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在我的应用程序中，我正在从服务器接收数据。使用这些数据，我填充了一个表视图 (MasterViewController)，当我选择该表中的一项时，它会在 DetailViewController 中显示详细信息。这些信息在应用程序每次启动或用户按下刷新按钮时加载。

在从服务器接收数据时，我想显示一个包含 UIActivityIndi​​catorView 和显示“正在加载...”的标签的视图。当我的应用程序以纵向模式启动或刷新时，这工作得很好。但是当我在横向模式下尝试相同时，我的视图大小不正确。

这是我用来加载视图的代码：

+ (SpinnerView *)loadSpinnerViewIntoView:(UIView *)superView {

    SpinnerView *spinnerView = [[SpinnerView alloc] initWithFrame:superView.bounds];

    if (!spinnerView)
        return nil;

    UIImageView *background = [[UIImageView alloc] initWithImage:[spinnerView addBackground]];
    background.alpha = 0.7;
    [spinnerView addSubview:background];

    UIActivityIndicatorView *indicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
    indicator.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleLeftMargin;
    indicator.center = superView.center;
    [spinnerView addSubview:indicator];
    [indicator startAnimating];   

    CGSize maximumLabelSize = CGSizeMake(296, 9999);
    CGSize expectedLabelSize = [[NSString stringWithString:@"Loading..."] sizeWithFont:[UIFont boldSystemFontOfSize:25.0f] constrainedToSize:maximumLabelSize];

    UILabel *loadingLbl = [[UILabel alloc] initWithFrame:CGRectMake(0.0, 0.0, expectedLabelSize.width, expectedLabelSize.height)];
    loadingLbl.text = @"Loading...";
    loadingLbl.font = [UIFont boldSystemFontOfSize:25.0f];
    loadingLbl.autoresizingMask = UIViewAutoresizingFlexibleWidth;
    loadingLbl.backgroundColor = [UIColor clearColor];
    loadingLbl.textColor = [UIColor whiteColor];
    loadingLbl.center = CGPointMake(superView.center.x, superView.center.y - indicator.frame.size.height - 25);
    [spinnerView addSubview:loadingLbl];   

    [superView addSubview:spinnerView];

    CATransition *animation = [CATransition animation];
    [animation setType:kCATransitionFade];
    [[superView layer] addAnimation:animation forKey:@"layerAnimation"];

    return spinnerView;
}

当我开始更新我的数据时，这是从我的 MasterViewController 调用的：

spinner = [SpinnerView loadSpinnerViewIntoView:self.splitViewController.view];

SpinnerView 在加载时获得与视图相同的边界。我真的不明白为什么它不能在横向模式下正确显示。我希望我的问题是可以理解的，任何人都可以帮助我。

提前致谢

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1 回答 1

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我终于通过将 SinnerView 调用更改为：

+ (SpinnerView *)loadSpinnerViewIntoView:(UIView *)superView withFrame:(CGRect)frame {

    SpinnerView *spinnerView = [[SpinnerView alloc] initWithFrame:frame];

    if (!spinnerView)
        return nil;

    .
    .
    .        

    return spinnerView;
}

并从我的 viewDidLoad 方法中调用一个函数，如下所示：

[self performSelectorOnMainThread:@selector(checkLaunchOrientation:) withObject:nil waitUntilDone:NO];

这是功能：

- (void)checkLaunchOrientation:(id)sender {

    UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;

    if (UIInterfaceOrientationIsLandscape(orientation))
        spinner = [SpinnerView loadSpinnerViewIntoView:self.splitViewController.view withFrame:CGRectMake(0.0, 0.0, [UIScreen mainScreen].bounds.size.height, [UIScreen mainScreen].bounds.size.width)];
    else
        spinner = [SpinnerView loadSpinnerViewIntoView:self.splitViewController.view withFrame:self.splitViewController.view.bounds];
}

这是一种解决方法，但它对我有用......

于 2013-01-30T10:24:07.163 回答