OneAppDelegate.m文件

 

#import "OneAppDelegate.h"

#import "OneViewController.h"

@implementation OneAppDelegate

 

#pragma mark 導航控制器的代理方法

- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated {

NSLog(@"已經顯示：%@", viewController);

}

 

- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated {

NSLog(@"即將顯示：%@", viewController);

}

 

- (void)dealloc

{

[_windowrelease];

[superdealloc];

}

 

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

{

self.window = [[[UIWindowalloc] initWithFrame:[[UIScreenmainScreen] bounds]]autorelease];

// Override point for customization after application launch.

//初始化一個根控制器

OneViewController *root = [[[OneViewControlleralloc] init] autorelease];

 

UINavigationController *vc = [[[UINavigationControlleralloc] initWithRootViewController:root]autorelease];

 

vc.delegate =self;

 

self.window.rootViewController = vc;

 

[self.windowmakeKeyAndVisible];

return YES;

}

 

 

OneViewController.h文件

 

#import

@protocol SecondViewControllerDelegate;

 

@interface OneViewController :UIViewController

- (void)setString:(NSString *)str;

@end

 

 

 

OneViewController.m文件

 

#import "OneViewController.h"

#import "SecondViewController.h"

@interface OneViewController ()

 

@end

 

@implementation OneViewController

 

#pragma mark - SecondViewControllerDelegate的方法

- (void)setSecondData:(NSString *)str {

NSLog(@"從Second傳過來的數據：%@", str);

}

 

#pragma mark - 其他方法

- (void)setString:(NSString *)str {

NSLog(@"從Second傳過來的數據：%@", str);

}

 

- (void)left {

NSLog(@"點擊了左邊");

}

 

- (void)right {

SecondViewController *second = [[SecondViewControlleralloc] init];

second.title =@"第2個控制器";

 

second.delegate =self;

 

//傳遞數據給下一個控制器

[secondsetString:@“。。。。。。。”];

 

// 將second放入棧中

// self.navigationController可以拿到子控制器所在的導航控制器

[self.navigationControllerpushViewController:second animated:YES];

 

[secondrelease];

}

 

- (void)viewDidLoad

{

[superviewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

self.title =@"紅色控制器";

//self.navigationItem.title = @"紅色控制器";

 

// 設置左邊的item

self.navigationItem.leftBarButtonItem = [[[UIBarButtonItemalloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAddtarget:selfaction:@selector(left)]autorelease];

 

// 設置右邊的item

UIButton *btn = [UIButtonbuttonWithType:UIButtonTypeContactAdd];

[btn addTarget:selfaction:@selector(right)forControlEvents:UIControlEventTouchUpInside];

 

self.navigationItem.rightBarButtonItem = [[[UIBarButtonItemalloc] initWithCustomView:btn]autorelease];

 

self.view.backgroundColor = [UIColorredColor];

 

//設置返回鍵的文字為"返回"

self.navigationItem.backBarButtonItem = [[[UIBarButtonItemalloc] initWithTitle:@"返回"style:UIBarButtonItemStylePlaintarget:nilaction:nil]autorelease];

}

 

- (void)didReceiveMemoryWarning

{

[superdidReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

 

@end

 

 

 

SecondViewController.h文件

 

#import

@protocol SecondViewControllerDelegate;

 

//@class OneViewController;

@interface SecondViewController :UIViewController

 

//@property (nonatomic, retain) OneViewController *One;

 

- (void)setString:(NSString *)string;

 

- (IBAction)click:(id)sender;

 

@property (nonatomic,retain) id delegate;

@end

 

@protocol SecondViewControllerDelegate

- (void)setSecondData:(NSString *)str;

@end

 

 

SecondViewController.m文件

 

 

#import "SecondViewController.h"

//#import "OneViewController.h"

 

@interface SecondViewController ()

 

@end

 

@implementation SecondViewController

 

 

- (void)viewDidLoad

{

[superviewDidLoad];

 

}

 

- (void)viewDidUnload {

[superviewDidUnload];

self.delegate =nil;

//self.One = nil;

}

 

- (void)dealloc {

[_delegate release];

//[_One release];

[superdealloc];

}

 

#pragma mark - 公共方法

- (void)setString:(NSString *)string {

NSLog(@"從One傳過來的數據：%@", string);

}

 

- (void)click:(id)sender {

//一口氣跳回根控制器（會把中間的控制器都移到棧外）

// [self.navigationController popToRootViewControllerAnimated:YES];

 

//跳回到指定的控制器

// [self.navigationController popToViewController:<#(UIViewController *)#> animated:<#(BOOL)#>];

 

//[self.One setString:@"12345"];

 

if ([self.delegaterespondsToSelector:@selector(setSecondData:)]) {

[self.delegatesetSecondData:@"12345"];

}

 

//移除棧頂的控制器

[self.navigationControllerpopViewControllerAnimated:YES];

}

@end