iOS 开发 righBarButtonItems

 // 添加

 UIButton *add = [UIButton buttonWithType:UIButtonTypeCustom];

 add.backgroundColor = [UIColor purpleColor];

 add.frame = CGRectMake(0, 0, 30, 30);

 [add addTarget:self action:@selector(homeViewAddAction) forControlEvents:UIControlEventTouchUpInside];

    

 UIBarButtonItem *addItem = [[UIBarButtonItem alloc] initWithCustomView:add];

    

 // 搜索

 UIButton *search = [UIButton buttonWithType:UIButtonTypeCustom];

 search.backgroundColor = [UIColor purpleColor];

 search.frame = CGRectMake(0, 0, 30, 30);

 [search addTarget:self action:@selector(homeViewSearchAction) forControlEvents:UIControlEventTouchUpInside];

    

 UIBarButtonItem *searchItem = [[UIBarButtonItem alloc] initWithCustomView:search];

 /**

  *  数组的添加顺序是从右向左的 (意思是 加入顺序是相反的)

  */

 NSArray *buttons = @[searchItem, addItem];

 self.navigationItem.rightBarButtonItems = buttons;