Can't seem to read UITextField value correctly

I am 开发者_如何转开发trying to verify that my uitextfield, which only allows numbers isn't 0 (zero). This check fails every time? When debugging resultingString = '0'( I type in zero ) as I am trying to make it fail, but it doesn't fail.

NSString *resultingString = budgetField.text;

if(resultingString == @"0" || [resultingString length] == 0){
    [AppHelpers showAlert:@"Dude!" withMessage:@"Don't be cheap I know you have more than a $1"]; //never gets in here.
    return;
}

To compare two strings you would do this:

[string1 isEqualToString:string2]

Edit: This would compare the actual strings and not the pointers to the strings.

Use "==" for values, not strings:

 ([resultingString intValue] == 0 || [resultingString length] == 0)

The == operator compares pointers. You want to compare the values of the strings instead, so use a method like isEqualToString:.