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

2022-10-16 13:18:11

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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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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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.
}