用UIScroView实现图片的滚动

来源：互联网发布：第四章 sql查询语言编辑：程序博客网时间：2024/05/16 07:32

主要分为两步：1. 创建UIScrollView 2.创建UIPageControl。最后别忘了实现UIScrollViewDelegate

- (void)setupScrollView

{

//创建UIScrollView

UIScrollView *scorllView = [[UIScrollView alloc] init];

scorllView.frame = self.view.bounds;

[self.view addSubview:scorllView];

scorllView.delegate = self;

//添加图片

CGFloat width = scorllView.width;

CGFloat height = scorllView.height;

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

{

// 拼接图片名称

NSString *name = [NSString stringWithFormat:@"new_feature_%d", i+1];

UIImage *image = [UIImage imageWithName:name];

// 创建UIImageView

UIImageView *iv = [[UIImageView alloc] init];

iv.image = image;

// 设置frame

iv.width = width;

iv.height = height;

iv.y = 0;

iv.x = i * iv.width;

// 添加UIImageView到scrollerView

[scorllView addSubview:iv];

}

// 设置UISrollView的其他属性

// 设置contentsize

scorllView.contentSize = CGSizeMake(WZNewfeatureImageCount * width, 0);

// 设置分页

scorllView.pagingEnabled = YES;

// 隐藏指示条

scorllView.showsHorizontalScrollIndicator = NO;

// 设置没有弹簧效果

scorllView.bounces = NO;

}

- (void)setupPageControl

{

//创建UIPageControl

UIPageControl *control = [[UIPageControl alloc] init];

control.numberOfPages = WZNewfeatureImageCount;

//设置UIPageControl的frame

control.centerX = self.view.width * 0.5;

control.centerY = self.view.height - 30;

//设置当前页的颜色

control.currentPageIndicatorTintColor = [UIColor redColor];

//设置其他也的颜色

control.pageIndicatorTintColor = [UIColor greenColor];

//添加UIPageControl到控制器的View

[self.view addSubview:control];

self.control = control;

}

#pragma mark - UIScrollViewDelegate

- (void)scrollViewDidScroll:(UIScrollView *)scrollView

{

// 1.计算页码

int page = scrollView.contentOffset.x / self.view.width;

// 2.设置页码

self.control.currentPage = page;

}

PS:模拟器上没 home键，怎么返回的

shift+cmd+h

0 0