ios 如何为 TableView 创建 NSIndexPath
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How to create NSIndexPath for TableView
提问by Rubber Duck
I need delete row 1 of a table in a function I have defined. In order to use deleteRowAtIndexPathyou must use an IndexPathwith a section and row defined. How can I create an indexpath like this?
我需要在我定义的函数中删除表的第 1 行。为了使用，deleteRowAtIndexPath您必须使用IndexPath定义了节和行的 。如何创建这样的索引路径？
An array with the int {1} as its only member will crash; the NSLog message states that the section needs to be defined as well.
以 int {1} 作为唯一成员的数组会崩溃；NSLog 消息指出该部分也需要定义。
*Edit -> Code relating to cell delete:
*编辑 -> 与单元格删除相关的代码：
NSIndexPath *myIP = [[NSIndexPath alloc] indexPathForRow:0 inSection:0];
NSArray *myArray = [[NSArray alloc] initWithObjects:myIP, nil];
// [self.tableView beginUpdates];
[self.tableView deleteRowsAtIndexPaths:myArray withRowAnimation:UITableViewRowAnimationFade];
// [self.tableView endUpdates];
回答by Ben Gottlieb
Use [NSIndexPath indexPathForRow:inSection:]to quickly create an index path.
使用[NSIndexPath indexPathForRow:inSection:]快速创建一个索引路径。
Edit:In Swift 3:
编辑：在 Swift 3 中：
let indexPath = IndexPath(row: rowIndex, section: sectionIndex)
Swift 5
斯威夫特 5
IndexPath(row: 0, section: 0)
回答by verec
indexPathForRowis a class method!
indexPathForRow是一个类方法！
The code should read:
代码应为：
NSIndexPath *myIP = [NSIndexPath indexPathForRow:0 inSection:0] ;
回答by JohnVanDijk
Obligatory answer in Swift : NSIndexPath(forRow:row, inSection: section)
Swift 中的强制性答案： NSIndexPath(forRow:row, inSection: section)
You will notice that NSIndexPath.indexPathForRow(row, inSection: section)is not available in swift and you must use the first method to construct the indexPath.
您会注意到它NSIndexPath.indexPathForRow(row, inSection: section)在 swift 中不可用，您必须使用第一种方法来构造 indexPath。
回答by comrade
For Swift 3 it's now: IndexPath(row: rowIndex, section: sectionIndex)
对于 Swift 3，现在是： IndexPath(row: rowIndex, section: sectionIndex)
