Ios 正在尝试为“在收藏夹列表中添加项目”创建收藏夹按钮

我正在尝试在CollectionViewCell上创建收藏按钮，用于保存收藏列表中的项目。当我点击favorite图标按钮时，它成功地将选定的单元格项添加到favorite list类的数组中，并显示在favorite list中。当我点击“收藏夹”按钮时，它会根据是否已保存的值更改其图像。 当我试图在NSUserDefaults中保存收藏夹列表数组时，它会在检索时保存并显示值。但当我从模拟器关闭我的应用程序并再次运行时，它不会显示我保存在NSUserDefaults中的favorite列表数组中的值，并且还希望根据是否已添加的项设置按钮图像状态

当我点击收藏夹时。并在关闭我的应用程序后再次运行。 谁能告诉我怎样才能解决这个问题。或者谁能帮我把它修好 谢谢

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我已经检查了你的样本项目，我做了一个小的改变，现在它的工作良好

override func viewWillAppear(animated: Bool) {
    collectionView.reloadData()
    //You have check for availablity of favorute item before adding to userdefault 
    if u.count > 0 {
        NSUserDefaults.standardUserDefaults().setObject(u, forKey: "u")
        NSUserDefaults.standardUserDefaults().setObject(i, forKey: "i")
        NSUserDefaults.standardUserDefaults().synchronize()
    }


    uV = NSUserDefaults.standardUserDefaults().arrayForKey("u")!
    iV = NSUserDefaults.standardUserDefaults().arrayForKey("i")!
    print("uV values.. \(uV)")
    print("iV values.. \(iV)")
}

在将对象添加到Userdefault之前，请检查其可用性。现在它工作正常。请尝试一下，并让我知道响应

编辑： 我已经编辑了你的代码，现在它工作得很好，我听到的列表中列出了我所做的所有更改

在LiveCollectionView.swift中：

在viewdidload中声明两个对象和：

  var MutableArray:NSMutableArray!
  let defaults = NSUserDefaults.standardUserDefaults()


  override func viewDidLoad() {
     super.viewDidLoad()

      MutableArray = NSMutableArray()
      if let HaveUrl = defaults.objectForKey("u"){
         u = HaveUrl.mutableCopy() as! [NSString]
      }
      if let HaveImage = defaults.objectForKey("i"){
         i = HaveImage.mutableCopy() as! [NSString]
      }


     if let CheckAvailability = defaults.objectForKey("Fav_Unfav"){
        MutableArray = CheckAvailability.mutableCopy() as! NSMutableArray
     }else{
     for var Check in image {
        print(Check)
        MutableArray.addObject("wHeart")
     }
  }
}

cellForItemAtIndexPath:

//Add this New Line
cell.heartBt.setImage(UIImage(named: MutableArray[indexPath.row] as! String), forState: UIControlState.Normal)

LiveCollectionViewCell.swift:

 class LiveCollectionViewCell: UICollectionViewCell{

 var showPlayButton = true

 var number = Int()
 var secondNumber = Int()

 @IBOutlet weak var playBt: UIButton!

 @IBOutlet weak var imageView: UIImageView!

 @IBOutlet weak var heartBt: UIButton!

 @IBAction func heartBt(sender: UIButton) {


var btn : NSInteger
btn = sender.tag as NSInteger

let uValues = url[btn]
let iValues = image[btn]

if MutableArray[btn] as! String == "rheart" {
    showPlayButton = false
}

if showPlayButton == true{
    //Add this Line
    MutableArray.replaceObjectAtIndex(btn, withObject: "rheart")

    u.append(url[btn])
    i.append(image[btn])
    self.heartBt.setImage(UIImage(named: "rheart"), forState: UIControlState.Normal)
    showPlayButton = false
    print("rHeart xxxxxxxxxxxxxxx")

}else{
    //Add this Line
    MutableArray.replaceObjectAtIndex(btn, withObject: "wHeart")

    for check in u {

        number++
        print(number)

        if uValues == check{
            print(u)
            u.removeAtIndex(number-1)
            number = 0
            print("RemoVe at indext path")
            print(u)

            break

        }

    }

    for check2 in i{

        secondNumber++
        print(secondNumber)

        if iValues == check2{
            print(i)
            i.removeAtIndex(secondNumber-1)
            secondNumber = 0
            print("RemoVe at indext path")
            print(i)
            self.heartBt.setImage(UIImage(named: "wHeart"), forState: UIControlState.Normal)
            showPlayButton = true
            print("wHeart ........")
            break

        }

    }

}
   //Set the array to userdefault
    defaults.setObject(MutableArray, forKey: "Fav_Unfav")
    defaults.setObject(u, forKey: "u")
    defaults.setObject(i, forKey: "i")

    defaults.synchronize()
   }
}

override func viewWillAppear(animated: Bool) {
   collectionView.reloadData()

   if let CheckURL = defaults.objectForKey("u") {
     uV = CheckURL.mutableCopy() as! NSArray
   }

   if let CheckImage = defaults.objectForKey("i"){
     iV = CheckImage.mutableCopy() as! NSArray
   }

   print("uV values.. \(uV)")
   print("iV values.. \(iV)")
}

FavoriteTvViewController.swift:

 class LiveCollectionViewCell: UICollectionViewCell{

 var showPlayButton = true

 var number = Int()
 var secondNumber = Int()

 @IBOutlet weak var playBt: UIButton!

