iOS学习之UINavigationController详解与使用(三)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 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. @interface SecondViewController : UIViewController
3. {
4. UIToolbar *toolBar;
5. }
6. @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. [self.navigationController  setToolbarHidden:YES animated:YES];
5. UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemSearch target:self action:@selector(gotoThridView:)];
6. 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)];
7. [toolBar setBarStyle:UIBarStyleDefault];
8. toolBar.autoresizingMask = UIViewAutoresizingFlexibleTopMargin;
9. [toolBar setItems:[NSArray arrayWithObject:addButton]];
10. [self.view addSubview:toolBar];
11. // Do any additional setup after loading the view from its nib.
12. }

- (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. }

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