objective c - how to handle key events in iphone -

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hi working on iphone application , want handle keyboard events in iphone. in mac, there class nsevent handles both keyboard , mouse events, , in ios (iphone/ipad) counterpart of nsevent uievent handles touch events. know ios api not provide functionality, how can handle key events in iphone??? tutorial or sth, started...

you cant directly code keyboad;s key , there no mouse in case of device.

you can make logics different kind of charectersets or can make logics in textfield delgate methods or textview delegates method

textview delegate

- (bool)textview:(uitextview *)textview shouldchangetextinrange:(nsrange)range replacementtext:(nsstring *)text

textfield delegate

- (bool)textfield:(uitextfield *)textfield shouldchangecharactersinrange:(nsrange)range replacementstring:(nsstring *)string

you can use notification textfield , textview.

for textfield use this

call register method in viewdidload

-(void)registerfortextfieldnotifications {      nsnotificationcenter *notificationcenter = [nsnotificationcenter defaultcenter];      [notificationcenter addobserver:self                            selector:@selector (handle_textfieldtextchanged:)                                name:uitextfieldtextdidchangenotification                              object:self.textfield];  }   - (void) handle_textfieldtextchanged:(id)notification {        if([isinappobj.passcodestring isequaltostring:locktextfield.text])     {            //code here     }  }

and text view need change event name this

[notificationcenter addobserver:self                                selector:@selector (handle_textfieldtextchanged:)                                    name:uitextviewtextdidchangenotification                                  object:self.textfield];

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