CODEWITHSUNDEEP
iosnspredicatenscompoundpredicate
Test
Test

Reputation: 177

Multiple NSPredicates to single Array values in ios

In my projects i'm working in NSPredicate i already worked for a single NSPredicate but now i need to Use multiple NSPredicate.Here i'm having one array, from this array i want to filter by the multiple cases,

I'm having three check box like that, initially all are checked when I deselect the green button means it shows only the red & yellow values then I deselect the yellow means it show only the red value again I select the green means it shows the green & red values

i.e 

1.Color is equal or not equal to Green.
2.Color is equal or not equal to Yellow.
3.Color is equal or not equal to Red.

My array having a combination of these three colors Here i tried,

NSPredicate *filterRun,*filterNotProd,*filterStop,*filterR;

    if(isRun){
        filterRun = [NSPredicate predicateWithFormat:@"Color != [c] %@",GREEN_COLOR];
    }
    else{
        filterRun = [NSPredicate predicateWithFormat:@"Color == [c] %@",GREEN_COLOR];
    }

    if(isNotProd){
        filterNotProd = [NSPredicate predicateWithFormat:@"Color != [c] %@",YELLOW_COLOR];
    }
    else{
        filterNotProd = [NSPredicate predicateWithFormat:@"Color == [c] %@",YELLOW_COLOR];
    }


    if(isStop){
        filterStop = [NSPredicate predicateWithFormat:@"Color != [c] %@",RED_COLOR];
    }
    else{
        filterStop = [NSPredicate predicateWithFormat:@"Color == [c] %@",RED_COLOR];
    }
//        filterR = [NSPredicate predicateWithFormat:@"Color LIKE[c] %@",RED_COLOR];       

        NSLog(@"prediStr Runn %@ nnn %@ sss %@",filterRun,filterNotProd,filterStop);
        NSPredicate *compFilter=[NSCompoundPredicate andPredicateWithSubpredicates:@[filterRun,filterNotProd,filterStop]];
//        NSPredicate *compFilter=[NSCompoundPredicate orPredicateWithSubpredicates:@[filterRun,filterNotProd,filterStop]];

        NSMutableArray *filteredArr = [NSMutableArray arrayWithArray:[parkDetailsArr filteredArrayUsingPredicate:compFilter]];
        parkDetailsArr=[NSMutableArray arrayWithArray:filteredArr];

but it showing empty value only..help me..

Upvotes: 1

Views: 143

Answers (1)

Alfredo Luco G
Alfredo Luco G

Reputation: 974

In swift you can set AND / OR NSPredicates for filtering array so, you can only instantiate NSCompoundPredicate class. For example you can combine and / or predicates like this:

let orPredicate:NSCompoundPredicate = NSCompoundPredicate(orPredicateWithSubpredicates: [NSPredicate(format: "petty_cash_description CONTAINS[cd] %@",str!),NSPredicate(format: "project.name CONTAINS[cd] %@",str!),NSPredicate(format: "payment_date CONTAINS %@",str!),NSPredicate(format: "amount == %f",number)])
let andPredicate = NSCompoundPredicate(andPredicateWithSubpredicates: [orPredicate,NSPredicate(format: "id != 0")])

Now you have a custom predicate that combines predicates with AND / OR. In your case, set the empty NSMutableArray (NSMutableArray *array = [NSMutableArray array];) at the top of your function and then instantiate the predicates to empty append when you are combining NSPredicates.

Upvotes: 0

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