iphone - ios5.1 在iphone状态栏顶部添加UIView

Question

我正在尝试在状态栏顶部添加一个 View 。我一直在关注这个帖子:Adding view on StatusBar in iPhone

由于某种原因，当我创建窗口并将“隐藏”设置为“否”时，该 View 似乎没有显示在状态栏顶部。这个实现在ios5.1中仍然有效吗？

谢谢!

这是我的自定义 UIWindow 类:

@implementation StatusBarOverlay

- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
    // Place the window on the correct level and position
    self.hidden = NO;
    self.windowLevel = UIWindowLevelStatusBar+1.0f;
    self.frame = [[UIApplication sharedApplication] statusBarFrame];

    // Create an image view with an image to make it look like a status bar.
    UIImageView *backgroundImageView = [[UIImageView alloc] initWithFrame:self.frame];
    backgroundImageView.image = [UIImage imageNamed:@"bar_0.png"];
    backgroundImageView.animationImages = [NSArray arrayWithObjects:[UIImage     imageNamed:@"bar_1.png"],
                                           [UIImage imageNamed:@"bar_2.png"],
                                           [UIImage imageNamed:@"bar_3.png"],
                                           nil];
    backgroundImageView.animationDuration = 0.8;
    [backgroundImageView startAnimating];
    [self addSubview:backgroundImageView];
}
return self;
}

在我的 View Controller 中，我创建了新窗口并在 viewDidLoad 中调用它:

StatusBarOverlay *overlayWindow = [[StatusBarOverlay alloc] initWithFrame:CGRectZero];
[overlayWindow makeKeyAndVisible];

但是， View 仍然没有显示。知道为什么吗？

Answer 1

将应用程序的窗口级别设置为 UIWindowLevelStatusBar:

self.window.windowLevel = UIWindowLevelStatusBar;

然后将您自己的 View 添加到应用程序窗口的任意位置:

[[[UIApplication sharedApplication]delegate].window addSubview:yourview];

这个问题最近出现在我身上，我就是通过这种方式解决的