CODEWITHSUNDEEP
iosswiftcrashselector
Marco Castano
Marco Castano

Reputation: 150

IOS swift app crash tapping in textfields (NSNull length - unrecognized selector to instance)

Swift app crashes when typing on every textfield

Everything goes unless a textfield get tapped. When I tap textfields in the same view all it's ok but when I change view and so have another controller and tap in any textfield app crash.

Stack trace:

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSNull length]: unrecognized selector sent to instance

Upvotes: 0

Views: 678

Answers (1)

Aeradriel
Aeradriel

Reputation: 1232

It looks like your UITextField has some value (maybe textField.text) that has not the correct type. The length method is often used on NSString and causes crashed when used on some others types that do not implement it (e.g. NSNumber). I advise you to double check your UITextField to see if all your values are those that are meant to be.

EDIT : I just re-read your post. It looks like you are passing nil or an NSNull object to textField.text (maybe in textFieldDidBeginEditing which causes the crash. Change this to pass a String and it should fix it.

Upvotes: 0

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