#import "ViewController.h"

@interface ViewController ()
{
    UIView *myview;
}
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
//    初始化myview
    myview = [[UIView alloc]initWithFrame:CGRectMake(100,100, 100, 100)];
//    设置背景色
    myview.backgroundColor = [UIColor lightGrayColor];
//    添加到视图上
    [self.view addSubview:myview];
    
}
//开始触摸，只调用一次
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
    NSLog(@"touch began");
}
//开始移动，会多次调用
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
    NSLog(@"----");
//    UITouch
//    用来保存跟手指相关的信息，比如：触摸的位置
//    当手指移动时，系统会更新同一个UIToch对象，使之能够一直保存该手指在的触摸位置
//    当手指离开屏幕时，系统会销毁对应的UITouch对象
//
//    从touches中取出手指
    UITouch *touch = [touches anyObject];
    
    if (touch.view == myview) {
        
        //    该方法记录了前一个触摸点的位置
        CGPoint previousPoint = [touch previousLocationInView:self.view];
        
        /*
         返回值表示触摸在self.view上的位置
         这里的位置是针对self.view的坐标系（以self.view的左上角为原点（0,0））
         如果传nil时，返回的触摸点在UIWindow的位置
         */
        
        //    该方法记录了当前点的位置
        CGPoint currentPoint = [touch locationInView:self.view];
        
        NSLog(@"1------>%@",NSStringFromCGPoint(previousPoint));
        NSLog(@"2------>%@",NSStringFromCGPoint(currentPoint));
        //    获取x偏移量
        CGFloat x = currentPoint.x - previousPoint.x;
        //    获取y偏移量
        CGFloat y = currentPoint.y - previousPoint.y;
        
        //    获取myview中心点
        CGPoint center = myview.center;
        
        center.x += x;
        center.y += y;
        
        myview.center = center;
    }
}
//结束触摸，只调用一次
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
    NSLog(@"touch end");
}
//触摸取消（例如来电打断）
-(void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event{
    
}
@end

#import "ViewController.h"

@interface ViewController ()<UIScrollViewDelegate>//遵守协议

{
//    滚动视图
    UIScrollView *_scrollView;
    
}

@property (weak, nonatomic) IBOutlet UIButton *myButton;
@end

@implementation ViewController

- (IBAction)onClick:(UIButton *)sender {
    [_scrollView setContentOffset:CGPointMake(0, 0) animated:YES];
}

- (void)viewDidLoad {
    [super viewDidLoad];
    
    [self createScrollView];
    [self addSubView];
    [self customScrollView];
    
    [self.view bringSubviewToFront:self.myButton];
    
    /*
//    [self.myButton  addTarget:self action:@selector(onClick) forControlEvents:UIControlEventTouchUpInside];
    
    //-(void)onClick{
    //    NSLog(@"onClick");
    //}
     */
    
 
}


//创建ScrollView
-(void)createScrollView{
//    初始化UIScrollView
    _scrollView = [[UIScrollView alloc]initWithFrame:self.view.bounds];
    
//    _scrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(100, 100, 200, 200)];
//    设置背景色
    _scrollView.backgroundColor = [UIColor orangeColor];
//    设置代理
    _scrollView.delegate = self;
    
    [self.view addSubview:_scrollView];
    
}
-(void)addSubView{
//    获取文件路径
    NSString *path = [[NSBundle mainBundle]pathForResource:@"海贼02" ofType:@"jpg"];
//    转换成NSData
    NSData *data = [NSData dataWithContentsOfFile:path];
//    初始化图片
    UIImage *image = [UIImage imageWithData:data];
//    图片初始化后，会直接获得图片的width 和 height
//    NSLog(@"width = %lf---height = %lf",image.size.width,image.size.height);

//     初始化UIImageView
    UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, image.size.width, image.size.height)];
    imageView.image = image;
    
//    设置滚动范围
//    必须给出滚动范围，这样滚动视图才能知道滚动的范围
    _scrollView.contentSize = CGSizeMake(image.size.width, image.size.height);
    
    
    [_scrollView addSubview:imageView];
}
// 定制ScrollView
-(void)customScrollView{
    
//    设置偏移量
//    [_scrollView setContentOffset:CGPointMake(200, 200)];

//    设置距离边框的距离
//    [_scrollView setContentInset:UIEdgeInsetsMake(100, 100, 100, 100)];
    
