Question

如何将navigation controller 和 toolbar 一起使用，有例子吗

Answer 1

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。

[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

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

#import <UIKit/UIKit.h>

@interface SecondViewController : UIViewController
{
UIToolbar *toolBar;
}
@end

在SecondViewController.m添加

- (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]];