ios - 如何更快地下载新闻？

Question

我有一个UITableViewController类，我在viewDidLoad方法中下载了代码。
该代码可以吗？我不太确定要下载和显示内容。因为显示新闻要花费很多时间，并且表格滚动滞后。抱歉，我是 objective-c 的新手。

@implementation NewsViewController
- (void)viewDidLoad
{


   // _sidebarButton.tintColor = [UIColor colorWithWhite:0.96f alpha:0.2f];
    _sidebarButton.target = self.revealViewController;
    _sidebarButton.action = @selector(revealToggle:);
    [self.view addGestureRecognizer:self.revealViewController.panGestureRecognizer];
    [super viewDidLoad];
    [self getJSON];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return currentCellsCount;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";

    CellForNews *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];

    id tempObject=[self.arrayOfNews objectAtIndex:indexPath.row];
    cell.publishDate.text=tempObject[@"publish_date"];
    NSData *data=[NSData dataWithContentsOfURL:[NSURL URLWithString:tempObject[@"img_path"]]];
    cell.newsImage.image=[UIImage imageWithData:data];
    cell.descriptionOfThenews.text=tempObject[@"body"];
    cell.titleOfTheNews.text=tempObject[@"publish_title"];

    return cell;
}

-(void)getJSON{

    NSString *path=@"example.com";


    NSURL *url=[NSURL URLWithString:path];

    NSString *dataJSON=[NSString stringWithContentsOfURL:url
                                                encoding:NSUTF8StringEncoding
                                                   error:Nil];

    NSData *data=[dataJSON dataUsingEncoding:NSUTF8StringEncoding];
    NSDictionary *rootDictionary=[NSJSONSerialization JSONObjectWithData:data
                                                                 options:kNilOptions
                                                                   error:nil];

    NSDictionary *newsDict=[rootDictionary objectForKey:@"publications"];
    id marker=[[NSObject alloc]init];
    self.arrayOfNews=(NSMutableArray*)[newsDict objectsForKeys:[newsDict allKeys] notFoundMarker:marker];
    currentCellsCount=[newsDict allKeys].count;


}

Answer 1

不要三思而后行。对于任何联网操作，请使用AFnetworking，对于任何图像Web加载，请使用SDWebImage