1.在info.plist 里面加 key: View controller-based status bar appearance      value:NO

// 设置状态栏 前景颜色 ( 电池、时间)

- (void)setupStatusLight
{ 
    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];
}

// 设置状态栏 背景颜色
- (void)setupStatusBackgroud
{
    UIView *statusView = [[UIView alloc] initWithFrame:CGRectMake(0, -20, Screen_Width, 20)];
    statusView.backgroundColor = [UIColor whiteColor];

    [self.navigationController.navigationBar addSubview:statusView];

}