Question

当我点击表视图单元格时，它将在同一个表视图中一段时间（直到下一页完全加载）然后它将显示下一个视图..

我想点击表格视图单元格，它应该立即转到下一页并显示加载页面弹出窗口..

我尝试过使用impActivityAgent并且还尝试在进入下一页时显示警报视图（但是视图是前一页即表视图）..但是......它完全加载页面，这需要时间然后它显示警报..

在下一页我发布并解析需要时间的数据，在此期间我想显示活动指标..

我尝试了很多方法，但它仍然首先完全加载下一页，然后显示内容或alertView或活动指示器，当点击表视图单元格时，我无法显示活动指示器。

我的代码：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    nextTableViewController *doc = [[nextTableViewController alloc]initWithNibName:@"nextTableViewController" bundle:nil];
    [self.navigationController pushViewController:doc animated:YES];
}

和下一个视图控制器是：

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
[[ImpActivityAgent defaultAgent] makeBusy:YES];

NSURL *loadUrl = [NSURL URLWithString:[NSString stringWithFormat:@"http://%@/gmail.com",inputURL]];
htmlData = [NSData dataWithContentsOfURL:loadUrl];
self.htmlSTR = [[NSString alloc] initWithData:htmlData encoding:NSUTF8StringEncoding];
[self parseHTML];
}

在Parse函数中，我使用“hpple”Parser解析我在HTML格式中得到的内容。

Answer 1

只需使用一个单独的线程来处理解析。希望这段代码能帮到你。

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
[[ImpActivityAgent defaultAgent] makeBusy:YES];

[NSThread detachNewThreadSelector:@selector(newMethodForParsing) toTarget:self withObject:nil];

}


-(void)newMethodForParsing
{
NSURL *loadUrl = [NSURL URLWithString:[NSString stringWithFormat:@"http://%@/gmail.com",inputURL]];
htmlData = [NSData dataWithContentsOfURL:loadUrl];
self.htmlSTR = [[NSString alloc] initWithData:htmlData encoding:NSUTF8StringEncoding];
[self parseHTML];

[tableView reload]; // tableView refers to ur table view name

}

Answer 2

试试这个

-(void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    [[ImpActivityAgent defaultAgent] makeBusy:YES];
    [self performSelectorInBackground:@selector(start) withObject:Nil];
    //or you can use after delay then no need to use perform selector on main thread in start method.
    [self performSelector:@selector(start) withObject:nil afterDelay:0.5];
}

-(void)start
{
    NSURL *loadUrl = [NSURL URLWithString:[NSString stringWithFormat:@"http://%@/gmail.com",inputURL]];
    htmlData = [NSData dataWithContentsOfURL:loadUrl];
    self.htmlSTR = [[NSString alloc] initWithData:htmlData encoding:NSUTF8StringEncoding];
    [self performSelectorOnMainThread:@selector(parseHTML) withObject:Nil waitUntilDone:YES];
}

Answer 3

试试吧......

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(newMethodForParsing) userInfo:nil repeats:NO];
}

-(void)newMethodForParsing
{
NSURL *loadUrl = [NSURL URLWithString:[NSString stringWithFormat:@"http://%@/gmail.com",inputURL]];
htmlData = [NSData dataWithContentsOfURL:loadUrl];
self.htmlSTR = [[NSString alloc] initWithData:htmlData encoding:NSUTF8StringEncoding];
[self parseHTML];
}

Answer 4

Ganapathy的回答泄漏了内存，你需要在方法中放置一个autoreleasepool。这是一种更简单的方法。这将在主线程上运行，但在队列中的现有任务之后运行。

如果您希望它在另一个线程上运行，请替换为dispatch_get_global_queue()

- (void)viewDidLoad
{
   [super viewDidLoad];
   // Do any additional setup after loading the view from its nib.
   [[ImpActivityAgent defaultAgent] makeBusy:YES];

   dispatch_async(dispatch_get_main_queue(), ^{

      NSURL *loadUrl = [NSURL URLWithString:[NSString stringWithFormat:@"http://%@/gmail.com",inputURL]];
      htmlData = [NSData dataWithContentsOfURL:loadUrl];
      self.htmlSTR = [[NSString alloc] initWithData:htmlData encoding:NSUTF8StringEncoding];
      [self parseHTML];
   )
}

单击表视图单元格时加载缓慢

4 个答案: