arrays - 如何使用 Swift3 删除 Array 中的特定 NSObject

Question

我用 friend 的联系信息制作了表格 View 。
如果触摸每个单元格都有按钮，
我想将信息插入到选定的 friend 数组
(通过数组，我又做了一个小 View 与好友列表一起向上滑动)。
但是，如果再按一次按钮，
我想删除所选好友数组中的好友信息。
我知道如何附加到数组，
但我不知道如何删除数组中的特定项目(NSObject)
通过不使用索引。

我的源代码如下

class FriendModel : NSObject {
   dynamic var index : ""
   dynamic var thumbnail : ""
   dynamic var name : "" 

}

在 View Controller 类中，

  var selectedList = [FriendModel]()

@IBAction func SelectAct(_ sender: Any) {

    let chooseBtn = sender as! UIButton

    let indexPath = NSIndexPath(row: chooseBtn.tag, section:0)
    let cell = tableView.cellForRow(at: indexPath as IndexPath) as! FriendsListSendCell

    // when selected button is pushed
    if chooseBtn.isSelected == true {
        chooseBtn.isSelected = false
        count = count! - 1

        if self.count! < 1 {
            self.windowShowUp = false
            UIView.animate(withDuration: 0.1, delay: 0.1, options: [], animations:{self.selectedBoard.center.y += 80 }, completion: nil)
            self.checkNumLabel.text = ""
        }else{

        }
     //////////////////////////here////////////////////////////  
     //////////////////how to erase the FriendModel(NSObject) in selectedList.

    }
    //when the unselected button is pushed 
    else {

        //instance for append the friend info
        let friendInfo = FriendModel()


        chooseBtn.isSelected = true
        count = count! + 1

        friendInfo.thumbnail = cell.thumbnail
        friendInfo.name = cell.nameLabel.text!

        //add friend info to selectedList
        self.selectedList.append(friendInfo)
        print("\(self.selectedList)")



        if self.windowShowUp! == false{
            self.windowShowUp = true
            UIView.animate(withDuration: 0.1, delay: 0.1, options: [], animations:{self.selectedBoard.center.y -= 80 }, completion: nil)

        }else{

        }

    }
}

Answer 1

您可以使用index(where:)获取对象的索引，然后 remove索引位置的项目。

class FriendModel {
    var index = ""
    var thumbnail = ""
    var name = ""
}

let fm0 = FriendModel()
fm0.index = "100"
fm0.thumbnail = "tell.png"
fm0.name = "Phillips"

let fm1 = FriendModel()
fm1.index = "200"
fm1.thumbnail = "ask.png"
fm1.name = "Allen"

var array = [FriendModel]()
array.append(fm0)
array.append(fm1)

// The index below is an index of the array. Do not confuse with the FriendModel.index
let index = array.index {
    return $0.thumbnail == "ask.png" && $0.name == "Allen"
}
array.forEach { print($0.name) }

print("Array index:", index ?? "n/a")

array.remove(at: index!)

array.forEach { print($0.name) }