致命錯誤：索引超出範圍：Swift

Question

我有JSON圖像。

let imagestring : String? = (myData as AnyObject).value(forKey: "Post_mid_image") as? String 

if imagestring != nil{ 
    let imageTrueString = "https://www.zdoof.com/" + imagestring! 
    self.imageStringArray.append(imageTrueString) 
    print(self.imageStringArray) 
} 

當我試圖把它放在表視圖：

let myImage = cell.viewWithTag(30) as! UIImageView 
let myImageString : String? = imageStringArray[indexPath.row] 

if myImageString != nil{ 
    let ImageUrl = URL.init(string: myImageString!) 

    myImage.kf.setImage(with: ImageUrl) 
} 

它顯示如下錯誤：

致命錯誤：索引超出範圍

我的代碼有什麼問題？

Answer 1

你的行數的方法像這樣

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 
     return imageStringArray.count 
    } 

而且使用如果讓避免強行鑄造

if let myImage = cell.viewWithTag(30) as? UIImageView { 
    if let myImageString = imageStringArray[indexPath.row] as? String { 
     let ImageUrl = URL.init(string: myImageString!) 
     myImage.kf.setImage(with: ImageUrl) 

    } 

} 

更新： -

if indexPath.row < imageStringArray.count { 
    if let myImageString = imageStringArray[indexPath.row] as? String { 
     let ImageUrl = URL.init(string: myImageString!) 
     myImage.kf.setImage(with: ImageUrl) 

    } 
}