以编程方式（文档）Swift UItableView自定义单元格？ [英] Swift UItableView Custom cell programmatically (documentation)?
问题描述
我一直在努力寻找一些文档/教程/示例。关于如何在swift中进行高级tableview。但是除了无休止的故事板教程之外，我还是空洞的。
I've been trying to find some documentation/tutorial/examples. On how to do an advanced tableview in swift. But I've come up empty besides the endless storyboard tutorials.
我这样做没有故事板和笔尖。而且我还没有找到Apple以外的任何文档/解释不好/解释库。
I'm doing this without storyboards and nibs. And I haven't been able to find any documentation beyond's Apple's /poorly/ explained library.
我没有试图准确解释我在寻找什么，我会只需在下方显示设计图片。
Rather than trying to explain exactly what I'm looking for, I'll simply show an image of the design below.
现在，我显然不是要求你们为我创造这个。我只是希望你能给我发一些文档/教程的链接。这解释了如何使细胞不同？以及如何以编程方式在单元格中定位元素。
Right now, I'm obviously not asking you guys to create this for me. I'm simply hoping you can send me a link to some documentation/tutorial. That explains how to make cells different? and how you position elements within a cell programmatically.
我一直在搜索单元格约束，但我找不到任何？
I've been searching for cell constraints, but I can't find any?
我也研究了原型细胞，但我能找到的只是与故事板有关。
I looked into prototype cells too, but all I could find was storyboard related.
我希望你们能给我看一个例子类似的东西，一些文档/教程。
I'm hoping you guys could show me an example of something similar, some documentation / tutorial.
另一个重要的事情。我发现的任何文档都没有使用故事板。全部使用了tableViewController。
Another important thing. Any documentation I did find that wasn't using storyboards. All used a tableViewController.
我正在使用带有UITableView的UIViewController。不是tableViewController，它似乎对它的工作方式产生了巨大的影响。
I'm using a UIViewController, with a UITableView. Not a tableViewController, which seems to make a huge difference on how it works.
现在我只是想让原型工作。
Right now I'm just trying to get a prototype working.
这里是我的数据：
var objects = NSMutableArray()
var dataArray = [ ["stockName":"CTC Media Inc.","action":"sell","stockPrice":12.44],
["stockName":"Transglobal Energy","action":"buy","stockPrice":39.40],
["stockName":"NU Skin Enterprises","action":"buy","stockPrice":4.18]
]
我只能从中抓取并显示一条数据。
I've only been able to grab and display one piece of data from it though.
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
//return self.stocks.count
return dataArray.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as UITableViewCell
let object = dataArray[indexPath.row] as NSDictionary
cell.textLabel?.text = object["stockName"] as? String
return cell
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
println("You selected cell #\(indexPath.row)!")
}
但我是我仍然对如何定位这些数据或添加更多数据毫无头绪。例如右边的UIView具有特定的背景颜色。将UILabel置于该UIView中，在左侧添加一个带有填充的UIView，单元格之间自定义间距。等等。
But I'm still clueless on how I position this data, or add more to it. Such as the UIView on the right with a specific background color. Centering a UILabel within that UIView, adding a UIView on the left with padding, custom spacing between cells. Etc. etc.
任何帮助，文档链接，建议都将不胜感激！
Any help, links to documentation, suggestions would be greatly appreciated!
编辑：
我尝试在单元格中添加约束。 cell.view.addConstraints（
I tried adding constraints inside the cell with. "cell.view.addConstraints("
但当然它会抛出错误，说UITableViewCell没有名为view的成员。
But of course it throws an error saying "UITableViewCell does not have a member named view".
至于如何在细胞内进行约束，我仍然是空白的:(
So as for how to do constraints inside cells, I'm still blank :(
编辑2 - 进展：
我设法使用以下代码显示UIView：
I managed to get a UIView to show up using the following code:
testView.setTranslatesAutoresizingMaskIntoConstraints(false)
testView.backgroundColor = UIColor.redColor()
cell.addSubview(testView)
var viewsDictionary = [ "testView":testView]
cell.addConstraints(
NSLayoutConstraint.constraintsWithVisualFormat(
"H:|-50-[testView]|", options: nil, metrics: nil, views: viewsDictionary))
cell.addConstraints(
NSLayoutConstraint.constraintsWithVisualFormat(
"V:|[testView]|", options: nil, metrics: nil, views: viewsDictionary))
然而，对于索姆原因，它只显示在最后一个单元格中，而不是所有单元格中？
However, for some reason, it only shows up in the last cell, not all cells?
