NavigationItem 点击范围更改

UIButton*button = [UIButtonbuttonWithType:UIButtonTypeCustom];

[buttonsetTitleEdgeInsets:insets];

[buttonsetFrame:CGRectMake(0,0,44,30)];

[buttonaddTarget:selfaction:actionforControlEvents:UIControlEventTouchUpInside];

[buttonsetTitle:textforState:UIControlStateNormal];

button.titleLabel.font= [UIFontsystemFontOfSize:14.0f];

[buttonsetTitleColor:[UIColorgrayColor]forState:UIControlStateNormal];

[buttonsetTitleColor:[UIColorhexStringToColor:@"808080"]forState:UIControlStateHighlighted];

[buttonsizeToFit];

[buttonsetFrame:CGRectMake(0,0, button.width+5,24)];

UIView*backBtnView = [[UIViewalloc]initWithFrame:button.bounds];

backBtnView.bounds=CGRectOffset(backBtnView.bounds,0,0);

[backBtnViewaddSubview:button];