状态栏的颜色及可见性

有两种方法可以控制状态栏的颜色及可见性

一 使用UIApplication相关方法

1. 前提: 需要在Info.plist文件中设置 View controller-based status bar appearance 为 NO.
2. 注意：IOS9已经把这个方法声明为废弃方法了.
3. 代码如下

- (IBAction)changeColor:(UISegmentedControl *)sender {
    if (sender.selectedSegmentIndex == 0) {
        [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault animated:YES];
    } else {
        [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent animated:YES];
    }
}

- (IBAction)setHiddenStatus:(UISegmentedControl *)sender {
    if (sender.selectedSegmentIndex == 0) {
        [[UIApplication sharedApplication] setStatusBarHidden:NO animated:YES];
    } else {
        [[UIApplication sharedApplication] setStatusBarHidden:YES animated:YES];
    }
}

二 使用UIViewController相关方法

1. 前提：需要在Info.plist文件中设置 View controller-based status bar appearance 为 YES. 或者去掉这个键值对，默认为YES.
2. 代码如下

- (IBAction)changeColor:(UISegmentedControl *)sender {
    [self setNeedsStatusBarAppearanceUpdate];
}

- (IBAction)setHiddenStatus:(UISegmentedControl *)sender {
    [self setNeedsStatusBarAppearanceUpdate];
}

#pragma mark - UIViewController 相关方法

- (UIStatusBarStyle)preferredStatusBarStyle
{
    if (self.colorSegmentControl.selectedSegmentIndex == 0) {
        return UIStatusBarStyleDefault;
    }
    return UIStatusBarStyleLightContent;
}

- (BOOL)prefersStatusBarHidden
{
    if (self.hiddenSegmentControl.selectedSegmentIndex == 0) {
        return NO;
    }
    return YES;
}

//状态栏隐藏或显示的动画
- (UIStatusBarAnimation)preferredStatusBarUpdateAnimation
{
    return UIStatusBarAnimationFade;
}