推荐答案
我只是玩了一点点。尽管所有的颜色/字体都不太合适，但这将为您提供良好的起点。希望它对你有所帮助。
I just played little bit. Even though all the colors/fonts are not quite right, this will give you good starting point. Hope it helps you.
class Stock {
var name: String?
var action: String?
var price: String?
init(stockData: [String: AnyObject]) {
if let n = stockData["stockName"] as? String {
name = n
}
if let a = stockData["action"] as? String {
action = a
}
if let p = stockData["stockPrice"] as? Float {
price = NSString(format: "%.2f", p)
}
}
var backgroundColor: UIColor {
if action == "sell" {
return UIColor.greenColor()
}
return UIColor.blueColor()
}
var typeColor: UIColor {
if action == "sell" {
return UIColor.blackColor()
}
return UIColor.purpleColor()
}
var priceLabelColor: UIColor {
if action == "sell" {
return UIColor.redColor()
}
return UIColor.greenColor()
}
}
class StockCell: UITableViewCell {
let padding: CGFloat = 5
var background: UIView!
var typeLabel: UILabel!
var nameLabel: UILabel!
var priceLabel: UILabel!
var stock: Stock? {
didSet {
if let s = stock {
background.backgroundColor = s.backgroundColor
priceLabel.text = s.price
priceLabel.backgroundColor = s.priceLabelColor
typeLabel.text = s.action
typeLabel.backgroundColor = s.typeColor
nameLabel.text = s.name
setNeedsLayout()
}
}
}
override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
backgroundColor = UIColor.clearColor()
selectionStyle = .None
background = UIView(frame: CGRectZero)
background.alpha = 0.6
contentView.addSubview(background)
nameLabel = UILabel(frame: CGRectZero)
nameLabel.textAlignment = .Left
nameLabel.textColor = UIColor.blackColor()
contentView.addSubview(nameLabel)
typeLabel = UILabel(frame: CGRectZero)
typeLabel.textAlignment = .Center
typeLabel.textColor = UIColor.whiteColor()
contentView.addSubview(typeLabel)
priceLabel = UILabel(frame: CGRectZero)
priceLabel.textAlignment = .Center
priceLabel.textColor = UIColor.whiteColor()
contentView.addSubview(priceLabel)
}
required init(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func prepareForReuse() {
super.prepareForReuse()
}
override func layoutSubviews() {
super.layoutSubviews()
background.frame = CGRectMake(0, padding, frame.width, frame.height - 2 * padding)
typeLabel.frame = CGRectMake(padding, (frame.height - 25)/2, 40, 25)
priceLabel.frame = CGRectMake(frame.width - 100, padding, 100, frame.height - 2 * padding)
nameLabel.frame = CGRectMake(CGRectGetMaxX(typeLabel.frame) + 10, 0, frame.width - priceLabel.frame.width - (CGRectGetMaxX(typeLabel.frame) + 10), frame.height)
}
}
在视图控制器中
var stocks: [Stock] = []
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = UIColor.whiteColor()
for stockData in dataArray {
var stock = Stock(stockData: stockData)
stocks.append(stock)
}
tableView = UITableView(frame: view.bounds, style: .Grouped)
tableView.delegate = self
tableView.dataSource = self
tableView.separatorStyle = .None
tableView.registerClass(StockCell.self, forCellReuseIdentifier: NSStringFromClass(StockCell))
view.addSubview(tableView)
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return stocks.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier( NSStringFromClass(StockCell), forIndexPath: indexPath) as StockCell
cell.stock = stocks[indexPath.row]
return cell
}
func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
return 70
}
自定义单元格
class StockCell: UITableViewCell {
let padding: CGFloat = 5
var background: UIView!
var typeLabel: UILabel!
var nameLabel: UILabel!
var priceLabel: UILabel!
var stock: Stock? {
didSet {
if let s = stock {
background.backgroundColor = s.backgroundColor
priceLabel.text = s.price
priceLabel.backgroundColor = s.priceLabelColor
typeLabel.text = s.action
typeLabel.backgroundColor = s.typeColor
nameLabel.text = s.name
setNeedsLayout()
}
}
}
override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
backgroundColor = UIColor.clearColor()
selectionStyle = .None
background = UIView(frame: CGRectZero)
background.alpha = 0.6
contentView.addSubview(background)
nameLabel = UILabel(frame: CGRectZero)
nameLabel.textAlignment = .Left
nameLabel.textColor = UIColor.blackColor()
contentView.addSubview(nameLabel)
typeLabel = UILabel(frame: CGRectZero)
typeLabel.textAlignment = .Center
typeLabel.textColor = UIColor.whiteColor()
contentView.addSubview(typeLabel)
priceLabel = UILabel(frame: CGRectZero)
priceLabel.textAlignment = .Center
priceLabel.textColor = UIColor.whiteColor()
contentView.addSubview(priceLabel)
}
required init(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func prepareForReuse() {
super.prepareForReuse()
}
override func layoutSubviews() {
super.layoutSubviews()
background.frame = CGRectMake(0, padding, frame.width, frame.height - 2 * padding)
typeLabel.frame = CGRectMake(padding, (frame.height - 25)/2, 40, 25)
priceLabel.frame = CGRectMake(frame.width - 100, padding, 100, frame.height - 2 * padding)
nameLabel.frame = CGRectMake(CGRectGetMaxX(typeLabel.frame) + 10, 0, frame.width - priceLabel.frame.width - (CGRectGetMaxX(typeLabel.frame) + 10), frame.height)
}
}
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