NavigationItem 点击范围更改

NavigationItem的点击范围很大，有时候会影响到附近区域点击事件，所以需要缩小点击范围，可采用如下方式定义点击范围

文／5ad3532817df（简书作者）
原文链接：http://www.jianshu.com/p/9c0dc91a3cf5
著作权归作者所有，转载请联系作者获得授权，并标注“简书作者”。

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];