CODEWITHSUNDEEP
swiftmacosnsxmlparser
Huda
Huda

Reputation: 1

NSXMLParser exc bad access error - swift OS X

I am using NSXMLParser to parse a xml file on my desktop. The NSXMLParser object gives exc bad access error when calling parse method.

This is the code 

        let xmlURl = NSHomeDirectory()+"/Desktop/questions.xml"
        let myUrl = NSURL(fileURLWithPath:xmlURl)
        let  myparser =  NSXMLParser(contentsOfURL: myUrl)
        myparser?.delegate = MyXMLDelegate()
        myparser?.parse() // HERE the EXC bad access code 1

This is the content of the xml file 

<?xml version="1.0" encoding="UTF-8"?>
<addresses owner=”swilson”>
<person>
    <lastName>Doe</lastName>
    <firstName>John</firstName>
    <phone location="mobile">(201) 345-6789</phone>
    <email>[email protected]</email>
    <address>
        <street>100 Main Street</street>
        <city>Somewhere</city>
        <state>New Jersey</state>
        <zip>07670</zip>
    </address>
</person>

What is the problem of the above code?

Thank you in advance.

Upvotes: 0

Views: 85

Answers (1)

Nemo
Nemo

Reputation: 11

This is an annoying, un-obvious bug I ran into. The problem is this line:

myparser?.delegate = MyXMLDelegate()

The delegate property is defined as un-owned. So essentially Swift is releasing your delegate right after this line, resulting in a bad access.

To fix keep a reference to your delegate

let delegate = MyXMLDelegate()
myparser?.delegate = delegate

Upvotes: 1

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