uialertview - How to disable alertview's button in iPhone? -

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i have alert view having 2 buttons "ok" , "cancel" , textfield. want disable "ok" button until user enter text in textfield. how can this? in advance

you can create 2 buttons ok , cancel.then add 2 sub views in uialertview.now checking text(text length) in textfield,you can perform enable , disable actions.


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