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Editorial Team
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Asked: 2026-05-28T01:48:52+00:00

On an iPad running iOS 4.3.5 I get this error: MonoTouch.Foundation.MonoTouchException: Objective-C exception thrown.

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On an iPad running iOS 4.3.5 I get this error:

MonoTouch.Foundation.MonoTouchException: Objective-C exception thrown.  Name: NSInvalidArgumentException Reason: -[UITextField hasText]: unrecognized selector sent to instance 0x6f692d0
  at MonoTouch.UIKit.UITextField.get_HasText () [0x00000] in <filename unknown>:0

And indeed looking at Apple’s documentation, there is no “hasText” for UITextField. But it works, at least on iOS5 devices.
What is going on here? MT is 5.0.1 and the deployment target is set to 4.3. Is this selector new in iOS 5? But why is not documented?

René

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1 Answer

  1. Editorial Team

    Shivan is right — HasText is a MonoTouch thing.

    Here is one place where HasText is listed (it was introduced in MonoTouch between 4.2 & 5.0): http://ios.xamarin.com/Releases/MonoTouch_5/API-diff-from-4.2

    If you want HasText, you need to run on iOS 5.0 & newer.

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