轮播图L

判断是不是第一次打开如果是就走轮播图 如果不是就不走轮播图

标签控制器继承

ViewController *theVc = [[ViewController alloc]init];

self.window.rootViewController = theVc;

self.window.backgroundColor = [UIColor whiteColor];

<UIScrollViewDelegate>

{

//创建滑动控件

UIScrollView *theScroll;

//分页控件

UIPageControl *thePage;

//创建整型类

NSInteger tegPageTime;

//创建数组;

NSArray *theArray;

//计数器

NSTimer *theTime;

}

//===========

//获取屏幕的宽

float width = self.view.frame.size.width;

//获取屏幕的高

float height = self.view.frame.size.height;

//代替 初始化滚动控件

theScroll = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, width, height)];

//获取屏幕X轴

float X = 0.0;

//一共四张图片

for (int i = 0; i < 4; i++)

{

//图片初始化

UIImageView *theImg = [[UIImageView alloc] initWithFrame:CGRectMake(X, 0, width, height)];

//将图片添加到视图里

theArray = @[[UIImage imageNamed:@"1"],[UIImage imageNamed:@"1"],[UIImage imageNamed:@"1"],[UIImage imageNamed:@"1"],];

//将图片与数组下标绑定

theImg.image = theArray[i];

//将图片添加到滚动视图中

[theScroll addSubview:theImg];

//设置滚动视图的坐标 原代码

//(width=self.view.frame.size.width+self.view.frame.size.width+self.view.frame.size.width+self.view.frame.size.width,)

X += width;

}

//设置滚动视图的大小

theScroll.contentSize = CGSizeMake(width * 4, height);

// 设置滚动视图按页滚动

theScroll.pagingEnabled = YES;

//滚动条隐藏

theScroll.showsHorizontalScrollIndicator = NO;

//设置代理

theScroll.delegate = self;

//初始化页码

thePage = [[UIPageControl alloc]initWithFrame:CGRectMake(width /2-50, 570, 100, 30)];

//页数

thePage.numberOfPages = 4;

//初始页第一页

thePage.currentPage = 0;

//清除原来颜色

thePage.backgroundColor = [UIColor clearColor];

//没动原来

thePage.pageIndicatorTintColor = [UIColor greenColor];

//当前翻页显示的颜色

thePage.currentPageIndicatorTintColor = [UIColor redColor];

//顺序不能乱

[self.view addSubview:theScroll];

[self.view addSubview:thePage];

//记录当前图片

tegPageTime = thePage.currentPage;

//第一个几秒钟换一下 事件

theTime = [NSTimer scheduledTimerWithTimeInterval:3 target:self selector:@selector(scroll) userInfo:nil repeats:YES];

///===========

//事件

-(void)scroll

{

tegPageTime ++;

if (tegPageTime>=theArray.count)

{

tegPageTime = 0;

}

[theScroll setContentOffset:CGPointMake(tegPageTime*theScroll.frame.size.width, 0) animated:YES];

}

//表示在滑动滚动视图的时候调用此方法

- (void)scrollViewDidScroll:(UIScrollView *)scrollView

{

CGPoint point=scrollView.contentOffset;//偏移

//获得所在位置

thePage.currentPage=point.x / scrollView.frame.size.width;

UIButton *theBtn = [[UIButton alloc]init];

if (thePage.currentPage == 3)

{

//停止图片滚动

[theTime setFireDate:[NSDate distantFuture]];

theBtn.frame = CGRectMake(160, 607, 100, 40);

//设置按钮背景颜色

theBtn.backgroundColor = [UIColor blueColor];

//设置按钮为圆角

theBtn.layer.cornerRadius = 8;

//添加按钮文字

[theBtn setTitle:@"立即登录" forState:UIControlStateNormal];

//添加按钮触发事件：必须要用（UIControlEventTouchUpInside）

[theBtn addTarget:self action:@selector(click) forControlEvents:UIControlEventTouchUpInside];

[self.view addSubview:theBtn];

//设置与用户无法交互（这样即可解决按钮在前面的那页中显示）

//  scrollView.userInteractionEnabled = NO;

}

}

//实现页码和滚动视图的关联

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{

thePage.currentPage = theScroll.contentOffset.x / self.view.frame.size.width;

}

-(void)click

{

oneViewController *VC = [[oneViewController alloc]init];

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

}