CODEWITHSUNDEEP
iphoneios
user1825440
user1825440

Reputation: 75

How to add the data received from UIAlertview text field to a local variable?

I have button set up, and when it gets clicked, an alertview will appear with a text field. I want to get the data from that variable and trigger an addition function which adds the value of the text field to a local variable and displays the data in a label. How can I do that?

Upvotes: 2

Views: 401

Answers (3)

Caleb
Caleb

Reputation: 125007

You need to set a delegate for the alert view, and that object should adopt the UIAlertViewDelegate protocol. The delegate will then receive a -alertView:willDismissWithButtonIndex: message before the alert is dismissed. Your delegate's implementation of that method can get the text from whatever text fields are in the alert -- use -textFieldAtIndex: to get the different text fields.

Upvotes: 0

Jai Govindani
Jai Govindani

Reputation: 3211

I'm assuming you've already got the UIAlertView with a UITextField (either using the UIAlertViewStyleSecureTextInput, UIAlertViewStylePlainTextInput, or UIAlertViewStyleLoginAndPasswordInput).

I'm also going to assume that you've set up the UIAlertViewDelegate so that it gets called properly when a button on the UIAlertView is pressed. So, to get the value of the UITextField, in your alertView:clickedButtonAtIndex: you add the following code (assuming only one UITextField - if you have multiple, just change the parameter passed to textFieldAtIndex:

NSInteger textFieldValueAsInteger = [[alertView textFieldAtIndex:0].text integerValue];
NSInteger finalValue = textFieldValueAsInteger + someOtherIntegerThatYouAlreadyDeclared;

Displaying it largely depends on your your UILabel etc are set up, but basically:

UILabel *labelToDisplayResults = [[UILabel alloc] initWithFrame:self.view.frame];
[self.view addSubview:labelToDisplayResults];

[labelToDisplayResults setText:[NSString stringWithFormat:@"%d", finalValue]];

That should do it. Let me know if you have any other follow-up questions.

Upvotes: 0

Rob
Rob

Reputation: 437622

Set the delegate property of UIAlertView and have that object conform to UIAlertViewDelegate. Namely, respond to alertView:clickedButtonAtIndex:, during which you can inquire regarding textFieldAtIndex.

Upvotes: 1

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