AlertView with TextField Problem - iphone

Question

Hey guys, I'm having trouble obtaining the value/text from a AlertView TextField. Maybe someone can look at my code and see what I'm doing wrong. Every time I press OK, the label get's a (null) value. I must be missing something here.
TextFieldINAlertViewController.h
#import <UIKit/UIKit.h>
#interface TextFieldInAlertViewController : UIViewController {
UITextField *myTextField;
IBOutlet UILabel *labelView;
NSString *FieldStr1;
}
#property (nonatomic, copy) NSString *FieldStr1;
#end
TextFieldInAlertViewController.m
#import "TextFieldInAlertViewController.h"
#implementation TextFieldInAlertViewController
#synthesize FieldStr1;
- (void)viewDidLoad {
[super viewDidLoad];
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Enter Name Here" message:#"blank" delegate:self cancelButtonTitle:#"Dismiss" otherButtonTitles:#"OK!", nil];
UITextField *myTextField = [[UITextField alloc] initWithFrame:CGRectMake(12, 45, 260, 25)];
CGAffineTransform myTransform = CGAffineTransformMakeTranslation(0, 60);
[alert setTransform:myTransform];
[myTextField setBackgroundColor:[UIColor whiteColor]];
[alert addSubview:myTextField];
[alert show];
[alert release];
}
-(void)alertView:(UIAlertView *)alert clickedButtonAtIndex:(NSInteger)index
{
if (index == 0){
return;
}
if (index == 1){
FieldStr1 = myTextField.text;
labelView.text = [NSString stringWithFormat:#"%#" , FieldStr1 ];
}
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
- (void)viewDidUnload {
}
- (void)dealloc {
[super dealloc];
}
#end

Answer 1

myTextField is a local variable in viewDidLoad, but it's also a member variable in your class. Get rid of the local declaration, and you should be fine. Also, I'd move this code to viewDidAppear:, rather than viewDidLoad.

Answer 2

Since iOS5 you can use property on the alertView which is a much simplier way to add a textField.
If you want to add a TextField to an UIAlertView, you can use this property (alertViewStyle) for UIAlertView:
- (void)showAlert{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Title" message:#"Message" delegate:self cancelButtonTitle:#"Done" otherButtonTitles:nil];
alert.alertViewStyle = UIAlertViewStylePlainTextInput;
((UITextField *) [alertView textFieldAtIndex:0]).text = #"Default Value";
[alert show];
}
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
NSLog(#"%#", [alertView textFieldAtIndex:0].text);
}
Check UIAlertView reference: http://developer.apple.com/library/ios/#documentation/uikit/reference/UIAlertView_Class/UIAlertView/UIAlertView.html
Hugues