ios - 如何禁用 UIScrollView 的垂直滚动？

Question

问题

http://im2.ezgif.com/tmp/ezgif-2269702568.gif

我已将 contentSize 设置为我想要的高度。但是，我的 ScrollView 仍然有垂直滚动。事实上，有很多空白区域，我不确定为什么。

我不确定是否是因为我这样做:contentOffset = CGPoint(x:0, y: self.frame.minY)。但我这样做的原因是，当我将按钮放在 ScrollView 中时，我必须向下滚动才能看到它们。 contentOffset 允许按钮在加载时位于 ScrollView 上。

如果有人可以禁用垂直滚动，同时仍然显示按钮，那就太好了!

代码

在我的 View Controller 中，我设置了自定义 ScrollView :

class ScheduleViewController: UIViewController {
    private var scheduleBar: ScheduleBar!
    private let barHeight: CGFloat = 55
    override func viewDidLoad() {
        super.viewDidLoad()
        scheduleBar = ScheduleBar(frame: CGRect(x: 0, y: (self.navigationController?.navigationBar.frame.maxY)!, width: self.view.bounds.width, height: barHeight))
        scheduleBar.setUp(buttonsData: times, selected: 2)
        self.view.addSubview(scheduleBar)
   }
}

在自定义 ScrollView 中，我进一步设置了 ScrollView :

class ScheduleBar: UIScrollView {
    private var buttons: [UIButton]!
    private var bar: UIView!
    private var buttonWidth: CGFloat!
    private var buttonPadding: CGFloat = 20

func setUp(buttonsData: [String], selected: Int){
        self.backgroundColor = UIColor.white

        buttons = []
        for time in buttonsData{
            let button = UIButton(frame: CGRect(x: 0, y: 0, width: 50, height: self.bounds.height))
            button.setTitle(time, for: UIControlState.normal)
            button.setTitleColor(Color.black, for: UIControlState.normal)
            button.titleLabel?.font = UIFont(name: "HelveticaNeue-Medium", size: 13.0)
            button.sizeToFit()
            buttonWidth = button.bounds.width + buttonPadding
            buttons.append(button)
        }
        for i in 0...(buttons.count-1){
            if i == 0 {
                buttons[i].frame = buttons[i].frame.offsetBy(dx:buttonPadding/2, dy: 0)
            }else if i == buttons.count-1{
               buttons[i].frame = buttons[i].frame.offsetBy(dx: CGFloat(i) * buttonWidth + buttonPadding/2, dy: 0)
            }
            else{
              buttons[i].frame = buttons[i].frame.offsetBy(dx: CGFloat(i) * buttonWidth + buttonPadding, dy: 0)
            }
            buttons[i].center.y = (self.bounds.height/2)
            addSubview(buttons[i])
        }

        bar = UIView(frame: CGRect(x: 0, y: self.bounds.height - 3.0, width: buttons[0].bounds.width + buttonPadding, height: 3.0))
        bar.backgroundColor = Color.red
        select(index: selected, animation: false)
        addSubview(bar)

        self.contentSize = CGSize(width: CGFloat(buttons.count) * buttonWidth + buttonPadding, height: self.bounds.height)
        //reset origin of scrollview
        self.contentOffset = CGPoint(x:0, y: self.frame.minY)
    }

    func select(index: Int, animation: Bool){
        func select() -> Void{
            if index == 0{
                bar.frame.origin.x = CGFloat(0)
            }else{
                bar.frame.origin.x = buttons[index].frame.minX - buttonPadding/2
            }
        }
        if animation {
            UIView.animate(withDuration: 0.7, animations: {select()})
        }else{
            select()
        }
        scrollRectToVisible(CGRect(x: buttons[index].frame.minX, y: self.frame.minY, width: buttons[index].bounds.width, height: buttons[index].bounds.height), animated: true)
    }

Answer 1

尝试将 contentSize 的高度设置为 ScrollView 的高度。然后应该禁用垂直滚动，因为没有任何东西可以垂直滚动。

scrollView.contentSize = CGSizeMake(scrollView.contentSize.width,scrollView.frame.size.height);