我已经对UITableViews进行了几次编程。我真的看不到我在做什么。我正在向视图添加UILabels，但我认为它们的添加是相对于默认UITableView单元格大小的大小。当我省略heightForRowAt时，视图的顶部和底部文本大约在单元格的顶部和底部，因此我认为heightForRowAt函数正在发生某些事情，并且高度没有传递给我的子类。另外，我将文本对齐方式设置为在右侧标签的右边，这也不起作用。
Here is what my table looks like
When I don't implement heightForRowAt
我还将在这里发布重要的类型代码。也许有一个我没有看到的问题。
override init(frame: CGRect) {
super.init(frame:frame)
let tblViewFrame = CGRect(x: 0, y: 0, width: frame.width, height: frame.height)
tableView = UITableView(frame: tblViewFrame, style: .plain)
tableView.delegate = self
tableView.dataSource = self
tableView.register(FeedViewCell.self, forCellReuseIdentifier: feedCellID)
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) ->
UITableViewCell {
return tableView.dequeueReusableCell(withIdentifier: feedCellID, for: indexPath)
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
//not going to be this big, just for testing
return CGFloat(100)
}
我也很确定我的CGRect数学是正确的，因为我以多种方式重做了它，但是它从来没有用过。对于UITableViewCell，我添加了一个UIView作为其内部包含所有文本的子视图。任何帮助将不胜感激
import Foundation
import UIKit
class FeedViewCell:UITableViewCell {
var titleLabel:UILabel!
var subtitleLabel:UILabel!
var topRightLabel:UILabel!
var bottomRightLabel:UILabel!
var innerView:UIView!
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style:style, reuseIdentifier:reuseIdentifier)
formatCell()
}
func formatCell() {
backgroundColor = colorSet.sideViewBackgroundColor
createLabels()
formatLabels()
print(frame.height)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func formatLabels() {
//titleLabel
titleLabel.text = "Top Left"
titleLabel.font = fontSet.feedViewTitleFont
//subtitleLabel
subtitleLabel.text = "Bottom Left"
//topRightLabel
topRightLabel.text = "Top Right"
topRightLabel.textAlignment = .right
//bottomRightLabel
bottomRightLabel.text = "Bot Right"
bottomRightLabel.textAlignment = .right
}
func createLabels() {
//Space so stuff doesn't touch edges
let bufferSpace = CGFloat(0)
let horDelim = self.frame.width * CGFloat(0.75)
let verDelim = self.frame.height * CGFloat(0.5)
let tlRect = CGRect(x: bufferSpace, y: bufferSpace, width: horDelim - bufferSpace, height: verDelim - bufferSpace)
let trRect = CGRect(x: horDelim, y: bufferSpace, width: self.frame.width - horDelim - bufferSpace, height: self.frame.height - verDelim - bufferSpace)
let blRect = CGRect(x: bufferSpace, y: verDelim, width: horDelim - bufferSpace, height: self.frame.height - verDelim - bufferSpace)
let brRect = CGRect(x: horDelim, y: verDelim, width: self.frame.width - horDelim - bufferSpace, height: self.frame.height - verDelim - bufferSpace)
innerView = UIView(frame: CGRect(x: 0, y: 0, width: frame.width, height: frame.height))
titleLabel = UILabel(frame: tlRect)
subtitleLabel = UILabel(frame: blRect)
topRightLabel = UILabel(frame: trRect)
bottomRightLabel = UILabel(frame: brRect)
innerView.addSubview(titleLabel)
innerView.addSubview(subtitleLabel)
innerView.addSubview(topRightLabel)
innerView.addSubview(bottomRightLabel)
addSubview(innerView)
}
}
答案 0 :(得分：0)
下面是你会如何手动摆出细胞的例子。对于每个内容视图，您需要确定内容的高度和宽度，并计算它们相对于单元格中其他项目的对齐方式。这是一个简单的示例，因为标签不是多行的，我只是随意地使每个内容视图的宽度为单元格宽度的一半。
您还需要在heightForRowAtIndexPath中设置单元格的大小。在过去的自动布局之前，收集意见的工作，我用了一个尺寸小区（小区的静态实例），在那里我可以通过在细胞中的内容，然后获得基于它会显示内容的单元格高度。
import UIKit
class FeedViewCell:UITableViewCell {
var titleLabel:UILabel!
var subtitleLabel:UILabel!
var topRightLabel:UILabel!
var bottomRightLabel:UILabel!
var innerView:UIView!
