18HWThread_UINavigationController_Title_Button_Hidden_UseStoryBoard

大綱

一、作業(yè)Homework_CircleMove0314
理論：不可在分線程中刷新UI，否則無法實現(xiàn)預(yù)期界面效果。

二、UINavigationController
項目：UINavigationController0315
理論：
棧：后進先出 隊列：先進先出

導(dǎo)航(NavController)：繼承于UIViewController，根據(jù)棧的原理，實現(xiàn)多個視圖的之間的切換功能。

界面跳轉(zhuǎn)方法共4種：①root②模態(tài)彈出③
④UINavigationController：
步驟：
1.創(chuàng)建ViewController
2.創(chuàng)建NavigationController，且設(shè)置vc為nav的root
3.將nav設(shè)置為window的root
進棧：pushViewController: animated:
出棧：pop
方法1：（到上一vc）popViewController
方法2：（到root）popToRootViewController
方法3：（到任意vc）popToViewController

三、Navigation_Title_Button
項目：Navigation_Title_Button0315
理論：
1.顯示導(dǎo)航欄標(biāo)題
1.1 方法1：self.title
1.2 方法2：self.navigationItem.title

2.添加導(dǎo)航按鈕
2.1 系統(tǒng)提供的方式
①initWithBarButtonSystemItem: target: action:
②initWithTitle: style: target: action:
③initWithImage: style: target: action:
2.2 自定義方式
步驟：
1.創(chuàng)建button，設(shè)置其bounds/action等
2.聲明UIBarButtonItem，并initWithCustomView:button
3.將button添加到nav

四、隱藏導(dǎo)航欄
項目：NavigationBar0315
理論：
設(shè)置導(dǎo)航隱藏：self.navigationController.navigationBarHidden = YES;
位置：一般設(shè)置在viewWillAppear:

五、使用storyBoard創(chuàng)建導(dǎo)航欄
項目：Navigation_UseStoryBoard0315
理論：
1.選中storyboard
2.點擊Editor→Embed In→Navigation Controller

正文

一、作業(yè)Homework_CircleMove0314
理論：不可在分線程中刷新UI，否則無法實現(xiàn)預(yù)期界面效果。
源碼：

- (void)viewDidLoad
{
    [super viewDidLoad];
    //1.在圓心添加太陽
    UIImageView *sun = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"fireball"]];
    sun.center = CGPointMake(CENTER_X, CENTER_Y);
    sun.bounds = CGRectMake(0, 0, 60, 60);
    [self.view addSubview:sun];
    //2.在圓周上添加地球
    UIImageView *earth = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"a"]];
    earth.center = CGPointMake(CENTER_X+RADIOUS, CENTER_Y);
    earth.bounds = CGRectMake(0, 0, 60, 60);
    [self.view addSubview:earth];
    //3.開啟分線程
    [NSThread detachNewThreadSelector:@selector(newThread:) toTarget:self withObject:earth];
}
//分線程
//處理耗時數(shù)據(jù)
- (void)newThread:(UIImageView *)earth
{
 //無限循環(huán)
    for (; ; )
    {
        [NSThread sleepForTimeInterval:0.01];
        //根據(jù)角度，計算x，y坐標(biāo)
        static float angle = 0;
        angle += 1;
        float huDu = angle / 180 * M_PI;
        _x = CENTER_X + RADIOUS * cos(huDu);
        _y = CENTER_Y + RADIOUS * sin(huDu);
        [self performSelectorOnMainThread:@selector(refreshUI:) withObject:earth waitUntilDone:NO];
    }
}
//主線程
//刷新UI
- (void)refreshUI:(UIImageView *)earth
{
    earth.center = CGPointMake(_x, _y);
}

二、UINavigationController
項目：UINavigationController0315
理論：
棧：后進先出 隊列：先進先出

導(dǎo)航(NavController)：繼承于UIViewController，根據(jù)棧的原理，實現(xiàn)多個視圖的之間的切換功能。

界面跳轉(zhuǎn)方法共4種：①root②模態(tài)彈出③
④UINavigationController：
步驟：
1.創(chuàng)建ViewController
2.創(chuàng)建NavigationController，且設(shè)置vc為nav的root
3.將nav設(shè)置為window的root
進棧：pushViewController: animated:
出棧：pop
方法1：（到上一vc）popViewController
方法2：（到root）popToRootViewController
方法3：（到任意vc）popToViewController

源碼：
文件：AppDelegate.m

    //1.創(chuàng)建視圖控制器
    ViewController1 *vc1 = [[ViewController1 alloc]init];
    //2.創(chuàng)建導(dǎo)航控制器,設(shè)置vc1為導(dǎo)航的根視圖控制器
    UINavigationController *nav = [[UINavigationController alloc]initWithRootViewController:vc1];
    //3.將nav作為window的根視圖控制器
    self.window.rootViewController = nav;

