ios7 隐藏电池栏

1.在viewController下面添加如下代码：

    if ([self respondsToSelector:@selector(setNeedsStatusBarAppearanceUpdate)]) {
        [self prefersStatusBarHidden];
        [self performSelector:@selector(setNeedsStatusBarAppearanceUpdate)];
    }
- (BOOL)prefersStatusBarHidden
{
    return YES;
}

2.在plist里设置：

首先设置key：Status bar is initially hidden    为YES

然后设置key：View controller-based status bar appearance  为NO

即可实现全局隐藏状态栏了