小编Fab*_*gue的帖子

我遇到了问题,如果我尝试打印var我有时会得到一个"可选("var")"如果我尝试登录或打印到标签,但是当我没有得到它.

看这里

ViewController.swift

import UIKit
class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        NSUserDefaults.standardUserDefaults().setObject("notWorking", forKey: "testvar")
        NSUserDefaults.standardUserDefaults().synchronize()
        println(NSUserDefaults.standardUserDefaults().stringForKey("testvar"))
        var test = "working"
        println(test)
    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
}

有人可以解释这个"可选"出现的时间及其用途吗？我怎么能删除它？

将我的代码更新为swift 1.2后,我坚持了一点

var Question:String!
var Answere:String!
var Answeres:[String]!
var ObjectIDsArray:[String]!
var ButtonNumber:String!
var ObjectIDsArrayCount:Int!


var query : PFQuery = PFQuery(className: "AddonQuiz")
        query.getObjectInBackgroundWithId(QuestionID){
            (ObjectHolder : PFObject?, error : NSError?) -> Void in

            if error == nil {

                self.Question = ObjectHolder["ImageLink"] as! String
                self.Answeres = ObjectHolder["Answeres"] as! Array
                self.Answere = ObjectHolder["Right"] as! String




                if self.Answeres.count > 0 {

随着错误

Cannot assign a value of type 'AnyObject?' to a value of type 'String!'
Cannot assign a value of type 'AnyObject?' to a value …

我有一个用于在a中显示不同PDF文件的视图UIWebView,这将UIWebView加载PDF文件,NSData如:

webView.loadData(pdfData, MIMEType: "application/pdf", textEncodingName: "utf-8", baseURL: NSURL())

现在有一些PDF文件需要通过UIButton 上面的旋转UIWebView,有没有办法旋转PDF里面的UIWebView？

到目前为止我做了什么尝试

webView.transform = CGAffineTransformMakeRotation(CGFloat(M_PI_2))

但这并没有让我得到我想要的结果.

播放视频后,我尝试让我的视频播放器关闭.

 func playVideoPepper() {

        var maxVideoCount:Int =  5 //AnzahlderVideos
        var Random = Int(arc4random_uniform(maxVideoCount + 0))
        var VideoNumber = Random + 1


        let path = NSBundle.mainBundle().pathForResource("pepper\(VideoNumber)", ofType:"mp4")
        let url = NSURL.fileURLWithPath(path!)
        moviePlayer = MPMoviePlayerController(contentURL: url)
        if let player = moviePlayer {
            player.view.frame = self.view.bounds
            player.prepareToPlay()
            player.scalingMode = .AspectFill
            player.controlStyle = .None
            self.view.addSubview(player.view)
            var time = player.duration
            println(time)
        }

    }

我尝试用.duration或.playableduration来获取其中一个视频(随机播放5个视频)的时间,但是两个都给我一个0.00是否有任何简单的方法可以在播放视频时删除SubView？

我通过Swift在tvOS中创建了一个UIButton

let randomBtn = UIButton()
randomBtn.setTitle("Zufällig", forState: .Normal)
let RndNormal = UIImage(named: "RndNormal")
let RndHoover = UIImage(named: "RndHoover")
randomBtn.setImage(RndNormal, forState: .Normal)
randomBtn.setImage(RndHoover, forState: .Focused)
randomBtn.setTitleColor(UIColor.blackColor(), forState: .Normal)
randomBtn.setTitleColor(UIColor.whiteColor(), forState: .Focused)

randomBtn.addTarget(self, action: #selector(ViewController.click(_:)), forControlEvents: UIControlEvents.TouchUpInside)

let screenSize: CGRect = UIScreen.mainScreen().bounds
let screenWidth = screenSize.width
randomBtn.frame = CGRect(x: screenWidth - 150, y: 60 , width: 70 , height: 70)
self.view.addSubview(randomBtn)

但如果按下按钮,动作永远不会被解雇,tvOS有什么不同吗？

func click(sender: UIButton) {
    print("click")
}

我尝试在swift中为我的MKPointAnnotation创建一个自定义的"badget",但它失败了,因为MKPointAnnotation没有像图像那样的任何属性

 var information = MKPointAnnotation()
    information.coordinate = location 
    information.title = "Test Title!"
    information.subtitle = "Subtitle"
    information.image = UIImage(named: "dot.png") //this is the line whats wrong
    Map.addAnnotation(information)

有人想出了一个快速的解决方案吗？

我目前遇到了完全的挫折,因为我找不到任何错误,但我的ActionSheet在iPad上崩溃但在iPhone上运行良好这里是动作的代码

if (view.annotation.title as String!) == "San Francisco" {

                currentLat = 37.615223
                    currentLong = -122.389977

                url = "www.google.de"

                let action:UIActionSheet = UIActionSheet(title: "Change Map Type", delegate: self, cancelButtonTitle: "Back", destructiveButtonTitle: nil, otherButtonTitles: "Product Page", "Video")
                action.showInView(self.view)
                action.tag = 0
                VideoID = "XXXXXX"


            }

所以应该处理的行动是

if actionSheet.tag == 0{
            if buttonIndex == 1{ performSegueWithIdentifier("showShop", sender: self) }
            if buttonIndex == 2{ UIApplication.sharedApplication().openURL(NSURL(string: "http://www.youtube.com/watch?v=\(youtubeVideoID)")) }
            //if buttonIndex == 2{ performSegueWithIdentifier("showYoutube", sender: self) }

        }

Youtube可以在iPhone和iPad上运行良好,"showShop"在iPhone上运行良好但在iPad上运行不正常

"showShop"向前看我的ViewControllerShopView看起来像

import UIKit

class ViewControllerShopView: UIViewController { …

在我的测验的下一个问题要加载之前,我试着让按钮"摇晃".

