点击navigationitem上的按钮，弹出view，类似弹出菜单

推荐示例点击打开链接，下载需要引入的MLKMenuPopover.h/m文件



示例图片如下：

1.引入MLKMenuPopover.h/m文件，MLKMenuPopover.h在上述连接中，自己下载。

2.实现MLKMenuPopoverDelegate协议

3.定义@property(nonatomic,strong) MLKMenuPopover *menuPopover;

        @property(nonatomic,strong) NSArray *menuItems;

4.在viewDidLoad中写：

 self.menuItems = [NSArray arrayWithObjects:@"第一条", @"第二条",@"第三条", nil];

    UIBarButtonItem *right=[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(BarShow)];

    UIBarButtonItem *right1=[[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed: @"group_member_type.png"]  style:UIBarButtonItemStylePlain target:self action:@selector(BarShow)];

    [self.navigationItem setRightBarButtonItem:right1];

5.实现navigationItem 的BarShow方法

  self.menuPopover = [[MLKMenuPopover alloc] initWithFrame:CGRectMake(160, 70, 140, 140) menuItems:self.menuItems];

    self.menuPopover.menuPopoverDelegate = self;

    [self.menuPopover showInView:self.view];

6.实现协议的方法  这里实现自己想干的事情

- (void)menuPopover:(MLKMenuPopover *)menuPopover didSelectMenuItemAtIndex:(NSInteger)selectedIndex

{

    [self.menuPopover dismissMenuPopover];

    

    NSString *title = [NSString stringWithFormat:@"%@ selected.",[self.menuItems objectAtIndex:selectedIndex]];

    

    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:title message:nil delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];

    

    [alertView show];

}

ok，大功告成