使用调用自定义 tableview 单元格的函数简化 tableview 代码
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【中文标题】使用调用自定义 tableview 单元格的函数简化 tableview 代码【英文标题】：Simplifying tableview code with function calling custom tableview cell 【发布时间】：2017-08-21 23:35:27 【问题描述】：希望通过在我的 tableview 函数中使用一个函数来简化我的代码。我认为这是可能的，但我什至不知道如何开始。我尝试创建一个函数来执行我想要的操作，但我不知道如何在我的函数中调用自定义单元格变量。
这是我要简化的代码：
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
if indexPath.section == 0
// PART 1
let cell = tableView.dequeueReusableCell(withIdentifier: "CustomCell1", for: indexPath) as! PaydayDetailCellA1
let (jobDescription, day1, day2, day3, day4, day5, day6, day7, _) = tempPaydayDailyJobs[indexPath.row]
cell.tallyView.layer.cornerRadius = cell.tallyView.bounds.height / 6.4
cell.tallyView.layer.masksToBounds = true
cell.tallyView.layer.borderColor = UIColor.lightGray.cgColor
cell.tallyView.layer.borderWidth = 0.5
cell.jobDesc.text = jobDescription
cell.dayColor1.text = day1
switch day1
case "1":
cell.dayColor1.text = ""
cell.dayColor1.backgroundColor = UIColor(red: 141/255, green: 198/255, blue: 63/255, alpha: 1)
case "X":
cell.dayColor1.text = ""
cell.dayColor1.backgroundColor = UIColor.red
case "E":
cell.dayColor1.backgroundColor = UIColor.lightGray
default:
cell.dayColor1.backgroundColor = UIColor(red: 141/255, green: 198/255, blue: 63/255, alpha: 1)
cell.dayColor1.textColor = UIColor.white
cell.dayColor2.text = day2
switch day2
case "1":
cell.dayColor2.text = ""
cell.dayColor2.backgroundColor = UIColor(red: 141/255, green: 198/255, blue: 63/255, alpha: 1)
case "X":
cell.dayColor2.text = ""
cell.dayColor2.backgroundColor = UIColor.red
case "E":
cell.dayColor2.backgroundColor = UIColor.lightGray
default:
cell.dayColor2.backgroundColor = UIColor(red: 141/255, green: 198/255, blue: 63/255, alpha: 1)
cell.dayColor2.textColor = UIColor.white
cell.dayColor3.text = day3
switch day3
case "1":
cell.dayColor3.text = ""
cell.dayColor3.backgroundColor = UIColor(red: 141/255, green: 198/255, blue: 63/255, alpha: 1)
case "X":
cell.dayColor3.text = ""
cell.dayColor3.backgroundColor = UIColor.red
case "E":
cell.dayColor3.backgroundColor = UIColor.lightGray
default:
cell.dayColor3.backgroundColor = UIColor(red: 141/255, green: 198/255, blue: 63/255, alpha: 1)
cell.dayColor3.textColor = UIColor.white
cell.dayColor4.text = day4
switch day4
case "1":
cell.dayColor4.text = ""
cell.dayColor4.backgroundColor = UIColor(red: 141/255, green: 198/255, blue: 63/255, alpha: 1)
case "X":
cell.dayColor4.text = ""
cell.dayColor4.backgroundColor = UIColor.red
case "E":
cell.dayColor4.backgroundColor = UIColor.lightGray
default:
cell.dayColor4.backgroundColor = UIColor(red: 141/255, green: 198/255, blue: 63/255, alpha: 1)
cell.dayColor4.textColor = UIColor.white
cell.dayColor5.text = day5
switch day5
case "1":
cell.dayColor5.text = ""
cell.dayColor5.backgroundColor = UIColor(red: 141/255, green: 198/255, blue: 63/255, alpha: 1)
case "X":
cell.dayColor5.text = ""
cell.dayColor5.backgroundColor = UIColor.red
case "E":
cell.dayColor5.backgroundColor = UIColor.lightGray
default:
cell.dayColor5.backgroundColor = UIColor(red: 141/255, green: 198/255, blue: 63/255, alpha: 1)
