NSXMLParser init Error message.

Hi:

Im using Xcode 4 to parse an xml string in to a custom object. Ive followed a couple of online examples and can get it to work.

However, when I follow them I get an error with one of the lines of code. If I comment it out it works, but I'm concerned (as I'm new to this) that perhaps it will cause a problem down the line...

My problem is in initXML and the line is [super init];

With this in I get error: Result of delegate init call must be immediately returned or assigned to self.

If I comment it out it works.

Can someone explain, as I can't see a difference between examples online and my code...

.h

Code:

#import <Foundation/Foundation.h>

@class MyRecord;

@interface XMLParser : NSObject
{
    NSMutableString *currentElementValue;
    MyRecord *record;
    NSMutableArray *records;
}

@property (nonatomic, retain) MyRecord *record;
@property (nonatomic, retain) NSMutableArray *records;

- (XMLParser *) initXMLParser;

@end

.m

Code:

#import "XMLParser.h"
#import "MyRecord.h"

@implementation XMLParser

@synthesize record, records;

- (XMLParser *) initXMLParser 
{
//    [super init];
    
    records = [[NSMutableArray alloc] init];
    return self;
}

 

No, as thats not what I'm asking.

I can do what the error says as you suggest but I would like to understand why almost all the examples I have seen look to have the code as I do without an error!

I don't just want to do something without understanding otherwise I will never learn and keep asking such questions...

So, can you be of any help?

----------

Here is one of the examples I looked at: here

Can anyone explain why I get an error as described above even though I have seen variations on this code above all doing the init method the same way?

Is it to do with changes introduced in Xcode 4 and I'm looking at an old way which doesn't work when using ARC or something?

 

I am using:

Code:

XMLParser * parser = [[XMLParser alloc] initXMLParser];

(as per the code example I was following).

[super init] I believe would call the init method of the superclass of the class I am in.

So the intention would be to call any super class initialisation and then to perform my own initialisation such as initialise my array and return it to the caller.

Im struggling to get a handle on this.

Appreciate your help with this as I said I want to understand what is wrong with my code even thought I can make it work, but I'm missing something (thats probably obvious).

 

Ok I think I get that your saying:

My init returns a value which I assign to a var

yet

when I call the superclass init I don't assign it to a var an this is what the compiler is saying when it says:

Result of delegate init call must be immediately returned or assigned to self

If I have understood this then I'm fine with this as I should either

return the result of the super call to assign to a var
or
assign it to self (as per the message)

But if thats the case, I still don't understand why I see many examples using the code this way but not doing what I say above.

Perhaps I think I understand but don't?

 

Thanks, I think I have it now. The compiler just needs me to be specific and hence the need to assign to self or return directly from my super call.

Thanks again.

 

Thats what was confusing me, thanks.