iOS 如何修改状态栏颜色为白色

1.首先在plist文件中添加一key值:
View controller-based status bar appearance
设置为 NO

2.在AppDelegate中添加代码：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

// Override point for customization after application launch.

//状态栏设为白色

[UIApplication
sharedApplication].statusBarStyle =
UIStatusBarStyleLightContent;

self.window=[[UIWindow
alloc]initWithFrame:[UIScreen
mainScreen].bounds];