 @IBOutlet weak var imageView: UIImageView!

 @IBOutlet weak var heartBt: UIButton!

 @IBAction func heartBt(sender: UIButton) {


var btn : NSInteger
btn = sender.tag as NSInteger

let uValues = url[btn]
let iValues = image[btn]

if MutableArray[btn] as! String == "rheart" {
    showPlayButton = false
}

if showPlayButton == true{
    //Add this Line
    MutableArray.replaceObjectAtIndex(btn, withObject: "rheart")

    u.append(url[btn])
    i.append(image[btn])
    self.heartBt.setImage(UIImage(named: "rheart"), forState: UIControlState.Normal)
    showPlayButton = false
    print("rHeart xxxxxxxxxxxxxxx")

}else{
    //Add this Line
    MutableArray.replaceObjectAtIndex(btn, withObject: "wHeart")

    for check in u {

        number++
        print(number)

        if uValues == check{
            print(u)
            u.removeAtIndex(number-1)
            number = 0
            print("RemoVe at indext path")
            print(u)

            break

        }

    }

    for check2 in i{

        secondNumber++
        print(secondNumber)

        if iValues == check2{
            print(i)
            i.removeAtIndex(secondNumber-1)
            secondNumber = 0
            print("RemoVe at indext path")
            print(i)
            self.heartBt.setImage(UIImage(named: "wHeart"), forState: UIControlState.Normal)
            showPlayButton = true
            print("wHeart ........")
            break

        }

    }

}
   //Set the array to userdefault
    defaults.setObject(MutableArray, forKey: "Fav_Unfav")
    defaults.setObject(u, forKey: "u")
    defaults.setObject(i, forKey: "i")

    defaults.synchronize()
   }
}

override func viewWillAppear(animated: Bool) {
   collectionView.reloadData()

   if let CheckURL = defaults.objectForKey("u") {
     uV = CheckURL.mutableCopy() as! NSArray
   }

   if let CheckImage = defaults.objectForKey("i"){
     iV = CheckImage.mutableCopy() as! NSArray
   }

   print("uV values.. \(uV)")
   print("iV values.. \(iV)")
}

---

我已经检查了你的样本项目，我做了一个小的改变，现在它的工作良好

override func viewWillAppear(animated: Bool) {
    collectionView.reloadData()
    //You have check for availablity of favorute item before adding to userdefault 
    if u.count > 0 {
        NSUserDefaults.standardUserDefaults().setObject(u, forKey: "u")
        NSUserDefaults.standardUserDefaults().setObject(i, forKey: "i")
        NSUserDefaults.standardUserDefaults().synchronize()
    }


    uV = NSUserDefaults.standardUserDefaults().arrayForKey("u")!
    iV = NSUserDefaults.standardUserDefaults().arrayForKey("i")!
    print("uV values.. \(uV)")
    print("iV values.. \(iV)")
}

在将对象添加到Userdefault之前，请检查其可用性。现在它工作正常。请尝试一下，并让我知道响应

编辑： 我已经编辑了你的代码，现在它工作得很好，我听到的列表中列出了我所做的所有更改

在LiveCollectionView.swift中：

在viewdidload中声明两个对象和：

  var MutableArray:NSMutableArray!
  let defaults = NSUserDefaults.standardUserDefaults()


  override func viewDidLoad() {
     super.viewDidLoad()

      MutableArray = NSMutableArray()
      if let HaveUrl = defaults.objectForKey("u"){
         u = HaveUrl.mutableCopy() as! [NSString]
      }
      if let HaveImage = defaults.objectForKey("i"){
         i = HaveImage.mutableCopy() as! [NSString]
      }


     if let CheckAvailability = defaults.objectForKey("Fav_Unfav"){
        MutableArray = CheckAvailability.mutableCopy() as! NSMutableArray
     }else{
     for var Check in image {
        print(Check)
        MutableArray.addObject("wHeart")
     }
  }
}

cellForItemAtIndexPath:

//Add this New Line
cell.heartBt.setImage(UIImage(named: MutableArray[indexPath.row] as! String), forState: UIControlState.Normal)

LiveCollectionViewCell.swift:

 class LiveCollectionViewCell: UICollectionViewCell{

 var showPlayButton = true

 var number = Int()
 var secondNumber = Int()

 @IBOutlet weak var playBt: UIButton!

