Question

我有以下代码。我添加了一个按钮，当我按下它时想要发生一些事情，但它似乎不起作用。在这种情况下，我希望系统打印出来＆＃34; hi＆＃34;并且＆＃34;嘿＆＃34;。我似乎无法弄清问题。任何帮助，将不胜感激。

import UIKit

class ViewController: UIViewController, UIScrollViewDelegate {
    var scrollView: UIScrollView!
    var containerView = UIView()

    override func viewDidLoad() {
        super.viewDidLoad()

        var buttonOne: UIButton!

        buttonOne = UIButton(type: UIButtonType.System)
        buttonOne.setTitle("Level 1", forState: UIControlState.Normal)

        buttonOne.frame = CGRectMake(10, 50, 100, 100)
        buttonOne.backgroundColor = UIColor.blueColor()
        buttonOne.titleLabel?.font = UIFont.systemFontOfSize(17)
        buttonOne.setTitleColor(UIColor.whiteColor(), forState: UIControlState.Normal)
        buttonOne.addTarget(self, action: Selector("clicked:"), forControlEvents: UIControlEvents.TouchUpInside)

        self.scrollView = UIScrollView()
        self.scrollView.delegate = self
        self.scrollView.contentSize = CGSizeMake(0, 1000)

        containerView = UIView()

        scrollView.addSubview(containerView)
        view.addSubview(scrollView)
        containerView.addSubview(buttonOne)
    }

    func clicked(sender: AnyObject){
        NSLog("Hey")
        print("hi")
    }

    override func viewDidLayoutSubviews() {
        super.viewDidLayoutSubviews()

        scrollView.frame = view.bounds
        containerView.frame = CGRectMake(0, 0, scrollView.contentSize.width, scrollView.contentSize.height)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
}

Answer 1

通过将其bounds大小设置为scrollview的contentSize，将containerView的宽度设置为0

self.scrollView.contentSize = CGSizeMake(0, 1000)
那么

 containerView.frame = CGRectMake(0, 0, scrollView.contentSize.width,
                                        scrollView.contentSize.height)

Answer 2

您已将按钮放在滚动视图中。这里，scrollview是按钮的超级视图，scrollview的宽度及其内容大小宽度必须大于或等于要执行操作的按钮宽度。

为什么我无法与我的按钮交互？迅速

2 个答案: