Swift 将数据从TableViewCell标签传递到ViewController
项目: 我需要将数据从TableView传递到ViewController。数据显示在具有两个标签和UIIMage(名称、详细信息、照片)的单元格上,单击该标签和UIIMage会将您带到另一个显示信息的详细信息视图控制器 现在,数据存储在视图控制器中的三个数组中,但是当我与教授交谈时,他告诉我,最简单的方法是将数据存储在单独的文件中。我真的不知道如何做到这一点,并将感谢任何帮助,无论是一种方式或另一种方法Swift 将数据从TableViewCell标签传递到ViewController,swift,Swift,项目: 我需要将数据从TableView传递到ViewController。数据显示在具有两个标签和UIIMage(名称、详细信息、照片)的单元格上,单击该标签和UIIMage会将您带到另一个显示信息的详细信息视图控制器 现在,数据存储在视图控制器中的三个数组中,但是当我与教授交谈时,他告诉我,最简单的方法是将数据存储在单独的文件中。我真的不知道如何做到这一点,并将感谢任何帮助,无论是一种方式或另一种方法 import UIKit class ViewController: UIViewCon
import UIKit
class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
var names = ["Brown Diner", "Kirkland", "Choco", "Lil Wayne", "Annie", "Social"]
var details = ["Free drink with meal after 12 AM", "LADIES drink free", "10% off all ice cream!", "concert", "a Theater Production", "Bring your Squad to the Social"]
var images = [UIImage(named: "brown"), UIImage(named: "kirk"), UIImage(named: "choco"), UIImage(named: "lilwayne"), UIImage(named: "default"), UIImage(named: "default")]
override func viewDidLoad() {
super.viewDidLoad()
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = self.eventsTable.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! CustomCell
cell.name.text = names[indexPath.row]
cell.detail.text = details[indexPath.row]
cell.photo.image = images[indexPath.row]
return cell
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.names.count
}
//
// override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
//
// if segue.identifier == "detailsSegue" {
// guard let eventVC = segue.destinationViewController as? DetailsViewController,
// let eventIndex = tableView.indexPathForSelectedRow?.row else {
// return
// }
// eventVC.eventName = names[eventIndex]
// eventVC.eventDetail = details[eventIndex]
// eventVC.eventPhoto = images[eventIndex]
// }
//
// }
}
我的详细信息查看控制器
import UIKit
class DetailsViewController : UIViewController {
@IBOutlet var detailsLabel: UILabel!
@IBOutlet var detailsImage: UIImageView!
@IBOutlet var detailsDesc: UILabel!
override func viewDidLoad() {
}
}
我的CustomCell.swift文件
import UIKit
class CustomCell: UITableViewCell {
@IBOutlet var photo: UIImageView!
@IBOutlet var name: UILabel!
@IBOutlet var detail: UILabel!
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override func setSelected(selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
}
我对斯威夫特很陌生,事实证明这对我来说是非常有挑战性的。我不是一个真正的程序员,但是一个项目要求我为一个我是UI/UIX设计者的应用程序完成一些编码。提前感谢您的帮助
class CustomCell: UITableViewCell {
weak var superTableView: ViewController!
.....
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = self.eventsTable.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! CustomCell
cell.superTableView = self
}
现在,您可以将数据传递给ViewController的任何属性,您可以使用数组中的数据创建一个JSON文件,并将其添加到项目中:
import UIKit
class DetailsViewController : UIViewController {
@IBOutlet var detailsLabel: UILabel!
@IBOutlet var detailsImage: UIImageView!
@IBOutlet var detailsDesc: UILabel!
override func viewDidLoad() {
}
}
{
"events":[
{
"name": "BTown Diner",
"details": "Free drink with meal after 12 AM",
"image": "btown"
},
{
"name": "Dunnkirk",
"details": "LADIES drink free",
"image": "dunn"
},
{
"name": "Chocolate Mousse",
"details": "10% off all ice cream!",
"image": "choco"
},
{
"name": "Lil Wayne",
"details": "Lil 500 concert",
"image": "lilwayne"
},
{
"name": "Annie",
"details": "an IU Theater Production",
"image": "default"
},
{
"name": "Campus Squad Social",
"details": "Bring your Squad to the Campus Squad Social",
"image": "default"
},
]
}
创建一个事件
类来封装单个事件的数据:
import UIKit
class Event {
let name: String!
let details:String!
let image: UIImage!
init(eventData: [String: String])
{
self.name = eventData["name"]
self.details = eventData["details"]
self.image = UIImage(named: eventData["image"]!)
