Arrays Swift 3多核心数据保存
我需要像保存对象一样保存每个字符串,但在下面的方法中,只保存最后一个字符串 你能告诉我怎样才能保存一切吗Arrays Swift 3多核心数据保存,arrays,swift,core-data,Arrays,Swift,Core Data,我需要像保存对象一样保存每个字符串,但在下面的方法中,只保存最后一个字符串 你能告诉我怎样才能保存一切吗 let appDelegate = UIApplication.shared.delegate as! AppDelegate let context = appDelegate.persistentContainer.viewContext if let doc = HTML(html: sentHTML, encodi
let appDelegate = UIApplication.shared.delegate as! AppDelegate
let context = appDelegate.persistentContainer.viewContext
if let doc = HTML(html: sentHTML, encoding: .utf8) {
print(doc.title!)
var kCounter = 2
var Variab = false
let newInfo = NSEntityDescription.insertNewObject(forEntityName: "MarksTable", into: context)
for link in doc.xpath("//td | //link") {
if (kCounter % 2) == 0 {
newInfo.setValue(link.text!, forKey: "lesson")
}
if (kCounter % 2) == 1 {
newInfo.setValue(link.text!, forKey: "mark")
}
kCounter += 1
do
{
try context.save()
print("saved ",link.text!)
}
catch
{
}
}
如果要在每次迭代中创建新的托管对象,请将let newInfo移动到循环中
for link in doc.xpath("//td | //link") {
let newInfo = NSEntityDescription.insertNewObject(forEntityName: "MarksTable", into: context)
...
此外,强烈建议在循环之后保存上下文一次