StackOverflow2013

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POVariable Scope Problem, iPhone
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copied!<p>I need some help here so I will do my best to explain. I have worked on this all day and had no success (just learning!)</p> <p>I have:</p> <pre><code>NSArray *getValue(NSString *iosearch) { mach_port_t masterPort; CFTypeID propID = (CFTypeID) NULL; unsigned int bufSize; kern_return_t kr = IOMasterPort(MACH_PORT_NULL, &masterPort); if (kr != noErr) return nil; io_registry_entry_t entry = IORegistryGetRootEntry(masterPort); if (entry == MACH_PORT_NULL) return nil; CFTypeRef prop = IORegistryEntrySearchCFProperty(entry, kIODeviceTreePlane, (CFStringRef) iosearch, nil, kIORegistryIterateRecursively); if (!prop) return nil; propID = CFGetTypeID(prop); if (!(propID == CFDataGetTypeID())) { mach_port_deallocate(mach_task_self(), masterPort); return nil; } CFDataRef propData = (CFDataRef) prop; if (!propData) return nil; bufSize = CFDataGetLength(propData); if (!bufSize) return nil; NSString *p1 = [[[NSString alloc] initWithBytes:CFDataGetBytePtr(propData) length:bufSize encoding:1] autorelease]; mach_port_deallocate(mach_task_self(), masterPort); return [p1 componentsSeparatedByString:@"\0"]; } - (NSString *) serialnumber { NSArray *results = getValue(@"serial-number"); if (results) return [results objectAtIndex:0]; return nil; } - (NSString *) backlightlevel { NSArray *results = getValue(@"backlight-level"); if (results) return [results objectAtIndex:0]; return nil; } </code></pre> <p>I have a tableView set up and want to display my array in it so I then have:</p> <pre><code>- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {............. ......................................................... cell.text = [results objectAtIndex:indexPath.row]; // error results undeclared here return cell; } </code></pre> <p>In my .h file I have:</p> <pre><code>@interface UIDevice_IOKitExtensionsViewController : UIViewController { IBOutlet UITableView *tblSimpleTable; NSArray *results; } @property (nonatomic, retain) NSArray *results; - (NSString *) serialnumber; - (NSString *) backlightlevel; </code></pre> <p>The problem is I get results undeclared as indicated above. I also can't figure how I could get serialnumber and backlightlevel to display on the click of a button or even at load. My attempts have thrown back errors like error: 'serialnumber' undeclared (first use in this function) and warnings like warning: 'return' with a value, in function returning void. Sorry for the long question!</p> <p>Many thanks, Stuart</p>

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