How to access a UITextField which is on a subview of a UIAlertView

i had a alertview 开发者_C百科with a textfield as a subview,,i want to submit gmail through this textfield with alertview button,but how can acess the textfield

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Confirm with UITextFieldDelegate and implement the below function in your class,

– textField:shouldChangeCharactersInRange:replacementString:
– textFieldShouldClear:
– textFieldShouldReturn:

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Use delegate methods to access the subviews of Alertview.