問題：
I have an array of dictionaries. 我有一系列字典。
I want to filter the array based on a key. 我想基於密鑰過濾數組。
I tried this: 我試過這個：
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"(SPORT == %@)", @"Football"];
NSArray *filteredArray = [data filteredArrayUsingPredicate:predicate];
This doesn't work, I get no results. 這不起作用，我沒有結果。 I think I'm doing something wrong. 我想我做錯了什麼。 I know this is the method if "SPORT" was an ivar. 我知道如果“SPORT”是一個ivar，這就是方法。 I think it is probably different if it is a key. 我認爲如果它是關鍵的話可能會有所不同。
I haven't been able to find an example however. 然而，我無法找到一個例子。
Thanks 謝謝
Update 更新
I added quotes around the string I am searching for. 我在我正在搜索的字符串周圍添加了引號。
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"(SPORT == '%@')", @"Football"];
It still does not work. 它仍然無法正常工作。
Update 2 更新2
Solved it. 解決了它。 I actually had to remove the single quotes, which seems to go against what the guide says. 我實際上不得不刪除單引號，這似乎與指南所說的相反。
My real problem is I had a nested array and I wasn't actually evaluating the dictionaries. 我真正的問題是我有一個嵌套數組，我實際上並沒有評估字典。 Bone head move. 骨頭移動。