ios - NSPredicate用于字典数组中的内键

Question

我有以下格式的字典数组

    [
 {
      "student": {
        "id": "1",

        "studentUserDetail": {
          "firstName": "Bonny",
          "lastName": "Roby"  
        }
    }

 },

 {
      "student": {
        "id": "1",

        "studentUserDetail": {
          "firstName": "Bonny",
          "lastName": "Kety"  
        }
    }

 },

 {
      "student": {
        "id": "1",

        "studentUserDetail": {
          "firstName": "Arther",
          "lastName": "Fone"  
        }
    }

 },

]

在上面的数组中，我需要过滤内部键student.StudentUserDetails.firstName中包含serachKey(例如Bonny)的所有元素。我如何使用NSPredicate进行过滤

Answer 1

NSString *name = @"Bonny";
NSPredicate *pred = [NSPredicate predicateWithFormat:
                    @"student.studentUserDetail.firstName == %@", name];     
NSArray *arr = [self.anArray filteredArrayUsingPredicate:pred];

NSLog(@"Bonny found at : %@", arr);

编辑:

如果要基于模式搜索，请使用:

NSPredicate *pred = [NSPredicate predicateWithFormat:
                    @"student.studentUserDetail.firstName beginswith[cd] %@", name];