Question

我正在建立像这样的数组......

var vidRankArray = [String]()
var vidIdArray = [String]()
var vidTitleArray = [String]()
var vidDescriptionArray = [String]()
var vidImageArray = [String]()

返回解析信息并插入这样的信息......

override func viewWillAppear(animated: Bool)
    {
        let query = PFQuery(className: "UserVideos")
        query.whereKey("userObjectId", equalTo: PFUser.currentUser()!.objectId!)
        query.findObjectsInBackgroundWithBlock { (vid:Array?, error:NSError?) -> Void in
            if vid != nil
            {

                for items in vid!
                {
                    var i:Int
                    i = 0
                    if items["vid1"] != nil
                    {
                        if let myfav1 = items["vid1"] as? NSArray
                        {
                            let id = myfav1[0] as! String
                            let rank = myfav1[1] as! String
                            let title = myfav1[2] as! String
                            let description = myfav1[3] as! String
                            let image = myfav1[4] as! String
                            self.vidRankArray.insert(rank, atIndex: i)
                            self.vidIdArray.insert(id, atIndex: i)
                            self.vidTitleArray.insert(title, atIndex: i)
                            self.vidDescriptionArray.insert(description, atIndex: i)
                            self.vidImageArray.insert(image, atIndex: i)
                        }
                    }
                    if items["vid2"] != nil
                    {
                        if let myfav2 = items["vid2"] as? NSArray
                        {
                            let id = myfav2[0] as! String
                            let rank = myfav2[1] as! String
                            let title = myfav2[2] as! String
                            let description = myfav2[3] as! String
                            let image = myfav2[4] as! String
                            self.vidRankArray.insert(rank, atIndex: ++i)
                            self.vidIdArray.insert(id, atIndex: ++i)
                            self.vidTitleArray.insert(title, atIndex: ++i)
                            self.vidDescriptionArray.insert(description, atIndex: ++i)
                            self.vidImageArray.insert(image, atIndex: ++i)
                        }
                    }
                    if items["vid3"] != nil
                    {
                        if let myfav3 = items["vid3"] as? NSArray
                        {
                            let id = myfav3[0] as! String
                            let rank = myfav3[1] as! String
                            let title = myfav3[2] as! String
                            let description = myfav3[3] as! String
                            let image = myfav3[4] as! String
                            self.vidRankArray.insert(rank, atIndex: ++i)
                            self.vidIdArray.insert(id, atIndex: ++i)
                            self.vidTitleArray.insert(title, atIndex: ++i)
                            self.vidDescriptionArray.insert(description, atIndex: ++i)
                            self.vidImageArray.insert(image, atIndex: ++i)

                        }
                    }

我正在尝试按顺序在每个vid中插入每个元素。我有if item！= nil语句，这样如果没有特定的项目，可以跳过它。我在做这件事时遇到了麻烦。它会抛出索引错误或索引超出范围的数组。令人困惑，因为当我追加所有项目时，它工作得很完美。请给我任何想法。

******更新******* 我添加了这个......

for items in vid!
                {
                    for var i=0; i<vid!.count; ++i
                    {
                    if items["vid1"] != nil

现在我的控制台打印出来......

["2", "2", "1", "1"]
["3fy4cqWMhyI", "3fy4cqWMhyI", "TI0DGvqKZTI", "TI0DGvqKZTI"]
["Wonder Girls (원더걸스) - Be My Baby", "Wonder Girls (원더걸스) - Be My Baby", "EXO-K_중독(Overdose)_Music Video", "EXO-K_중독(Overdose)_Music Video"]
["Wonder Girls\' 2nd Album Title Song \"Be My Baby\" Copyrightⓒ 2011. JYP Entertainment. All Rights Reserved ▣ Wonder Girls 2nd Album Site ...", "Wonder Girls\' 2nd Album Title Song \"Be My Baby\" Copyrightⓒ 2011. JYP Entertainment. All Rights Reserved ▣ Wonder Girls 2nd Album Site ...", "The music video of EXO\'s \'Overdose\' is released! EXO is back with a new mini album with a more powerful performance that will make you \'overdose\' on their ...", "The music video of EXO\'s \'Overdose\' is released! EXO is back with a new mini album with a more powerful performance that will make you \'overdose\' on their ..."]
["https://i.ytimg.com/vi/3fy4cqWMhyI/default.jpg", "https://i.ytimg.com/vi/3fy4cqWMhyI/default.jpg", "https://i.ytimg.com/vi/TI0DGvqKZTI/default.jpg", "https://i.ytimg.com/vi/TI0DGvqKZTI/default.jpg"]

感觉我很亲近。任何想法，为什么它给我每个故障中的2个？

*******更新********

我得到了它的工作。我删除了var i = 0语句并使insertAtIndex显式化。当我肯定有vid1和vid2时它工作正常。我做了vid4并且它超出范围，因为它没有看到vid3或索引2.我怎样才能跳过它并简单地添加已保存的信息，即我试图用var i = 0完成的事情;一世

Answer 1

每次var i删除insert(variable, atIndex: index)，然后将其替换为append(variable)。你有完整的代码乱码，有时你会增加我，有时你不会。使用append()，您确定它会将您的项目附加到数组中，因此它将是最后一个，并且范围内的错误不会显示。

如何在多个数组的索引处保存多个元素？

1 个答案: