Convert UITextField to float

Question

Hello I am trying to set the user input from a UITextField set to Decimal Pad to have a float equal to that amount.

//
//  ViewController.h
//  tiptest
//
//  Created by NUGZ on 1/23/14.
//  Copyright (c) 2014 NUGZ. All rights reserved.
//

#import <UIKit/UIKit.h>

float tipAmount1;
float tipAmount2;
float tipAmount3;
float tipAmount4;

@interface ViewController : UIViewController {

IBOutlet UITextField *tip1;
IBOutlet UITextField *tip2;
IBOutlet UITextField *tip3;
IBOutlet UITextField *tip4;

IBOutlet UILabel *total;

}

-(IBAction)tally:(id)sender;

@end

In the implementation file I have tried doing the following:

- (void)viewDidLoad
{

    tipAmount1 = [tip1 floatValue];

    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

But it is telling me "No visible @interface for 'UITextField' declares the selector 'floatValue'. Any ideas? I am trying to eventually make it so I can have multiple UITextFields that take the input into floats and then add all the floats for a total.

Do not use `floatValue` to convert user-entered text to a `float`. It won't work for many users. Use an `NSNumberFormatter` instead. — rmaddy, Jan 23 '14 at 20:01

score 1 · Answer 1 · answered Jan 23 '14 at 19:42

1

tipAmount1 = [[tip1 text] floatValue]; An UITextField isn't just a NSString. It has a text where you can put the string.

answered Jan 23 '14 at 19:42

Larme

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score 1 · Answer 2 · edited Jan 23 '14 at 20:02

1

- (void)viewDidLoad {
    tipAmount1 = [tip1.text floatValue];

    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

edited Jan 23 '14 at 20:02

rmaddy

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answered Jan 23 '14 at 19:43

Giuseppe Mosca

1,323
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Using this method it isn't returning the value inserted into the UITextField, just 0.000000 when the tally button method is called. -(IBAction)tally:(id)sender { total.text = [NSString stringWithFormat:@"%f", tipAmount1]; } – stickynugz Jan 23 '14 at 20:50

Convert UITextField to float

2 Answers2