iOS开发之--如何修改TabBarItem的title的字体和颜色/BarButtonItem的title的字体大小和颜色/添加背景图片，并添加点击方法

在进行项目的过程中，我们往往会遇到各种各样的自定义颜色和字体，下面提供一种修改系统自带的TabBarItem的字体和颜色的方法，希望能帮到大家：

[[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
                                                       [UIColor whiteColor], UITextAttributeTextColor,
                                                       nil] forState:UIControlStateNormal];
   UIColor *titleHighlightedColor = [UIColor greenColor];
   [[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
                                                       titleHighlightedColor, UITextAttributeTextColor,
                                                       nil] forState:UIControlStateSelected];

上面是正常的，下面是选中的！

BarButtonItem的title的字体大小和颜色：

[button1 setTitleTextAttributes:@{NSFontAttributeName:[UIFont systemFontOfSize:14],NSForegroundColorAttributeName:[UIColor blueColor]} forState:UIControlStateNormal];
    [button1 setTitle:@"排单币转账记录"];
    [button1 setTitleTextAttributes:@{NSFontAttributeName:[UIFont systemFontOfSize:]} forState:UIControlStateNormal];
    self.navigationItem.rightBarButtonItem = button1;

这样也可以修改大小！

UIBarButtonItem的添加返回背景图片和点击方法：

UIBarButtonItem *button = [[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:@"backBarButton"] style:(UIBarButtonItemStyleDone) target:self action:@selector(backAction)];
    self.navigationItem.leftBarButtonItem = button;

以上只是修改系统的，可能有些方法我们遇不到用的机会！如果是自定义的话，就不用这么麻烦了！