#pragma mark 滚动相关
    
//    设置是否可以超出边界
//    默认是YES，超出边界后，有回弹效果
//    设置NO，没有回弹效果
    _scrollView.bounces = YES;
    
//    在这里，想测试下面两个属性时，使用《海贼03.jpg》
//    当contentSize的宽度小于scrollView的宽度时，仍允许左右拖动，默认是NO
    _scrollView.alwaysBounceHorizontal = YES;
//    当contentSize的高度小于scrollView的高度时，仍允许上下手动，默认是NO
    _scrollView.alwaysBounceVertical = YES;
    
//    设置是否按页滚动，即每次滚动一个scrollView的宽度或高度，默认是NO
//    _scrollView.pagingEnabled = YES;
    
//    设置是否允许滚动，默认是YES
    _scrollView.scrollEnabled = YES;
    
//    设置是否显示滚动指示，默认是YES
    _scrollView.showsHorizontalScrollIndicator = YES;
    _scrollView.showsVerticalScrollIndicator = YES;
    
//    设置滚动指示的样式
    _scrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite;
//    UIScrollViewIndicatorStyleDefault,
//    UIScrollViewIndicatorStyleBlack,
//    UIScrollViewIndicatorStyleWhite
    
//    设置滚动条距离scrollView边框的距离
    _scrollView.scrollIndicatorInsets = UIEdgeInsetsMake(0, 0, 30, 60);
    
    _scrollView.scrollsToTop = YES;
    
}
#pragma mark scrollView delegate
//将要拖拽
//当开始滚动视图时，会执行该方法
//一次有效的滑动执行一次（开始滑动到手指松开），
-(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{
    NSLog(@"将要拖拽");
}
//scrollView滚动时，就会调用该方法
//任何offset值的改变都会调用该方法。在滚动过程中，会调用多次
-(void)scrollViewDidScroll:(UIScrollView *)scrollView{
 //   CGPoint point = scrollView.contentOffset;
//    NSLog(@"偏移量%lf",point.x);
}
-(void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset{
    NSLog(@"将要结束拖拽");
}
//当手指离开屏幕的一瞬间，调用该方法，一次有效的滑动，只执行一次
-(void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate{
//    NSLog(@"%lf",scrollView.contentOffset.x);
    NSLog(@"拖拽结束");
//    [scrollView setContentOffset:CGPointMake(0, 0) animated:YES];
}

//将要减速
//该方法在scrollViewDidEndDragging 结束后执行
-(void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView{
    NSLog(@"将要减速");
}

-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
    NSLog(@"减速结束");
    
//    [scrollView setContentOffset:CGPointMake(0, 0) animated:YES];
}
@end

#pragma mark 缩放 delegate
//当将要开始缩放时，执行该方法。一次有效的缩放，执行一次
-(void)scrollViewWillBeginZooming:(UIScrollView *)scrollView withView:(UIView *)view{
    NSLog(@"将要开始缩放");
}
//正在缩放
-(void)scrollViewDidZoom:(UIScrollView *)scrollView{
    NSLog(@"正在缩放");
    CGFloat value =  scrollView.zoomScale;
    NSLog(@"%f",value);
}
//结束缩放
-(void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(CGFloat)scale{
    NSLog(@"结束缩放");
}

//返回要缩放的UIView对象
-(UIView*)viewForZoomingInScrollView:(UIScrollView *)scrollView{
//  不允许返回scrollView
//  只能返回scrollView的子视图
    return scrollView.subviews[0];
}

//当用户点击状态栏后，滚动视图是否能够滚动到顶部
-(BOOL)scrollViewShouldScrollToTop:(UIScrollView *)scrollView{
//    当设置scrollToTop 为YES时，这里设置YES才会生效
    return NO;
}
//当滚动视图滚动到最顶端的时候，会执行该方法
-(void)scrollViewDidScrollToTop:(UIScrollView *)scrollView{
    NSLog(@"%s",__func__);
}

#import "AppDelegate.h"
#import "RootViewController.h"
@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    //初始化window
    self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
    //设置背景颜色
    self.window.backgroundColor = [UIColor whiteColor];
    //视图控制器
    RootViewController *rootVC = [[RootViewController alloc]init];
//    初始化导航控制器，并设置基栈
    UINavigationController *nav = [[UINavigationController alloc]initWithRootViewController:rootVC];
    nav.view.backgroundColor = [UIColor redColor];
    
