如何在UINavigationBar上設置自定義按鈕？

Question

我有一個觀點隨着UINavigationBar的

導航欄只允許我在固定位置

與導航欄的兩側固定位置的按鈕..

我想自定義按鈕的位置... 任何主意......會幫我 由於提前

Answer 1

您不能自上UINavigationItem按鈕的位置，你只能設置rightBarButtonItem和leftBarButtonItem。

如果您真的需要這個，請考慮使用工具欄。

如果您需要後退按鈕，就像導航欄的後退按鈕一樣，請創建一個自定義按鈕並使用圖像。

這是PSD，這將有所幫助。

Answer 2

您可以在UINavigationItem中放置自定義按鈕。這是我如何在右側添加三個按鈕：

// create a toolbar to have three buttons in the right (thanks Mart!) 
tools = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 157, 44.01)]; 

UIImageView *imgView = [[UIImageView alloc] initWithFrame:CGRectMake(0.0, 1.0, 157.0, 44.1)]; 
[imgView setImage:[UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"NavigationBarBackground" ofType:@"png"]]]; 
[tools addSubview:imgView]; 
[tools sendSubviewToBack:imgView]; 
[tools setTintColor:[UIColor colorWithRed:127/255.0 green:184/255.0 blue:72/255.0 alpha:1.0]]; 
[imgView release]; 

// create the array to hold the buttons, which then gets added to the toolbar 
NSMutableArray* buttons = [[NSMutableArray alloc] initWithCapacity:3]; 

UIBarButtonItem* bi = [[UIBarButtonItem alloc] 
         initWithTitle:@"Filter" style:UIBarButtonItemStyleBordered target:self action:@selector(showFilter:)]; 

[buttons addObject:bi]; 
[bi release]; 

bi = [[UIBarButtonItem alloc] 
     initWithImage:[UIImage imageNamed:@"Map.png"] style:UIBarButtonItemStyleBordered target:self action:@selector(showMap:)]; 

[buttons addObject:bi]; 
[bi release]; 

bi = [[UIBarButtonItem alloc] 
     initWithImage:[UIImage imageNamed:@"Favourite.png"] style:UIBarButtonItemStyleBordered target:self action:@selector(saveSearch:)]; 
[buttons addObject:bi]; 
[bi release]; 

[tools setItems:buttons animated:NO]; 

[buttons release]; 

rightBarButton = nil; 
rightBarButton = [[UIBarButtonItem alloc] initWithCustomView:tools]; 

self.navigationItem.rightBarButtonItem = rightBarButton;