UIScrollView基础

- (void)viewDidLoad {
    [super viewDidLoad];
    //滚动视图，可以对屏幕内容进行滚屏查看。
    
    UIScrollView* sv = [[UIScrollView alloc]init];
    
    sv.frame = CGRectMake(0, 0, 320, 576);
    //设置背景颜色
    sv.backgroundColor = [UIColor orangeColor];
    
    //设置画布的大小，画布显示在滚动视图内部，一般大于frame的大小。
    sv.contentSize = CGSizeMake(320,576*5);
    // 是否按照整页来滚动
    sv.pagingEnabled = YES;
    // 是否可以开启滚动效果
    sv.scrollEnabled = YES;
    
    //是否可以边缘弹动效果
    sv.bounces = YES;
    //开启横向弹动效果
    sv.alwaysBounceHorizontal = YES;
    //开启纵向弹动效果
    sv.alwaysBounceVertical = YES;
    //显示横向滚动条
    sv.showsHorizontalScrollIndicator = YES;
    //显示纵向滚动条
    sv.showsVerticalScrollIndicator = YES;
    
    for(int i=0;i<2;i++)
    {
        NSString* strName = [NSString stringWithFormat:@"%d.jpg",i+1];
        UIImage* image = [UIImage imageNamed:strName];
        
        UIImageView* iView =  [[UIImageView alloc] initWithImage:image];
      
        iView.frame = CGRectMake(0, 576*i, 320, 576);
        
        [sv addSubview:iView];
        
    }
    
    [self.view addSubview:sv];
    
}