第二周笔记

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1. 访问网络 加载数据 并显示在标签上

NSString *path = @"http://c.3g.163.com/nc/article/list/  T1348649079062/0-20.html"; // 构建网址

NSURL *url=[NSURL URLWithString:path];

NSData *data=[[NSData alloc]initWithContentsOfURL:url]; // 访问 并得到结果 

NSDictionary *dic=[NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];  // 解析数据1.

NSArray *array = dic[@"T1348649079062"]; //2

NSDictionary *dict = array[0];//3

NSString *name = dict[@"tname”];//4

UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 100, 100, 30)];  //创建标签

label.backgroundColor = [UIColor lightGrayColor];

label.textColor = [UIColor redColor];

label.text = name;

[self.view addSubview:label];

2.自定义tabbar

    // 创建 UITabBarController 作为根视图控制器

在UITabBarController的

//1. 隐藏系统的tabBar显示自己的tabBar

    self.tabBar.hidden = YES;

// 2.创建背景图 

      UIImageView *back = [[UIImageView alloc]initWithFrame:CGRectMake(0, Screen_Height-50, Screen_Width, 50)];

    // 注意1：背景透明

    back.backgroundColor = [UIColor clearColor];

    back.image = [UIImage imageNamed:@"导航栏"];

    //注意2： 打开交互 ，为了图片可以添加点击事件

    back.userInteractionEnabled = YES;

    [self.view addSubview:back];

//3.创建tabbar按钮

           // 未选中状态

NSArray *images = [[NSArray alloc]initWithObjects:@"tab_0", @"tab_1",@"3",@"tab_3",@"tab_2",nil];

    // 选中状态

    NSArray *Selectimages = [[NSArray alloc]initWithObjects:@"tab_c0@2x", @"tab_c1@2x",@"3",@"tab_c3@2x",@"tab_c2@2x",nil];

    // 摆放按钮

    float width = Screen_Width/5.0f;

    float height = 30;

    for (int i=0; i<5 ; i++) {

        UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];

        button.frame = CGRectMake(width*i, 12, width, height);

        button.backgroundColor = [UIColor clearColor];

        // 给一个tag值，来区分点击的是哪个

        button.tag = baseTag + i;

        // 添加事件

        [button addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside];

        // 给button添加图片

        [button setImage:[UIImage imageNamed:images[i]] forState:UIControlStateNormal];

        [button setImage:[UIImage imageNamed: Selectimages[i]] forState:UIControlStateSelected];

        // 设置button的选中状态

        // 默认第0个是选中状态

        button.selected = i == 0;

        self.lastSelectTag = baseTag;

        [back addSubview:button];

//3.点击事件的处理

- (void)buttonAction:(UIButton *)button

{

    // 1、判断是不是把这个按钮点了两次，如果是就return

    if (button.tag == self.lastSelectTag) {

        return;

    }

    // 2、把当前选中的按钮点亮

    button.selected = YES;

    // 3、把上次选中的按钮还原

              UIButton *lastButton = (UIButton *)[self.view viewWithTag:self.lastSelectTag];

//    lastButton.selected = NO;

    // 记录当前选中按钮的tag值

    self.lastSelectTag = button.tag;

    self.selectedIndex = button.tag - baseTag;

}

        // 根据字符串创建类

        Class class = NSClassFromString(arr[i]);

        // 根据类创建对象

        RootViewController *vc = [[class alloc]init];

        // 全部加导航

3.手势1

  三个方法

   - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

 - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event

 - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event

// 1. 获取手指当前的位置

    UITouch *touch = [touches anyObject];

    CGPoint location = [touch locationInView:self.view];

    // 2. 获取手指上一个位置

    CGPoint preLocation = [touch previousLocationInView:self.view];

3.手势2

// 让视图支持多根手指点击事件

    [self.view setMultipleTouchEnabled:YES];

4其他控件

分段控制器

// 1. 实例化分段控制器

    UISegmentedControl *segmentedC = [[UISegmentedControl alloc] initWithFrame:CGRectMake(100, 100, 200, 30)];

    添加分段（文字）

    [segmentedC insertSegmentWithTitle:@"第一个" atIndex:0 animated:NO];

