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我正在開發一個應用程序,其中一個視圖是UICollectionView。我已經使集合視圖完全正常工作。當用戶按下其中一個收集視圖單元格時,會打開一個帶有照片的新視圖。但是,當我嘗試在集合視圖上滾動時,應用程序崩潰。在UICollectionView上滾動時應用程序崩潰
這裏是我的代碼:
cell.imageView?.image = self.cellMapArray[indexPath.row]
我得到的錯誤是
fatal error: Index out of range (lldb)." And the line of code is highlighted with the error "Thread 1: EXC_BAD_INSTRUCTION (code=EXC_l386_INVOP, subcode=0x0)
任何幫助將是:
let cellMapArray = [UIImage(named: "pomona.jpg"), UIImage(named: "Pitzer.jpg"), UIImage(named: "Mudd.jpg"), UIImage(named: "Scripps.jpg"), UIImage(named: "CMC1.jpg")]
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int
{
return self.schoolNames.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell
{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! CollectionViewCell
cell.imageView?.image = self.cellMapArray[indexPath.row]
cell.imageTitle?.text = self.schoolNames[indexPath.row]
return cell
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath)
{
self.performSegue(withIdentifier: "showImage", sender: self)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
{
if segue.identifier == "showImage"
{
let indexPaths = self.collectionView!.indexPathsForSelectedItems!
let indexPath = indexPaths[0] as IndexPath
let vc = segue.destination as! NewViewController
vc.image = self.mapArray[indexPath.row]!
vc.title = self.schoolNames[indexPath.row]
}
}
併線時,應用程序崩潰是高亮不勝感激!
在一個元件中使用多個數組作爲數據源是容易出錯。發生錯誤如果'schoolNames'和'cellMapArray'中的項數不相等。使用自定義類或結構來避免這種錯誤。 – vadian