传递不同内容的数组

Question

我在挣扎，我希望有人能帮助我。我有一个视图控制器，包含六个按钮。根据用户单击的按钮，应该在表视图中显示不同的内容。我已经创建了数组，结构总是相同的。我的firstViecontroller连接到故事板中的视图控制器，名为: IntroViewController。第二个名为“Cat1TableViewcontroller”。

我以为我已经做了许多必要的步骤。程序运行，但是当我单击其中一个按钮时，表是空的。

以下是我为我的“第一个”ViewControllerFile所做的工作：

class IntroViewController: UIViewController
{
 var contentMode = 0

@IBAction func draussen(_ sender: Any)
{
    contentMode = 1
    performSegue(withIdentifier: "showTable", sender: self)
}


@IBAction func kiez(_ sender: Any)
{
    contentMode = 2
    performSegue(withIdentifier: "showTable", sender: self)
}

@IBAction func fahren(_ sender: Any)
{
    contentMode = 3
     performSegue(withIdentifier: "showTable", sender: self)
}


@IBAction func photo(_ sender: Any)
{
    contentMode = 4
     performSegue(withIdentifier: "showTable", sender: self)
}


@IBAction func essen(_ sender: Any)
{
    contentMode = 5
     performSegue(withIdentifier: "showTable", sender: self)

}

@IBAction func schwitzen(_ sender: Any)
{
    contentMode = 6
     performSegue(withIdentifier: "showTable", sender: self)
}

override func viewDidLoad()
{
    super.viewDidLoad()

    // Do any additional setup after loading the view.
}

override func didReceiveMemoryWarning()
{
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

}

我的“第二个”视图控制器将数组(在操作函数中)复制到一个空数组中，并进一步使用它(以便将数据传递给下一个视图控制器)。

下面是类中应该只显示用户通过单击按钮选择的数组内容的部分。

class Cat1TableViewController: UITableViewController
{
var spots:[Spot] = []
var spot2:[Spot] = [

    Spot(name:"Rye Playland", type:"Vergnügungspark am Strand",description:"hjhjhjhjhjhjhjhjhjhjhhhjh",location:"Rye",phone:"78787878787",image:"skyline", isVisited: false),
    Spot(name:"Splish Splash", type:"Wasserpark",description:"hjhjhjhjhjjhjhjjh",location:"Long Island",phone:"7878787878777878",image:"skyline", isVisited: false),
    Spot(name:"Kotti Berliner Döner", type:"Türkisches Essen",description:"hjhjhjhjhjhjhjhjhjjhjhjhjhjhjhjj",location:"Brooklyn",phone:"78787878787878787878",image:"skyline", isVisited: false),
    Spot(name:"Die größte Pizzascheibe der Welt", type:"Italienisches Essen",description:"jhjhjhjhjhjhjhjhjhjhjhj",location:"Yonkers",phone:"78787878787878",image:"skyline", isVisited: false),
    Spot(name:"Die billigste Pizzascheibe der Welt", type:"Italienisches Essen",description:"hjhjhjhjhjhjhjhjhjhjhjhjhjhjhjjh", location:"Manhattan",phone:"8989898989",image:"skyline", isVisited: false)

    ]

 var spot3:[Spot] = [
    Spot(name:"Sate in Queens", type:"Asiatisches Essen",description:"hjhjhjhjhjhjhjh",location:"Queens",phone:"787878787787", image:"skyline", isVisited: false),
    Spot(name:"Intrepid", type:"Museum",description:"hjhjhjhjhjhjhjhjh",location:"Manhattan",phone:"787878787878787",image:"skyline", isVisited: false),
    Spot(name:"Fire Island", type:"Strand",description:"hjhjhjhjhjhj",location:"Long Island",phone:"78788787878787",image:"skyline", isVisited: false),
    Spot(name:"Jones Beach", type:"Strand",description:"hjhjhjhjjhjh",location:"Long Island",phone:"78787878787878787878", image:"skyline", isVisited: false)

