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POSegmentedControl to change TableView data
 

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    <p>I have a tableview with a segmentedControl in the header, i want the segment control to change the data depending on which segment is clicked, in this case Upcoming/Weekly.</p> <p>Both data sources come from an XML file on my server, which is the part im having trouble with, as im still new to using NSXMLParser</p> <p>ive messed around with some code, but to no avail. I know that my segmentAction is being picked up because ive used logs to do so. attached is code and an image of my table, cheers</p> <p><strong><em>When i click a segmented control, the tableview doesnt update with the new XML source</em></strong> </p> <p>:)</p> <p><img src="https://i.stack.imgur.com/1m2jv.png" alt="enter image description here"></p> <p><strong>RootViewController.h</strong></p> <pre><code>#import &lt;UIKit/UIKit.h&gt; @class XMLAppDelegate, BookDetailViewController; @interface RootViewController : UITableViewController &lt;UITableViewDelegate&gt; { XMLAppDelegate *appDelegate; BookDetailViewController *bdvController; UITableViewCell *eventUpCVCell; UILabel *month; UILabel *title; UILabel *date; UISegmentedControl *segmentedControl; } @property (nonatomic, retain) IBOutlet UITableViewCell *eventUpCVCell; @property (nonatomic, retain) IBOutlet UISegmentedControl *segmentedControl; @property (nonatomic, retain) IBOutlet UILabel *month; @property (nonatomic, retain) IBOutlet UILabel *title; @property (nonatomic, retain) IBOutlet UILabel *date; @end </code></pre> <p><strong>RootViewController.m</strong></p> <pre><code>#import "RootViewController.h" #import "XMLAppDelegate.h" #import "Book.h" #import "BookDetailViewController.h" #define kLabel1Tag 1 #define kLabel2Tag 2 #define kLabel3Tag 3 @implementation RootViewController @synthesize eventUpCVCell, segmentedControl; @synthesize month, title, date; -(void)viewDidLoad { appDelegate = (XMLAppDelegate *)[[UIApplication sharedApplication] delegate]; self.title = @"Upcoming Events"; [super viewDidLoad]; NSURL *urlUpcoming = [[NSURL alloc] initWithString:@"http://www.randomosity.com.au/EventsUpcoming.xml"]; NSURL *urlWeekly = [[NSURL alloc] initWithString:@"http://www.randomosity.com.au/EventsWeekly.xml"]; } -(IBAction)segmentedAction:(id)sender { XMLAppDelegate *mainDelegate = (XMLAppDelegate *)[[UIApplication sharedApplication] delegate]; segmentedControl = (UISegmentedControl *)sender; if (segmentedControl.selectedSegmentIndex == 0) { mainDelegate.url = [[NSURL alloc] initWithString:@"http://www.randomosity.com.au/EventsUpcoming.xml"]; [self.tableView reloadData]; } else if (segmentedControl.selectedSegmentIndex == 1) { NSLog(@"Hello 2"); mainDelegate.url = [[NSURL alloc] initWithString:@"http://www.randomosity.com.au/EventsWeekly.xml"]; [self.tableView reloadData]; } } - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { return 66; } - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return 1; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return [appDelegate.eventDataUp count]; } etc etc... </code></pre> <p><strong>XMLAppDelegate.h</strong></p> <pre><code>#import &lt;UIKit/UIKit.h&gt; @interface XMLAppDelegate : NSObject &lt;UIApplicationDelegate&gt; { UIWindow *window; UINavigationController *navigationController; NSString *url; NSMutableArray *eventDataUp; } @property (nonatomic, retain) IBOutlet UIWindow *window; @property (nonatomic, retain) IBOutlet UINavigationController *navigationController; @property (nonatomic, retain) NSString *url; @property (nonatomic, retain) NSMutableArray *eventDataUp; @end </code></pre> <p><strong>XMLAppDelegate.m</strong></p> <pre><code>#import "XMLAppDelegate.h" #import "RootViewController.h" #import "XMLParser.h" @implementation XMLAppDelegate @synthesize window; @synthesize navigationController, eventDataUp; @synthesize url; - (void)applicationDidFinishLaunching:(UIApplication *)application { //RootViewController *rvController = [[RootViewController alloc] init]; NSURL *urlUpcoming = [[NSURL alloc] initWithString:@"http://www.randomosity.com.au/EventsUpcoming.xml"]; // NSURL *urlWeekly = [[NSURL alloc] initWithString:@"http://www.randomosity.com.au/EventsWeekly.xml"]; NSURL *url = urlUpcoming; NSXMLParser *xmlParser = [[NSXMLParser alloc] initWithContentsOfURL:url]; //Initialize the delegate. XMLParser *parser = [[XMLParser alloc] initXMLParser]; //Set delegate [xmlParser setDelegate:parser]; //Start parsing the XML file. BOOL success = [xmlParser parse]; if(success) NSLog(@"No Errors"); else NSLog(@"Error Error Error!!!"); // Configure and show the window [window addSubview:[navigationController view]]; [window makeKeyAndVisible]; } - (void)applicationWillTerminate:(UIApplication *)application { // Save data if appropriate } - (void)dealloc { [eventDataUp release]; [navigationController release]; [window release]; [super dealloc]; } @end </code></pre> <p><strong>XMLParser</strong></p> <pre><code>#import &lt;UIKit/UIKit.h&gt; @class XMLAppDelegate, Book; @interface XMLParser : NSObject { NSMutableString *currentElementValue; XMLAppDelegate *appDelegate; Book *eventUp; } - (XMLParser *) initXMLParser; @end // // XMLParser.m // XML // // Created by iPhone SDK Articles on 11/23/08. // Copyright 2008 www.iPhoneSDKArticles.com. // #import "XMLParser.h" #import "XMLAppDelegate.h" #import "Book.h" @implementation XMLParser - (XMLParser *) initXMLParser { [super init]; appDelegate = (XMLAppDelegate *)[[UIApplication sharedApplication] delegate]; return self; } - (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict { if([elementName isEqualToString:@"EventsUpcoming"]) { //Initialize the array. appDelegate.eventDataUp = [[NSMutableArray alloc] init]; } else if([elementName isEqualToString:@"Event"]) { //Initialize the book. eventUp = [[Book alloc] init]; //Extract the attribute here. eventUp.eventUpID = [[attributeDict objectForKey:@"id"] integerValue]; NSLog(@"Reading id value :%i", eventUp.eventUpID); } NSLog(@"Processing Element: %@", elementName); } - (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { if(!currentElementValue) currentElementValue = [[NSMutableString alloc] initWithString:string]; else [currentElementValue appendString:string]; NSLog(@"Processing Value: %@", currentElementValue); } - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName { if([elementName isEqualToString:@"EventsUpcoming"]) return; //There is nothing to do if we encounter the Books element here. //If we encounter the Book element howevere, we want to add the book object to the array // and release the object. if([elementName isEqualToString:@"Event"]) { [appDelegate.eventDataUp addObject:eventUp]; [eventUp release]; eventUp = nil; } else [eventUp setValue:currentElementValue forKey:elementName]; [currentElementValue release]; currentElementValue = nil; } - (void) dealloc { [eventUp release]; [currentElementValue release]; [super dealloc]; } @end </code></pre>
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