Question

我有一个表格视图，显示用户的姓名，公司名称和照片（PFFile）。我拥有的每个tableView行都包含所有这些信息。

我正在使用UISearchBarDelegate和IB来实现搜索功能，以按用户的名称进行过滤。它找到了正确的用户，但我无法更新公司照片。

如何过滤其他阵列？我需要从数组中获取的项目与从用户的Name数组中获取的项目相同。

编辑：我正在尝试不同的数据结构，并且接收的数组索引超出范围，更新代码如下：

var filterArray = [User]()  //<-- globally declared
var userArray = [User]() //< Global


class User {

var name: String?
var company: String?

init (name: String?, company: String?) {

    self.name = name
    self.company = company
    }
}
//In a class which populates the search arrays
for object in unwrappedSucceeded {

   let username = object.valueForKey("username") as! String
   let companyName = object.valueForKey("companyName") as! String
   let user = User(name: username, company: companyName)

    userArray.append(user)
}

//tableViewController

func searchBar(searchBar: UISearchBar, textDidChange searchText: String) {

    filterArray.removeAll(keepCapacity: false)

    if searchText.characters.count != 0 {
        isSearch = true

        self.search(searchText)

    } else {
        isSearch = false
    }
}


func search(text: String) -> Void {

    filterArray = userArray.filter({$0.name == text})

}
//In cellForRowAtIndexPath
            cell.usernameCell.text = filterArray[indexPath.row].name //ARRAY INDEX OUT OF RANGE

Answer 1

就像我说的那样，强烈建议您将每个用户的信息分组到一个大容器中，因此我们可以使用struct或class数组，然后更容易过滤。

容器示意图：

struct Container
{
  var username:String?
  var companyName:String?
  var photo:UIImage?
}

您的主阵列将是：var arrayofData = [Container]()

现在，当您从查询函数

中查询对象时

// after you called the findObjectsWithBackgroundBlock()
// let's assume you check for error and if the [PFObject] is empty or not 

 for one in objectsFromParse
 {
  let photoToget = one["Photo"] as! PFFile
 // next step should be to get the image data right :) 
 {
    // let's assume that is the block when get the image data right:)
    // check your data and assign it to some UIImage
     // then 
     let userRepresentation = Container()  //<-- we are creating a single object representation for each user 

     let username = one["username"] as! String    //<--data we got from Parse
     let companyName = one["companyName"] as! String
     let userImage = //the UIImage which contains the data 

     userRepresentation.username = username
     userRepresentation.companyName = companyName
     userRepresentation.photo = userImage

  // then we append 
    arrayOfData.append(userRepresentation)
 }
}

现在我们已将所有数据都包含在我们的数组中，因此请按用户名过滤，我希望您配置tableView，以便在获得来自过滤器或常规数组的数据时。

  var filterArray = [Container]()  //<-- globally declared

  func search(text: String) -> Void
 {
    filterArray = arrayOfData.filter(){ (Container) -> Bool in
       let range = Container.name!.rangeOfString(text,   options:NSStringCompareOptions.CaseInsensitiveSearch) return range != nil }
       // then you are good to go 
 }

Answer 2

let arr1 = [10,20,40]
let e1 = arr1.enumerate()
let arr2 = ["a","b","c"]
let f1 = e1.filter { $0.element % 20 == 0 }
let f2 = arr2.enumerate().filter { j, _ in
    f1.contains { i, _ in
        i == j
    }
}

print(f1.map{$0.element}, f2.map{$0.element})
// [20, 40] ["b", "c"]

现在你有两个数组“已过滤”。最好的，你可以做的是重新设计你的数据模型！

过滤数组以与UISearchBar

2 个答案: