```
[
    {"theKeyOne"  :"One"},
    {"theKeyTwo"  :"Two"},
    {"theKeyThree":"Three"},
],

```

I want use String for predicateWithFormat to NSPredicate

for example

```
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"(%@ == %@)", @"theKeyTwo", @"theKeyTwo"];

```

the code, I think only output `{"theKeyTwo" :"Two"}`

but output allInfo.

the first Index is `{"theKeyOne" :"One"}` !!!

I want to get `Two` for `theKeyTwo`

I just know the

> 
> theKeyTwo
> 
> 
> 

How should I use it for `NSPredicate`?