Reloaddata not call cellForRowatIndexPath - ios

Question

I create a UITableViewController using storyboard, and want to reload the tableview every time it detect a device(for bonjour protocol).
However, the reload data method only calls numberofRows, but not call CellForRowatIndexPath. So I have nothing changed. The mutablearray I checked is always going correctly. NewObjects are added. But the tableview doesn't change with the array. So I am wondering if I set sth wrong here.
From the NSLog I added, I found, I could load the tableview at the beginning with
the initialized array
self.serviceArray = [[NSMutableArray alloc]initWithObjects:#"test", nil];
But in the method
- (void)addService:(NSNetService *)....
Everytime I reload, the new object can be added to the mutableArray, but the tableview doesn't change with the array. (It called the numberOfRows, and I check the array size returned is not 0, but then it doesn't call the cellOfRowAtIndex)
Here is my code
.h file
#import <UIKit/UIKit.h>
#import "Server.h"
#interface BrowserViewController : UITableViewController <ServerDelegate>
{
Server *_server;
NSMutableArray *_serviceArray;
}
#property (retain,nonatomic) NSMutableArray *serviceArray;
#property (nonatomic,retain) Server *server;
- (void)addService:(NSNetService *)service moreComing:(BOOL)more;
#end
.m file
#import "BrowserViewController.h"
#implementation BrowserViewController
#synthesize serviceArray = _serviceArray;
#synthesize server = _server;
- (void) dealloc
{
[self.serviceArray release];
[self.tableView release];
[super dealloc];
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:YES];
self.title = #"Service Browser";
_serviceArray = nil;
self.serviceArray = nil;
[self.tableView setDelegate: self];
[self.tableView setDataSource:self];
//actually I set this in the storyboard already
[self.tableView reloadData];
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
_serviceArray = nil;
NSLog(#"viewwilldisappear");
}
- (NSMutableArray *)serviceArray {
if(nil == _serviceArray) {
self.serviceArray = [[NSMutableArray alloc]initWithObjects:#"test", nil];
}
else
{
NSLog(#"update array");
}
return _serviceArray;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)addService:(NSNetService *)service moreComing:(BOOL)more{
[self.serviceArray addObject:service];
if (!more) {
[self.tableView reloadData];
}
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
return #"Connection Choices";
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [self.serviceArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *Cell = [self.tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (Cell == nil) {
Cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]autorelease];
}
NSString *text = [self.serviceArray objectAtIndex:indexPath.row];
Cell.textLabel.text = text;
return Cell;
}
#end
I checked some solution, it's either delegate setting problem, or the array is null. or cell initialized without space. Is there any way to check what's the delegate of some method ?
I also tried to create a tableview property in the .h file, linked IBOutlet, then synthesize it in the .m. But still doesn't work. Could anyone help me?
Since a lot of tutorials are based on window-based application, could someone maybe provide me some tutorial using storyboard and using reloadData ? I could check if the Outlets are wrong.
Thanks in advance.
UPDATE1
AddService method is called in the appDelegate
appDelegate.h
#import <UIKit/UIKit.h>
#import "Server.h"
#class BrowserViewController;
#interface iphoneNetworkAppDelegate : NSObject <UIApplicationDelegate,UITableViewDataSource, UITableViewDelegate, ServerDelegate>
{
Server *_server;
UIWindow *window;
IBOutlet BrowserViewController *BrowserVC;
}
#property (strong, nonatomic) UIWindow *window;
#end
appDelegate.m
#import "iphoneNetworkAppDelegate.h"
#import "BrowserViewController.h"
#implementation iphoneNetworkAppDelegate
#synthesize window;
- (void)dealloc
{
[window release];
[_server release];
_server = nil;
[BrowserVC release];
BrowserVC = nil;
[super dealloc];
}
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
NSString *type = #"TestingProtocol";
_server = [[Server alloc] initWithProtocol:type];
_server.delegate = self;
NSError *error = nil;
if(![_server start:&error]) {
NSLog(#"error = %#", error);
}
BrowserVC = [BrowserViewController alloc];
if (BrowserVC == nil) {
NSLog(#"need to init");
}
BrowserVC.server = _server;
return YES;
}
#pragma mark Server Delegate Methods
- (void)serverRemoteConnectionComplete:(Server *)server {
NSLog(#"Server Started");
BrowserVC.server = server;
}
- (void)serverStopped:(Server *)server {
NSLog(#"Server stopped");
}
- (void)server:(Server *)server didNotStart:(NSDictionary *)errorDict {
NSLog(#"Server did not start %#", errorDict);
}
- (void)server:(Server *)server didAcceptData:(NSData *)data {
NSLog(#"Server did accept data %#", data);
}
- (void)server:(Server *)server lostConnection:(NSDictionary *)errorDict {
NSLog(#"Server lost connection %#", errorDict);
}
- (void)serviceAdded:(NSNetService *)service moreComing:(BOOL)more {
NSLog(#"service added in delegate");
[BrowserVC addService:service moreComing:more];
}
#pragma mark -
- (void)applicationWillTerminate:(UIApplication *)application {
[_server stop];
[_server stopBrowser];
}
If the appDelegate setting is like this, reloadData cannot be called ?

Answer 1

Please check this terms may help you:
self.tableView is object bind in TableView in XIB.
Included <UITableViewDelegate,UITableViewDataSource> delegates in .h file?
Properly set getter setter your object "self.tableView"
Delegate set?
a)[self.tableView setDelegate: self];
b)[self.tableView setDataSource:self];

Answer 2

i think No need for the following lines in view will appear
_serviceArray = nil;
self.serviceArray = nil;
And also makes sure that the function addService got called: