iOS学习之UINavigationController详解与使用(三)ToolBar

iOS学习之UINavigationController详解与使用(二)页面切换和segmentedController 接上篇，我们接着讲Navigation
的Toolbar。

1、显示Toolbar

在RootViewController.m的- (void)viewDidLoad方法中添加代码，这样Toobar就显示出来了。

[cpp] view
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[self.navigationController setToolbarHidden:NO animated:YES];



2、在ToolBar上添加UIBarButtonItem

新建几个UIBarButtonItem，然后以数组的形式添加到Toolbar中

[cpp] view
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UIBarButtonItem *one = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:nil action:nil];

UIBarButtonItem *two = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemBookmarks target:nil action:nil];

UIBarButtonItem *three = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:nil action:nil];

UIBarButtonItem *four = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemEdit target:nil action:nil];

UIBarButtonItem *flexItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];

[self setToolbarItems:[NSArray arrayWithObjects:flexItem, one, flexItem, two, flexItem, three, flexItem, four, flexItem, nil]];

效果：



注意：用 [self.navigationController.toolbar setItems:(NSArray *) animated:<#(BOOL)#>]这个方法添加item是不起效果的。下面我动态自己添加Toolbar时，这个才起效果。

3、动态添加Toolbar

我们在SecondView添加动态的Toolbar。

在SecondViewController.h添加

[cpp] view
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#import <UIKit/UIKit.h>

@interface SecondViewController : UIViewController

{

UIToolbar *toolBar;

}

@end

在SecondViewController.m添加

[cpp] view
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- (void)viewDidLoad

{

[super viewDidLoad];

[self.navigationController setToolbarHidden:YES animated:YES];

UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemSearch target:self action:@selector(gotoThridView:)];

toolBar = [[UIToolbar alloc] initWithFrame:CGRectMake(0.0, self.view.frame.size.height - toolBar.frame.size.height - 44.0, self.view.frame.size.width, 44.0)];

[toolBar setBarStyle:UIBarStyleDefault];

toolBar.autoresizingMask = UIViewAutoresizingFlexibleTopMargin;

[toolBar setItems:[NSArray arrayWithObject:addButton]];

[self.view addSubview:toolBar];

// Do any additional setup after loading the view from its nib.

}

先把RootView时显示的Toobar隐藏

[self.navigationController setToolbarHidden:YESanimated:YES];然后把新建的Toolbar添加的SecondView中，并为Toobar设置了一个Item.

[toolBarsetItems:[NSArrayarrayWithObject:addButton]];

BarButtonItem用 的是UIBarButtonSystemItemSearch, 效果如下：



4、新建ThridView，从SecondView跳转到

Commad+N新建一个ThridViewController，

这个addButton跳转到ThridView

[cpp] view
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-(void)gotoThridView:(id)sender

{

ThridViewController *thridView = [[ThridViewController alloc] init];

[self.navigationController pushViewController:thridView animated:YES];

thridView.title = @"Thrid View";

}

跳转Second到Third效果：



到此UINavigationController练习的差不多了。

前面两篇：

iOS学习之[b]UINavigationController[/b]详解与使用(一)添加[b]UIBarButtonItem[/b]

iOS学习之UINavigationController详解与使用(二)页面切换和segmentedController

例子代码：https://github.com/schelling/YcDemo

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在View中添加一个UIToolBar，其中代码如下：

//定义UIToolBar m_pToolBar= [[UIToolbaralloc]initWithFrame:CGRectMake(0.0,self.view.frame.size.height-m_pActionButton.frame.size.height- 44.0,self.view.frame.size.width,44.0)]; [m_pToolBar setBarStyle:UIBarStyleBlackOpaque]; m_pToolBar.autoresizingMask=UIViewAutoresizingFlexibleTopMargin; //向uitoolbar添加控件 m_pTextField=[[UITextFieldalloc]initWithFrame:CGRectMake(12.0,7.0,264.0,31.0)]; m_pTextField.delegate= self; [m_pTextField setBorderStyle:UITextBorderStyleRoundedRect]; [m_pTextField setFont:[UIFont fontWithName:@"Helvetica" size:16.0]]; m_pButtonAdd= [UIButton buttonWithType:UIButtonTypeCustom]; [m_pButtonAdd setFrame:CGRectMake(286.0,8.0,29.0,29.0)]; [m_pButtonAdd addTarget:selfaction:@selector(addOpinion)forControlEvents:UIControlEventTouchUpInside]; [m_pButtonAdd setImage:[UIImage imageNamed:@"button_plus"]forState:UIControlStateNormal]; UIBarButtonItem *mBarButtonItemTextField =[[UIBarButtonItemalloc]initWithCustomView:m_pTextField]; UIBarButtonItem *mBarButtonItemButtonAdd =[[UIBarButtonItemalloc]initWithCustomView:m_pButtonAdd]; [m_pToolBarsetItems:[NSArrayarrayWithObjects:mBarButtonItemTextField,mBarButtonItemButtonAdd,nil]]; [mBarButtonItemTextFieldrelease]; [mBarButtonItemButtonAddrelease];