    
    //系统控制器设置为自创的
    self.window.rootViewController = nav;
    
    //让self.window 显示
    [self.window makeKeyAndVisible];
    
    return YES;
}

#import "RootViewController.h"
#import "SecondViewController.h"
@interface RootViewController ()

@end

@implementation RootViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    
    [self.view setBackgroundColor:[UIColor yellowColor]];
    
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = CGRectMake(100, 100, 100, 50);
    [button setTitle:@"下一级" forState:UIControlStateNormal];
    button.backgroundColor = [UIColor lightGrayColor];
    [button addTarget:self action:@selector(onClick) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];
    
    [self settingNavgationBar];
}
-(void)settingNavgationBar{
    
    UINavigationBar *bar = self.navigationController.navigationBar;
    
//    设置navigationBar 的类型
    self.navigationController.navigationBar.barStyle = UIBarStyleBlack;
//    UIBarStyleDefault
//    UIBarStyleBlack
    
//    透明度(毛玻璃)
    bar.translucent = YES;
//    设置yes，子视图的坐标原点是（0,0）
//    设置no,子视图的坐标原点是(0,64)
    UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 100, 100)];
    label.backgroundColor = [UIColor greenColor];
    [self.view addSubview:label];
    
//    设置导航条颜色
    [bar setBarTintColor:[UIColor redColor]];
    
//    设置标题
//    self.title = @"root";
    self.navigationItem.title = @"root";
    
//    导航条按钮字体颜色
    [bar setTintColor:[UIColor cyanColor]];
    
//    设置导航条字体颜色
    [bar setTitleTextAttributes:@{
                                 NSFontAttributeName:[UIFont systemFontOfSize:20],
                                 NSForegroundColorAttributeName:[UIColor purpleColor]
                                 }];
    
//    设置隐藏导航条
//    self.navigationController.navigationBarHidden = YES;
    
    [bar setBackgroundImage:[UIImage imageNamed:@"header_bg44"] forBarMetrics:UIBarMetricsDefault];
//    UIBarMetricsDefault 横竖屏都显示
//    UIBarMetricsCompact 竖屏显示
    
    
//    self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:@"返回" style:UIBarButtonItemStylePlain target:secondVc     action:@selector(abc)];
    
    UIImage *image = [UIImage imageNamed:@"qq.png"];
//    对图片进处理
   image =  [image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    
//    UIImageRenderingModeAutomatic,返回一个色块
//    UIImageRenderingModeAlwaysOriginal,返回图片本身       UIImageRenderingModeAlwaysTemplate,返回一个色块
    
//    UIBarButtonItemStylePlain,
//    UIBarButtonItemStyleDone,
    
//    leftBarButtonItem 左按钮
    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]initWithImage:image style:UIBarButtonItemStylePlain target:self     action:@selector(leftClick)];
//    rightBarButtonItem 右按钮
    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithTitle:@"right" style:UIBarButtonItemStyleDone target:self action:@selector(rightClick)];
    
    UIBarButtonItem *item1 = [[UIBarButtonItem alloc]initWithTitle:@"item1" style:UIBarButtonItemStylePlain target:self action:@selector(rightClick)];
    
    UIBarButtonItem *item2 = [[UIBarButtonItem alloc]initWithTitle:@"item2" style:UIBarButtonItemStylePlain target:self action:@selector(rightClick)];
    

    
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = CGRectMake(0, 0, 40, 40);
    [button setBackgroundColor:[UIColor redColor]];
    
    [button setImage:image forState:UIControlStateNormal];
    
//    添加一个自定义的UIButton
    UIBarButtonItem * item3 = [[UIBarButtonItem alloc]initWithCustomView:button];
    
    //    设置rightBarButtonItems时，会把rightBarButtonItem 覆盖
    self.navigationItem.rightBarButtonItems = @[item1,item2,item3];
    
    UILabel *label1 = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 100, 44)];
    label1.backgroundColor = [UIColor redColor];
    label1.text = @"label";
    
    UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 100, 40)];
    imageView.image = image;
//    设置titleView
    self.navigationItem.titleView = imageView;
    
}
-(void)leftClick{
    NSLog(@"---");
}
-(void)rightClick{
    NSLog(@"%s",__func__);
}
-(void)onClick{
    
    SecondViewController *secondVc = [[SecondViewController alloc]init];
//    进入下一级（入栈）
    [self.navigationController pushViewController:secondVc animated:YES];
    
