IOS : Best practices for Fields Validation on User Interface

Question

In my app I want to validate user inputs in the fields. For Example

If textfields is empty. Or email is in correct format

I don't want to add validation logic in ViewController, Neither I want to pass UIView to a Validator Class

I have multiple screens like this.

Any suggestion for best ways validating Screens.

I would create a validator class for every field. and pass either the string from the field or the field self. Why don't you want to do that? — vikingosegundo, Jan 25 '16 at 07:04

score 2 · Answer 1 · answered Jan 25 '16 at 07:04

2

what you can do is create category class of UIView and write instance method like

Validation+UIView

+(BOOL)isEmpty:(NSString *)string{
    // snippet to check empty validation and return value.
    }


+(BOOL)emailValidation:(NSString *)string{
// snippet to check email validation and return value.

}

Now use this instance method on your view.

if(![yourview isEmpty]){
// all good ...
}

answered Jan 25 '16 at 07:04

KDeogharkar

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Its better to add category in UITextField.Rather then in UIView. My guess – Muhammad Zohaib Ehsan Jan 25 '16 at 07:07
2

yes it is but by using UIView he can also check validation for UITextView as because he want validation globally. – KDeogharkar Jan 25 '16 at 07:08
Creating a category for validation (better). Thanks – Irfan Jan 25 '16 at 07:23

score 1 · Accepted Answer · answered Jan 25 '16 at 07:03

1

If you are targeting it for multiple scenes then it is good to have a validator class for all your UITextFields. I have written a UITextField validator class which is very simple to use. You can modify it as you want. Take a look. Best luck

answered Jan 25 '16 at 07:03

iAnurag

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Only this class will be enough. All you have to do is just put this class as your all textField's superclass. – iAnurag Jan 25 '16 at 07:16

IOS : Best practices for Fields Validation on User Interface

2 Answers2