iOS7默认状态栏文字颜色为黑色   

修改为白色的方法：(chenyong注意 我的Status bar style 使用的仍是默认值Gray style(default))

1在Info.plist中设置View controller-based status bar appearance 为NO

2 在需要改变状态栏颜色的ViewController中在ViewDidLoad方法中增加：

[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];

如下：

- (void)viewDidLoad{    [super viewDidLoad];    // Do any additional setup after loading the view from its nib.    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackTranslucent];}

如果需要在全部View中都变色，可以写在父类的相关方法中。

在使用Cordova的时候遇到的状态栏合并问题

- (void)viewWillAppear:(BOOL)animated{    // View defaults to full size.  If you want to customize the view's size, or its subviews (e.g. webView),    // you can do so here.        // 导航与状态栏合并的问题    float currentVersion = [[[UIDevice currentDevice] systemVersion] floatValue];        if (currentVersion >= 7) {        // bounds 是以自身的左上角为坐标原点        CGRect viewBounds = [self.webView bounds];        viewBounds.origin.y = 20;        viewBounds.size.height = viewBounds.size.height - 20;        self.webView.frame = viewBounds;        self.view.backgroundColor = [UIColor blackColor];    }    [super viewWillAppear:animated];}