swift中的模态视图控制器答案

【问题标题】：modalviewcontroller in swiftswift中的模态视图控制器
【发布时间】：2015-10-07 10:31:03
【问题描述】：

我有 VideoViewController.swift，当我按下按钮时，我想像这张照片一样在 secondviewcontroller 中播放视频（不是全屏）

我尝试使用模态视图控制器，但它不起作用.. 有什么问题？

这是源代码： VideoViewController.swift

import UIKit
import AVKit
import AVFoundation

class VideoViewController: UIViewController {

    @IBOutlet weak var AVPlayerView: UIView!

    override func shouldAutorotate() -> Bool {
        return false
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        // yoon // from web
        let sampleURL = NSURL(string: "http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4")!
        let player = AVPlayer(URL: sampleURL)


        let playerLayer = AVPlayerLayer(player: player)

        let videoWidth = 320
        let videoHeigh = 180
        let screenWidth = self.view.frame.size.width
        let screenHeigh = self.view.frame.size.height

        playerLayer.frame = CGRectMake(
            (screenWidth/2 - CGFloat(videoWidth/2)),
            (screenHeigh/2 - CGFloat(videoHeigh/2)),
            CGFloat(videoWidth),
            CGFloat(videoHeigh))

        AVPlayerView.layer.addSublayer(playerLayer)


       player.play()

        //AVPlayerView.backgroundColor = UIColor.blackColor()
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

}

视图控制器。快

import UIKit
import Social
import AVKit
import AVFoundation

class ViewController: UIViewController, SideBarDelegate {

    @IBOutlet weak var AVPlayerView: UIView!

    override func shouldAutorotate() -> Bool {
        return false
    }

    @IBAction func videoStream(sender: AnyObject) {


        self.modalTransitionStyle = UIModalTransitionStyle.CoverVertical
        // Cover Vertical is necessary for CurrentContext
        self.modalPresentationStyle = .CurrentContext
        // Display on top of    current UIView


        self.presentViewController(VideoViewController(), animated: true, completion: nil)
        //self.preferredContentSize = CGSizeMake(320, 200)
}

【问题讨论】：

您似乎正在使用 xib 或故事板，如果您需要从故事板/xib 加载，则必须使用相应的分配而不是 VideoViewController()。

标签： ios swift modalviewcontroller

【解决方案1】：

您的代码中有几个强制解包的选项。您需要确保在打开它们之前设置出口。以下将在第二个 vc 中播放视频，但您需要添加框架和其他您想要的东西。第一个vc很好，因为它是

import UIKit
import AVKit
import AVFoundation

class VideoViewController: AVPlayerViewController {

    @IBOutlet weak var AVPlayerView: UIView!

    override func shouldAutorotate() -> Bool {
        return false
    }

    private func playVideo() {
        player = AVPlayer(URL: NSURL(string: "http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4")!)
    }

    override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(animated)
        playVideo() 
    } 

}

【讨论】：