CODEWITHSUNDEEP
iosobjective-ccore-dataios7nspredicate
PSP
PSP

Reputation: 196

issue in NSPredicate for NSString

In my application I am using CoreData.Amount values are stored in coreData as NSString. In my Interface Builder i have two textfields.When i enter any amount on my textfields This amounts will accept as Minimum Value and maximum Value.I want to get all amounts between minimum and maximum amounts i have entered.

What will be the solution.I just goes through this way Example It Not be worked on my project because i want to convert string to integer on my NSPredicate method.

My code is

 NSPredicate *p1= [NSPredicate predicateWithFormat:@"(amount.intValue => %@) && (amount.intValue <=%@)", text1.intValue,text2.intValue]];

Note that amount is stored as NSString in coredata

Upvotes: 1

Views: 422

Answers (3)

PSP
PSP

Reputation: 196

Currect Answer is

NSPredicate *p1= [NSPredicate predicateWithFormat:@"(amount >= %d) && (amount <= %d)", text1.intValue, text2.intValue]];

Upvotes: 1

Daniel Le
Daniel Le

Reputation: 76

As you store amount as NSString, you need to pass it as NSNumber when doing the evaluation.

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF.intValue <= $max.intValue AND SELF.intValue >= $min.intValue"];

Now you can evaluate the amount to see if it is in range

if ([predicate evaluateWithObject:[NSNumber numberWithInt:amount.intValue] substitutionVariables:@{@"max":[NSNumber numberWithInt:text1.intValue], @"min":[NSNumber numberWithInt:text2.intValue]}])
{
    //Got the correct amount
}

Upvotes: 1

Wain
Wain

Reputation: 119041

NSPredicate *p1= [NSPredicate predicateWithFormat:@"(amount.intValue => %@) && (amount.intValue <=%@)", text1.intValue,text2.intValue]];

You shouldn't be comparing numbers and strings. Compare one or the other. In this case, you want to compare numbers. You should change your source data stored in the model to be a number.

=> should be >=

%d is an integer parameter format, and text1.intValue returns an integer. Using %@ expects an on jest and won't do what you want.

Log the contents of the predicate so you can see what it contains. But mainly, change the type of the data in the model.

Upvotes: 1

Related Questions