iOS7 设置状态栏文字颜色

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发布时间：2019-05-24

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在info.plist中，将View controller-based status bar appearance设置不同值，有不同的处理方法 一、将View controller-based status bar appearance设为YES或者没有设置

View controller-based status bar appearance的默认值就是YES，如果View controller-based status bar appearance为YES，那么下面这个方法无效

[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault animated:YES];

需要在VC中做一些处理

1、在VC中重写preferredStatusBarStyle

- (UIStatusBarStyle) preferredStatusBarStyle{    return UIStatusBarStyleDefault;}

2、在VC中调用

[

self

setNeedsStatusBarAppearanceUpdate

]方法来更新状态栏字体，该方法会触发VC中的preferredStatusBarStyle方法。

但是，当VC在UINavigationController中时，上面方法无效，VC中的preferredStatusBarStyle方法不会被调用。

原因在于preferredStatusBarStyle在UINavigationController被调用，VC中的preferredStatusBarStyle方法不会被调用。

解决办法有2个：

方法1：设置self.navigationController.navigationBar的barStyle，该属性会影响状态栏的字体何背景色。

// 状态栏文字颜色将改变成白色// 导航栏的背景色将改变成黑色。self.navigationController.navigationBar.barStyle = UIBarStyleBlack;    // 状态栏文字颜色将改变成黑色// 导航栏的背景色将改变成白色self.navigationController.navigationBar.barStyle = UIBarStyleDefault;

方法2：在UINavigationController中重写preferredStatusBarStyle方法。

- (UIStatusBarStyle)preferredStatusBarStyle{    UIViewController* visibleViewController = self.visibleViewController;    return [visibleViewController preferredStatusBarStyle];}

二、将View controller-based status bar appearance设为NO

状态栏字体的颜色只由下面属性设定,默认是黑色:

// Dark content, for use on light backgrounds // default is UIStatusBarStyleDefault[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault animated:YES];

解决个别VC中状态栏字体颜色不同

1、在info.plist中，将View controller-based status bar appearance设为NO。

2、在App Delegate中

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{    // Override point for customization after application launch.    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault animated:NO];        return YES;}

3、在VC中处理状态栏颜色字体

-(void)viewWillAppear:(BOOL)animated{    // Super viewWillAppear    [super viewWillAppear:animated];    _previousStatusBarStyle = [[UIApplication sharedApplication] statusBarStyle];    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault animated:YES];}-(void)viewWillDisappear:(BOOL)animated{    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent animated:animated];        // Super viewWillDisappear    [super viewWillDisappear:animated];}

在VC中更完整的代码为

@interface ViewController ()@property (nonatomic,assign) UIStatusBarStyle previousStatusBarStyle;@end@implementation ViewController- (void)viewDidLoad{    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}-(void)viewWillAppear:(BOOL)animated{    // Super viewWillAppear    [super viewWillAppear:animated];    _previousStatusBarStyle = [[UIApplication sharedApplication] statusBarStyle];    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault animated:YES];}-(void)viewWillDisappear:(BOOL)animated{    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent animated:animated];        // Super viewWillDisappear    [super viewWillDisappear:animated];}@end