Question

我有一个可以容纳20个太阳镜的滚动视图设置，在调用该功能时，它会带来一个新视图，太阳镜2×2，总共20个（其中19和20位于滚动视图的底部）。它在iPhone和iPhone上完美运行iPhone5，但在iPad上，它只有16，如果我尝试进一步拖动，我可以看到剩下的4个太阳镜，但我无法选择它们，因为滚动视图刚刚反弹到它认为是16的“底部”。

这是在iPad Air上，所以我不确定iPad 2是否会出现不同分辨率的问题。

这就是我调用视图的方式;

- (IBAction)glassesClick:(id)sender
{
    [(AppDelegate*)[[UIApplication sharedApplication] delegate] playSoundEffect:1];
    [scroll scrollRectToVisible:CGRectMake(0, 0, 5, 5) animated:NO];

    glassesView.frame = CGRectMake(0, -[[UIScreen mainScreen] bounds].size.height, [[UIScreen mainScreen] bounds].size.width, [[UIScreen mainScreen] bounds].size.height);
    [self.view addSubview:glassesView];

    [UIView animateWithDuration:0.5 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^
     {
         glassesView.frame = CGRectMake(0, 0, [[UIScreen mainScreen] bounds].size.width, [[UIScreen mainScreen] bounds].size.height);
     } completion:nil];
}

滚动容器视图设置;

{
    for(UIView *view in [scroll subviews])
        [view removeFromSuperview];

    scroll.contentSize = CGSizeMake(scroll.frame.size.width, 1760);

    for(int i = 0; i < 20; i++)
    {
        int xCoord = 0;
        if(i % 2 == 0)
            xCoord = 57;
        else
            xCoord = 188;


        UIButton *glasss = [[UIButton alloc] initWithFrame:CGRectMake(xCoord, 20 + i/2 * 150 + i/2 * 20, 75, 150)];

        if(UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
        {
            int xCoord = 0;
            if(i % 2 == 0)
                xCoord = 156;
            else
                xCoord = 462;

            glasss.frame = CGRectMake(xCoord, 20 + i/2 * 300 + i/2 * 20, 150, 300);
            scroll.contentSize = CGSizeMake(scroll.frame.size.width, 2580);
        }

        glasss.tag = i + 1;
        [glasss addTarget:self action:@selector(glassChosen:) forControlEvents:UIControlEventTouchUpInside];
        [glasss setImage:[UIImage imageNamed:[NSString stringWithFormat:@"glass%d.png", i + 1]] forState:UIControlStateNormal];
        [[glasss imageView] setContentMode:UIViewContentModeScaleAspectFit];

        if(i >= 10)
        {
            if([[[NSUserDefaults standardUserDefaults] objectForKey:@"purchased_glasses"] isEqualToString:@"NO"])
            {
                UIImageView *locked = [[UIImageView alloc] initWithFrame:CGRectMake(10, 10, 20, 25)];
                locked.image = [UIImage imageNamed:@"lock_button.png"];
                [glasss addSubview:locked];
                [locked release];

                [glasss removeTarget:self action:@selector(glassChosen:) forControlEvents:UIControlEventTouchUpInside];
                [glasss addTarget:self action:@selector(chooseLockedFlavor) forControlEvents:UIControlEventTouchUpInside];
            }
        }

        UIImageView *backGlass = [[UIImageView alloc] initWithFrame:glasss.frame];
        backGlass.image = [UIImage imageNamed:@"back_glass.png"];
        [backGlass setContentMode:UIViewContentModeScaleAspectFit];
        [scroll addSubview:backGlass];
        [backGlass release];

        [scroll addSubview:glasss];
        [glasss release];
    }
}

Answer 1

在此细分中：

scroll.contentSize = CGSizeMake(scroll.frame.size.width, 1760);

我们发现您明确设置了contentSize的高度。因此，您可能会阻止您的iPad视图。尝试动态设置（或根本不设置它！）。

Answer 2

在scrollView而不是contentSize设置viewDidLayoutSubviews viewDidLoad。

override func viewDidLayoutSubviews() {
        super.viewDidLayoutSubviews()
        scroll.contentSize = CGSize(scroll.frame.size.width, 1760)
    }

UIScrollView不滚动到底部

2 个答案: