在UIScrollview中顯示我在哪個圖像swift

說我有4個圖像，我下載我想顛倒我所在的圖像的編號。現在圖像開始於4/4，但我希望它讀取1/4。所以基本上我正試圖扭轉數字。這個功能是查找我所在的圖像號碼。所以它越接近最後的圖像，它就把數字變成1.我想要相反的效果。我希望最後一張圖像的編號變成4.所以，如果我向右滑動數字從4/4到3/4到2/4到1/4。但我想第一個圖像是1而不是4，所以它會從1/4到2/4到3/4到4/4。在UIScrollview中顯示我在哪個圖像swift

這裏是我正在做它：

//MARK: Set up and download Promotions 
var numberPromotions = 0; 
var imageSize = 0; 
private var promos = Array<(picture: String, path: String)>() 

func scrollViewDidEndDecelerating(scrollView: UIScrollView) { 
    print("Scroll finished") 
    print("My promot gus" , self.numberPromotions) 
    print("Scroll number", scrollView.contentOffset.x) 
    print("IMAGE size " , self.imageSize) 

    var myPlace : Double = 0 
    var totalSize : Double = 0 

    let scrollviewOffset = Double(scrollView.contentOffset.x) 
    print("int Scroview " , scrollviewOffset) 



    totalSize = Double(self.imageSize * (numberPromotions - 1)) 
    print("To;tal size" , totalSize) 
    if scrollviewOffset == 0 { 
     myPlace = Double(numberPromotions) 
    }else 
    { 
     myPlace = Double(totalSize/scrollviewOffset) 
     print("Gus Place" , myPlace) 
    } 

    print(myPlace % 1 == 0.5) 
    if myPlace % 1 == 0.5 
    { 
     print("Not a whole number Adding 0.5") 
     myPlace = myPlace + 0.5 
    } 
    print("My place", myPlace) 

    var myString : String 
    let myPlaceString = String(Int(myPlace)) 

    myString = myPlaceString + "/" + String(numberPromotions) 
    numOfPromoLabel.text = myString 

}

來源

2016-10-19 MNM

試試這個：

myString = (String(numberPromotions)-myPlaceString + 1) + "/" + String(numberPromotions)

來源

2016-10-19 07:26:37 benhofmann

工作就像一個魅力，我不得不打破它改變它一點點。這太複雜了，無法及時解決。但這個想法很有效。非常感謝你！ – MNM

在UIScrollview中顯示我在哪個圖像swift

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