ios 状态栏statusBar的背景颜色

一、无导航条的情况:

系统默认状态栏的字体颜色为黑色,即UIStatusBarStyle=UIStatusBarStyleDefault,同时背景颜色和self.view.backgroundColor颜色一致,如下图所示:


14F49066-52A9-4892-AF66-D2F9ED0D9001.png


假如我想让状态栏颜色设置成红色,字体仍为黑色,可以在需要显示的那一页进行如下设置:(最好写在viewWillAppear里面)

//设置状态栏颜色
- (void)setStatusBarBackgroundColor:(UIColor *)color {

    UIView *statusBar = [[[UIApplication sharedApplication] valueForKey:@"statusBarWindow"] valueForKey:@"statusBar"];
    if ([statusBar respondsToSelector:@selector(setBackgroundColor:)]) {
        statusBar.backgroundColor = color;
    }
}

- (void)viewDidLoad {
    [super viewDidLoad];

    [self setStatusBarBackgroundColor:[UIColor redColor]];
    self.view.backgroundColor = [UIColor yellowColor];
}

效果如下:


50B2AB94-49CE-49AB-87A0-E6326C1CE00B.png


假如此时我想让状态栏文字颜色变成白色,可以这样操作:
在上面代码的基础上再添加下面一段代码:

- (UIStatusBarStyle)preferredStatusBarStyle{
    return UIStatusBarStyleLightContent;
}

效果如下:


ED915548-3B47-45EE-AA27-7D068881A946.png

问题来了,当你在这一页点击按钮进入下一页后,状态栏背景颜色不变,还是红色,而字体颜色却变成黑色了,比较闹心!可以通过下面的方法随心所欲的在任意一页修改状态栏的字体颜色(字体颜色只有白色和黑色)和背景颜色(直接复制到项目中即可

//设置字体颜色
- (UIStatusBarStyle)preferredStatusBarStyle{
    return UIStatusBarStyleLightContent;//白色
}

//设置状态栏颜色
- (void)setStatusBarBackgroundColor:(UIColor *)color {

    UIView *statusBar = [[[UIApplication sharedApplication] valueForKey:@"statusBarWindow"] valueForKey:@"statusBar"];
    if ([statusBar respondsToSelector:@selector(setBackgroundColor:)]) {
        statusBar.backgroundColor = color;
    }
}
//!!!重点在viewWillAppear方法里调用下面两个方法
-(void)viewWillAppear:(BOOL)animated{
    [self preferredStatusBarStyle];
    [self setStatusBarBackgroundColor:[UIColor redColor]];
}

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor yellowColor];
  }

下面的效果是第一页要红底白字,第二页要绿底黑字,返回后也是正常显示


9B2DA0CD-C106-4255-BA02-F34F55D59E99.png

50007497-1481-4F1E-9852-81BFD9CA7B9C.png

二、有导航条的情况

当我在上面的基础上添加了导航条后,会发现字体颜色由之前的白色变成黑色了,背景颜色倒没有发生变化


46CA6B3F-45D6-4628-9D34-0967320616D0.png

不用担心,可以通过下面的方法完美解决:

//设置状态栏颜色
- (void)setStatusBarBackgroundColor:(UIColor *)color {

    UIView *statusBar = [[[UIApplication sharedApplication] valueForKey:@"statusBarWindow"] valueForKey:@"statusBar"];
    if ([statusBar respondsToSelector:@selector(setBackgroundColor:)]) {
        statusBar.backgroundColor = color;
    }
}
-(void)viewWillAppear:(BOOL)animated{

    [self setStatusBarBackgroundColor:[UIColor redColor]];
     [UIApplication sharedApplication].statusBarStyle=UIStatusBarStyleLightContent;
}
--->!!!同时别忘了在info plist里面将View controller-based status bar appearance设置成NO,(默认是YES
现在基本的设备都适配ios7以上设备,默认的状态栏字体颜色是黑色
[UIApplicationsharedApplication].statusBarStyle=UIStatusBarStyleDefault;
现在基本的设备都适配ios7以上设备,默认的状态栏字体颜色是黑色
[UIApplicationsharedApplication].statusBarStyle=UIStatusBarStyleLightContent;

EC111815-4423-479F-BCBD-ADAE52F34E7C.png

54BC597D-F8B3-4EB5-BD0C-394AC0439073.png


Demo下载地址:https://github.com/zhuchenglong/StatusBarDemo

以下是我在实际项目中使用的:

//设置状态栏颜色
- (void)setStatusBarBackgroundColor:(UIColor *)color {

    UIView *statusBar = [[[UIApplication sharedApplication] valueForKey:@"statusBarWindow"] valueForKey:@"statusBar"];
    NSLog(@"statusBar.backgroundColor--->%@",statusBar.backgroundColor);
    if ([statusBar respondsToSelector:@selector(setBackgroundColor:)]) {
        statusBar.backgroundColor = color;
    }
}

- (UIStatusBarStyle)preferredStatusBarStyle{
    return UIStatusBarStyleLightContent;//白色
}

- (void)viewDidLoad {
    [super viewDidLoad];

    //Y起点在导航条下面
    self.edgesForExtendedLayout = UIRectEdgeNone;
    //设置navigationItem返回的文字
    UIBarButtonItem *item = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStyleDone target:nil action:nil];
    self.navigationItem.backBarButtonItem = item;
}

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

 //设置导航条透明度
    self.navigationController.navigationBar.translucent = NO;//不透明
    [[[self.navigationController.navigationBar subviews] objectAtIndex:0] setAlpha:1];
    //图标颜色为黑色
    [self.navigationController.navigationBar setTintColor:[UIColor blackColor]];
    //导航栏背景颜色
    [self.navigationController.navigationBar setBarTintColor:[UIColor whiteColor]];
    //导航条下面的黑线
    self.navigationController.navigationBar.clipsToBounds = NO;

    //刷新状态栏背景颜色
   // [self setNeedsStatusBarAppearanceUpdate];

    //设置状态栏颜色
    [self setStatusBarBackgroundColor:[UIColor blackColor]];
}
//一定要在viewWillDisappear里面写,如果写在viewDidDisappear里面会出问题!!!!
- (void)viewWillDisappear:(BOOL)animated{
    [super viewWillDisappear:animated];
    //为了不影响其他页面在viewDidDisappear做以下设置
    self.navigationController.navigationBar.translucent = YES;//透明
    [self setStatusBarBackgroundColor:[UIColor clearColor]];
}

效果:


81331546-9FF9-4314-96D7-29798D9034B0.png

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