    
}
@end


#import "SecondViewController.h"
#import "ThirdViewController.h"
@interface SecondViewController ()

@end

@implementation SecondViewController
-(void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
//    视图将要出现的时候，隐藏navgationBar
        self.navigationController.navigationBarHidden = YES;
}
-(void)viewWillDisappear:(BOOL)animated{
    [super viewWillDisappear:animated];
//    视图将要消失的时候，显示navgationBar
    self.navigationController.navigationBarHidden = NO;
}
- (void)viewDidLoad {
    [super viewDidLoad];
    

    
    [self.view setBackgroundColor:[UIColor greenColor]];
    
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = CGRectMake(100, 100, 100, 50);
    [button setTitle:@"下一级" forState:UIControlStateNormal];
    button.backgroundColor = [UIColor lightGrayColor];
    [button addTarget:self action:@selector(onClick) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];
    
    UIButton *button1 = [UIButton buttonWithType:UIButtonTypeCustom];
    button1.frame = CGRectMake(100, 200, 100, 50);
    [button1 setTitle:@"上一级" forState:UIControlStateNormal];
    button1.backgroundColor = [UIColor lightGrayColor];
    [button1 addTarget:self action:@selector(backClick) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button1];
}

-(void)abc{
    NSLog(@"----");
}
-(void)backClick{
//    返回上一级
    [self.navigationController popViewControllerAnimated:YES];
}
-(void)onClick{
    ThirdViewController *thirdVc = [[ThirdViewController alloc]init];
//    进入下一级（入栈）
    [self.navigationController pushViewController:thirdVc animated:YES];
    
    
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


@end

#import "ThirdViewController.h"
#import "ForthViewController.h"
@interface ThirdViewController ()

@end

@implementation ThirdViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    
    [self.view setBackgroundColor:[UIColor blueColor]];
    
    for (int i = 0 ; i < 3; i ++) {
        
        UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
        button.frame = CGRectMake(100, 100 + i * 60, 100, 50);
        button.tag = i + 10;
        if (i == 0 ) {
           [button setTitle:@"下一级" forState:UIControlStateNormal];
        }else if (i == 1){
            [button setTitle:@"上一级" forState:UIControlStateNormal];
        }else if (i == 2){
            [button setTitle:@"返回root" forState:UIControlStateNormal];
        }
        
        button.backgroundColor = [UIColor lightGrayColor];
        [button addTarget:self action:@selector(onClick:) forControlEvents:UIControlEventTouchUpInside];
        [self.view addSubview:button];

        
    }
    
//    self.navigationController.viewControllers
    NSLog(@"%@",self.navigationController.viewControllers);
    
    [self toolBarSetting];
}

-(void)toolBarSetting{
    self.navigationController.toolbarHidden = NO;
    
    UIBarButtonItem *item = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemSave target:nil action:nil];
    
    UIBarButtonItem *item1 = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:nil action:nil];
    
    UIBarButtonItem *item2 = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemEdit target:nil action:nil];
    
    UIBarButtonItem *item3 = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
    
    
    self.toolbarItems = @[item,item3,item1,item2];
    
}
-(void)onClick:(UIButton*)button{
    if (button.tag == 10) {
        ForthViewController *forthVc = [[ForthViewController alloc]init];
//       把forthVc 入栈
        [self.navigationController pushViewController:forthVc animated:YES];
    }
    if (button.tag == 11) {
//        返回上一级
        [self.navigationController popViewControllerAnimated:YES];
    }
    if (button.tag == 12) {
//        返回root(基栈)
        [self.navigationController popToRootViewControllerAnimated:YES];
    }
}


@end

#import "ForthViewController.h"

@interface ForthViewController ()

@end

@implementation ForthViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
//    设置背景色
    [self.view setBackgroundColor:[UIColor orangeColor]];
//    初始化button
    for (int i = 0 ; i < 3; i ++) {
        
        UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
        button.frame = CGRectMake(100, 100 + i * 60, 100, 50);
        button.tag = i + 10;
        if (i == 0 ) {
            [button setTitle:@"返回第二级" forState:UIControlStateNormal];
        }else if (i == 1){
            [button setTitle:@"上一级" forState:UIControlStateNormal];
        }else if (i == 2){
            [button setTitle:@"返回root" forState:UIControlStateNormal];
        }
        
        button.backgroundColor = [UIColor lightGrayColor];
        [button addTarget:self action:@selector(onClick:) forControlEvents:UIControlEventTouchUpInside];
        [self.view addSubview:button];
        
