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

2024-07-14 09:08:17   224人阅读

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 plaincopyprint?
  1. [self.navigationController  setToolbarHidden:NO animated:YES];  
    [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 plaincopyprint?
  1. UIBarButtonItem *one = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:nil action:nil];  
  2.     UIBarButtonItem *two = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemBookmarks target:nil action:nil];  
  3.     UIBarButtonItem *three = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:nil action:nil];  
  4.     UIBarButtonItem *four = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemEdit target:nil action:nil];  
  5.     UIBarButtonItem *flexItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];  
  6.     [self setToolbarItems:[NSArray arrayWithObjects:flexItem, one, flexItem, two, flexItem, three, flexItem, four, flexItem, nil]];  
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 plaincopyprint?
  1. #import <UIKit/UIKit.h>  
  2.   
  3. @interface SecondViewController : UIViewController  
  4. {  
  5.     UIToolbar *toolBar;  
  6. }  
  7. @end  
#import <UIKit/UIKit.h>@interface SecondViewController : UIViewController{    UIToolbar *toolBar;}@end

在SecondViewController.m添加

 

 

[cpp] view plaincopyprint?
  1. - (void)viewDidLoad  
  2. {  
  3.     [super viewDidLoad];  
  4.   
  5.     [self.navigationController  setToolbarHidden:YES animated:YES];  
  6.   
  7.     UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemSearch target:self action:@selector(gotoThridView:)];  
  8.     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)];  
  9.     [toolBar setBarStyle:UIBarStyleDefault];  
  10.     toolBar.autoresizingMask = UIViewAutoresizingFlexibleTopMargin;  
  11.     [toolBar setItems:[NSArray arrayWithObject:addButton]];  
  12.     [self.view addSubview:toolBar];  
  13.        
  14.     // Do any additional setup after loading the view from its nib.  
  15. }  
- (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 plaincopyprint?
  1. -(void)gotoThridView:(id)sender  
  2. {  
  3.     ThridViewController *thridView = [[ThridViewController alloc] init];  
  4.     [self.navigationController pushViewController:thridView animated:YES];  
  5.     thridView.title = @"Thrid View";  
  6.   
  7. }  
-(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UINavigationController详解与使用(一)添加UIBarButtonItem

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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