小编Rom*_*nko的帖子

请帮我AVPlayer.我需要在iPhone旋转时调整视频大小(横向).这是我的代码:

var player: AVPlayer?

override func viewDidLoad() {
    super.viewDidLoad()

    // Load the video from the app bundle.
    let videoURL: NSURL = NSBundle.mainBundle().URLForResource("bg_animate", withExtension: "3gp")!

    player = AVPlayer(URL: videoURL)
    player?.actionAtItemEnd = .None
    player?.muted = true

    let playerLayer = AVPlayerLayer(player: player)
    playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
    playerLayer.zPosition = -1
    playerLayer.frame = view.frame
    view.layer.addSublayer(playerLayer)
    player?.play()

    //loop video
    NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(ViewController.loopVideo), name: AVPlayerItemDidPlayToEndTimeNotification, object: nil)
}

但是字符串:

playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill

不起作用.

我还设置值AVLayerVideoGravityResize和AVLayerVideoGravityResizeAspect,但也有类似的结果...

我是Realm的新手,请你帮助我.我创建了模型:

class UserModel: Object {

    dynamic var email = ""
    dynamic var facebook_id = ""
    dynamic var google_id = ""
    dynamic var id = 0
    dynamic var name = ""
    dynamic var photo = ""
    dynamic var someinfo = ""
    dynamic var twitter_id = "" 

}

当我登录app时,我可以在UserProfileController上看到我的信息.我还有一个EditProfileController,我可以在其中更改有关我自己的一些信息.所以当我成功更改它时,我想更新我的Realm模型,并尝试这样做:

    let realm = try! Realm()

    try! realm.write {
        realm.create(UserModel.self, value: ["name": self.editEmail.text!, "email": self.editEmail.text!], update: true)
    }

但不幸的是我看到了这样的信息:

''UserModel' does not have a primary key and can not be updated'

如果我想同时更新一些房产怎么办？我可以用primaryKey做到这一点吗？或者......如何在没有primaryKey的情况下更新Realm模型？

我按照Apollo的安装教程进行操作.而且我完全相信我按照安装教程中的描述完成了所有工作.但是,在项目构建期间,我收到了编译器错误,如:

TypeError:无法读取未定义的属性"length"

at Object.yargs.command.command.command.argv [as handler] (/usr/local/lib/node_modules/apollo-codegen/src/cli.js:186:17)
at Object.runCommand (/usr/local/lib/node_modules/apollo- codegen/node_modules/yargs/lib/command.js:235:44)
at Object.parseArgs [as _parseArgs] (/usr/local/lib/node_modules/apollo-codegen/node_modules/yargs/yargs.js:1013:30)
at Object.get [as argv] (/usr/local/lib/node_modules/apollo-codegen/node_modules/yargs/yargs.js:957:21)
at Object.<anonymous> (/usr/local/lib/node_modules/apollo-codegen/lib/cli.js:197:5)
at Module._compile (module.js:660:30)
at Object.Module._extensions..js (module.js:671:10)
at Module.load (module.js:573:32)
at tryModuleLoad (module.js:513:12)
at Function.Module._load (module.js:505:3)

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命令/ bin/sh失败,退出代码为1

和

++ exec apollo-codegen生成--schema schema.json --output API.swift

TypeError:无法读取未定义的属性"length"

at Object.yargs.command.command.command.argv [as handler] (/usr/local/lib/node_modules/apollo-codegen/src/cli.js:186:17)
at Object.runCommand (/usr/local/lib/node_modules/apollo-codegen/node_modules/yargs/lib/command.js:235:44)
at Object.parseArgs [as _parseArgs] (/usr/local/lib/node_modules/apollo-codegen/node_modules/yargs/yargs.js:1013:30)
at Object.get [as argv] (/usr/local/lib/node_modules/apollo-codegen/node_modules/yargs/yargs.js:957:21)
at Object.<anonymous> (/usr/local/lib/node_modules/apollo-codegen/lib/cli.js:197:5)
at Module._compile (module.js:652:30)
at Object.Module._extensions..js …

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我有一个方法:

func followUnfollow(followIcon: UIImageView, channelId: String) {
    let followUnfollow = followIcon
    let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.followIconTapped(_:)))
    followUnfollow.userInteractionEnabled = true
    followUnfollow.addGestureRecognizer(tapGestureRecognizer)
}

而且我有一个方法:

func followIconTapped(sender: UITapGestureRecognizer) {
    ...
}

它的工作正常.但我需要传递channelId给followIconTapped()方法.

我试试这个:

func followUnfollow(followIcon: UIImageView, channelId: String) {
    ...
    let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.followIconTapped(_:channelId)))
    ...
}

然后我尝试抓住它:

func followIconTapped(sender: UITapGestureRecognizer, channelId: String) {
    ...
}

xCode说channelId永远不会使用.为什么？当我构建项目时,我没有任何问题.但是,如果我点击followIcon, app就会崩溃.

拜托,你可以给我建议如何在传递channelId到followIconTapped()