文件：ViewController1.m

//下一頁
//從vc1跳轉(zhuǎn)到vc2，實現(xiàn)壓棧（push/視圖換入）
- (IBAction)nextClick:(UIButton *)sender
{
    //1.創(chuàng)建vc2
    ViewController2 *vc2 = [[ViewController2 alloc]init];
    //2.壓棧，push
    [self.navigationController pushViewController:vc2 animated:YES];
}

文件：ViewController2.m

//從vc2跳轉(zhuǎn)到vc1，實現(xiàn)視圖的換出（pop/出棧）
//由3種方式
- (IBAction)backClick:(UIButton *)sender
{
    //pop
    //方法1：直接返回到上一級界面
    [self.navigationController popViewControllerAnimated:YES];
    //方法2：返回到根視圖控制器
    [self.navigationController popToRootViewControllerAnimated:YES];
    //方法3：
    [self.navigationController popToViewController: animated:YES];
}
//跳轉(zhuǎn)到vc3
- (IBAction)nextClick:(UIButton *)sender
{
    ViewController3 *vc3 = [[ViewController3 alloc]init];
    [self.navigationController pushViewController:vc3 animated:YES];
}

文件：ViewController4.m

//vc4到vc2
- (IBAction)backClick:(UIButton *)sender
{
    //第三種pop
    //先找到vc2
    //1.獲取數(shù)組
    NSArray *vcArr = [self.navigationController viewControllers];
    //2.獲取vc2
    ViewController2 *vc2 = [vcArr objectAtIndex:1];
    //3.popTo vc2
    [self.navigationController popToViewController:vc2 animated:YES];
}

三、Navigation_Title_Button
項目：Navigation_Title_Button0315
理論：
1.顯示導(dǎo)航欄標(biāo)題
1.1 方法1：self.title
1.2 方法2：self.navigationItem.title

2.添加導(dǎo)航按鈕
2.1 系統(tǒng)提供的方式
1>initWithBarButtonSystemItem: target: action:
2>initWithTitle: style: target: action:
3>initWithImage: style: target: action:
2.2 自定義方式
步驟：
1.創(chuàng)建button，設(shè)置其bounds/action等
2.聲明UIBarButtonItem，并initWithCustomView:button
3.將button添加到nav

源碼：

    //1.顯示導(dǎo)航標(biāo)題
    //方法1：
    //title:Localized title for use by a parent controller
    self.title = @"主題";
    //方法2：
    //navigationItem:
    //The navigation item used to represent the view controller in a parent’??s navigation bar. (read-only)
    self.navigationItem.title = @"設(shè)置";
    
    //2.添加導(dǎo)航按鈕
    //2.1 系統(tǒng)提供的幾種方式
    //（1）系統(tǒng)圖形按鈕
    UIBarButtonItem *item1 = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:self action:@selector(photoClick:)];
    //self.navigationItem.rightBarButtonItem = item1;
    //（2）文字按鈕
    UIBarButtonItem *item2 = [[UIBarButtonItem alloc]initWithTitle:@"刪除" style:UIBarButtonItemStylePlain target:self action:@selector(deleteClick)];
//    self.navigationItem.leftBarButtonItem = item2;
    //（3）圖片按鈕
    //創(chuàng)建圖片
    UIImage *image =  [UIImage imageNamed:@"scratch"];
    //設(shè)置圖片渲染模式
    image = [image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    //使用渲染過后的圖片
    UIBarButtonItem *item3 = [[UIBarButtonItem alloc]initWithImage:image style:UIBarButtonItemStylePlain target:self action:@selector(animationButton)];
    //創(chuàng)建item數(shù)組
    NSArray *itemArr = [[NSArray alloc]initWithObjects:item1,item3, nil];
    //將item數(shù)組賦給nav
    self.navigationItem.rightBarButtonItems = itemArr;
    
    //2.2 自定義
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    //注意：位置坐標(biāo)不起作用
//    button.center = CGPointMake(100, 30);
    button.bounds = CGRectMake(0, 0, 40, 40);
    button.backgroundColor = [UIColor redColor];
    [button addTarget:self action:@selector(click) forControlEvents:UIControlEventTouchUpInside];
    UIBarButtonItem *item4 = [[UIBarButtonItem alloc]initWithCustomView:button];
    NSArray *itemArr2 = [[NSArray alloc]initWithObjects:item2,item4, nil];
    self.navigationItem.leftBarButtonItems = itemArr2;

四、隱藏導(dǎo)航欄
項目：NavigationBar0315
理論：
設(shè)置導(dǎo)航隱藏：self.navigationController.navigationBarHidden = YES;
位置：一般設(shè)置在viewWillAppear:

源碼：

//在將要顯示時，設(shè)置Hidden
//而不是在viewDidLoad設(shè)置
- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    self.navigationController.navigationBarHidden = YES;
}

五、使用storyBoard創(chuàng)建導(dǎo)航欄
項目：Navigation_UseStoryBoard0315
理論：
1.選中storyboard
2.點擊Editor→Embed In→Navigation Controller

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