使用NSPredicate过滤NSArray

Question

I have an NSArray that I would like to filter with a predicate. Here is what I have.

NSLog(@"text is %@",txtSearch.text);
NSPredicate *bPredicate =
[NSPredicate predicateWithFormat:@"SELF beginswith[c] '%@'",txtSearch.text];
arrSearchedPlayers =
[arrPlayers filteredArrayUsingPredicate:bPredicate];
NSLog(@"array after searched is %@",arrSearchedPlayers);

When I enter a text my array keeps empty. But when I try this predicate,

 NSPredicate *bPredicate =
    [NSPredicate predicateWithFormat:@"SELF beginswith[c] 's'"];

I got the right results.Anybody has an idea what the problem is?

Kind regards

Answer 1

删除谓词中多余的引号

[NSPredicate predicateWithFormat:@"SELF beginswith[c] %@",txtSearch.text];