    [segmentedC insertSegmentWithTitle:@"第二个" atIndex:1 animated:NO];

    [segmentedC insertSegmentWithTitle:@"第三个" atIndex:2 animated:NO];

    添加分段（图片）

    [segmentedC insertSegmentWithImage:[UIImage imageNamed:@"0"] atIndex:3 animated:NO];

    添加点击事件

    [segmentedC addTarget:self action:@selector(clickSegmentedC:) forControlEvents:UIControlEventValueChanged];

    // 4.默认选择某个分段

    segmentedC.selectedSegmentIndex = 1;

    // 5. 设置颜色

    segmentedC.tintColor = [UIColor redColor];

    // 6.修改某个分段标题

    [segmentedC setTitle:@"FIRST" forSegmentAtIndex:0];

    // 7.修改某个分段标题图片

    [segmentedC setImage:[UIImage imageNamed:@""] forSegmentAtIndex:3];

    // 8. 读取某个分段的标题

    NSString *titleStr = [segmentedC titleForSegmentAtIndex:0];

    // 9. 读取某个分段的图片

    UIImage *image = [segmentedC imageForSegmentAtIndex:3];

    // 10.添加到界面

//    [self.view addSubview:segmentedC];

    self.navigationItem.titleView = segmentedC;

// 获取用户点击的位置

    NSInteger index = sender.selectedSegmentIndex;

UISlider

    // 设置大小位置(默认高度)设置高度没有用

    UISlider *slider = [[UISlider alloc] initWithFrame:CGRectMake(100, 100, 300, 100)];

    // 设置最小值

    slider.minimumValue = 0;

    // 设置最大值

    slider.maximumValue = 100;

    // 设置初始值

    slider.value = 40;

    // 添加滑动事件

    [slider addTarget:self action:@selector(moveSlider:) forControlEvents:UIControlEventValueChanged];

UISwitch

 // 设置默认

    swith.on = NO;

    // 添加点击事件

    [swith addTarget:self action:@selector(moveSwith:) forControlEvents:UIControlEventValueChanged];

UIActivityIndicatorView

 UIActivityIndicatorView *acticityIV = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];

    // 设置位置 和 大小

    acticityIV.frame = CGRectMake(100, 100, 50, 50);

    acticityIV.backgroundColor = [UIColor lightGrayColor];

    // 启动旋转

     [acticityIV startAnimating];

    // 停止旋转

     [acticityIV stopAnimating];

       // 显示

    acticityIV.hidesWhenStopped = NO;

    [self.view addSubview:acticityIV];

UIProgressView

    // 设置大小和位置(高度无法改变)

    _pregressView = [[UIProgressView alloc] initWithFrame:CGRectMake(10, 100, 300, 20)];

    // 进度条的颜色

    _pregressView.progressTintColor = [UIColor redColor];

    // 进度条的背景颜色

    _pregressView.trackTintColor = [UIColor blackColor];

    [self.view addSubview:_pregressView];

UIStepper

    // 大小固定

    UIStepper *stepper = [[UIStepper alloc] initWithFrame:CGRectMake(100, 200, 50, 50)];

    // 最大值

    stepper.maximumValue = 15;

    // 最小值

    stepper.minimumValue = 1;

    // 每次点击添加的数量

    stepper.stepValue = 2;

    // 添加点击事件

    [stepper addTarget:self action:@selector(clickStepper:) forControlEvents:UIControlEventValueChanged];

    // 是否循环

    [stepper setWraps:NO]

UIAlertView 

UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"提示标题" message:@"请输入账号和密码，不要被别人看到(⊙o⊙)哦" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:@"取消",@"??",@"(*^__^*) 嘻嘻……",@"(⊙o⊙)…", nil];

alertView.alertViewStyle = UIAlertViewStyleLoginAndPasswordInput;

 UIWebView

_webView = [[UIWebView alloc] initWithFrame:self.view.frame];

    // 2. 获取Url

    NSURL *url = [NSURL URLWithString:@"http://www.baidu.com"];

    NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];

    // 3. 请求加载网址

    [_webView loadRequest:urlRequest];

    // 4. 自适应屏幕大小

    [_webView setScalesPageToFit:YES];

    // 5. 设置代理

    _webView.delegate = self;

