按照数组中的字符串顺序给另一个数组排序

数组1

NSArray *parAry = @[@{@"name":@"历史",@"value":@"90", @"grade":@"2"},
                   @{@"name":@"化学",@"value":@"92",@"grade":@"2"},
                   @{@"name":@"英语", @"value":@"98",@"grade":@"1"},
                   @{@"name":@"语文", @"value":@"96", @"grade":@"1"},
                   @{@"name":@"物理", @"value":@"91", @"grade":@"2"},
                   @{@"name":@"地理", @"value":@"90", @"grade":@"2"},
                   @{@"name":@"生物", @"value":@"98", @"grade":@"1"},
                   @{@"name":@"数学", @"value":@"96", @"grade":@"1"}];

数组2:

NSArray *keyAry = @[@"语文",@"数学", @"英语",@"物理",@"化学",@"生物",@"地理",@"历史"];

数组1按照数组2的顺序排序

//按KeyAry数组顺序给parAry排序
    NSArray *screenNames = [parAry valueForKeyPath:@"name.lowercaseString"];
    NSDictionary *userDictsByScreenName = [NSDictionary dictionaryWithObjects:parAry forKeys:screenNames];
    NSMutableArray *sortedUserDicts = [NSMutableArray arrayWithCapacity:keyAry.count];
    for (NSString *username in keyAry) {
        NSDictionary *userDict = [userDictsByScreenName objectForKey:username.lowercaseString];
        [sortedUserDicts addObject:userDict];
    }

sortedUserDicts就是排序后的数组