iOS:UI系列之UINavigationController

　　又到了总结的时间了,突然间感觉时间过得好快啊, 总觉的时间不够用,但是这也没办法啊, 只有自己挤时间了,虽然是零基础,但是这并不能代表什么啦,只要努力,收获总还是有的, 同时我也相信广大的博友肯定也有同样的感触吧!

　　接下来就让我来为大家解读我们今天所学习的内容吧,嘿嘿. 首先在上课刚开始时间,我们做了短短的练习, 对以往的知识有了进一步的了解, 也提高了熟练度, 但是时间总是很快的, 马上我们就迎来了我们今天学习的新内容UINavigationControl!

　　首先让我来介绍下UINavigationControl的创建方法吧:

　　1.创建导航控制器, 并指定导航控制器的RootViewController

　　2.设置导航控制器为rootViewController

具体创建过程我就用代码来告诉大家吧,如下:

FirstViewController *firstVC = [[FirstViewController alloc] init];
    NSLog(@"第一个页面初始化完成");
    UINavigationController *navC = [[UINavigationController alloc] initWithRootViewController:firstVC];
    [firstVC release];
    NSLog(@"设置第一个页面为导航控制器的rootViewController");
    //步骤2.设置导航控制器为window的rootViewController
    self.window.rootViewController = navC;

    NSLog(@"设置导航控制器为window的RootViewController");
    [navC release];

UINavigationControl,当行控制器, 继承于UIViewController, 视图控制器的视图控制器, 用于管理伊利咧视图控制器,被管理的视图控制器以栈(先进后出, 后进先出)的形式储存

每一个导航控制器都自带一个navigationBar(导航条), UINavigationBar继承于UIView, navigationBar是用于管理导航条的展现(iOS7之前是不透明的,之后就变为透明的啦)

同时我们也可以对导航条以及上面的东西进行设置, 具体方法如下:

//设置导航条是否半透明, 设置背景色,半透明失效
    naviVC.navigationBar.translucent = YES;
    //设置导航条上item的颜色
    naviVC.navigationBar.tintColor = [UIColor purpleColor];

    //设置导航条样式
    naviVC.navigationBar.barStyle = UIBarStyleBlack;

在之后我们便进入了本节课最为重要的了 那就是传值问题, 在今天我们学习的方法中由属性传值和单例传值.

单例传值的创建方法为:

1.类方法

2.返回值类型是当前类

3.方法名:default + 类名

下面为大家带上今天的例子:

下面图示为1 2 3步

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor purpleColor];
    // Do any additional setup after loading the view.
    self.navigationItem.title = @"主页";
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(20, 100, 60, 30)];
    label.text = @"用户名";
    label.textAlignment = NSTextAlignmentRight;
    [self.view addSubview:label];
    [label release];

    UILabel *label1 = [[UILabel alloc] initWithFrame:CGRectMake(20, 150, 60, 30)];
    label1.text = @"性别";
    label1.textAlignment = NSTextAlignmentRight;
    [self.view addSubview:label1];
    [label1 release];

    field = [[UITextField alloc] initWithFrame:CGRectMake(100, 100, 200, 30)];
    field.borderStyle = UITextBorderStyleRoundedRect;
    field.placeholder = @"请输入用户名";
    field.autocorrectionType = UITextAutocorrectionTypeNo;
    field.spellCheckingType = UITextSpellCheckingTypeNo;
    [self.view addSubview:field];
    [field release];

    field1 = [[UITextField alloc] initWithFrame:CGRectMake(100, 150, 200, 30)];
    field1.borderStyle = UITextBorderStyleRoundedRect;
    field1.placeholder = @"请输入性别";
    [self.view addSubview:field1];
    [field1 release];

    UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
    button.frame = CGRectMake(70, 200, 70, 30);
    [button addTarget:self action:@selector(changPage:) forControlEvents:UIControlEventTouchUpInside];
    [button setTitle:@"登陆" forState:UIControlStateNormal];
    [self.view addSubview:button];

    UIButton *button1 = [UIButton buttonWithType:UIButtonTypeSystem];
    button1.frame = CGRectMake(180, 200, 70, 30);
    [button1 addTarget:self action:@selector(changPage:) forControlEvents:UIControlEventTouchUpInside];
    [button1 setTitle:@"取消" forState:UIControlStateNormal];
    [self.view addSubview:button1];

    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(returnThekeyBorld:)];
    [self.view addGestureRecognizer:tap];
    [tap release];

    //创建单例
//    Single *single = [Single defaultSingle];
//    NSLog(@"%@", single);
//    Single *single1 = [Single defaultSingle];
//    NSLog(@"%@", single1);
//    Single *single2 = [Single defaultSingle];
//    NSLog(@"%@", single2);
}

- (void)returnThekeyBorld:(UITapGestureRecognizer *)tap
{
    for (UIView *view in self.view.subviews) {
        if ([view class] == [UITextField class]) {
            [view resignFirstResponder];
        }
    }
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (void)changPage:(UIButton *)button
{
    Single *single = [Single defaultSingle];
    single.nameString = field.text;
    NSLog(@"%@", single.nameString);
    HomeDetailViewController *detail = [[HomeDetailViewController alloc] init];
    detail.nameString = [NSString stringWithFormat:@"欢迎%@ 性别%@登陆成功", field.text, field1.text];
    [self.navigationController pushViewController:detail animated:YES];
    [detail release];
}

- (void)viewDidLoad
{
    self.view.backgroundColor = [UIColor redColor];
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.navigationItem.title = @"详情页";

    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(20, 0, 200, 100)];
    label.numberOfLines = 0;
    label.center = self.view.center;
//    label.text = _nameString;
    Single *single = [Single defaultSingle];
    label.text = single.nameString;
    label.textAlignment = NSTextAlignmentCenter;
    [self.view addSubview:label];
    [label release];
}

#import <Foundation/Foundation.h>

@interface Single : NSObject

@property (nonatomic, retain) NSString *nameString, *genderString;

//单例的创建方法
//1.类方法
//2.返回值类型是当前类
//3.方法名字:default + 类名
+ (Single *)defaultSingle;

#import "Single.h"

@implementation Single

+ (Single *)defaultSingle
{
    static Single *single = nil;
    if (single == nil) {
        single = [[Single alloc] init];
    }
    return single;
}

- (void)dealloc
{
    self.nameString = nil;
    self.genderString = nil;
    [super dealloc];
}

效果图如下所示:

　　 好了今天的总结就到这里了, 不为别的 只为每天进步一点点, 大家一起努力哈, 圆我们共同的IT梦!