    [self.view addSubview:_webView];

webViewDelegate

将要加载

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType

{

    return YES;

}

  已经开始加载

- (void)webViewDidStartLoad:(UIWebView *)webView

{

}

   加载完成

- (void)webViewDidFinishLoad:(UIWebView *)webView

{

}

   加载有误

- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error

{

    NSLog(@"%@",error);

}

MPMoviePlayerViewController

  #import <MediaPlayer/MediaPlayer.h>

// 1. 获取视频路径(沙盒路径)

    NSString *path = [[NSBundle mainBundle] pathForResource:@"1" ofType:@"mp4"];

    // 2. 获取视屏的URL

    NSURL *url = [NSURL fileURLWithPath:path];

    // 3. 判断是否存在MPMoviePlayerViewController

    if (!_moviePlayerVC) {

        _moviePlayerVC = [[MPMoviePlayerViewController alloc] initWithContentURL:url];

    }

    // 4.模态推出

    [self presentViewController:_moviePlayerVC animated:YES completion:nil];

    // 5. 设置播放的样式

    _moviePlayerVC.moviePlayer.movieSourceType = MPMovieSourceTypeFile;

    // 6. 开始播放

    [_moviePlayerVC.moviePlayer play];

UITextView 和 UITextField 

scrollView

   _scrollView = [[UIScrollView alloc]initWithFrame:self.view.frame];

    _scrollView.backgroundColor = [UIColor redColor];

#pragma mark - _scollView 可以显示的区域  参数1：

    _scrollView.contentSize = CGSizeMake(screenW *7, 0);

    [self.view addSubview:_scrollView];

#pragma mark - 是否分页显示

    _scrollView.pagingEnabled = YES;

#pragma mark - 滚动条的隐藏与显示

    _scrollView.showsHorizontalScrollIndicator = NO;

    _scrollView.showsVerticalScrollIndicator = NO;

#pragma mark - 弹簧效果

    _scrollView.bounces = NO;

#pragma mark - 不用手指滑动

//    _scrollView.scrollEnabled = NO;

#pragma

    _scrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite;

#pragma mark - 加个Label

//    UILabel *labe = [[UILabel alloc]initWithFrame:CGRectMake(90, 20, 178, 20)];

//    labe.backgroundColor = [UIColor blackColor];

//    [_scrollView addSubview:labe];

#pragma mark - 加个picture

    for (int i = 0; i< 8; i++) {

        CGFloat imageViewW = screenW;

        CGFloat imageViewX = screenW * (i - 1);

        CGFloat imageViewH = self.view.frame.size.height;

        UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(imageViewX, 0, imageViewW, imageViewH)];

        NSString *imagename = [NSString stringWithFormat: @"%d.jpg",i];

        imageView.image = [UIImage imageNamed:imagename];

        [_scrollView addSubview:imageView];

    }

pagecontrol

   _pagecontrol = [[UIPageControl alloc]initWithFrame:CGRectMake(0, self.view.frame.size.height - 100 , screenW, 40)];

#pragma mark - 添加个数

    _pagecontrol.numberOfPages = 7;

#pragma mark - 颜色

    _pagecontrol.pageIndicatorTintColor = [UIColor redColor];// 未选中

    _pagecontrol.currentPageIndicatorTintColor = [UIColor greenColor];// 选中

#pragma mark - 交互

    _pagecontrol.userInteractionEnabled = NO;

#pragma mark - 点击事件

    [self.view addSubview:_pagecontrol];

5.单例

#pragma mark - 1.定义一个静态变量

static JianBingGuoZi *_guozi;

@implementation JianBingGuoZi

#pragma mark - 2.s、实现shared方法

+ (instancetype)sharedJianBingGuoZi{

    if (_guozi == nil) {

        _guozi = [[JianBingGuoZi alloc]init];

    }

    return _guozi;

}

#pragma mark - 3.重写allocWithZone方法  线程俺去

+ (instancetype)allocWithZone:(struct _NSZone *)zone{

    static dispatch_once_t once;

    dispatch_once(&once, ^{

        _guozi = [super allocWithZone:zone];

    });

    return _guozi;

}

第二周笔记

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原文地址：http://www.cnblogs.com/fanwenzheIOS/p/4966675.html