UIscrollview不滾動迅速

Question

我有以下問題，我在view2上方創建了view1

然后將scrollview添加到view1，scrollview包含一些通過代碼添加的ui元素

我的滾動視圖無法滾動，並且它的內容出現在視圖2上方的問題，而我需要它在它的后面並能夠滾動它

屏幕截圖如下

我添加UI元素的代碼如下

        mainScrollView = UIScrollView(frame: CGRectMake(0, 0, self.view.frame.size.width, 1000))

        let awesomeView2: UIImageView = UIImageView(frame: CGRectMake(0, 0, self.view.frame.size.width, 180))
        awesomeView2.load(selectedItem.listingImage);

        mainScrollView.addSubview(awesomeView2);

        let title: UILabel = UILabel(frame: CGRectMake(0, 180, self.view.frame.size.width, 44));
        title.text = selectedItem.listingTitle;
        title.textAlignment = .Right;

        mainScrollView.addSubview(title);

        let catName: UILabel = UILabel(frame: CGRectMake(200, 224, 120, 21));
        catName.text = selectedItem.catName
        catName.textAlignment = .Right;

        mainScrollView.addSubview(catName);

        let datePublished: UILabel = UILabel(frame: CGRectMake(0, 224, 200, 21));
        datePublished.text = selectedItem.dateCreated
        datePublished.textAlignment = .Left

        mainScrollView.addSubview(datePublished);

        let grayColor = UIColor(red: 1, green: 165/255, blue: 0, alpha: 1)
        let iconsView: UIView = UIView(frame: CGRectMake(0, 250, self.view.frame.size.width, 32));
        iconsView.backgroundColor = grayColor
        mainScrollView.addSubview(iconsView);

        if (KhawaterDataManager.instance.banners.itemBanners.count > 0) {

            let awesomeView3: UIImageView = UIImageView(frame: CGRectMake(0, 282, self.view.frame.size.width, 50))
            awesomeView3.load(KhawaterDataManager.instance.banners.itemBanners[0].image);
            mainScrollView.addSubview(awesomeView3);
        }


        // test

        let catName1: UILabel = UILabel(frame: CGRectMake(0, 335, self.view.frame.size.width, 50));
        catName1.text = selectedItem.catName

        mainScrollView.addSubview(catName1);

        let catName2: UILabel = UILabel(frame: CGRectMake(0, 385, self.view.frame.size.width, 50));
        catName2.text = selectedItem.catName
        mainScrollView.addSubview(catName2);


        let catName3: UILabel = UILabel(frame: CGRectMake(0, 435, self.view.frame.size.width, 50));
        catName3.text = selectedItem.catName
        mainScrollView.addSubview(catName3);

        mainScrollView.contentSize = CGSizeMake(self.view.frame.size.width, 1000)
        mainScrollView.scrollEnabled = true;

        mainView.addSubview(mainScrollView);

請任何人告訴我這里是什么問題？

Answer 1

請檢查此行

mainScrollView.contentSize = CGSizeMake(self.view.frame.size.width, 1000)

為什么內容高度為1000。這太多了。 這應該是

mainScrollView.contentSize = CGSizeMake(self.view.frame.size.width, 435+50)

而另一個問題是，為什么設置你的scollView為副視點mainView而不是self.view 。

Answer 2

另外，您可能想將所有子視圖（awesomeView2，title，catName等）添加到容器視圖，然后將容器視圖添加到滾動視圖。 就像是：

let containerView: UIView = {
    let view = UIView()
    view.addSubview(self.awesomeView2)
    view.addSubview(self.title)
    view.addSubview(self.catName)
    view.addSubview(self.datePublished)
    return view
}()

mainScrollView.addSubview(containerView)