swift - 快速在标签中显示数组

Question

我想要两个从 Parse 快速获取的显示对象数据。我试过以这种方式使用标签，但它只显示对象中的最后一个元素。请问如何让它显示标签中对象中的所有元素。就像一个元素对应一个标签。谢谢

 let query = PFQuery(className: "Questionnaire")
 query.findObjectsInBackground { (objects, error) -> Void in
    if error == nil {

     // There were no errors in the fetch
        if let returnedObjects = objects {
     // var text = ""
     // Objects Array is not nil
     // loop through the array to get each object

             for object in returnedObjects {
                 print(object["question"] as! String)
                 // text.append(object["question"] as! String)
                self.Label.text = (object["question"] as! String)


             }


        }
    }
 }

Answer 1

你可以像这样在一行中，然后用, 分隔符加入所有问题，你可以将分隔符更改为任何(空，-，...等等)

if let returnedObjects = returnedObjects {
    self.Label.text = returnedObjects.map {($0["question"] as? String) ?? nil}.compactMap({$0}).joined(separator: ",")
}