}
}
将Event类型的属性添加到DetailsViewController:
import UIKit
class DetailsViewController : UIViewController {
// To get the event from the main view controller
var event: Event!
@IBOutlet var detailsLabel: UILabel!
@IBOutlet var detailsImage: UIImageView!
@IBOutlet var detailsDesc: UILabel!
override func viewDidLoad() {
detailsLabel.text = event.name
detailsDesc.text = event.details
detailsImage.image = event.image
}
}
将类事件数组添加到主ViewController
读取ViewDidLoad中的JSON数据并填充事件
数组
执行prepareForSegue并使用所选事件设置DetailsViewController的事件属性
import UIKit
class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
@IBOutlet var tableView: UITableView!
// Created an Event class to store the event data
// Moved the hard coded data to Events.json
var events = [Event]()
override func viewDidLoad() {
super.viewDidLoad()
// Read the JSON data from main bundle
if let path = NSBundle.mainBundle().pathForResource("Events", ofType: "json") {
do {
let jsonData = try NSData(contentsOfFile: path, options: NSDataReadingOptions.DataReadingMappedIfSafe)
let parsedData = parseJSON(jsonData); // parse data to Swift dictionary
print(parsedData)
if let result = parsedData.result where parsedData.error == nil {
if let eventsData = result["events"] as? [[String : String]] {
for event in eventsData {
events.append(Event(eventData: event)) // Create an event from JSON data and add to the list
}
}
}
} catch {}
}
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return events.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = self.tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! CustomCell
cell.name.text = events[indexPath.row].name
cell.detail.text = events[indexPath.row].details
cell.photo.image = events[indexPath.row].image
return cell
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "detailsSegue" {
guard let eventVC = segue.destinationViewController as? DetailsViewController,
let eventIndex = tableView.indexPathForSelectedRow?.row else {
return
}
// set the event to detail view controller
eventVC.event = events[eventIndex]
}
}
// Standard JSON parsing code
func parseJSON(data: NSData) -> (result: [String : AnyObject]?, error: NSError?) {
var parsingError: NSError? = nil
let parsedResult: [String : AnyObject]?
do {
parsedResult = try NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.AllowFragments) as? [String : AnyObject]
} catch let error as NSError {
parsingError = error
parsedResult = nil
}
return (parsedResult, parsingError)
}
}
希望这有帮助 准备数据
您的教授可能是指将数据存储在另一个类/结构中,例如:
struct Data {
let name : String
let detail : String
let image : String
}
您可以使用此结构的数组填充tableview:让数据=[data]
它非常简单,您可以像以前一样访问它:
cell.name.text = data[indexPath.row].name
cell.detail.text = data[indexPath.row].detail
cell.photo.image = UIImage(named: data[indexPath.row].image)
您也可以通过使用数组(或字典/元组)的数组来实现相同的结果:
如何传递数据
由于您已经开始使用prepareforsgue
,因此可以使用以下方法传递数据:
在tableView(didSelectRowAtIndexPath:)
中,使用以下命令启动segue并将数据作为发送方传递:
performSegueWithIdentifier("detailsSegue", sender: data[indexPath.row])
在prepareForSegue
中:
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "detailsSegue" {
let controller = segue.destinationViewController as! DetailsViewController
controller.info = sender as? Data // controller.info is an optional here
}
}
如何创建数据数组
继续现有的操作,您可以轻松创建如下阵列:
let names = ["Brown Diner", "Kirkland", "Choco"]
let details = ["Free drink", "Ladies free", "10% discount"]
let images = ["brown", "kirk", "choco"] // Changed this to an array of type String
let data = zip(zip(names, details), images).map { Data(name: $0.0.0, detail: $0.0.1, image: $0.1) }
我不太清楚您想对您的详细信息做什么查看控制器如何是的,谢谢。对不起,我是一个傻瓜。。。如何创建JSON文件?我对您上面提到的GitHub repo进行了更改,并提出了一个拉取请求。。要在Xcode中创建JSON文件,请选择file->New->Other->Empty,并将文件命名为您想要的名称。我知道这需要一些时间,但您的回答非常有用!我感觉如此接近,我可以品尝它,然而,我不断收到一个未解决的标识符“事件”的错误。。。你知道怎么解决这个问题吗@muneebHave您是否创建了如我的答案中所示的类事件?另外,请检查您的GitHub repo,我已经创建了一个包含这些更改的pull请求,因此如果您接受并合并该pull请求,您将有一个工作版本可供参考。