一.轮播图(自己写的,需要手动点击,可作引导页)

完整实例代码:

 

@interface NewfeatureViewController ()
     
      //声明一个UIScrollView的属性@property(nonatomic,strong)UIScrollView *scrollView;//声明一个可变数组@property(nonatomic,strong)NSMutableArray *imageArray;//声明一个UIPageControl 的属性@property(nonatomic,strong)UIPageControl *pageControl;@end/*  轮播图的实现  */@implementation NewfeatureViewController- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view.        /**这里的执行顺序不能乱 */   [self loadScrollView];    [self loadImageView];    [self loadPageControl];      }-(void)loadScrollView{    //初始化一个UIScrollView    self.scrollView = [[UIScrollView alloc] initWithFrame:self.view.frame];    //是否整屏翻滚    self.scrollView.pagingEnabled = YES;    //设置边框是否回弹    self.scrollView.bounces = NO;    //设置背景色   self.scrollView.backgroundColor = [UIColor orangeColor];    //设置代理人    self.scrollView.delegate = self;    //添加在view上    [self.view addSubview:self.scrollView];}-(void)loadImageView{    self.imageArray = [NSMutableArray array];    for (int i = 0; i<4; i++) {        //取出图片名字放假呢imageStr中        NSString *imageStr =[NSString stringWithFormat:@"new_feature_%d",i+1];        //根据imageStr , 初始化一个UIImage类型的对象        UIImage *myImage = [UIImage imageNamed:imageStr];        //定义UIImageView   通过循环变量控制图片位置        UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(i*self.view.frame.size.width, 0, self.view.frame.size.width, self.view.frame.size.height)];        imageView.image = myImage;        //把imageview 添加进scrollview中进行显示  subView是一个数组存的是view所有的子视图        [self.scrollView addSubview:imageView];        //把图片添加进定义的可变数组中        [self.imageArray addObject:imageView];                //如果是最后一个imageView 就往里面添加其他内容        if (self.imageArray.count == 4) {            [self setupLastImageView:imageView];        }                    }    //要在确保有数据之后  在设置contentSize    self.scrollView.contentSize = CGSizeMake(self.view.frame.size.width * self.imageArray.count, self.view.frame.size.height);}-(void)loadPageControl{    //UIPageControl 的初始化    self.pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(0, self.view.frame.size.height - 40, self.view.frame.size.width, 40)];    //指定页面的个数    self.pageControl.numberOfPages = 4;    //指定当前页    self.pageControl.currentPage = 0;        [self.view addSubview:self.pageControl];    //设置背景色    self.pageControl.backgroundColor =[[UIColor blackColor]colorWithAlphaComponent:0.3];    //UIPageControl 的addTarget/action事件    [self.pageControl addTarget:self action:@selector(pageAction)  forControlEvents:UIControlEventTouchUpInside];}-(void)pageAction{    //通过pageControl 当前页乘以宽度 计算出当前的偏移量,从而通过偏移量的变化是实现相片的变化    [self.scrollView setContentOffset:CGPointMake(self.pageControl.currentPage * self.view.frame.size.width, 0) animated:YES];    //打印偏移量的方法  (注意上面的动画效果对于偏移量造成一定的延迟,偏移量是在动画效果结束之后才最终确定下来,而打印事件是在setPointoffset(设置偏移量)时就打印的)    NSLog(@"pagecontrol = %@",NSStringFromCGPoint(self.scrollView.contentOffset));}-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{   //利用偏移量计算当前是第几张图片    NSInteger index = self.scrollView.contentOffset.x/self.view.frame.size.width;    //然后将计算出的第几张图片的下标赋给cuuentPage,从而实现图片切换    self.pageControl.currentPage = index;    //打印偏移量的方法    NSLog(@"%@",NSStringFromCGPoint(self.scrollView.contentOffset));}-(void)setupLastImageView:(UIImageView *)imageView{    //开启用户交互功能    imageView.userInteractionEnabled = YES;    //1.分享给大家    UIButton *shareBtn = [[UIButton alloc]initWithFrame:CGRectMake(90, 400, 200, 40)];    //设置图片    [shareBtn setImage:[UIImage imageNamed:@"new_feature_share_false"] forState:UIControlStateNormal];    [shareBtn setImage:[UIImage imageNamed:@"new_feature_share_true"]        forState:UIControlStateSelected];    //设置文字    [shareBtn setTitle:@"分享给大家" forState:UIControlStateNormal];    [shareBtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];    shareBtn.titleLabel.font = [UIFont systemFontOfSize:16];    [shareBtn addTarget:self action:@selector(shareClick:) forControlEvents:UIControlEventTouchUpInside];    //调整内边距    shareBtn.titleEdgeInsets = UIEdgeInsetsMake(0, 10, 0, 0);    [imageView addSubview:shareBtn];    //2.开始微博    UIButton *startBtn = [[UIButton alloc] initWithFrame:CGRectMake(115, 480, 150, 40)];    [startBtn setBackgroundImage:[UIImage imageNamed:@"new_feature_finish_button"] forState:UIControlStateNormal];    [startBtn setBackgroundImage:[UIImage imageNamed:@"new_feature_finish_button_highlighted"] forState:UIControlStateSelected];    [startBtn setTitle:@"开始微博" forState:UIControlStateNormal];    [startBtn addTarget:self action:@selector(startClick) forControlEvents:UIControlEventTouchUpInside];    [imageView addSubview:startBtn];    }-(void)shareClick:(UIButton *)shareBtn{  //状态取反    shareBtn.selected = !shareBtn.isSelected;}//开始微博按钮的设置-(void)startClick{    //切换到TabBarVieewController    /*     切换控制器的方法     1.push 依赖于UInavigationController 控制器的切换是可逆的       2.modal 模态推出     2.切换window的rootViewController     */    //这是模态推出视图的方法//   TabBarViewController *main = [[TabBarViewController alloc] init];//    [self presentViewController:main animated:YES completion:nil];        UIWindow *window = [UIApplication sharedApplication].keyWindow;    window.rootViewController = [[TabBarViewController alloc] init];}