【发布时间】：2017-08-26 14:15:18
【问题描述】：
我有可以自动从 Firebase 数据库中提取文本的原型单元格。我也想将视频合并到其中。我将如何使用 AVPlayer 从 FireBase 数据库中的 URL 播放视频。我希望它尽可能自动化。
我不是一位经验丰富的开发人员，并且在此过程中遇到困难，因此请提供“婴儿级别”的答案。
这是从 firebase 提取的单元格的代码。
//
// FirebaseVidoes.swift
// Faces of the Holocaust Photographic History
//
// Created by New User on 8/25/17.
// Copyright © 2017 New User. All rights reserved.
//
import UIKit
import Firebase
import AVKit
import AVFoundation
struct postStruct {
let title : String!
let message : String!
//let image : UIImage!
}
class FirebaseVidoes: UITableViewController {
var posts = [postStruct]()
override func viewDidLoad() {
super.viewDidLoad()
tableView.backgroundView = UIImageView(image: UIImage(named:
"polandBackgroundBlur.jpg"))
let databaseRef = Database.database().reference()
databaseRef.child("Posts").queryOrderedByKey().observe(.childAdded,
with: {
snapshot in
let snapshotValue = snapshot.value as? NSDictionary
let title = snapshotValue?["title"] as? String
let message = snapshotValue?["message"] as? String
//let image = snapshotValue?["image"] as? UIImage
self.posts.insert(postStruct(title: title, message: message)
, at: 0)
self.tableView.reloadData()
})
//post()
// Do any additional setup after loading the view.
}
func post(){
let title = "Title"
let message = "Message"
let post : [String : AnyObject] = ["title": title as AnyObject,
"message": message as
AnyObject]
let databaseRef = Database.database().reference()
databaseRef.child("Posts").childByAutoId().setValue(post)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func tableView(_ tableView: UITableView,
numberOfRowsInSection section: Int) -> Int {
return posts.count
}
override func tableView(_ tableView: UITableView, cellForRowAt
indexPath: IndexPath) -> UITableViewCell {
var cell = tableView.dequeueReusableCell(withIdentifier: "Cell")
let label1 = cell?.viewWithTag(1) as! UILabel
label1.text = posts[indexPath.row].title
let label2 = cell?.viewWithTag(2) as! UILabel
label2.text = posts[indexPath.row].message
//let image1 = cell?.viewWithTag(3) as! UIImage
//image1.UIimage = posts[indexPath.row].image
return cell!
}
}
这里是 AVPlayer 代码：
// VideoTestViewController.swift
// Faces of the Holocaust Photographic History
//
// Created by New User on 8/26/17.
// Copyright © 2017 New User. All rights reserved.
//
import UIKit
import AVKit
import AVFoundation
class VideoTest: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
@IBAction func watchVideoDidClick(_ sender: Any) {
playExternalVideo()
}
let videoURL = "SOMEVIDEOURL"
func playExternalVideo(){
let videoURL = NSURL(string: self.videoURL)!
let player = AVPlayer(url: videoURL as URL)
let playerViewController = AVPlayerViewController()
playerViewController.player = player
self.present(playerViewController, animated: true) {
() -> Void in
playerViewController.player!.play()
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
如何合并这些以获取自动填充到单元格中的视频。
编辑这是修改后的代码
//Code Beginning
import UIKit
import Firebase
import AVKit
import AVFoundation
struct postStruct {
let title : String!
let message : String!
let url : URL!
//let image : UIImage!
}
类 FirebaseVidoes: UITableViewController {
var posts = [postStruct]()
override func viewDidLoad() {
super.viewDidLoad()
tableView.backgroundView = UIImageView(image: UIImage(named: "polandBackgroundBlur.jpg"))
let databaseRef = Database.database().reference()
databaseRef.child("Posts").queryOrderedByKey().observe(.childAdded, with: {
snapshot in
let snapshotValue = snapshot.value as? NSDictionary
let title = snapshotValue?["title"] as? String
let message = snapshotValue?["message"] as? String
let url = snapshotValue?["url"] as? URL
//let image = snapshotValue?["image"] as? UIImage
self.posts.insert(postStruct(title: title, message: message, url: url) , at: 0)
self.tableView.reloadData()
})
//post()
// Do any additional setup after loading the view.
}
/* func post(){
let title = "Title"
let message = "Message"
let post : [String : AnyObject] = ["title": title as AnyObject,
"message": message as AnyObject]
let databaseRef = Database.database().reference()
databaseRef.child("Posts").childByAutoId().setValue(post)
} */
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return posts.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
var cell = tableView.dequeueReusableCell(withIdentifier: "Cell")
let label1 = cell?.viewWithTag(1) as! UILabel
label1.text = posts[indexPath.row].title
let label2 = cell?.viewWithTag(2) as! UILabel
label2.text = posts[indexPath.row].message
//let image1 = cell?.viewWithTag(3) as! UIImage
//image1.UIimage = posts[indexPath.row].image
return cell!
}
func tableView(_tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
var selectedIndex = indexPath
let url = URL(string: "url")
let player = AVPlayer(url: url!)
let playerViewController = AVPlayerViewController()
playerViewController.player = player
self.present(playerViewController, animated: true) {
playerViewController.player!.play()
}
}
}
【问题讨论】：
-
您的意思是需要在单元格内播放视频吗？或者您希望它们在单独的屏幕上播放，使用 AVPlayer 控件（如停止、暂停、音量等）？
-
我都可以。我只是不知道如何开始。似乎有一个打开新视图的播放按钮会更容易，但我不知道。
标签： ios database firebase avplayer