iphone - Custom NavigationItem's TouchUpInside Event is outside boundaries -

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i'm using custom uibarbuttonitem replace leftbarbuttonitem, when press outside of button, within around 20 pixels of button, detects button being pressed.

here's code:

- (void)changenavbarbuttons {     uibutton *backbutton = [[uibutton alloc] initwithframe:cgrectmake(0, 0, 44, 44)];     [backbutton setbackgroundimage:[uiimage imagenamed:@"navbarback.png"] forstate:uicontrolstatenormal];     [backbutton addtarget:self action:@selector(popviewcontroller) forcontrolevents:uicontroleventtouchupinside];      uibarbuttonitem *backitem = [[uibarbuttonitem alloc] initwithcustomview:backbutton];      uibarbuttonitem *negativespacer = [[uibarbuttonitem alloc]                                        initwithbarbuttonsystemitem:uibarbuttonsystemitemfixedspace                                        target:nil action:nil];     negativespacer.width = -5;      self.navigationitem.leftbarbuttonitems = [nsarray                                               arraywithobjects:negativespacer, backitem, nil];    self.navigationitem.hidesbackbutton = yes; }

the negativespacer move button 5 pixels left.

what causing this?

it default behaviour of uinavigationbarbutton item. it's ease of use. navigation bar @ top tends mean people tap lower may expect. leave gap there, or have sufficiently large hit area user stabbing finger towards middle of "below nav bar" item avoid dead area.


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