我試圖從tableview控制器B傳遞一個圖標和一個名稱,通過委託來查看控制器A.將TableviewController B中的圖標和名稱傳遞給TableviewController A
爲了把這個簡單的,一個用戶呈現的ViewController A:(這裏顯示)
的ViewController A和源代碼
的ViewController源
//
// MasterTableViewController.swift
// Sample image
//
//
import UIKit
class MasterTableViewController: UITableViewController, IconselectedDelegate {
@IBOutlet weak var passedIconName: UILabel!
var tempname: String?
override func viewDidLoad() {
super.viewDidLoad()
self.title = "Master"
}
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(true)
}
func iconName(iconName: String) -> String {
self.tempname = iconName
self.passedIconName.text = "\(iconName)"
return tempname!
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
因此,當用戶點擊這個單元格,然後向用戶展示另一個顯示圖標列表的視圖控制器(viewController B)。以下是此示例的屏幕截圖和源代碼。
的ViewController乙
這裏是的viewController乙 的ViewController B碼
//
// IconTableViewController.swift
// Sample image
//
// Created by me on 4/18/16.
//
import UIKit
protocol IconselectedDelegate {
func iconName(iconName: String)-> String
}
class IconTableViewController: UITableViewController {
enum Icon: Int {
case Study
case Apple
var icon: UIImage {
switch self {
case.Study: return UIImage(named: "study")!
case.Apple: return UIImage(named: "apple")!
}
}
}
var icons = ["Study", "Apple"]
var delegate: IconselectedDelegate? = nil
var selectedIndex = 0
// holding vars
var image: UIImage?
var name: String?
override func viewDidLoad() {
super.viewDidLoad()
self.title = "Icon selection"
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return icons.count
}
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
let cell: UITableViewCell! = tableView.cellForRowAtIndexPath(indexPath)
if cell.accessoryType == UITableViewCellAccessoryType.None {
if indexPath.row == 0 {
self.name = icons[0]
} else if indexPath.row == 1 {
self.name = icons[1]
}
cell.accessoryType = UITableViewCellAccessoryType.Checkmark
self.navigationController?.popToRootViewControllerAnimated(true)
}
selectedIndex = indexPath.row
tableView.reloadData()
tableView.deselectRowAtIndexPath(indexPath, animated: true)
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cellIdentifier = "Cell"
let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath: indexPath) as! IconTableViewCell
// Configure the cell...
cell.iconName.text = icons[indexPath.row]
if let iconIndex = Icon(rawValue: indexPath.row) {
cell.iconPreview.image = iconIndex.icon
}
return cell
}
override func viewWillDisappear(animated: Bool) {
super.viewWillAppear(true)
if name == nil {
delegate?.iconName("None")
} else {
delegate?.iconName(name!)
print("Delegate left with \(delegate?.iconName(name!))")
}
}
}
問題
示例代碼我想將所選圖標傳遞迴顯示名稱和圖標圖像的主視圖控制器。 (在主視圖控制器中,有一個UIImage對象,但你不能在UILable旁邊看到它說'選擇')
我該如何做到這一點?我用這個類似的代碼來完成UIColor,它工作,但它似乎並沒有處理圖像。
將極大地幫助
我想你是不是委託屬性設置爲自在Viewcontroller中。按照慣例,您的委託名稱應該以大寫字符開頭:SetIconValueDelegate。請參閱我的答案並管理您的代碼 – Lion