        
    }
    
}
-(void)onClick:(UIButton*)button{
    if (button.tag == 10) {
//       根据数组下标 获取要返回到的UIViewController
        UIViewController *VC =   self.navigationController.viewControllers[1];
//        返回到指定的UIViewController
        [self.navigationController popToViewController:VC animated:YES];
    }
    if (button.tag == 11) {
//        返回上一级
        [self.navigationController popViewControllerAnimated:YES];
    }
    if (button.tag == 12) {
//        返回到root(基栈)
        [self.navigationController popToRootViewControllerAnimated:YES];
    }
}
@end

#import "ViewController.h"

@interface ViewController ()
{
    NSTimer *_timer;
}
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
// 初始化UIProgressView并设置frame
//    UIProgressView 高度是固定的
    UIProgressView *progressView = [[UIProgressView alloc]initWithFrame:CGRectMake(100, 100, 200, 100)];
//    设置进度
//    0.0 .. 1.0, default is 0.0.
    progressView.progress = 0.25;
//    已加载进度的颜色
    progressView.progressTintColor = [UIColor redColor];
//    未加载进度的颜色
    progressView.trackTintColor = [UIColor greenColor];
//    设置图片会覆盖上面设置的颜色
//    已加载进度的图片
    progressView.progressImage = [UIImage imageNamed:@"1"];
//    未加载进度的图片
    progressView.trackImage = [UIImage imageNamed:@"2"];
    
//    设置tag值
    progressView.tag = 10;
    
//    添加到视图
    [self.view addSubview:progressView];
    
//    初始化timer
    _timer = [NSTimer     scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(timerRun) userInfo:nil repeats:YES];
    
}
-(void)timerRun{
    UIProgressView *progressView = (UIProgressView *)[self.view viewWithTag:10];
    
    if (progressView.progress < 1.0) {
        progressView.progress += 0.01;
    }else{
        NSLog(@"下载完成");
//        使计时器失效
        [_timer invalidate];
    }
    
}
@end

//【文件管理类 NSFileManager】
		NSError * error = nil;//0
        //ARC NSError __autorelease * error = nil;
        //1.查看指定目录里面的文件(浅度遍历)
        //第一个参数，要查看的文件夹路径
        //第二个参数，错误信息
        NSArray * fileContentsArray = [fm contentsOfDirectoryAtPath:PATH error:&error];
        //操作文件，一定要有错误信息的判断，如果文件操作失败，没有做处理，后面的程序100%挂掉
        if (error) {
            //perror 打印错误信息
            perror("contentsOfDirectoryAtPath");
        }
		//2.查看所有在这个文件夹下的文件(深度遍历)
        //第一个参数，要查看的文件夹路径
        //第二个参数，错误信息
        NSArray * allFileContentsArray = [fm subpathsOfDirectoryAtPath:PATH 					error:&error];

		//第一个参数:要创建文件夹的路径 这个路径是带有要创建的文件夹名的
        //第二个参数:BOOL类型，控制，是否创建中间文件夹
        //If YES, this method creates any non-existent parent directories as part of 		creating the directory in path. If NO, this method fails if any of the 				intermediate parent directories does not exist. This method also fails if any 		of the intermediate path elements corresponds to a file and not a directory.
        //如果要创建的文件夹，含有中间路径，那么YES，表示如果没有这个中间路径，我们就连带中间路径一起创		建，如果存在，不用管它
        //第三个参数:属性，创建文件夹的属性 默认属性nil
        //第四个参数:错误信息
        //返回值BOOL 判断创建是否成功
        [fm createDirectoryAtPath:dstPath withIntermediateDirectories:YES 					attributes:nil error:&error];
 		//创建一个普通文件
        //第一个参数:路径,这个路径是带有所要创建的文件名
        //第二个参数:文件的内容，NSData 是OC当中二进制文件格式
        //第三个参数:属性，默认nil
        //利用他的返回值做出错判断
        //NSString  转 NSData
        NSString * str = @"今天赵雨铭同学，要给大家讲电子图书类!!!";
        NSData * data = [str dataUsingEncoding:NSUTF8StringEncoding];
        BOOL ret = [fm createFileAtPath:[PATH 												stringByAppendingPathComponent:@"1.txt"]contents:data attributes:nil];

