Question

我有一个像这样的可设计视图（称为 ReviewItem ）。它的工作非常完美。

override init(frame: CGRect) {
    super.init(frame: frame)
    setupUI()
}

required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
    setupUI()
}

override func layoutSubviews() {
    super.layoutSubviews()

    let contentFrame = bounds
    let imagePositionX = (contentFrame.width - imageSize.width) / 2
    normalImageView.frame = CGRect(origin: CGPoint(x: imagePositionX, y: padding), size: imageSize)
    let labelPositionY = imageSize.height + padding*2
    textLabel.frame = CGRect(x: 0, y: labelPositionY, width: contentFrame.width, height: contentFrame.height - labelPositionY)
}

func setupUI() {
    let _normalImageView = UIImageView()
    addSubview(_normalImageView)
    normalImageView = _normalImageView

    let _textLabel = UILabel()
    addSubview(_textLabel)
    textLabel = _textLabel
}

但是现在我想创建一个新的 ReviewBar ，它包含许多 ReviewItem 元素。代码如下：

override func layoutSubviews() {
    super.layoutSubviews()

    let contentFrame = bounds

    let itemWidth = contentFrame.width / CGFloat(itemsNumber)

    for i in 0..<itemsNumber {
        let frame = CGRect(x: itemWidth*CGFloat(i), y: 0, width: itemWidth, height: contentFrame.height)
        let item = reviewItems[i]
        item.frame = frame
    }
}

func setupUI() {
    removeAllItems()       //remove all subviews
    reviewItems.removeAll()
    for i in 0..<itemsNumber {
        let item = ReviewBarItem(frame: .zero)
        addSubview(item)
        reviewItems.append(item)
    }
}

ReviewBar 未在情节提要上显示并出现错误。但是，当我为它的属性设置值并在模拟器上运行时，它会根据需要显示。我想 ReviewBar 可以在故事板上显示，我该怎么做？感谢

IB Designables: Failed to render and update auto layout status for CustomViewDemoVC (4Tk-Ic-u7T): The agent crashed

IB可设计：无法在Designable

0 个答案: