ios - 使用键值过滤NSarray

Question

我有以下共振阵列。请帮助我过滤“ private ”类型的数组

leagues =     (
                {
            id = 23;
            member = 1;
            name = DelphiFC;
            password = "<null>";
            type = Public;
            username = cyriljose;
        },
                {
            id = 24;
            member = 1;
            name = FascoBreFC;
            password = "<null>";
            type = Public;
            username = cyriljose;
        },
                {
            id = 25;
            member = 1;
            name = HingeSpotFC;
            password = "<null>";
            type = Public;
            username = cyriljose;
        },
                {
            id = 22;
            member = 1;
            name = popilatorFC;
            password = 25369852;
            type = Private;
            username = cyriljose;
        },
                {
            id = 21;
            member = 1;
            name = trojanFC;
            password = 12354687;
            type = Private;
            username = cyriljose;
        }
    );

我的意思是我应该得到一个包含“ private ”类型联赛名称的数组。我是否应该使用NSPredicate？请帮忙

Answer 1

以下是显示type是Private的那些数据的整个示例。

   NSArray *arLeagues = @[@{
                               @"id":@23,
                               @"member":@1,
                               @"name":@"DelphiFC",
                               @"password":@"<null>",
                               @"type":@"Public",
                               @"username":@"cyriljose",
                               },
                           @{
                               @"id":@24,
                               @"member":@1,
                               @"name":@"FascoBreFC",
                               @"password":@"<null>",
                               @"type":@"Public",
                               @"username":@"cyriljose",
                               },
                           @{
                               @"id":@25,
                               @"member":@1,
                               @"name":@"<null>",
                               @"password":@"12354687",
                               @"type":@"Public",
                               @"username":@"cyriljose",
                               },
                           @{
                               @"id":@22,
                               @"member":@1,
                               @"name":@"popilatorFC",
                               @"password":@"25369852",
                               @"type":@"Private",
                               @"username":@"cyriljose",
                               },
                           @{
                               @"id":@21,
                               @"member":@1,
                               @"name":@"trojanFC",
                               @"password":@"12354687",
                               @"type":@"Private",
                               @"username":@"cyriljose",
                               }
                           ];



    NSPredicate *predicate = [NSPredicate predicateWithFormat:
                              @"type  contains[cd] %@", @"Private"];
    NSArray *matchingDicts = [arLeagues filteredArrayUsingPredicate:predicate];
    NSLog(@"%@",matchingDicts);

，输出为

(
        {
        id = 22;
        member = 1;
        name = popilatorFC;
        password = 25369852;
        type = Private;
        username = cyriljose;
    },
        {
        id = 21;
        member = 1;
        name = trojanFC;
        password = 12354687;
        type = Private;
        username = cyriljose;
    }
)