IOS之【UINavigationController的使用】

文件
 
#import "OneAppDelegate.h"
#import "OneViewController.h"
@implementation
 
导航控制器的代理方法
- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated {
NSLog(@"已经显示：%@", viewController);
}
 
- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated {
NSLog(@"即将显示：%@", viewController);
}
 
- (void)dealloc
{
_windowrelease];
superdealloc];
}
 
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary
{
    self.window = [[[UIWindowalloc] initWithFrame:[[UIScreenmainScreen] bounds]]autorelease];
    // Override point for customization after application launch.
    //初始化一个根控制器
    OneViewController *root = [[[OneViewControlleralloc] init]  autorelease];
     
    UINavigationController *vc = [[[UINavigationControlleralloc] initWithRootViewController:root]autorelease];
     
delegate =self;
     
    self.window.rootViewController = vc;
     
    [self.windowmakeKeyAndVisible];
    return  YES;
}
 
 
OneViewController.h文件
 
#import <UIKit/UIKit.h>
@protocol SecondViewControllerDelegate;
 
@interface OneViewController :UIViewController <SecondViewControllerDelegate>
- (void)setString:(NSString
 @end
 
 
 
OneViewController.m文件
 
#import "OneViewController.h"
#import "SecondViewController.h"
@interface  OneViewController ()
 
 @end
 
@implementation
 
的方法
- (void)setSecondData:(NSString
    NSLog(@"从Second传过来的数据：%@", str);
}
 
其他方法
- (void)setString:(NSString
    NSLog(@"从Second传过来的数据：%@", str);
}
 
- (void)left {
    NSLog(@"点击了左边");
}
 
- (void)right {
    SecondViewController *second = [[SecondViewControlleralloc] init];
title =@"第2个控制器";
     
delegate =self;
     
    //传递数据给下一个控制器
setString:@“。。。。。。。”];
     
    //  将second放入栈中
    // self.navigationController可以拿到子控制器所在的导航控制器
    [self.navigationControllerpushViewController:second animated:YES];
     
release];
}
 
- (void)viewDidLoad
{
    [superviewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.title =@"红色控制器";
    //self.navigationItem.title = @"红色控制器";
     
    //  设置左边的item
    self.navigationItem.leftBarButtonItem = [[[UIBarButtonItemalloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAddtarget:selfaction:@selector(left)]autorelease];
     
    //  设置右边的item
    UIButton *btn = [UIButtonbuttonWithType:UIButtonTypeContactAdd];
    [btn addTarget:selfaction:@selector(right)forControlEvents:UIControlEventTouchUpInside];
     
    self.navigationItem.rightBarButtonItem = [[[UIBarButtonItemalloc] initWithCustomView:btn]autorelease];
     
    self.view.backgroundColor = [UIColorredColor];
     
    //设置返回键的文字为"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 <UIKit/UIKit.h>
@protocol SecondViewControllerDelegate;
 
 //@class OneViewController;
@interface SecondViewController :UIViewController
 
 //@property (nonatomic, retain) OneViewController *One;
 
- (void)setString:(NSString
 
- (IBAction)click:(id)sender;
 
@property (nonatomic,retain) id<SecondViewControllerDelegate> delegate;
 @end
 
@protocol SecondViewControllerDelegate <NSObject>
- (void)setSecondData:(NSString
 @end
 
 
文件
 
 
#import "SecondViewController.h"
 //#import "OneViewController.h"
 
@interface  SecondViewController ()
 
 @end
 
@implementation
 
 
- (void)viewDidLoad
{
    [superviewDidLoad];
     
}
 
- (void)viewDidUnload {
    [superviewDidUnload];
self.delegate =nil;
    //self.One = nil;
}
 
- (void)dealloc {
    [_delegate  release];
    //[_One release];
superdealloc];
}
 
公共方法
- (void)setString:(NSString
    NSLog(@"从One传过来的数据：%@", string);
}
 
- (void)click:(id)sender {
    //一口气跳回根控制器（会把中间的控制器都移到栈外）
    // [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"];
    }
     
    //移除栈顶的控制器
    [self.navigationControllerpopViewControllerAnimated:YES];
}
 @end