    ]
var spot4:[Spot] = [

Spot(name:"Waterfront in Yonkers", type:"Aussicht",description:"jhjhjhjhjhjhjjh",location:"Yonkers",phone:"8989898989899", image:"skyline", isVisited: false),
Spot(name:"Dim Sum in Queens", type:"Asiatisches Essen",description:"hjhjhjjhjhjhjhjhjhjhjhjh",location:"Queens",phone:"7878787878787", image:"skyline", isVisited: false),
Spot(name:"Koreanisches Spa", type:"Wellness",description:"hjhjhjhjhjhjhjhjhjhjhjhjhjhjhjhj",location:"Queens",phone:"787878787878878",image:"skyline", isVisited: false)
]


 var spot5:[Spot] = [
Spot(name:"Queens Botanischer Garten", type:"Botanischer Garten",description:"hjhjhjhjhjhjhjhjhjhj", location:"Queens",phone:"78787878787878",image:"skyline", isVisited: false),
Spot(name:"Open Air Kino", type:"Kino",description:"hjhjhjhjhjhjhjhjhjhjhjhjhj",location:"Brooklyn",phone:"89989898989898", image:"skyline", isVisited: false)
]


var spot6:[Spot] = [
    Spot(name:"Orchard Beach", type:"Strand",description:"jkjkjkjkjkkjkkjkjkjkjkjkjkjkjkjkjkj",location:"Bronx",phone:"7878787878", image:"skyline", isVisited: false),
    Spot(name:"Paddeln am Hudson River", type:"Natur und Bewegung",description:"hjhjhjhjhjhjhjhjhjhjhjhjhjhjhj",location:"Hudson",phone:"7787878787878787",image:"skyline", isVisited: false),
    Spot(name:"Umsonst und Draussen", type:"Washington Park",description:"hjhjhjhjhjhjhjhjhhhhhhhhghghghghghghghghghghghghghghghghghghghghghghghghghghghghghghghghghghghghghgjhjh",location:"Manhattan",phone:"8989898989898", image:"skyline", isVisited: false)

]




override func numberOfSections(in tableView: UITableView) -> Int
{
    // we tell the table view that there is only one section and return the total number of spots as stored in the array

    if IntroViewController().contentMode == 1
    {
        spots = spot1
    }

    if IntroViewController().contentMode == 2
    {
        spots = spot2
    }

    if IntroViewController().contentMode == 3
    {
        spots = spot3
    }

    if IntroViewController().contentMode == 4
    {
        spots = spot4
    }
    if IntroViewController().contentMode == 5
    {
        spots = spot5
    }
    if IntroViewController().contentMode == 6
    {
        spots = spot6
    }

    return spots.count

}

override func tableView(_ tableView: UITableView, cellForRowAt 
indexPath: IndexPath)->UITableViewCell
{
    let cellIdentifier = "Cell"
    let cell = tableView.dequeueReusableCell(withIdentifier: 
cellIdentifier, for: indexPath) as! SpotTableViewCell// because I am 
using a custom cell I am converting to the specific cell type
    // configure the cell

    if IntroViewController().contentMode == 1
    {
        spots = spot1

    }

    if IntroViewController().contentMode == 2
    {
        spots = spot2
    }

    if IntroViewController().contentMode == 3
    {
        spots = spot3
    }

    if IntroViewController().contentMode == 4
    {
        spots = spot4
    }
    if IntroViewController().contentMode == 5
    {
        spots = spot5
    }
    if IntroViewController().contentMode == 6
    {
        spots = spot6

    }

    cell.nameLabel.text = spots[indexPath.row].name
    cell.locationLabel.text = spots[indexPath.row].location
    cell.typeLabel.text = spots[indexPath.row].type
    cell.thumbnailImageView.image = 
  UIImage(named:spots[indexPath.row].image)

    //cell.heartImageView.isHidden = spots[indexPath.row]isVisited ? 
 false : true
    return cell
}

我很高兴能得到任何帮助。

谢谢。

Answer 1

您应该将应该从不同UIViewControllers访问的数据存储在一个单独的服务中，如下所示：

class DataFactory {

    var contentMode = 0

    static let sharedInstance : DataFactory = {
        let instance = DataFactory()
        return instance
    }()

    var spot2:[Spot] = []
    ...

而不是像这样在ViewControllers中访问该服务：

 //Setting the content mode
 DataFactory.sharedInstance.contentMode = 1

 //Getting the result array 
 let yourArray = DataFactory.sharedInstance.spot2

您还可以将数据存储在数组中，并可以使用contentMode指示器作为索引。

示例：

//two dimensional array of spots
var spots = [[Spot]]();

//than you can store your spot arrays inside this two dimensional array
spots.append(spot2);

//accessing the spots via contentMode-Index (I would rename the contentMode to spotsIndex or something similar)
let currentSpots = spots[self.contentMode];