		//删除文件夹 和 普通文件 是一个方法
        //删除是不可逆的~~~
        //第一个参数:路径是带有要删除的文件信息的
        //第二个参数:错误信息
        [fm removeItemAtPath:PATH error:&error];

		//copy文件
        //第一个参数:要复制的原路径，带有文件名 或者 文件夹名
        //第二个参数:目标路径  必须加上要复制过去的文件名,这个文件名可以重命名
        //第三个参数:error信息
        [fm copyItemAtPath:[PATH stringByAppendingPathComponent:@"MID/test"]toPath:			[PATH stringByAppendingPathComponent:@"test"] error:&error];


	 	//移动文件
        //第一个参数:要移动源文件路径
        //第二个参数:目标路径，也要带上文件名
        //第三个参数:error
        [fm moveItemAtPath:[PATH stringByAppendingPathComponent:@"1副本.txt"] toPath:		[PATH stringByAppendingPathComponent:@"1.txt"] error:&error];

		//判断文件是否存在
        //返回值BOOL YES 表示该文件存在，NO 表示该文件不存在
        BOOL ret = [fm fileExistsAtPath:[PATH 												stringByAppendingPathComponent:@"12.txt"]];
        if (ret) {
            NSLog(@"This file exist!");
        } else {
            NSLog(@"This file No exist!");
        }
        
        //判断这个文件是不是文件夹
        //返回值BOOL YES 表示这个路径的文件存在 NO 不存在
        //isDirectory 传入参数是一个BOOL *  YES 表示是一个文件夹，如果NO 表示是一个普通文件
        //- (BOOL)fileExistsAtPath:(NSString *)path isDirectory:(BOOL *)isDirectory;
        BOOL isDirectory = NO;
        ret = [fm fileExistsAtPath:[PATH stringByAppendingPathComponent:@"MIDd"] 			isDirectory:&isDirectory];
        
        if (ret) {
            if (isDirectory) {
                NSLog(@"This is a directory!");
            } else {
                NSLog(@"This is normal file!");
            }
        } else {
            NSLog(@"No such file or directory!");
        }
        
        //获取文件的属性
        NSDictionary * dic = [fm attributesOfItemAtPath:PATH error:&error];
        NSLog(@"%@",dic);
//      {
//        NSFileCreationDate = "2015-12-30 01:40:30 +0000";
//        NSFileExtensionHidden = 0;
//        NSFileGroupOwnerAccountID = 20;
//        NSFileGroupOwnerAccountName = staff;
//        NSFileModificationDate = "2015-12-30 03:27:14 +0000";
//        NSFileOwnerAccountID = 501;
//        NSFileOwnerAccountName = LXL;
//        NSFilePosixPermissions = 493;
//        NSFileReferenceCount = 12;
//        NSFileSize = 408;
//        NSFileSystemFileNumber = 3450634;
//        NSFileSystemNumber = 16777220;
//        NSFileType = NSFileTypeDirectory;
//      }

	
【文件句柄类 NSFileHandle】
        //创建一个读取文件的句柄
        NSFileHandle * fhForRead = [NSFileHandle fileHandleForReadingAtPath:PATH];
		//创建一个用于写入文件的句柄
        NSFileHandle * fhForWrite = [NSFileHandle fileHandleForWritingAtPath:PATH];
		//创建一个读写句柄
        NSFileHandle * fhForUpdating = [NSFileHandle fileHandleForUpdatingAtPath:PATH];
		
		//读取数据，读取的数据是一个二进制数据
        //这个读取文件的方式是要把文件全部读取到内存中去
        //在iOS程序中，都是采用这样的读取文件方式
        NSData * data = [fhForRead readDataToEndOfFile]; //EOF
		//读取指定长度的文件，字节数
		[fhForUpdating readDataOfLength:9];

		//写入数据是一个覆盖写
        [fhForWrite writeData:dataForWrite];
		//文件指示器到文件的末尾
        [fhForWrite seekToEndOfFile];
        //文件指示器，到文件的指定位置，这个位置是一个字节数
        [fhForWrite seekToFileOffset:<#(unsigned long long)#>]
		//把文件截短成100
        [fhForUpdating truncateFileAtOffset:10];


//【plist文件】 Property List
//在plist文件当中，只能保存一下几种数据NSString NSDate NSData NSNumber NSArray NSDictionary
//plist是一个可视化轻量级文件，通常是保存一下数据量不是太大的文件，QQ登陆信息
//XML文本
//数据对象NSArray NSDictionary

