2016-11-18 90 views
0

TitleForHeaderInSection問題,我剛纔似乎不對,就讓它作爲調用命名我的頭關注。斯威夫特:與執行

如果你想知道我的模型是關於什麼的 - 它基本上包含美麗的地方字典,按字母順序寫的。

可能有人幫助我,因爲我真的不能找出我做錯了嗎?

import UIKit 

class PlacesTableViewController: UITableViewController { 

    // MARK: - Table view data source 

    override func numberOfSections(in tableView: UITableView) -> Int { 
     return model.places.count 
    } 

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 
     switch section { 
     case 0: return (model.places["A"]!.count) 
     case 1: return (model.places["B"]!.count) 
     case 2: return (model.places["C"]!.count) 
     case 3: return (model.places["F"]!.count) 
     case 4: return (model.places["G"]!.count) 
     case 5: return (model.places["H"]!.count) 
     case 6: return (model.places["M"]!.count) 
     case 7: return (model.places["N"]!.count) 
     case 8: return (model.places["P"]!.count) 
     case 9: return (model.places["R"]!.count) 
     case 10: return (model.places["S"]!.count) 
     case 11: return (model.places["T"]!.count) 
     case 12: return (model.places["V"]!.count) 
     case 13: return (model.places["Y"]!.count) 
     case 14 : return (model.places["Z"]!.count) 
     default: return 1 
     } 
    } 

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { 
     let cell = tableView.dequeueReusableCell(withIdentifier: "PlacesCell", for: indexPath) 

     switch indexPath.section { 
     case 0: cell.textLabel?.text = model.places["A"]?[indexPath.row] 
     case 1: cell.textLabel?.text = model.places["B"]?[indexPath.row] 
     case 2: cell.textLabel?.text = model.places["C"]?[indexPath.row] 
     case 3: cell.textLabel?.text = model.places["F"]?[indexPath.row] 
     case 4: cell.textLabel?.text = model.places["G"]?[indexPath.row] 
     case 5: cell.textLabel?.text = model.places["H"]?[indexPath.row] 
     case 6: cell.textLabel?.text = model.places["M"]?[indexPath.row] 
     case 7: cell.textLabel?.text = model.places["N"]?[indexPath.row] 
     case 8: cell.textLabel?.text = model.places["P"]?[indexPath.row] 
     case 9: cell.textLabel?.text = model.places["R"]?[indexPath.row] 
     case 10: cell.textLabel?.text = model.places["S"]?[indexPath.row] 
     case 11: cell.textLabel?.text = model.places["T"]?[indexPath.row] 
     case 12: cell.textLabel?.text = model.places["V"]?[indexPath.row] 
     case 13: cell.textLabel?.text = model.places["Y"]?[indexPath.row] 
     case 14: cell.textLabel?.text = model.places["Z"]?[indexPath.row] 
     default: break 
     } 
     return cell 
    } 

    override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? { 
     let cell = tableView.dequeueReusableCell(withIdentifier: "HeaderCell") 
     switch section { 
     case 0: cell?.textLabel?.text = "A" 
     case 1: cell?.textLabel?.text = "B" 
     case 2: cell?.textLabel?.text = "C" 
     case 3: cell?.textLabel?.text = "F" 
     case 4: cell?.textLabel?.text = "G" 
     case 5: cell?.textLabel?.text = "H" 
     case 6: cell?.textLabel?.text = "M" 
     case 7: cell?.textLabel?.text = "N" 
     case 9: cell?.textLabel?.text = "P" 
     case 10: cell?.textLabel?.text = "R" 
     case 11: cell?.textLabel?.text = "S" 
     case 12: cell?.textLabel?.text = "T" 
     case 13: cell?.textLabel?.text = "Y" 
     case 14: cell?.textLabel?.text = "Z" 
     default: break 
     } 

     return String(describing: cell) 
    } 
} 
+0

相反,你可能會認爲,一個UITableView頭視圖的類型UITableViewHeaderFooterView,而不是定義UITableViewCell。您應該從nib加載它而不是使用dequeReuseableCell。或者使用UICollectionView,它以UICollectionReusableView的形式具有可重用的頁眉/頁腳視圖。 –

+0

@JoshHomann該OP不使用'viewForHeader'或'viewForFooter'。 OP使用'titleForHeader ...',所以需要一個簡單的字符串。 – rmaddy

回答

0

你在殺我小。 ;)

import UIKit 

class PlacesTableViewController: UITableViewController { 

    let letters = ["A", "B", "C", "F", "G", "H", "M", "N", "P", "R", "S", "T", "V", "Y", "Z"] 

    // MARK: - Table view data source 

    override func numberOfSections(in tableView: UITableView) -> Int { 
     return model.places.count 
    } 

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 
     let letter = letters[section] 
     return model.places[letter]?.count ?? 1 
    } 

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { 
     let cell = tableView.dequeueReusableCell(withIdentifier: "PlacesCell", for: indexPath) 
     let letter = letters[indexPath.section] 
     cell.textLabel?.text = model.places[letter]?[indexPath.row] 
     return cell 
    } 

    override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? { 
     let letter = letters[section] 
     return letter 
    } 
} 

編輯:

看一看UITableViewDelegate詢問。

編輯你要使用專門viewForHeaderInSection實際頭視圖。

+0

非常感謝! :) 請問您介意後續問題嗎?那麼我將如何設計這些部分?像改變字體大小或改變背景等? –

+0

沒問題。檢查我的編輯。 – Frankie

0

除了你可能需要重新考慮你的模型是如何工作的事實。 titleForHeaderInSection只是想要一個字符串,UIKit會處理剩下的部分。所以不要返回String(describing: cell),因爲這只是單元格的名稱。你需要返回你想要設置textLabel的字符串。因此,保持了開關,但每個案例,而不是

cell?.textLabel?.text = "{Letter}"

做到這一點:

return "{Letter}"

,取下讓細胞...行和最後回線