How to set a value in completionHandler? - ios

Question

I had a problem regarding how can I set my NSArray in completionHandler block. I successfully assign a value for NSArray in my completion block, but once I tried to NSLog NSArray value outside completion block it gave 0.
Here is my full code.
//
// HomeTVC.m
// ABOX
//
// Created by Zero on 11/18/15.
// Copyright © 2015 Zero. All rights reserved.
//
#import "HomeTVC.h"
#import "facebook.h"
#interface HomeTVC ()<UITableViewDataSource, UITableViewDelegate>
{
NSDictionary *userPageLikesParams;
NSArray *pagesInfo;
facebook *fb;
}
#end
#implementation HomeTVC
- (void)viewDidLoad {
[super viewDidLoad];
self.tableView.delegate = self;
self.tableView.dataSource = self;
fb = [[facebook alloc] init];
userPageLikesParams = #{#"fields": #"about,name,created_time",#"limit": #"5"} ;
[fb getUserPagelikes:userPageLikesParams completionHandler:^(NSDictionary *pagesResult) {
pagesInfo = [[NSArray alloc] init];
pagesInfo = pagesResult[#"data"];
// NSArray *p = pagesResult[#"data"];
// [self pages:p];
}];
}
//- (void)pages:(NSArray*)pageInfo {
//
// self.pagesInfo = pageInfo;
// NSLog(#"fb pages result ayam : %#", self.pagesInfo[0]);
// NSLog(#"array counzz : %d", (int)self.pagesInfo.count);
//}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
// here I got 0, how can I solve this problem?
NSLog(#"table count : %d", (int)pagesInfo.count);
return 5;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"cell" forIndexPath:indexPath];
// Configure the cell...
return cell;
}
#end
Thanks in advance.

Answer 1

Reload your table view when the completion block finishes up and you should see your pagesInfo array populated and returning a count.

Answer 2

As per #michal, you should reload your tableView below like this:
- (void)viewDidLoad
{
[super viewDidLoad];
self.tableView.delegate = self;
self.tableView.dataSource = self;
fb = [[facebook alloc] init];
userPageLikesParams = #{#"fields": #"about,name,created_time",#"limit": #"5"} ;
[fb getUserPagelikes:userPageLikesParams completionHandler:^(NSDictionary *pagesResult)
{
pagesInfo = pagesResult[#"data"];
[yourTableViewObj reloadData];
// NSArray *p = pagesResult[#"data"];
// [self pages:p];
}];
}
Hope it will help.