 @IBOutlet weak var imageView: UIImageView!

 @IBOutlet weak var heartBt: UIButton!

 @IBAction func heartBt(sender: UIButton) {


var btn : NSInteger
btn = sender.tag as NSInteger

let uValues = url[btn]
let iValues = image[btn]

if MutableArray[btn] as! String == "rheart" {
    showPlayButton = false
}

if showPlayButton == true{
    //Add this Line
    MutableArray.replaceObjectAtIndex(btn, withObject: "rheart")

    u.append(url[btn])
    i.append(image[btn])
    self.heartBt.setImage(UIImage(named: "rheart"), forState: UIControlState.Normal)
    showPlayButton = false
    print("rHeart xxxxxxxxxxxxxxx")

}else{
    //Add this Line
    MutableArray.replaceObjectAtIndex(btn, withObject: "wHeart")

    for check in u {

        number++
        print(number)

        if uValues == check{
            print(u)
            u.removeAtIndex(number-1)
            number = 0
            print("RemoVe at indext path")
            print(u)

            break

        }

    }

    for check2 in i{

        secondNumber++
        print(secondNumber)

        if iValues == check2{
            print(i)
            i.removeAtIndex(secondNumber-1)
            secondNumber = 0
            print("RemoVe at indext path")
            print(i)
            self.heartBt.setImage(UIImage(named: "wHeart"), forState: UIControlState.Normal)
            showPlayButton = true
            print("wHeart ........")
            break

        }

    }

}
   //Set the array to userdefault
    defaults.setObject(MutableArray, forKey: "Fav_Unfav")
    defaults.setObject(u, forKey: "u")
    defaults.setObject(i, forKey: "i")

    defaults.synchronize()
   }
}

override func viewWillAppear(animated: Bool) {
   collectionView.reloadData()

   if let CheckURL = defaults.objectForKey("u") {
     uV = CheckURL.mutableCopy() as! NSArray
   }

   if let CheckImage = defaults.objectForKey("i"){
     iV = CheckImage.mutableCopy() as! NSArray
   }

   print("uV values.. \(uV)")
   print("iV values.. \(iV)")
}

FavoriteTvViewController.swift:

 class LiveCollectionViewCell: UICollectionViewCell{

 var showPlayButton = true

 var number = Int()
 var secondNumber = Int()

 @IBOutlet weak var playBt: UIButton!

 @IBOutlet weak var imageView: UIImageView!

 @IBOutlet weak var heartBt: UIButton!

 @IBAction func heartBt(sender: UIButton) {


var btn : NSInteger
btn = sender.tag as NSInteger

let uValues = url[btn]
let iValues = image[btn]

if MutableArray[btn] as! String == "rheart" {
    showPlayButton = false
}

if showPlayButton == true{
    //Add this Line
    MutableArray.replaceObjectAtIndex(btn, withObject: "rheart")

    u.append(url[btn])
    i.append(image[btn])
    self.heartBt.setImage(UIImage(named: "rheart"), forState: UIControlState.Normal)
    showPlayButton = false
    print("rHeart xxxxxxxxxxxxxxx")

}else{
    //Add this Line
    MutableArray.replaceObjectAtIndex(btn, withObject: "wHeart")

    for check in u {

        number++
        print(number)

        if uValues == check{
            print(u)
            u.removeAtIndex(number-1)
            number = 0
            print("RemoVe at indext path")
            print(u)

            break

        }

    }

    for check2 in i{

        secondNumber++
        print(secondNumber)

        if iValues == check2{
            print(i)
            i.removeAtIndex(secondNumber-1)
            secondNumber = 0
            print("RemoVe at indext path")
            print(i)
            self.heartBt.setImage(UIImage(named: "wHeart"), forState: UIControlState.Normal)
            showPlayButton = true
            print("wHeart ........")
            break

        }

    }

}
   //Set the array to userdefault
    defaults.setObject(MutableArray, forKey: "Fav_Unfav")
    defaults.setObject(u, forKey: "u")
    defaults.setObject(i, forKey: "i")

    defaults.synchronize()
   }
}

override func viewWillAppear(animated: Bool) {
   collectionView.reloadData()

   if let CheckURL = defaults.objectForKey("u") {
     uV = CheckURL.mutableCopy() as! NSArray
   }

   if let CheckImage = defaults.objectForKey("i"){
     iV = CheckImage.mutableCopy() as! NSArray
   }

   print("uV values.. \(uV)")
   print("iV values.. \(iV)")
}

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