UINavigationController 相關知識總結
在"NavigationAppDelegate.m"文件中：包含"FirstViewController.h"頭文件
在-(BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions
{
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
FirstViewController* firstViewController = [[[FirstViewController alloc] initWithNibName:@"FirstViewController" bundle:nil] autorelease];
self.navigationController = [[[UINavigationController alloc] initWithRootViewController:firstViewController] autorelease];
self.window.rootViewController = self.navigationController;
[self.window makeKeyAndVisible];
return YES;
}
運行程序，會發現有一個導航欄
然後在"FirstViewController.m"文件中，包含"SecondViewController.h"頭文件
-(void)viewDidLoad
{
[super viewDidLoad];
//採用自定義按鈕的方法，給導航欄定義一個右側按鈕
UIButton* button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
button.frame = CGRectMake(0,0,60,40);
[button setTitle:@"exchange" forState:UIControlStateNormal];
[button addTarget:self action:@selector(exchange:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem* right = [[[UIBarButtonItem alloc] initWithCustomView:button] autorelease];
self.navigationItem.rightBarButtonItem = right;
//採用系統方法，給導航欄增加一個左側按鈕
UIBarButtonItem* left = [[[UIBarButtonItem alloc] initWithTitle:@"left" style:UIBarButtonItemStyleDone target:@selector(left:)] autorelease];
self.navigationItem.leftBarButtonItem = left;
//給當前視圖的導航欄設置標題
self.navigationItem.title = @"一級視圖";
}
-(void)exchange:(id)sender //單擊定義導航欄右側的按鈕，進入到下一個視圖。
{
SecondViewController* secondViewController = [[[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil] autorelease];
[self.navigationController pushViewController:secondViewController animated:YES];
}
然後在"SecondViewController.m"文件中，包含"ThirdViewController.h"頭文件
- (void)viewDidLoad
{
[super viewDidLoad];
//定義一個右側按鈕
UIBarButtonItem* rightButton = [[[UIBarButtonItem alloc] initWithTitle:@"next" style:UIBarButtonItemStyleDone target:@selector(next:)] autorelease];
self.navigationItem.rightBarButtonItem = rightButton;
}
- (void)next:(id)sender //單擊定義二級視圖右側的按鈕，進入到三級視圖。
{
ThirdViewController* thirdViewController = [[[ThirdViewController alloc] initWithNibName:@"ThirdViewController" bundle:nil] autorelease];
[self.navigationController pushViewController:thirdViewController animated:YES];
}
然後在文件"ThirdViewController.h"中，使用xib定義四個按鈕，分別對應下面四個方法
- (void)push:(id)sender //單擊此按鈕，進入到下一個視圖
{
ThirdViewController* thirdViewController = [[[ThirdViewController alloc] initWithNibName:@"ThirdViewController" bundle:nil] autorelease];
[self.navigationController pushViewController:thirdViewController animated:YES];
}
- (void)pop:(id)sender //單擊此按鈕，返回到上一個視圖
{
[self.navigationController popViewControllerAnimated:YES];
}
- (void)popToRoot:(id)sender //單擊此按鈕，返回到根視圖界面
{
[self.navigationController popToRootViewControllerAnimated:YES];
}
- (void)popToIndex:(id)sender //返回到指定位置的視圖
{
[self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:1] animated:YES]; //返回到第一個視圖界面
}