我在父类中定义了一个全局数组,并且我试图让数组填充从REST
服务GET
调用来自JSON
文件的对象。我的想法是我定义了全局数组,填充了从JSON文件填充的对象,然后数据将在我的tableviewcell
内部类中使用。但是我注意到数据被填满,它正确地得到json
,数据被输入到数组中,但是一切都在方法之外被删除了。在内部类中,数据不存在,甚至在网络请求括号之外。我无法想象这是什么问题。
这是我将数组初始化为全局数组:
class ContentDeliveryViewController: UITableViewController, UISearchBarDelegate, UISearchDisplayDelegate{
public var ListOfFiles: [Asset_Content] = []
public var ListOfTags: [String] = []
这是获取json并使用数组填充的方法,其中括号外的print语句表示数组已为空。
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
print("short CALLED")
let cell = self.tableView.dequeueReusableCell(withIdentifier: "ContentDeliveryCell", for: indexPath as IndexPath) as! ContentDeliveryCell
var content: AWSContent
//fix this
if(tableView == self.searchDisplayController?.searchResultsTableView){
print("search part called!!")
content = filteredList[indexPath.row]
}else{
content = contents![indexPath.row]
}
if(content.key.contains(IDENTIFIER)){
//
let url = URL(string: URL)
let task = URLSession.shared.dataTask(with: url!){
data, response, error in guard error == nil else{
print(error!)
return
}
guard let data = data else{
print("Data is empty")
return
}
let json = try! JSONSerialization.jsonObject(with: data, options: JSONSerialization.ReadingOptions.allowFragments) as? [[String: AnyObject]]
var asset: Asset_Content
for jay in json! {
let category = jay["BIGCATEGORY"] as? String
let diagnosis = jay["DIAGNOSIS"] as? String
let perspective = jay["PERSPECTIVE"] as? String
let name = jay["NAME"] as? String
let title = jay["Title"] as? String
let UnparsedTags = jay["TAGS"] as? String
let filename = jay["FILENAME"] as? String
let tagArray = UnparsedTags?.characters.split(separator: ",")
for tag in tagArray!{
if(self.ListOfTags.contains(String(tag))){
}else{
self.ListOfTags.append(String(tag))
print("TAGCOUNT == ", self.ListOfTags.count)
}
}
asset = Asset_Content(category!, diagnosis!, perspective!, name!, title!, filename!)
self.loadJson(forFile: asset)
print("RightCount === ", self.ListOfFiles.count)// FILLED ARRAY
}
print("FirstCount === ", self.ListOfFiles.count)//FILLED ARRAY
}
task.resume()
cell.isHidden = true
print("FirstCount === ", self.ListOfFiles.count)// EMPTY ARRAY
print("TAGCOUNT == ", self.ListOfTags.count) // EMPTY ARRAY
return cell
}else{
cell.prefix = prefix
cell.content = content
print("KEY" ,content.key)
cell.isHidden = false
return cell
}
}
答案 0 :(得分:0)
正确的方式: