ios - UICollectionViewCell 计数总是返回 0

Question

在我的应用程序中使用 Singleton 类，刚刚创建了一个 json 数组。在 UICollectionView 中，我返回具有共享实例的单例类，如下所示

func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    print("Count: ",InsuranceManager.sharedInstance.InsTypeListArray.count) // Output Count : 0

    return InsuranceManager.sharedInstance.InsTypeListArray.count
}

计数始终为“0”。这样 Collection View 单元格就不会显示了。单例类:

import UIKit

class InsuranceManager {

static let sharedInstance = InsuranceManager()

var InsTypeListArray = [InsuranceType]()
var TypeArray =  [InsuranceType]()

var CompListArray = [Companies]()

func getInsuranceDetails() {

    if let path = NSBundle.mainBundle().pathForResource("type", ofType: "json") {
        do
        {
            let data = try NSData(contentsOfURL: NSURL(fileURLWithPath: path), options: NSDataReadingOptions.DataReadingMappedIfSafe)
            let jsonObj = JSON(data: data)
            if jsonObj != JSON.null
            {
                print("jsonData:\(jsonObj)")
                if let items = jsonObj["type"].array
                {
                    // Removing the old data from Insurance type array
                    self.InsTypeListArray.removeAll()

                    for item in items
                    {
                        var type = InsuranceType()

                        type.id = item["id"].int
                        type.name = item["name"].string
                        type.selectedQuantity = 1
                        type.imageName = item["imageName"].string

                        // Adding new data into Insurance type array
                        self.InsTypeListArray.append(type)
                    }
                    print("Insurance List Array Count:\(self.InsTypeListArray.count)")
                }
            }
            else {
                print("could not get json from file, make sure that file contains valid json.")
            }
        }
        catch let error as NSError {
            print(error.localizedDescription)
        }
    }
    else {
        print("Invalid filename/path.")
    }
}
}

计数值变为 0，因此 Collection View 单元格为空。

struct InsuranceType
{
    var id: Int?
    var name: String?
    var selectedQuantity: Int?
    var imageName: String?
}

我的 json 文件是:

{
"type": [
    {
              "id": 1001,
              "name": "Vehicle",
              "imageName": "vehicle"
    },
    {
              "id": 1002,
              "name": "Health",
              "imageName": "health"
    },
    {
              "id": 1003,
              "name": "Life",
              "imageName": "life"
    },
    {
              "id": 1004,
              "name": "House",
              "imageName": "home"
    },
    {
              "id": 1005,
              "name": "Legal Protection",
              "imageName": "legal"
    },
    {
              "id": 1006,
              "name": "Travel",
              "imageName": "travel"
    }
]
}

基于我在 json“类型”文件中的值，想要在 UICollectionView 中显示。任何人都可以帮助我我的代码中的实际问题是什么。提前致谢

Answer 1

我认为您永远不会调用 getInsuranceDetails 函数。你只得到 arrayValue。您可以调用该函数或在初始化中执行