ios - 如何在使用 swift 单击按钮时解析 youtubeURL 以从 parse.com 加载视频

Question

我正在尝试在我的 swift 项目中找到从解析数据库加载视频的最佳方法。我的数据库中有一个名为 ProductVideo 的列，其中包含视频的 url。我的项目在表格 View 中有一个产品列表，当推送其中一个单元格时，它会将您带到一个新的 View Controller ，其中显示有关的信息该项目中有一个名为视频的按钮，我想在单击时加载视频。这是我用于打开对象并显示信息的代码。对此提供一些帮助将不胜感激!

@IBOutlet weak var videoView: UIView!
@IBOutlet weak var videoStatus: UILabel!
@IBOutlet weak var productVideo: UIButton!
@IBOutlet weak var productCategory: UILabel!
@IBOutlet weak var ProductImage: PFImageView!
@IBOutlet weak var productName: UILabel!
@IBOutlet weak var productDescription: UITextView!



override func viewDidLoad() {
    super.viewDidLoad()


    // Unwrap the current object object
    if let object = currentObject {
        productName.text = object["ProductName"] as? String
        productDescription.text = object["ProductDescription"] as! String
        productCategory.text = object["ProductCategory"] as? String
        videoStatus.text = object["VideoStatus"] as? String



        var initialThumbnail = UIImage(named: "question")
        ProductImage.image? = initialThumbnail!
        if let thumbnail = object["ProductImage"] as? PFFile {
            ProductImage.file = thumbnail
            ProductImage.loadInBackground()


            if self.videoStatus.text == "None"
            {
                self.productVideo.hidden = true
                self.videoView.hidden = true
            }


    }



    }





}

vvv这是在Tableview Controller 中..^^^^上面的代码来自productViewController

//override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath, object: PFObject?) -> PFTableViewCell {

    var cell = tableView.dequeueReusableCellWithIdentifier("Cell") as! CustomCell!
    if cell == nil {
        cell = CustomCell(style: UITableViewCellStyle.Default, reuseIdentifier: "Cell")
    }

    // Extract values from the PFObject to display in the table cell
    if let ProductName = object?["ProductName"] as? String {
        cell.ProductName.text = ProductName
    }


    // Display product image
    var initialThumbnail = UIImage(named: "question")
    cell.ProductImage.image? = initialThumbnail!
    if let thumbnail = object?["ProductImage"] as? PFFile {
        cell.ProductImage.file = thumbnail
        cell.ProductImage.loadInBackground()
    }



    return cell
}

将其添加到 View Controller

@IBAction func productVideo2(sender: AnyObject) {


    let videoWebView = UIWebView(frame: CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height))

    let url = object["ProductVideo"] as! String // GET THIS FROM YOUR PARSE OBJECT

    let urlRequest = NSURLRequest(URL: NSURL(string: url)!)

    videoWebView.loadRequest(urlRequest)
    self.view.addSubview(videoWebView)


}

Answer 1

根据您的代码，将如下完成:

override func viewDidLoad() {
super.viewDidLoad()


// Unwrap the current object object
if let object = currentObject {
    productName.text = object["ProductName"] as? String
    productDescription.text = object["ProductDescription"] as! String
    productCategory.text = object["ProductCategory"] as? String
    videoStatus.text = object["VideoStatus"] as? String



    var initialThumbnail = UIImage(named: "question")
    ProductImage.image? = initialThumbnail!
    if let thumbnail = object["ProductImage"] as? PFFile {
        ProductImage.file = thumbnail
        ProductImage.loadInBackground()


        if self.videoStatus.text == "None"
        {
            self.productVideo.hidden = true
            self.videoView.hidden = true
        } else {


        let videoWebView = UIWebView(frame: CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height))

    let url = object["ProductVideo"] as! String // GET THIS FROM YOUR PARSE OBJECT

    let urlRequest = NSURLRequest(URL: NSURL(string: url)!)

    videoWebView.loadRequest(urlRequest)
    self.view.addSubview(videoWebView)

    }


}



}





}

更新

要按照您的意愿使用它，您需要创建一个自定义 UIButton 子类，其中包含一个属性来保存 cellForRowAtIndexPath 方法中存在的视频 Url

Storyboard

请注意右侧类检查器中的自定义 UITableViewCell 和自定义 UIButton 类分配。

UIButton 子类示例

import UIKit

class MyCustomButton: UIButton {

    var videoUrl = ""

}

UITableViewCell 子类示例

import UIKit

class MyCustomTableViewCell: UITableViewCell {

@IBOutlet weak var cellBttn: MyCustomButton!

override func awakeFromNib() {
    super.awakeFromNib()
    // Initialization code
}

override func setSelected(selected: Bool, animated: Bool) {
    super.setSelected(selected, animated: animated)

    // Configure the view for the selected state
}

}

View Controller 示例

import UIKit

class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {

//MARK: - ivars
var myData = ["One","Two","Three","Four","Five"] // Really just where your video URL is in your code

//MARK: - Overrides
override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
}

//MARK: - UITableViewMethods
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

    return myData.count
}

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

    let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! MyCustomTableViewCell

    cell.cellBttn.videoUrl = myData[indexPath.row]

    cell.cellBttn.addTarget(self, action: Selector("cellBttnTouched:"), forControlEvents: UIControlEvents.TouchUpInside)

    return cell

}

//MARK: - Actions
func cellBttnTouched(sender: MyCustomButton) {

    // Spawn your UIWebView here, you can get current video URL from the sender

    let thisCellsVideoUrl = sender.videoUrl
    println(thisCellsVideoUrl)


}

}

此示例在点击按钮时产生以下输出: