我有一个显示业务信息的UICollectionViewController头部单元格。
一个业务可能有也可能没有描述。
在我的头部单元格中，我设置了一个业务对象，然后设置所有标签等的文本。在这里，我还尝试根据此文章计算所需的文本字段高度。
我需要在实际使用它的UICollectionViewController中动态设置我的头部单元格的高度。
BusinessDetailHeader类：
var maxTextViewHeight: CGFloat = 0
var business: Business? {
didSet {
guard let imageUrl = business?.logoUrl else {return}
let url = URL(string: imageUrl)
logoView.kf.setImage(with: url)
headerImageView.kf.setImage(with: url)
guard let businessName = business?.name else {return}
guard let address = business?.address else {return}
guard let hoursOfOperation = business?.hoursOfOperation else {return}
guard let phoneNumber = business?.phoneNumber else {return}
businessNameLabel.text = businessName
addressLabel.text = address
hoursofOperationLabel.text = hoursOfOperation
phoneNumberLabel.text = phoneNumber
if let description = business?.description {
detailsTextField.text = description
let amountOfLinesToBeShown:CGFloat = 6
if let height = detailsTextField.font?.lineHeight {
maxTextViewHeight = height * amountOfLinesToBeShown
}
}
}
}
override init(frame: CGRect) {
super.init(frame: frame)
layoutViews()
}
fileprivate func layoutViews() {
addSubview(headerImageView)
headerImageView.anchor(top: topAnchor, left: leftAnchor, bottom: nil, right: rightAnchor, paddingTop: 0, paddingLeft: 0, paddingBottom: 0, paddingRight: 0, width: 0, height: 130)
//ADJUST DETAIL HEIGHT HERE BASED ON CALCULATED HEIGHT FOR TEXTVIEW
addSubview(detailView)
detailView.anchor(top: headerImageView.bottomAnchor, left: leftAnchor, bottom: nil, right: rightAnchor, paddingTop: 0, paddingLeft: 0, paddingBottom: 0, paddingRight: 0, width: 0, height: 200+maxTextViewHeight)
detailView.addSubview(businessNameLabel)
businessNameLabel.anchor(top: logoView.bottomAnchor, left: nil, bottom: nil, right: nil, paddingTop: 4, paddingLeft: 0, paddingBottom: 0, paddingRight: 0, width: 0, height: 0)
businessNameLabel.centerXAnchor.constraint(equalTo: detailView.centerXAnchor).isActive = true
detailView.addSubview(detailsTextField)
detailsTextField.anchor(top: businessNameLabel.bottomAnchor, left: leftAnchor, bottom: nil, right: rightAnchor, paddingTop: 0, paddingLeft: 0, paddingBottom: 0, paddingRight: 0, width: 0, height: maxTextViewHeight)
detailView.addSubview(addressLabel)
addressLabel.anchor(top: detailsTextField.bottomAnchor, left: nil, bottom: nil, right: nil, paddingTop: 4, paddingLeft: 0, paddingBottom: 0, paddingRight: 0, width: 0, height: 0)
addressLabel.centerXAnchor.constraint(equalTo: detailView.centerXAnchor).isActive = true
detailView.addSubview(hoursofOperationLabel)
hoursofOperationLabel.anchor(top: addressLabel.bottomAnchor, left: nil, bottom: nil, right: nil, paddingTop: 4, paddingLeft: 0, paddingBottom: 0, paddingRight: 0, width: 0, height: 0)
hoursofOperationLabel.centerXAnchor.constraint(equalTo: detailView.centerXAnchor).isActive = true
detailView.addSubview(phoneNumberLabel)
phoneNumberLabel.anchor(top: hoursofOperationLabel.bottomAnchor, left: nil, bottom: nil, right: nil, paddingTop: 4, paddingLeft: 0, paddingBottom: 0, paddingRight: 0, width: 0, height: 0)
phoneNumberLabel.centerXAnchor.constraint(equalTo: detailView.centerXAnchor).isActive = true
}
高度更新正常，没有问题，但有时当高度太大时，文本和所有后续元素会溢出标题单元格。我认为这与我在UICollecitonViewController中处理单元格高度的方式有关。
我是这样设置它的高度的：
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize {
return CGSize(width: view.frame.width, height: 330)
}
这里的330高度需要是动态的。这可能吗？我应该像这样设置高度属性吗？我看到过像这个帖子一样试图解决这个问题，但解决方案似乎不是最好的。