Why my if condition goes the wrong way

Question

Possible Duplicate:
Checking for equality in Objective-C

I have following codes:

    NSLog(@"Before, let's see what is in itemTitleField: %@", self.itemTitleField.text);
    NSLog(@"And the item title was: %@",self.item.title);
    if (self.itemTitleField.text == @"test") {
        NSLog(@"Look, I've got the new title: %@",self.itemTitleField.text);
    } else {
        NSLog(@"No the item title was different: %@", self.itemTitleField.text);
    }

And when I check the log it was displayed as following:

2013-02-04 09:59:03.308 Test[1275:11303] Before, let's see what is in itemTitleField: test
2013-02-04 09:59:03.309 Test[1275:11303] And the item title was: test
2013-02-04 09:59:03.309 Test[1275:11303] No the item title was different: test

I was expecting:

Look, I've got the new title: test

You cannot use the `==` operator to compare objective-c objects unless you know exactly what you are doing. — Richard J. Ross III, Feb 04 '13 at 02:09

score 2 · Accepted Answer · answered Feb 04 '13 at 02:09

2

inside the if statement, you need to use isEqualToString function:

if([self.itemTitleField.text isEqualToString:@"test"])

answered Feb 04 '13 at 02:09

Dhruv Goel

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Dhruv Goel is right. self.itemTitleField.text == @"test" compares the actual objects and so the newly created string @"test" is not the same object self.itemTitleField.text (you can print their memory location and you'll find that they are different). However, isEqualToString:@"test" compares the content of the string. – hishamaus Feb 04 '13 at 02:12

score 0 · Answer 2 · answered Feb 04 '13 at 02:10

0

You shoud use isEqualToString instead of "==": if ([self.itemTitleField.text isEqualToString:@"test")) {

answered Feb 04 '13 at 02:10

yebw

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Why my if condition goes the wrong way

2 Answers2