ios - How to disable copy/paste option in UITextfield in ios7 -

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i tried 

@implementation uitextfield (disablecopypaste)  -(bool)canperformaction:(sel)action withsender:(id)sender {  return no; return [super canperformaction:action withsender:sender];  }  @end

but disables textfield's copy/paste option,how disable menu options specific textfield.

i think method ok,since no making of category etc.it works fine me.

    [[nsoperationqueue mainqueue] addoperationwithblock:^{         [[uimenucontroller sharedmenucontroller] setmenuvisible:no animated:no];     }];     return [super canperformaction:action withsender:sender];

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