CODEWITHSUNDEEP
iosobjective-ciphone
Akii_Dev
Akii_Dev

Reputation: 53

how to work with NSPredicate

I am try to search word which contain "EVBAR02". Can any body help me in this case. Here is Array Directory.

Here is code.

`NSMutableArray *filteredListContent = [NSMutableArray     arrayWithArray:arrayGallery];
NSPredicate *predicate = [NSPredicate predicateWithFormat:[NSString     stringWithFormat:@"imageUrl CONTAINS[cd] EVBAR02"];
[filteredListContent filterUsingPredicate:predicate];`


arrayGallery = (
    {
        imageId = "04";
        imageUrl = "/article/THEV-EVBAR04.jpg";
    },
    {
        imageId = "02";
        imageUrl = "/article/THEV-EVBAR02.jpg";
    },
    {
        imageId = "06";
        imageUrl = "/article/THEV-EVBAR06.jpg";
    }
)

But Its not working. What to do?

Upvotes: 1

Views: 151

Answers (5)

vadian
vadian

Reputation: 285079

The ...WithFormat part of predicateWithFormat: works the same way like stringWithFormat:

NSString *searchString = @"EVBAR02";
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"imageUrl CONTAINS[cd] %@", searchString];

Or literally in single quotes:

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"imageUrl CONTAINS[cd] 'EVBAR02'"];

The quotation is required as described in the documentation:

String constants must be quoted within the expression—single and double quotes are both acceptable, but must be paired appropriately (that is, a double quote (") does not match a single quote ('))

Upvotes: 1

Ronak Chaniyara
Ronak Chaniyara

Reputation: 5435

There is no need of NSString stringWithFormat, directly use NSPredicate predicateWithFormat as below:

NSMutableArray *filteredListContent = [NSMutableArray arrayWithArray:arrayGallery];

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"imageUrl CONTAINS[cd] 'EVBAR02'"];

[filteredListContent filterUsingPredicate:predicate];

Hope it will help:)

Upvotes: 0

Shreyank
Shreyank

Reputation: 1549

NSString *myString = @"EVBAR02";
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"imageUrl
     contains[cd] %@", myString];
NSMutableArray *arrResult =[filteredListContent filteredArrayUsingPredicate:predicate];

Upvotes: 0

stefos
stefos

Reputation: 1235

You have to set single quotes in your search string :

NSPredicate *predicate = [NSPredicate predicateWithFormat : @"imageUrl CONTAINS[cd] 'EVBAR02' "]

Upvotes: 0

Nicolas Buquet
Nicolas Buquet

Reputation: 3955

Vadian is right.

And if you want to pass the field name as a parameter, use %Kin place of %@:

NSString *searchField = @"imageUrl";
NSString *searchString = @"EVBAR02";

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"%K CONTAINS[cd] %@", searchField, searchString];

Upvotes: 0

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