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我想實現皮克和流行預覽的照片庫下面的代碼的圖像:layoutAttributesForItemAtIndexPath不返回的實際位置,並彈出
func previewingContext(previewingContext: UIViewControllerPreviewing, viewControllerForLocation location: CGPoint) -> UIViewController? {
if let indexPath = self.collectionView!.indexPathForItemAtPoint(location), cellAttributes = self.collectionView!.layoutAttributesForItemAtIndexPath(indexPath) {
previewingContext.sourceRect = cellAttributes.frame
}
let selectedPhotoAsset = self.allPhotos[self.selectedPhotoIndexPath![0].item] as! PHAsset
guard let displayImageDetailVC = storyboard?.instantiateViewControllerWithIdentifier("DisplayImageDetailVC") as? DisplayImageViewController else {
print("Error instantiate DisplayImageDetail View Controller")
return nil
}
displayImageDetailVC.selectedPhotoAsset = selectedPhotoAsset
return displayImageDetailVC
}
即使它的工作原理,但問題出現在收集視圖滾動後,預覽區域有時在試圖查看時不在準確的單元格位置。
有沒有什麼辦法可以得到細胞的實際位置?