IOS学习之——欢迎界面

来源：互联网发布：英语短语软件知乎编辑：程序博客网时间：2024/06/05 05:45
////  MyViewController.m//#import "MyViewController.h"@interface MyViewController () <UIScrollViewDelegate>@property(nonatomic,strong)UIScrollView *sv;@property(nonatomic,strong)UIPageControl *pc;@end@implementation MyViewController//scrollView的代理方法  已经滑动时调用-(void)scrollViewDidScroll:(UIScrollView *)scrollView {//    round  返回的是参数中浮点数 四舍五入后 的值    //当前在 第几页上    int currentPageNum = round(scrollView.contentOffset.x / scrollView.frame.size.width);    self.pc.currentPage = currentPageNum;}- (void)viewDidLoad {    [super viewDidLoad];    //设置 scrollView相关内容    [self configScrllView];    [self configPageControl];}//设置下面的4个原点-(void)configPageControl {    self.pc = [[UIPageControl alloc]init];    self.pc.frame = CGRectMake(0, self.view.frame.size.height - 60, self.view.frame.size.width, 40);    //有几个点    self.pc.numberOfPages = 4;    //当前 选中的时第几个点  默认不设置是0    self.pc.currentPage = 0;    //每个点的颜色是什么    self.pc.pageIndicatorTintColor = [UIColor redColor];    //当前 选中的 点 颜色是什么    self.pc.currentPageIndicatorTintColor = [UIColor greenColor];    //关闭用户交互    self.pc.userInteractionEnabled = NO;        [self.view addSubview:self.pc];}-(void)configScrllView {    //设置 scrollView 的 可见区域和屏幕一样大    self.sv = [[UIScrollView alloc]initWithFrame:self.view.frame];    self.sv.delegate = self;    //设置内容区域    self.sv.contentSize = CGSizeMake(4 * self.view.frame.size.width, self.view.frame.size.height);    //向scrollView中添加内容    for (int i = 0; i < 4; i++) {        NSString *imageName = [NSString stringWithFormat:@"welcome%d", i + 1];        UIImageView *iv = [[UIImageView alloc]initWithImage:[UIImage imageNamed:imageName]];        iv.frame = CGRectMake(i * self.view.frame.size.width, 0, self.view.frame.size.width, self.view.frame.size.height);        [self.sv addSubview:iv];    }    //设置整页滑动    self.sv.pagingEnabled = YES;    //关闭scrollView 的 弹跳    self.sv.bounces = NO;    //关闭水平的滑动条    self.sv.showsHorizontalScrollIndicator = NO;        [self.view addSubview:self.sv];}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}/*#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {    // Get the new view controller using [segue destinationViewController].    // Pass the selected object to the new view controller.}*/@end
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