活动指示器与主从应用程序集成

Question

我用 ios5 在故事板中制作了一个 iPad 主从应用程序。

我用 NSURL 制作表格视图。

我的问题和帮助是，我想要 NSURL 的活动指示器，这样当我单击表格视图中的单元格时，他会在页面加载时显示活动指示器，并在完成活动指示器时显示活动指示器。

这是我在 MAsterViewController 中的代码：

#import "MasterViewController.h"

#import "DetailViewController.h"


@interface MasterViewController (PrivateMethods)
-(void)LocateArtistPageInSafari;
-(void)LocateArtist2PageInSafari;
-(void)LocateArtist3PageInSafari;
-(void)DeselectRow;

@end


@implementation MasterViewController

@synthesize detailViewController = _detailViewController;




- (void)awakeFromNib
{
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
        self.clearsSelectionOnViewWillAppear = NO;
        self.contentSizeForViewInPopover = CGSizeMake(320.0, 600.0);
    }
    [super awakeFromNib];
}

- (void)dealloc
{
    [_detailViewController release];
    [super dealloc];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle


- (void)viewDidLoad
{
    [super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
    self.detailViewController = (DetailViewController *)[[self.splitViewController.viewControllers lastObject] topViewController];
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
        [self.tableView selectRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0] animated:NO scrollPosition:UITableViewScrollPositionMiddle];

        self.detailViewController.webView.delegate = self;
    }
}


- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
}

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
}

- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
}

- (void)viewDidDisappear:(BOOL)animated
{
[super viewDidDisappear:animated];
}



- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
        return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
    } else {
        return YES;
    }
}



- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{


    NSInteger nSelectedRowIdx = indexPath.section *2 + indexPath.row;
    switch (nSelectedRowIdx)

    {


        case 0:
            [self LocateArtistPageInSafari];
                break;

        case 1:
            [self LocateArtist2PageInSafari];

            break;

        case 2:
            [self LocateArtist3PageInSafari];
            break;

    }

    //[self DeselectRow];
}

-(void)DeselectRow
{
    // Unselect the selected row if any
    NSIndexPath* selection = [self.tableView indexPathForSelectedRow];
    if (selection) {
        [self.tableView deselectRowAtIndexPath:selection animated:YES];

    }
    [self.tableView reloadData];

}



-(void)LocateArtistPageInSafari
{
    NSURL *urlInSafari = [NSURL URLWithString:@"http://interia.pl"];

    // if we have an iPAD...
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
        // then open page in detail view (UIWebView)
        NSURLRequest *urlRequest = [NSURLRequest requestWithURL:urlInSafari];

        [self.detailViewController.webView loadRequest:urlRequest];

    }
}


-(void)LocateArtist2PageInSafari
{
    NSURL *urlInSafari = [NSURL URLWithString:@"http://on.fb.me/nFwQj6"];
    // if we have an iPAD...
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
        // then open page in detail view (UIWebView)
        NSURLRequest *urlRequest = [NSURLRequest requestWithURL:urlInSafari];
        [self.detailViewController.webView loadRequest:urlRequest];
    }
}


-(void)LocateArtist3PageInSafari
{
    NSURL *urlInSafari = [NSURL URLWithString:@"http://bit.ly/nxY8AZ"];

    // if we have an iPAD...
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) {
        // then open page in detail view (UIWebView)
        NSURLRequest *urlRequest = [NSURLRequest requestWithURL:urlInSafari];
        [self.detailViewController.webView loadRequest:urlRequest];

    }
}

@end

我希望有人可以帮助我！！！！多谢