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navigation controller
一、程序框架
1、程序结构
2、storyboard
一个navigation controller 仅保留最基础部分，其他删除
根视图设置为view controller：
另外两个视图：
二、主要代码
1、ViewController.m中的主要代码
1）- (void)viewDidLoad方法
- (void)viewDidLoad { [super viewDidLoad]; //根视图导航栏左侧和右侧的两个按钮 UIBarButtonItem *leftButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action:@selector(selectLeftAction:)]; self.navigationItem.leftBarButtonItem = leftButton; UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(selectRightAction:)]; self.navigationItem.rightBarButtonItem = rightButton; //自定义从下一个视图左上角，“返回”根视图的按钮 UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:@"后退" style:UIBarButtonItemStyleDone target:nil action:nil]; self.navigationItem.backBarButtonItem=backButton; //自定义根视图下方的工具条，可进一步绑定各个按钮的处理函数；只对当前视图有效，切换到其他视图时为空白 [self.navigationController setToolbarHidden:NO animated:YES]; 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]]; }
2）导航条左侧按钮响应函数
-(void)selectLeftAction:(id)sender{ UIAlertView *alter = [[UIAlertView alloc] initWithTitle:@"提示" message:@"你点击了导航栏左按钮" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil]; [alter show];}
3）导航条右侧按钮响应函数
-(void)selectRightAction:(id)sender{ VCSecondView *vcSecondView; vcSecondView =[self.storyboard instantiateViewControllerWithIdentifier: @"second_view"]; [self.navigationController pushViewController:vcSecondView animated:YES];}
2、VCSecondView.m中的主要代码
1）- (void)viewDidLoad
- (void)viewDidLoad{ [super viewDidLoad]; //自定义在导航条显示的对第二个视图对描述； //UINavigationController的title可以用别的view替代，比如用UIButton UILable等，此处使用uibutton UIButton *button = [UIButton buttonWithType: UIButtonTypeRoundedRect]; [button setTitle: @"自定义title" forState: UIControlStateNormal]; [button sizeToFit]; self.navigationItem.titleView = button; //导航栏右侧按钮 UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(selectRightAction:)]; self.navigationItem.rightBarButtonItem = rightButton; //自定义从下一个视图左上角，“返回”本视图的按钮 UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:@"后退" style:UIBarButtonItemStyleDone target:nil action:nil]; self.navigationItem.backBarButtonItem=backButton;}
2）导航条右侧按钮响应函数
-(void)selectRightAction:(id)sender{ VCThirdView *vcThirdView; vcThirdView =[self.storyboard instantiateViewControllerWithIdentifier: @"third_view"]; [self.navigationController pushViewController:vcThirdView animated:YES];}
2、VCThirdView.m中的主要代码
均是默认代码
三、运行测试
1、初始界面
2、单击根视图左侧按钮
3、单击根视图右侧按钮
4、单击第二个视图右侧按钮
四、另外两个功能：不常用
在第二个视图中操作
1、分割功能：UISegmentedControl
1）- (void)viewDidLoad添加如下代码：
- (void)viewDidLoad{ 。。。 NSArray *array = [NSArray arrayWithObjects:@"分割a",@"分割b", nil]; UISegmentedControl *segmentedController = [[UISegmentedControl alloc] initWithItems:array]; segmentedController.segmentedControlStyle = UISegmentedControlSegmentCenter; [segmentedController addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChanged]; self.navigationItem.titleView = segmentedController; 。。。 }
2）分割按钮响应函数：
-(void)segmentAction:(id)sender{ switch ([sender selectedSegmentIndex]) { case 0: { UIAlertView *alter = [[UIAlertView alloc] initWithTitle:@"提示" message:@"你点击了分割a" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil]; [alter show]; } break; case 1: { UIAlertView *alter = [[UIAlertView alloc] initWithTitle:@"提示" message:@"你点击了分割b" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil]; [alter show]; } break; default: break; }}
3）运行结果：
2、动态加载自定义的toolbar
1）VCSecondView.h
#import <UIKit/UIKit.h>@interface VCSecondView : UIViewController{ UIToolbar *toolBar;}@end
2）- (void)viewDidLoad中添加如下代码：
UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemSearch target:self action:nil/*@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];
3）运行结果：切换到第三个视图过程中右上角有黑色阴影
五、其他
导航栏按钮图标类型：
参考：http://blog.csdn.net/totogo2010/article/details/7681879
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