cell.dayColor5.textColor = UIColor.white
cell.dayColor6.text = day6
switch day6
case "1":
cell.dayColor6.text = ""
cell.dayColor6.backgroundColor = UIColor(red: 141/255, green: 198/255, blue: 63/255, alpha: 1)
case "X":
cell.dayColor6.text = ""
cell.dayColor6.backgroundColor = UIColor.red
case "E":
cell.dayColor6.backgroundColor = UIColor.lightGray
default:
cell.dayColor6.backgroundColor = UIColor(red: 141/255, green: 198/255, blue: 63/255, alpha: 1)
cell.dayColor6.textColor = UIColor.white
cell.dayColor7.text = day7
switch day7
case "1":
cell.dayColor7.text = ""
cell.dayColor7.backgroundColor = UIColor(red: 141/255, green: 198/255, blue: 63/255, alpha: 1)
case "X":
cell.dayColor7.text = ""
cell.dayColor7.backgroundColor = UIColor.red
case "E":
cell.dayColor7.backgroundColor = UIColor.lightGray
default:
cell.dayColor7.backgroundColor = UIColor(red: 141/255, green: 198/255, blue: 63/255, alpha: 1)
cell.dayColor7.textColor = UIColor.white
return cell
else
// PART 2
let cell2 = tableView.dequeueReusableCell(withIdentifier: "CustomCell2", for: indexPath) as! PaydayDetailCellA2
let (_, pointAmount) = tempDailyChoresSummary[indexPath.row]
cell2.dailyChoresNumber.text = "\(pointAmount)"
cell2.jobConsistencyBonusNumber.text = "\(pointAmount)"
cell2.previousUnpaidAmountsNumber.text = "\(pointAmount)"
cell2.dailyChoresSubtotalNumber.text = "\(pointAmount)"
return cell2
我在自定义表格视图单元格中有一块标签。我希望标签的背景颜色根据外部数组中的数据改变颜色。我附上了一张它的样子（如果有帮助的话）。 Here is the picture of the tableview with colored labels.
或者有没有更简单的方法来做我想做的事情？
【问题讨论】：
【参考方案1】：这种方法可以减少表函数中的代码。请记住，这是一个概念。 您可以通过创建 UITableViewCell 的扩展来打破一些重复的属性设置。
首先创建一个协议
protocol Settable
func setData(val: Int)
然后做一个扩展
extension Settable
func setData(jobDescription: String, jobSubtotal: String, cornerRadius: Float, maskToBounds: Bool, borderColor: CGColor, borderWidth: Float)
self.tallyView.layer.cornerRadius = cornerRadius
self.tallyView.layer.masksToBounds = maskToBounds
self.tallyView.layer.borderColor = borderColor
self.tallyView.layer.borderWidth = borderWidth
self.jobDesc.text = jobDescription
self.jobSubtotal.text = jobSubtotal
然后扩展你的 UITableViewCell
class PaydayNewCellA1 : UITableViewCell, Settable
class PaydayNewCellB1 : UITableViewCell, Settable
class PaydayNewCellC1 : UITableViewCell, Settable
然后你可以在你的函数中执行以下操作：
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
if (tableView == self.tableView1)
if indexPath.section == 0
let cell = tableView1.dequeueReusableCell(withIdentifier: "CustomCell1", for: indexPath) as! PaydayNewCellA1
// Now use the function
cell.setData(jobDescription: "daily job \(indexPath.row + 1)", jobSubtotal: "50", cornerRadius: cell.tallyView.bounds.height / 6.4, maskToBounds: true, borderColor: UIColor.lightGray.cgColor, borderWidth: 0.5)
return cell
else
let cell = tableView1.dequeueReusableCell(withIdentifier: "CustomCell2", for: indexPath) as! PaydayNewCellA2
return cell
else if (tableView == tableView2)
// rest of code etc
【讨论】：
谢谢，但正如以前的用户注意到的那样，我发布了错误的代码，所以你的回答虽然很好，但并不能解决我的问题。请查看更新后的代码。 （我可能在您发布答案的同时发布了它，因此您从未看到更新的代码）。以上是关于使用调用自定义 tableview 单元格的函数简化 tableview 代码的主要内容，如果未能解决你的问题，请参考以下文章
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