Question

I have text bot i want that when i enter any value like 3 in that then it should mulitpy by 12 and display 36 on button title automatically when i enter any number in text field the title should change i am adding following code but it alwasy shows zero i am adding this code in viewdidLoad

     float monthText = [[monthTextField text] floatValue];
    float year=12;

float monthButtonTitle=monthText*year;


NSString *titleMonth = [NSString stringWithFormat:@"%d",monthButtonTitle];


[monthButton setTitle:titleMonth forState:UIControlStateNormal];

Answer 1

Add action to your textfield like this

[yourTextField addTarget:self action:@selector(textFieldTextDidChange:) forControlEvents:UIControlEventEditingChanged];

Then implement method textFieldTextDidChange: like this

- (void) textFieldTextDidChange:(UITextField *)tf {
    float monthText = [[tf text] floatValue];
    float year=12;
    float monthButtonTitle=monthText*year;
    NSString *titleMonth = [NSString stringWithFormat:@"%d",monthButtonTitle];
    [monthButton setTitle:titleMonth forState:UIControlStateNormal];
}