				//1.创建一个plist文件
        //第一个参数:代表要创建plist的路径，包括plist文件名
        //第二个参数:表示是否要原子操作
        [dict1 writeToFile:[PATH stringByAppendingPathComponent:@"dict.plist"] atomically:NO];
        
        [array writeToFile:[PATH stringByAppendingPathComponent:@"array.plist"] atomically:NO];


[file] - > [new] - >[file] - > [OS X] - > [Property List]

//2.读取plist
  NSArray * plistArray = [[NSArray alloc] initWithContentsOfFile:PATH];
 NSURL * url = [[NSURL alloc] initWithString:URL];
        NSDictionary * dict = [[NSDictionary alloc] initWithContentsOfURL:url];

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    
    //初始化window，并设置fram
    self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
    //[UIScreen mainScreen].bounds] 获取当前屏幕的大小
    
    //设置背景颜色
    [self.window setBackgroundColor:[UIColor purpleColor]];
    
    //Xcode 7.0 之后，必须有rootViewController
    //Xcode 7.0 之前，可以不设置rootViewController
    RootViewController * rootVC = [[RootViewController alloc]init];
    self.window.rootViewController = rootVC;
    //设置window为 keyWindow 并显示
    [self.window makeKeyAndVisible];
    

    return YES;
}
@implementation RootViewController
//视图已经加载
- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    //[self createUILabel];
    //[self  createNewLabel];
  //UILabel * label =(UILabel *)[self.view viewWithTag:9];
   // label.text = @"123";
    
}

-(void)createUILabel{
    
    //红50绿100蓝30
    //alpha 透明度，默认是1.0，取值范围0~1.0
    //利用RGB生成一个颜色
    //UIColor *color = [UIColor colorWithRed:50/255.0 green:100/255.0 blue:30/255.0 alpha:0.8];
    
    //设置self.view的背景色
    self.view.backgroundColor = [UIColor whiteColor];
    //CGRect rect = CGRectMake(50, 50, 100, 100);
    
    //初始化UILbel 并设置fram
    //重新设置fram，会把之前设置的fram覆盖
    UILabel * label = [[UILabel alloc] initWithFrame:CGRectMake(100, 100, 200, 200)];
    
    //设置label的背景色
    label.backgroundColor = [UIColor lightGrayColor];
    label.text = @"NSLineBreakByTruncatingTail,	    NSLineBreakByTruncatingMiddleNSLineBreakByTruncatingTail,NSLineBreakByTruncating ,MiddleNSLineBreakByTruncatingTail.NSLineBreakByTruncatingMiddleNSLineBreakByTruncatingTail,NSLineBreakByTruncatingMiddle";
    
    //设置字体的类型和大小
    label.font = [UIFont systemFontOfSize:20];
    
    //设置粗体
    label.font = [UIFont boldSystemFontOfSize:20];
    
    //设置斜体（不支持中文）
    label.font = [UIFont italicSystemFontOfSize:20];
    
    //获取所有字体
    NSLog(@"%@",[UIFont familyNames]);
   
    //设置字体，大小
    label.font = [UIFont fontWithName:@"Thonburi" size:20];
    
    //自适应宽度
    //label.adjustsFontSizeToFitWidth = YES;
    //内容对其方式
    label.textAlignment = NSTextAlignmentLeft;
    
    //label.textAlignment = NSTextAlignmentRight;
    //label.textAlignment = NSTextAlignmentCenter;
    
    //限制设置行数，如果文字不够，能显示多少行就显示多少行。
    //如果行高不够，能显示多少行就显示多少行。
    //默认值是0，表示行数最大
    label.numberOfLines = 0;
    
    label.lineBreakMode = NSLineBreakByTruncatingMiddle;
//    NSLineBreakByWordWrapping = 0,  根据单词截断
//    NSLineBreakByCharWrapping,      根据字符截断
//    NSLineBreakByClipping,          简单截断
//    NSLineBreakByTruncatingHead,    省略号在前
//    NSLineBreakByTruncatingTail,    省略号在后
//    NSLineBreakByTruncatingMiddle   省略号在中
    
    label.shadowColor = [UIColor blueColor];
    label.shadowOffset = CGSizeMake(3, 3);
    //设置透明度
    label.alpha = 0.8;
    //标识
    label.tag = 10;
    
    [self.view addSubview:label];
    
}