动画看起来像

var timer = NSTimer()
    UIView.animateWithDuration(0.1, animations: {
        self.IMGVIEWcat.center = CGPointMake(self.IMGVIEWcat.center.x + 2, self.IMGVIEWcat.center.y)
    })
    UIView.animateWithDuration(0.2, animations: {
        self.IMGVIEWcat.center = CGPointMake(self.IMGVIEWcat.center.x - 4, self.IMGVIEWcat.center.y)
    })
    UIView.animateWithDuration(0.3, animations: {
            self.IMGVIEWcat.center = CGPointMake(self.IMGVIEWcat.center.x + 2, self.IMGVIEWcat.center.y)
    })

在此之后调用以下函数

    func QueryInformations(){
        println("QueryInformationsStart")
        self.ActivityIndicator.hidden = false
        ObjectIDsArrayCount = ObjectIDsArray.count
        var RandomQuestion = Int(arc4random_uniform(ObjectIDsArray.count + 0))
        var QuestionID:String = ObjectIDsArray[RandomQuestion]
        var query : PFQuery = PFQuery(className: "AddonQuiz")
        query.getObjectInBackgroundWithId(QuestionID){
            (ObjectHolder : PFObject!, error : NSError!) -> Void in
...

现在动画开始但是下一个问题加载即时,是否有一些容易等待初学者实现"等待"直到动画完成？

我试着设定

var complet == true …

我只是第一次尝试使用NMSSH，但是对我来说它根本无法连接

import UIKit
import NMSSH

class ViewController: UIViewController {

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

        let session = NMSSHSession(host: "11.111.11.11", andUsername: "vnc")
        if session.connected == true{
            session.authenticateByPassword("1234")
            if session.authorized == true {
                print("works")
            }
        }

    }


}

我想在体内添加一个应该自动播放的视频(本地视频)任何简单的解决方案吗？

<!DOCTYPE html>
<html>
    <head>
        <link href="fuctions/style.css" rel="stylesheet" media="screen" type="text/css" />
        <script type="text/javascript" charset="utf-8" src="fuctions/cordova-2.3.0.js"></script>
        <script type="text/javascript" charset="utf-8" src="fuctions/functions.js"></script>
    </head>
<body onload="onBodyLoad()">
    <script type="text/javascript">
        checkFirstRun();
    </script>
</body>
</html>

我试图得到一个随机数,并且如果它超过另一个数字则具有while结尾:

int main() // random
{
    int x= 50;
    int i;

    while (i>x){
        srand(time(0));
        int i = rand() %100;
        printf("laenge %d", i);
    }
}

同时开始很好并产生不同的数字(如1.000倍11,1.000倍75 ......)但它永远不会结束.

我有2个问题,为什么不结束？为什么它会在控制台中获得相同随机数的1.000倍,然后是下一个随机数的1.000倍？

如果我添加:

int main() // random
{
    int x= 50;
    int i;

    while (i>x){
        srand(time(0));
        int i = rand() %100;
        printf("laenge %d", i);
        sleep(1);
    }
}

睡眠(1); 整个代码不再起作用了.

我有一个mapView自定义注释.我还添加了一个按钮,但有没有办法看到按下按钮的注释？

因此,控制台的帖子不仅应该是"Disclosure Pressed!".我需要像"Disclosure Pressed!info(X) .subtitle"这样的内容来查看用户录制的info1或info2.

这是代码:

import UIKit
import MapKit

class ViewController: UIViewController, MKMapViewDelegate {

    @IBOutlet weak var Map: MKMapView!

    class CustomPointAnnotation: MKPointAnnotation {
        var imageName: String!
    }

    @IBAction func btpressed(sender: AnyObject) {

    }

    override func viewDidLoad() {
        super.viewDidLoad()
        //1
        var lat1:CLLocationDegrees = 40.748708
        var long1:CLLocationDegrees = -73.985643
        var latDelta1:CLLocationDegrees = 0.01
        var longDelta1:CLLocationDegrees = 0.01

        var span1:MKCoordinateSpan = MKCoordinateSpanMake(latDelta1, longDelta1)
        var location1:CLLocationCoordinate2D = CLLocationCoordinate2DMake(lat1, long1)
        var region1:MKCoordinateRegion = MKCoordinateRegionMake(location1, span1)

        Map.setRegion(region1, animated: true)

        var info1 = …

目前我尝试设置一个只播放视频的小应用程序(仅适用于我的女儿),但它总是在"路径"上崩溃

import UIKit
import MediaPlayer

var moviePlayer : MPMoviePlayerController?

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        playVideo()
    }

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


    func playVideo() {

        let path = NSBundle.mainBundle().pathForResource("video", ofType:"mp4")
        let url = NSURL.fileURLWithPath(path!)
        moviePlayer = MPMoviePlayerController(contentURL: url)
        if let player = moviePlayer {
            player.view.frame = self.view.bounds
            player.prepareToPlay()
            player.scalingMode = .AspectFill
            self.view.addSubview(player.view)
        }
    }

}

崩溃发生在这里 let path = NSBundle.mainBundle().pathForResource("video", ofType:"mp4")

致命错误:在解包可选值时意外发现nil导致路径为空