Question

我想重新签名包含活动指标的UIAlertView。我正在下面的代码。它在加载数据时正在工作，但UIalertview在成功解析后没有重新签名。我应该在这里给出什么条件？

   - (void) updateFilterProgress{
NSAutoreleasePool *pool = [NSAutoreleasePool new];
UIAlertView *alert = [[[UIAlertView alloc] initWithTitle:@"Loading..."      message:nil delegate:self cancelButtonTitle:nil otherButtonTitles: nil] autorelease];
[alert show];

UIActivityIndicatorView *indicator = [[UIActivityIndicatorView alloc]       initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];

// Adjust the indicator so it is up a few pixels from the bottom of the alert
indicator.center = CGPointMake(alert.bounds.size.width / 2, alert.bounds.size.height   - 50);
[indicator startAnimating];
[alert addSubview:indicator];
[indicator release];
[pool release];
}

在我的按钮点击事件中，我输入以下代码

     // **EDIT==1**
      [NSThread detachNewThreadSelector:@selector(updateFilterProgress) toTarget:self withObject:nil];toTarget:self withObject:nil];                                //for calling updateFilterProgress


        NSString *url = [NSString   stringWithFormat:@"http://....url...../hespdirectory/phpsqlsearch_genxml.php?lat=%f&radius=%f&lng=%f",lati,longi,radius];
//NSLog(@"NSString *url");
NSLog(@"%@", url);

//NSString *escapedUrl = [url stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]

NSURL *URL = [NSURL URLWithString:url];
NSXMLParser *xmlParser = [[NSXMLParser alloc] initWithContentsOfURL:URL];
//Initialize the delegate.
XMLParser *parser = [[XMLParser alloc] initXMLParser];
//Set delegate
[xmlParser setDelegate:parser];
//Start parsing the XML file.
BOOL success = [xmlParser parse];
if(success)

{   **//EDIT==2**

    [alert dismissWithClickedButtonIndex:0 animated:YES];     //for resigning alertview 

    for (int i = 0; i < [appDelegate.markers count]; i++)
{

    //marker *aMarker = [[marker alloc] init];
    marker *aMarker = [appDelegate.markers objectAtIndex:i];
    location.latitude = [aMarker.lat floatValue];
    location.longitude =[aMarker.lng floatValue];
    AddressAnnotation *annobj = [[AddressAnnotation alloc] initWithCoordinate:location];

    annobj.title = aMarker.name;
    [mapView addAnnotation:annobj];
    [annobj release];
         }
 }

我想重新签名这个包含活动指示符的UIAlertView .......

Answer 1

将UIAlertView和ActivityIndicator（以及警报视图中的所有对象）设置为类文件的成员。

然后，您通常会释放这些项目（以及您要解除警报的位置），您可以这样称呼：

[myAlertView dismissWithClickedButtonIndex:0 animated:YES];

这与用户单击其上的取消按钮具有相同的效果，这是完全可以接受的。

希望这有帮助！

解析时UIAlertview问题中的进度条

1 个答案: