Objective-C class to loop through startup items with Automatic Reference Counting (ARC) enabled

PreferencesManager.m

// Based on http://www.bdunagan.com/2010/09/25/cocoa-tip-enabling-launch-on-startup/
// Almost automatic convert to ARC, might need tweaking.
 
#import "PreferencesManager.h"

@implementation PreferencesManager

// MIT license
- (BOOL)isLaunchAtStartup {
    // See if the app is currently in LoginItems.
    LSSharedFileListItemRef itemRef = [self itemRefInLoginItems];
    // Store away that boolean.
    BOOL isInList = itemRef != nil;
    // Release the reference if it exists.
    if (itemRef != nil) CFRelease(itemRef);
    
    return isInList;
}

- (BOOL)toggleLaunchAtStartup {
    // Toggle the state.
    BOOL shouldBeToggled = ![self isLaunchAtStartup];
    
    // Get the LoginItems list.
    LSSharedFileListRef loginItemsRef = LSSharedFileListCreate(NULL, kLSSharedFileListSessionLoginItems, NULL);
    if (loginItemsRef == nil) return shouldBeToggled;
    if (shouldBeToggled) {
        // Add the app to the LoginItems list.
        CFURLRef appUrl = (__bridge CFURLRef)[[NSBundle mainBundle] bundleURL];
        LSSharedFileListItemRef itemRef = LSSharedFileListInsertItemURL(loginItemsRef, kLSSharedFileListItemLast, NULL, NULL, appUrl, NULL, NULL);
        if (itemRef) CFRelease(itemRef);
    }
    else {
        // Remove the app from the LoginItems list.
        LSSharedFileListItemRef itemRef = [self itemRefInLoginItems];
        LSSharedFileListItemRemove(loginItemsRef,itemRef);
        if (itemRef != nil) CFRelease(itemRef);
    }
    return shouldBeToggled;
}

- (LSSharedFileListItemRef)itemRefInLoginItems {
    LSSharedFileListItemRef itemRef = nil;
    
	NSString * appPath = [[NSBundle mainBundle] bundlePath];
    
	// This will retrieve the path for the application
	// For example, /Applications/test.app
	CFURLRef url = (__bridge CFURLRef)[NSURL fileURLWithPath:appPath]; 
    
	// Create a reference to the shared file list.
	LSSharedFileListRef loginItems = LSSharedFileListCreate(NULL, kLSSharedFileListSessionLoginItems, NULL);
    
	if (loginItems) {
		UInt32 seedValue;
		//Retrieve the list of Login Items and cast them to
		// a NSArray so that it will be easier to iterate.
		NSArray  *loginItemsArray = CFBridgingRelease(LSSharedFileListCopySnapshot(loginItems, &seedValue));
		for(int i = 0; i< [loginItemsArray count]; i++){
			LSSharedFileListItemRef currentItemRef = (__bridge LSSharedFileListItemRef)[loginItemsArray
                                                                        objectAtIndex:i];
			//Resolve the item with URL
			if (LSSharedFileListItemResolve(currentItemRef, 0, (CFURLRef*) &url, NULL) == noErr) {
				NSString * urlPath = [(__bridge NSURL*)url path];
				if ([urlPath compare:appPath] == NSOrderedSame){
                    itemRef = currentItemRef;
				}
			}
		}
	}    
    CFRelease(loginItems);
    return itemRef;
}

@end