Swift 如何在if和else if内部创建变量成为全局变量？_Swift_If Statement_Uicollectionview_Global Variables

Swift 如何在if和else if内部创建变量成为全局变量？

swift if-statement

Swift 如何在if和else if内部创建变量成为全局变量？,swift,if-statement,uicollectionview,global-variables,Swift,If Statement,Uicollectionview,Global Variables,我有集合视图，但目前仍使用某些字符串的变量： func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell { var urlku = NSURL(string: "http://json.comli.com/example.json") var data = NSData(content

我有集合视图，但目前仍使用某些字符串的变量：

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
    var urlku = NSURL(string: "http://json.comli.com/example.json")
    var data = NSData(contentsOfURL: urlku!)
    if let json: NSDictionary = NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.MutableContainers, error: nil) as? NSDictionary {
        if let dict = json as? [String: AnyObject] {
            println(dict)
            if let weatherDictionary = dict["data"]! as? [AnyObject] {
                println("\nWeather dictionary:\n\n\(weatherDictionary)")
                if let descriptionString = weatherDictionary[0]["challengeName"]! as? String {
                    println("\nDescription of the weather is: \(descriptionString)")
                    var judul1 = "\(descriptionString)"
                }else if let descriptionString1 = weatherDictionary[1]["challengeName"]! as? String {
                    println("\nDescription of the weather is: \(descriptionString1)")
                    var judul2 = "\(descriptionString1)"
                }else if let descriptionString2 = weatherDictionary[1]["currentPhaseName"]! as? String {
                    println("\nDescription of the weather is: \(descriptionString2)")
                    var judul3 = "\(descriptionString2)"
                }else if let descriptionString3 = weatherDictionary[1]["currentPhaseRemainingTime"]! as? String {
                    println("\nDescription of the weather is: \(descriptionString3)")
                    var judul4 = "\(descriptionString3)"
                }else if let descriptionString4 = weatherDictionary[0]["challengeType"]! as? String {
                    println("\nDescription of the weather is: \(descriptionString4)")
                    var judul5 = "\(descriptionString4)"
                }else if let descriptionString5 = weatherDictionary[0]["challengeId"]! as? String {
                    println("\nDescription of the weather is: \(descriptionString5)")
                    var judul6 = "\(descriptionString5)"
                }else if let descriptionString6 = weatherDictionary[1]["currentStatus"]! as? String {
                    println("\nDescription of the weather is: \(descriptionString6)")
                    var judul7 = "\(descriptionString6)"
                }
            }
        }
    }
    var names: [String] = ["Lorem ipsum dolor sit er elit lamet, Lorem ipsum dolor", "Lorem ipsum dolor sit er elit lamet, Lorem ipsum dolor", "Lorem ipsum dolor sit er elit lamet, Lorem ipsum dolor", "Lorem ipsum dolor sit er elit lamet, Lorem ipsum dolor", "Lorem ipsum dolor sit er elit lamet, Lorem ipsum dolor", "Lorem ipsum dolor sit er elit lamet, Lorem ipsum dolor", "Lorem ipsum dolor sit er elit lamet, Lorem ipsum dolor", "Lorem ipsum dolor sit er elit lamet, Lorem ipsum dolor", "Lorem ipsum dolor sit er elit lamet, Lorem ipsum dolor", "Lorem ipsum dolor sit er elit lamet, Lorem ipsum dolor", "Lorem ipsum dolor sit er elit lamet, Lorem ipsum dolor", "Lorem ipsum dolor sit er elit lamet, Lorem ipsum dolor", "Lorem ipsum dolor sit er elit lamet, Lorem ipsum dolor", "Lorem ipsum dolor sit er elit lamet, Lorem ipsum dolor"]
    // Create the cell and return the cell
    var cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath) as! ImageUICollectionViewCell

    // Add image to cell
    cell.image.image = model.images[indexPath.row]
    cell.labelku.text = names[indexPath.row]
    cell.labelku.backgroundColor = UIColor(white: 0.5, alpha: 0.5)
    return cell
}

我想做的是让变量名变成：

var names: [String] = ["\(judul1)", "\(judul2)", "\(judul3)", "\(judul4)", "\(judul5)", "\(judul6)", "\(judul7)"]

如果judul1到judul7没有创建成为全局变量，它将产生错误“使用未解析标识符”，因此我需要使judul1到judul7成为全局变量

如何创建judul1到judul7成为全局变量

注意。

您不能将函数变量用作全局变量，因为它们仅限于该函数，但您可以通过在类声明上方声明来全局创建变量，如下所示：

import UIKit

var judul1 = ""
var judul7 = ""

class ViewController: UIViewController {
    //Your code
}

现在这将使

judul1

和

judul7

全局化，现在您可以在

cellForItemAtIndexPath

方法中为in赋值，如下所示：

judul1 = "\(descriptionString)"
judul7 = "\(descriptionString6)"

您可以在项目中的任何位置访问它

另一种方法是，您可以使用

NSUserDefaults

将这两个变量存储到磁盘中，如

cellForItemAtIndexPath

方法中所示：

对于

judul1

：

if let descriptionString = weatherDictionary[0]["challengeName"]! as? String {
    println("\nDescription of the weather is: \(descriptionString)")
    var judul1 = "\(descriptionString)"
    NSUserDefaults.standardUserDefaults().setObject(judul1, forKey: "judul1")
}

对于

judul7

：

else if let descriptionString6 = weatherDictionary[1]["currentStatus"]! as? String {
    println("\nDescription of the weather is: \(descriptionString6)")
    var judul7 = "\(descriptionString6)"
    NSUserDefaults.standardUserDefaults().setObject(judul7, forKey: "judul7")
}

之后，您可以在任何地方访问它，如：

let judul1: AnyObject? = NSUserDefaults.standardUserDefaults().objectForKey("judul1")
let judul7: AnyObject? = NSUserDefaults.standardUserDefaults().objectForKey("judul7")

希望它能对您有所帮助。

您不能将函数变量用作全局变量，因为它们仅限于该函数，但您可以通过在类声明上方声明变量来全局创建变量，如下所示：

import UIKit

var judul1 = ""
var judul7 = ""

class ViewController: UIViewController {
    //Your code
}