我有一个包含许多值的 tableView.
I have a tableView with many values.
我想获取当前正在显示的表格的第一个indexPath.row
值.
I want to get the first indexPath.row
value of the table which is being displayed currently.
我该怎么做?
在实施 krishnabhadra 的回答时出现以下错误:
I get Following Error while implementing krishnabhadra's answer:
错误所在的行是:
[self.table scrollToRowAtIndexPath:indexVis atScrollPosition:UITableViewScrollPositionTop animated:YES];
错误:
Assertion failure in -[NSIndexPath row], /SourceCache/UIKit_Sim/UIKit-1447.6.4/UITableViewSupport.m:2018
2011-04-01 11:57:25.458 GlossaryPro[1525:207] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid index path for use with UITableView. Index paths passed to table view must contain exactly two indices specifying the section and row. Please use the category on NSIndexPath in UITableView.h if possible.'
可能出了什么问题?
可以使用tableView indexPathsForVisibleRows
函数,它返回一个 NSArray
的 NSIndexPath
用于所有可见的 UITableViewCell
.从 indexPath.row
你可以找到你的数组索引.
You can use tableView indexPathsForVisibleRows
function, which returns an NSArray
of NSIndexPath
for all visible UITableViewCell
. From indexPath.row
you can find your array index.
NSArray *visible = [tableView indexPathsForVisibleRows];
NSIndexPath *indexpath = (NSIndexPath*)[visible objectAtIndex:0];
indexPath.row
将为您提供显示的第一个对象的索引.
indexPath.row
will give you index of first object displayed.
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