ios 如何从行索引 Swift 获取索引路径
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How to get indexpath from row index Swift
提问by Saira Nawaz
I am loading an array to UIcollectionview(later will add other data) . I want to select collection view item randomly as:
我正在加载一个数组UIcollectionview（稍后将添加其他数据）。我想随机选择集合视图项目：
var indexpath = Int(arc4random_uniform(UInt32(items.count)-1)
self.collectionview.selectitem(at: **indexpath**, animated:true ,scrollPosition:UICollectionViewScrollPosition)
Here it's giving me error at bold position saying:
在这里，它在粗体位置给了我错误说：
cannot convert value of type Int to expected argument type 'IndexPath?
无法将 Int 类型的值转换为预期的参数类型“IndexPath”？
I can understand this exception as indexpathis different in swift from collection data index(array index). But I am unable to find any method that can convert item index to indexpath or anyother way.
我可以理解此异常与indexpathswift 中的集合数据索引（数组索引）不同。但是我找不到任何可以将项目索引转换为 indexpath 或任何其他方式的方法。
I am newer to iOS so might be not good at searching correct keywords for such issue. It will be a great favour from you all for any other method to this requirement.
我是 iOS 新手，所以可能不擅长为此类问题搜索正确的关键字。对于满足此要求的任何其他方法，这将是你们所有人的一大福音。
回答by KrishnaCA
To create an IndexPathin swift 3 for UICollectionView
创建一个IndexPathin swift 3 forUICollectionView
let indexPath = IndexPath(item: 0, section: 0)
回答by Syed Ali Salman
You can use it
你可以使用它
let indexPath = NSIndexPath(forRow: 0, inSection: 0)
回答by Urvish Modi
Swift 3 Latest
斯威夫特 3 最新
self.table.reloadRows(at: [IndexPath(row: 0, section: 0)], with: .fade)
回答by Gurjinder Singh
Swift 4.1. Here I created function to get NSIndexPath. Just pass your UIView(UIButton,UITextField etc) and UICollectionView object to get NSIndexPath.
斯威夫特 4.1。在这里我创建了函数来获取 NSIndexPath。只需传递您的 UIView(UIButton,UITextField etc) 和 UICollectionView 对象即可获取 NSIndexPath。
func getIndexPathFor(view: UIView, collectionView: UICollectionView) -> NSIndexPath? {
let point = collectionView.convert(view.bounds.origin, from: view)
let indexPath = collectionView.indexPathForItem(at: point)
return indexPath as NSIndexPath?
}
