在同一側有多個按鈕的iPad應用導航欄

Question

如何在導航欄左側有一個後退按鈕和另一個按鈕？因爲這是一個iPad應用程序，有多個按鈕的空間。但我只能得到它顯示每對navigationitem側一個鍵...

Answer 1

找到了答案：http://blog.blackwhale.at/2009/06/uibuttons-in-uinavigationbar/

Answer 2

對於誰在這裏絆倒和斷開的鏈接感到失望的人，看看這篇文章：

http://osmorphis.blogspot.com/2009/05/multiple-buttons-on-navigation-bar.html

Answer 3

iOS現在支持同一側的多個按鈕。從UINavigationItem文檔：

自定義視圖

titleView property 
    leftBarButtonItems property 
    leftBarButtonItem property 
    rightBarButtonItems property 
    rightBarButtonItem property 
– setLeftBarButtonItems:animated: 
– setLeftBarButtonItem:animated: 
– setRightBarButtonItems:animated: 
– setRightBarButtonItem:animated: 

所以，基本上，你會寫這樣的事情在左邊添加兩個按鈕：

UIBarButtonItem *refreshBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh target:self action:@selector(refreshPlans:)]; 
UIBarButtonItem *selectYearBtn = [[UIBarButtonItem alloc] initWithTitle:@"Select Year" style:UIBarButtonSystemItemAction target:self action:@selector(selectYear)]; 
self.navigationItem.leftBarButtonItems = [[NSArray alloc] initWithObjects: refreshBtn, selectYearBtn, nil]; 

不幸的是，我的天堂」沒有看到在故事板中執行此操作的方法。希望這可以幫助。

Answer 4

UIBarButtonItem *btn0 = [[UIBarButtonItem alloc] initWithTitle:@"1" style:UIBarButtonItemStylePlain target:self action:@selector(tapLevel0)]; 

    UIBarButtonItem *btn1 =[[UIBarButtonItem alloc] initWithTitle:@"<2" style:UIBarButtonItemStylePlain target:self action:@selector(tapLevel1:)]; 

    UIBarButtonItem *btn2 = [[UIBarButtonItem alloc] initWithTitle:@"<3" style:UIBarButtonItemStylePlain target:self action:@selector(tapLevel2:)]; 

    UIBarButtonItem *space = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil]; 
    space.width = 10; 

    UIBarButtonItem *space2 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil]; 
    space2.width = 10; 

    // UIBarButtonItem *refreshButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh target:self action:@selector(refreshItem)]; 
    self.navigationItem.leftBarButtonItems = [NSArray arrayWithObjects:btn0, space, btn1, space2, btn2, nil];