Cannot reload table view in IOS7 - ios

Question

I am a quite new to IOS development and keep having struggle with it. I would like to display phone list which an user has from my server but tableview does not display items. I have got data from server well and I think settings for UItableView is correct. Here is my code:
STKPhoneHolderViewController.h
#import <UIKit/UIKit.h>
#import "STKSimpleHttpClientDelegate.h"
#interface STKPhoneHolderViewController : UITableViewController <UITableViewDataSource, STKSimpleHttpClientDelegate>
#property (strong, nonatomic) IBOutlet UITableView *phoneTable;
#property (strong, nonatomic) NSMutableArray *phoneArray;
#end
STKPhoneHolderViewController.m
#implementation STKPhoneHolderViewController
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Uncomment the following line to preserve selection between presentations.
// self.clearsSelectionOnViewWillAppear = NO;
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
self.phoneTable.dataSource = self;
self.phoneArray = [[NSMutableArray alloc]init];
[self loadPhoneList];
}
#pragma mark - Table view data source
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return [self.phoneArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"PhoneCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
STKPhoneHolder *phoneHolder = [self.phoneArray objectAtIndex:indexPath.row];
[cell.textLabel setText:phoneHolder.userName];
return cell;
}
#pragma Custom method
- (void) loadPhoneList
{
self.phoneArray = [[NSMutableArray alloc]init];
STKSimpleHttpClient *client = [[STKSimpleHttpClient alloc]init];
client.delegate = self;
NSString *userId = #"your_id_h";
NSString *sUrl = [NSString stringWithFormat:#"%#%#?userid=%#",
MOBILE_API_URL,
PHONEHOLDER_URI,
userId];
[client send:sUrl data:#""];
}
#pragma STKSimpleHttpClientDelegate
-(void) complete:(STKHttpResult*) result
{
if (result.ok != YES){
[STKUtility alert:result.message];
return;
}
self.phoneArray = (NSMutableArray*)result.result;
for (STKPhoneHolder *holder in self.phoneArray) {
NSLog(#"%#", [holder description]);
}
[self.phoneTable reloadData];
NSLog(#" isMainThread(%d)", [NSThread isMainThread] );
}
#end
STKSimpleHttpClient.m
#import "STKSimpleHttpClient.h"
#import "STKSimpleHttpClientDelegate.h"
#implementation STKSimpleHttpClient
NSMutableData *responseData;
STKHttpResult *httpResult;
void (^completeFunction)(STKHttpResult *);
- (void) send:(NSString*)url
data:(NSString*)data
{
httpResult = [[STKHttpResult alloc]init];
dispatch_async(dispatch_get_main_queue(), ^{
if ( data == nil) return;
//Get request object and set properties
NSMutableURLRequest * urlRequest = [NSMutableURLRequest requestWithURL: [NSURL URLWithString: url]];
//set header for JSON request and response
[urlRequest setValue:#"application/json; charset=utf-8" forHTTPHeaderField:#"Content-Type"];
[urlRequest setValue:#"application/json" forHTTPHeaderField:#"Accept"];
//set http method to POST
[urlRequest setHTTPMethod:#"POST"];
//set time out
[urlRequest setTimeoutInterval:20];
NSData *body = [data dataUsingEncoding:NSUTF8StringEncoding];
//set request body
urlRequest.HTTPBody = body;
//connect to server
NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:urlRequest delegate:self];
if (conn==nil){
//Do something
}
});
}
#pragma mark - NSURLConnection Delegate
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
// A response has been received, this is where we initialize the instance var you created
// so that we can append data to it in the didReceiveData method
// Furthermore, this method is called each time there is a redirect so reinitializing it
// also serves to clear it
responseData = [[NSMutableData alloc] init];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
// Append the new data to the instance variable you declared
[responseData appendData:data];
}
- (NSCachedURLResponse *)connection:(NSURLConnection *)connection
willCacheResponse:(NSCachedURLResponse*)cachedResponse {
// Return nil to indicate not necessary to store a cached response for this connection
return nil;
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
// The request is complete and data has been received
// You can parse the stuff in your instance variable noow
NSError *error;
NSDictionary* json = [NSJSONSerialization JSONObjectWithData:responseData options:kNilOptions error:&error];
BOOL ok = [[json objectForKey:#"ok"] boolValue];
NSString *message = [json objectForKey:#"message"];
if (ok == NO) {
[httpResult setError:message];
} else {
[httpResult setSuccess:[json objectForKey:#"result"]];
}
if (self.delegate !=nil) {
[self.delegate complete:httpResult];
}
responseData = nil;
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
// The request has failed for some reason!
// Check the error var
if (self.delegate !=nil) {
[self.delegate complete:[httpResult setError:#"Connection failed."]];
}
}
STKPhoneHolder.m
#import <Foundation/Foundation.h>
#interface STKPhoneHolder : NSObject
#property NSString *deviceId;
#property NSString *userId;
#property NSString *userName;
#property NSString *msn;
- (id) initWithDeviceId:(NSString*)aDeviceId
userId:(NSString*)aUserId
userName:(NSString*)aUserName
msn:(NSString*)aMsn;
#end
Log:
2013-12-17 16:14:23.447 [5323:70b] {
deviceId = 11111;
email = "";
msn = 11111111;
role = "";
userId = aaaaaa;
userName = "Joshua Pak";
}
2013-12-17 16:14:23.448 [5323:70b] {
deviceId = 22222;
email = "";
msn = 2222222;
role = "";
userId = bbbbb;
userName = "Jasdf Pak";
}
2013-12-17 16:14:23.449 Stalker[5323:70b] isMainThread(1)
I can see the log printing phoneArray with two phones in 'complete' method but tableview just display "No record". Tableview does not render again even though I called reloadData method. I made sure that [self.phoneTable reloadData] is called in debugging mode.
What do I have to do more?

Answer 1

Try to call reloadData in main thread
#pragma STKSimpleHttpClientDelegate
-(void) complete:(STKHttpResult*) result
{
if (result.ok != YES){
[STKUtility alert:result.message];
return;
}
self.phoneArray = (NSMutableArray*)result.result;
for (STKPhoneHolder *holder in self.phoneArray) {
NSLog(#"%#", [holder description]);
}
dispatch_async(dispatch_get_main_queue(), ^{
[self.phoneTable reloadData];
}
}
Or you can use performSelectorOnMainThread
[self.phoneTable performSelectorOnMainThread:#selector(reloadData)
withObject:nil
waitUntilDone:NO];
I am guessing STKSimpleHttpClient class is calling complete delegate function on different thread, all user interface interaction suppose to be called from main thread.
Try this code to see which thread you are in from the complete delegate function
NSLog(#" isMainThread(%d)", [NSThread isMainThread] );

Answer 2

check this. does the code load the tableview before you get information from web services. if so then write the statement [tableview Reload]; next to the web services information getting process. This will help

Answer 3

It's not necessary to specify the number of sections, but you might want to do it with this code:
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}

Answer 4

I see you're using a Table View Controller, which already has a tableView reference self.tableView.
Like #rdelmar said, you could use that reference instead of your phoneTable:
[[self tableView] setDataSource:self];
[[self tableView] setDelegate:self];
[[self tableView] reloadData];