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style:style, reuseIdentifier:reuseIdentifier)
formatCell()
}
func formatCell() {
createLabels()
formatLabels()
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func formatLabels() {
//titleLabel
titleLabel.text = "Top Left"
titleLabel.font = UIFont.systemFont(ofSize: 20.0)
titleLabel.backgroundColor = .cyan
//subtitleLabel
subtitleLabel.text = "Bottom Left"
subtitleLabel.font = UIFont.systemFont(ofSize: 15.0)
subtitleLabel.backgroundColor = .orange
//topRightLabel
topRightLabel.text = "Top Right"
topRightLabel.font = UIFont.systemFont(ofSize: 20.0)
topRightLabel.textAlignment = .right
topRightLabel.backgroundColor = .yellow
//bottomRightLabel
bottomRightLabel.text = "Bottom Right"
bottomRightLabel.font = UIFont.systemFont(ofSize: 15.0)
bottomRightLabel.textAlignment = .right
bottomRightLabel.backgroundColor = .green
}
func createLabels() {
//Space so stuff doesn't touch edges
titleLabel = UILabel(frame: .zero)
subtitleLabel = UILabel(frame: .zero)
topRightLabel = UILabel(frame: .zero)
bottomRightLabel = UILabel(frame: .zero)
contentView.addSubview(titleLabel)
contentView.addSubview(subtitleLabel)
contentView.addSubview(topRightLabel)
contentView.addSubview(bottomRightLabel)
}
override func layoutSubviews() {
super.layoutSubviews()
/* title label */
let marginSpacing:CGFloat = 5
let itemSpacing:CGFloat = 5
var width = frame.width * 0.5
var height = calculateTextHeight(width: width, text: titleLabel.text!, attributes: [NSAttributedString.Key.font: titleLabel.font!])
let titleRect = CGRect(x: marginSpacing, y: 8, width: width, height: height)
/* subtitle label */
width = titleRect.width
height = calculateTextHeight(width: width, text: subtitleLabel.text!, attributes: [NSAttributedString.Key.font: subtitleLabel.font!])
let subtitleRect = CGRect(x: marginSpacing, y: titleRect.maxY + itemSpacing, width: width , height: height)
/* top right label */
width = frame.width - titleRect.width - marginSpacing
height = calculateTextHeight(width: width, text: topRightLabel.text!, attributes: [NSAttributedString.Key.font: topRightLabel.font!])
let topRightRect = CGRect(x: titleRect.width, y: titleRect.origin.y, width: width, height: height)
/* bottom right label */
width = frame.width - subtitleRect.width - marginSpacing
height = calculateTextHeight(width: width, text: bottomRightLabel.text!, attributes: [NSAttributedString.Key.font: bottomRightLabel.font!])
let bottomRightRect = CGRect(x: subtitleRect.width, y: topRightRect.maxY + itemSpacing, width: width, height: height)
titleLabel.frame = titleRect
subtitleLabel.frame = subtitleRect
topRightLabel.frame = topRightRect
bottomRightLabel.frame = bottomRightRect
print("maxY", bottomRightLabel.frame.maxY)
}
func calculateTextHeight(width:CGFloat, text:String, attributes:[NSAttributedString.Key:UIFont]) -> CGFloat {
let size = CGSize(width: width, height: CGFloat.greatestFiniteMagnitude)
let labelRect = text.boundingRect(with: size, options:[.usesLineFragmentOrigin, .usesFontLeading], attributes:attributes, context: nil)
let height = ceil(labelRect.height)
return height
}
override var intrinsicContentSize: CGSize {
return CGSize(width: frame.width, height: frame.height)
}
}