UI 07 _ 导航视图控制器与属性传值

首先, 先创建三个VC.
完毕点击按钮, 进入下一页, 并可以返回.

要先把导航视图控制器创建出来.
在AppDelegate.m 文件里代码例如以下:

#import "AppDelegate.h"
#import "MainViewController.h"
@interface AppDelegate ()
@end@implementation AppDelegate
- (void)dealloc{[_window release];[super dealloc];
}
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];// Override point for customization after application launch.self.window.backgroundColor = [UIColor whiteColor];[self.window makeKeyAndVisible];[_window release];//先创建一个ViewControllerMainViewController *mainVC = [[MainViewController alloc] init];//创建导航视图控制器UINavigationController *navC = [[UINavigationController alloc] initWithRootViewController:mainVC];self.window.rootViewController = navC;//释放[mainVC release];[navC release];return YES;
}

对于导航视图控制器的一些设置.

  //导航视图控制器的高度是44,上面的状态栏高度是20,加在一起默认是64;// 加上一个标题.self.title = @"猫眼电影";// 对外观进行设置,不是全部的颜色都是BackgroundColor;self.navigationController.navigationBar.barTintColor = [UIColor redColor];

  // 创建一个UIViewUIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];view.backgroundColor = [UIColor orangeColor];[self.view addSubview:view];[view release];// 为了防止坐标系被篡改,我们把bar从半透明改为全透明.这样坐标系的原点会自己主动向下推64self.navigationController.navigationBar.translucent = NO;

内容方面的设置

//另外一种标题的设置self.navigationItem.title = @"骨头 商店";// 指定一些视图,作为titleViewUISegmentedControl *seg = [[UISegmentedControl alloc] initWithItems:@[@"信息",@"通话"]];self.navigationItem.titleView = seg;[seg release];

创建左右两个按钮

    //左按钮self.navigationItem.leftBarButtonItem = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem: UIBarButtonSystemItemOrganize target:self action:@selector(leftAction:)] autorelease];//右按钮//如此创建,原本拖拽的图标的颜色是黄色,但这么创建后,图标是蓝色的.self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"狗.png"] style:UIBarButtonItemStylePlain target:self action:@selector(rightAction:)] autorelease];// 以下方法图标将会显示黄色.// 创建一个小button,把图片装上.UIButton *Littlebutton = [UIButton buttonWithType:UIButtonTypeCustom];Littlebutton.frame = CGRectMake(0, 0, 40, 40);[Littlebutton setImage:[UIImage imageNamed:@"狗.png"] forState:UIControlStateNormal];self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:Littlebutton];UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];button.frame = CGRectMake(260, 530, 80, 40);button.backgroundColor = [UIColor yellowColor];[self.view addSubview:button];[button addTarget:self action:@selector(click:) forControlEvents:UIControlEventTouchUpInside];button.layer.cornerRadius = 10;[button setTitle:@"下一页" forState:UIControlStateNormal];

对应的, 左右两个按钮的点击事件也要实现

- (void)rightAction:(UIBarButtonItem *)button{
}- (void)leftAction:(UIBarButtonItem *)barButton{   
}

点击Button跳转到下一页.
用模态也可以跳转 , 可是跳转的页面不再有导航视图.
实现Button的点击事件
当中我要完毕从前向后传值.

- (void)click:(UIButton *)button{
-    // 用导航视图控制器跳转.//1.先创建下一页对象.SecondViewController *secondVC = [[SecondViewController alloc] init];//通过导航控制器找到[self.navigationController pushViewController:secondVC animated:YES];[secondVC release];// 属性传值第二步secondVC.number = 100;secondVC.string = self.textField.text;secondVC.arr = @[@"haha",@"啦啦"];   
}

第二个页面的 .h 中代码:

#import <UIKit/UIKit.h>@interface SecondViewController : UIViewController
// 属性传值第一步,在第二个页面写一条属性.
@property(nonatomic, assign)NSInteger number;//属性传值另外一种: 针对TextField中的字符串写一条属性.
@property(nonatomic, copy)NSString *string;//属性传值第三种: 传一个数组
@property(nonatomic, retain)NSArray *arr;@end

第二个页面的 .m 中代码:

#import "SecondViewController.h"
#import "ThirdViewController.h"
@interface SecondViewController ()
@property(nonatomic, retain)UILabel *label;
@end@implementation SecondViewController
- (void)dealloc{[_label release];[_string release];[_arr release];[super dealloc];
}- (void)viewDidLoad {[super viewDidLoad];// Do any additional setup after loading the view.self.view.backgroundColor = [UIColor yellowColor];self.navigationController.navigationBar.barTintColor = [UIColor magentaColor];UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];button.frame = CGRectMake(260, 530, 80, 40);button.backgroundColor = [UIColor blueColor];[self.view addSubview:button];[button addTarget:self action:@selector(click:) forControlEvents:UIControlEventTouchUpInside];button.layer.cornerRadius = 10;[button setTitle:@"下一页" forState:UIControlStateNormal];//第三步://第一种:NSLog(@"%ld",self.number);//另外一种:self.label = [[UILabel alloc] initWithFrame:CGRectMake(100, 100, 200, 50)];[self.view addSubview:self.label];[_label release];self.label.layer.borderWidth = 1;//属性传值第三步:里面的值赋给labelself.label.text = self.string;// 第三种:NSLog(@"%@",self.arr[1]);  
}
- (void)click:(UIButton *)button{ThirdViewController *thirdVC = [[ThirdViewController alloc] init];[self.navigationController pushViewController:thirdVC animated:YES];[thirdVC release]; 
}