtons: nil informing: delegate];
}
-(void)alert:(NSString *)title withBody:(NSString *)message firstButtonNamed:(NSString *)firstButtonName withExtraButtons:(NSArray *)otherButtonTitles informing:(id)delegate {
UIAlertView *alert = [[UIAlertView alloc]
initWithTitle: title
message: message
delegate: delegate
cancelButtonTitle: firstButtonName
otherButtonTitles: nil];
if (otherButtonTitles != nil) {
for (int i = 0; i < [otherButtonTitles count]; i++) {
[alert addButtonWithTitle: (NSString *)[otherButtonTitles objectAtIndex: i]];
}
}
[alert show];
[alert release];
}
You can't write a function that will display an alert and then return a value like a buttonIndex though, because that value-returning only occurs when the user presses a button and your delegate does something.
In other words, the process of asking a question with the UIAlertView is an asynchronous one.
In this:
-(IBAction)buttonClick: (id)sender {
UIActionSheet *actionSheet = [[UIActionSheet alloc]
initWithTitle:#"Fo Sho?"
delegate:self
cancelButtonTitle:#"Cancel"
destructiveButtonTitle:#"fo sho"
otherButtonTitles:nil];
[actionSheet showInView:self.view];
}
A UIButton would be linked to this "buttonClick" IBAction but what is "self"?
self is the equivalent to this in many other languages such as C++. In other words when you call [myString length], the self pointer inside the length message is the pointer to your string named myString.
-(void)logScore
{
NSLog(#"%# score is %d", self.name, self.score);
}
[player logScore];
In the example, self is the player object.