ios - UIScrollView 从底 View 开始

Question

我是 IOS 程序的新手。

我有 UIscrollview 和 2 个垂直 View ，希望页面在第二个/底部 View 上自动加载并向上滚动

这是我的 UIScrollView 代码:

// Set up ScrollView

    UIScrollView *scrollview = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];

    NSInteger numberOfViews = 2;
    for (int i = 0; i < numberOfViews; i++) {
        CGFloat y = i * self.view.frame.size.height;
        UIView *pageView = [[UIView alloc] initWithFrame:CGRectMake(0, y, self.view.frame.size.width, self.view.frame.size.height)];
        [scrollview addSubview:pageView];

    scrollview.contentSize = CGSizeMake(self.view.frame.size.width, self.view.frame.size.height *numberOfViews);
    scrollview.bounces = NO;

    [self.view addSubview:scrollview];

Answer 1

在 viewDidLoad 中使用它:

- (void)viewDidLoad {
    [super viewDidLoad];    

    CGPoint contentOffset = CGPointMake(0, self.view.frame.size.height);
    scrollView.contentOffset = contentOffset;
}

在 viewDidAppear 中:

- (void)viewDidAppear:(BOOL)animated {
    [super viewWillAppear:animated];

    CGPoint contentOffset = CGPointZero;
    [scrollView setContentOffset:contentOffset animated:true];
}